Free Standard AU & NZ Shipping For All Book Orders Over $80!
Register      Login
Crop and Pasture Science Crop and Pasture Science Society
Plant sciences, sustainable farming systems and food quality
RESEARCH ARTICLE (Open Access)

Iron fortification of food crops through nanofertilisation

Gaurav Chugh https://orcid.org/0000-0002-8011-8855 A , Kadambot H. M. Siddique https://orcid.org/0000-0001-6097-4235 B and Zakaria M. Solaiman https://orcid.org/0000-0001-7014-7532 B *
+ Author Affiliations
- Author Affiliations

A Discipline of Microbiology, School of Natural Sciences, The Ryan Institute, National University of Ireland Galway, University Road, Galway H91 TK33, Ireland.

B The UWA Institute of Agriculture, and the UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia.

* Correspondence to: zakaria.solaiman@uwa.edu.au

Handling Editor: Shahid Hussain

Crop & Pasture Science - https://doi.org/10.1071/CP21436
Submitted: 23 June 2021  Accepted: 25 November 2021   Published online: 18 March 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)

Abstract

Micronutrient deficiencies are a significant cause of malnutrition worldwide, particularly in developing countries, affecting nearly 1.8 billion people worldwide. Agriculture is the primary source of nutrients for humans, but the increasing population and reducing arable lands areas are putting the agricultural sector under pressure, particularly in developing and less developed countries, and calls for intensive farming to increase crop yield to overcome food and nutrients deficiency challenges. Iron is an essential microelement that plays a vital role in plant and human growth, and metabolism, but its deficiency is widely reported and affects nearly one-third of the world population. To combat micronutrient deficiency, crops must have improved nutritional qualities or be biofortified. Several biofortification programs with conventional breeding, biotechnological and agronomic approaches have been implemented with limited success in providing essential nutrients, especially in developing and under-developed countries. The use of nanofertilisers as agronomic biofortification method to increase yields and nutrients, micronutrient availability in soil and uptake in plant parts, and minimising the reliance on harmful chemical fertilisers is essential. Using nanoparticles as nanofertilisers is a promising approach for improving the sustainability of current agricultural practices and for the biofortification of food crop production with essential micronutrients, thus enhanced nutritional quality. This review evaluates the current use of iron nanofertilisers for biofortification in several food crops addressing critical knowledge gaps and challenges that must be addressed to optimise the sustainable application.

Keywords: biofortification, conventional fertiliser, food crop, iron deficiency, micronutrients, nanofertiliser.


References

Afzal S, Sirohi P, Sharma D, Singh NK (2020) Micronutrient movement and signalling in plants from a biofortification perspective. In ‘Plant micronutrients.’ pp. 129–171.

Aciksoz SB, Yazici A, Ozturk L, Cakmak I (2011) Biofortification of wheat with iron through soil and foliar application of nitrogen and iron fertilizers. Plant and Soil 349, 215–225.

Al-Amri N, Tombuloglu H, Slimani Y, Akhtar S, Barghouthi M, Almessiere M, Alshammari T, Baykal A, Sabit H, Ercan I, Ozcelik S (2020) Size effect of iron (III) oxide nanomaterials on the growth, and their uptake and translocation in common wheat (Triticum aestivum L.). Ecotoxicology and Environmental Safety 194, 110377
Size effect of iron (III) oxide nanomaterials on the growth, and their uptake and translocation in common wheat (Triticum aestivum L.).Crossref | GoogleScholarGoogle Scholar | 32145527PubMed |

Al-Salim N, Barraclough E, Burgess E, Clothier B, Deurer M, Green S, Malone L, Weir G (2011) Quantum dot transport in soil, plants, and insects. Science of the Total Environment 409, 3237–3248.
Quantum dot transport in soil, plants, and insects.Crossref | GoogleScholarGoogle Scholar |

Ali A, Zafar H, Zia M, ul Haq I, Phull AR, Ali JS, Hussain A (2016) Synthesis, characterization, applications, and challenges of iron oxide nanoparticles. Nanotechnology, Science and Applications 9, 49–67.
Synthesis, characterization, applications, and challenges of iron oxide nanoparticles.Crossref | GoogleScholarGoogle Scholar | 27578966PubMed |

Alidoust D, Isoda A (2013) Effect of γFe2O3 nanoparticles on photosynthetic characteristic of soybean (Glycine max (L.) Merr.): foliar spray versus soil amendment. Acta Physiologiae Plantarum 35, 3365–3375.

Alloway BJ (2009) Soil factors associated with zinc deficiency in crops and humans. Environmental Geochemistry and Health 31, 537–548.
Soil factors associated with zinc deficiency in crops and humans.Crossref | GoogleScholarGoogle Scholar | 19291414PubMed |

Amuamuha L, Pirzad A, Hadi H (2012) Effect of varying concentrations and time of Nanoiron foliar application on the yield and essential oil of Pot marigold. International Research Journal of Applied and Basic Sciences 3, 2085–2090.

Anderson A, McLean J, McManus P, Britt D (2017) Soil chemistry influences the phytotoxicity of metal oxide nanoparticles. International Journal of Nanotechnology 14, 15–21.
Soil chemistry influences the phytotoxicity of metal oxide nanoparticles.Crossref | GoogleScholarGoogle Scholar |

Anuradha N, Satyavathi CT, Bharadwaj C, Nepolean T, Sankar SM, Singh SP, Meena MC, Singhal T, Srivastava RK (2017) Deciphering genomic regions for high grain iron and zinc content using association mapping in pearl millet. Frontiers in Plant Science 8, 412
Deciphering genomic regions for high grain iron and zinc content using association mapping in pearl millet.Crossref | GoogleScholarGoogle Scholar | 28507551PubMed |

Arshad M, Azam A, Ahmed AS, Mollah S, Naqvi AH (2011) Effect of Co substitution on the structural and optical properties of ZnO nanoparticles synthesized by sol–gel route. Journal of Alloys and Compounds 509, 8378–8381.
Effect of Co substitution on the structural and optical properties of ZnO nanoparticles synthesized by sol–gel route.Crossref | GoogleScholarGoogle Scholar |

Assainar SK, Abbott LK, Mickan BS, Storer PJ, Whiteley AS, Siddique KHM, Solaiman ZM (2020) Polymer-coated rock mineral fertilizer has potential to substitute soluble fertilizer for increasing growth, nutrient uptake, and yield of wheat. Biology and Fertility of Soils 56, 381–394.

Avellan A, Yun J, Morais BP, Clement ET, Rodrigues SM, Lowry G V (2021) Critical Review: Role of inorganic nanoparticle properties on their foliar uptake and in planta translocation. Environmental Science and Technology 55, 13417–13431.
Critical Review: Role of inorganic nanoparticle properties on their foliar uptake and in planta translocation.Crossref | GoogleScholarGoogle Scholar | 33988374PubMed |

Barrett CB (2010) Measuring food insecurity. Science 327, 825–828.
Measuring food insecurity.Crossref | GoogleScholarGoogle Scholar | 20150491PubMed |

Boonyaves K, Wu T-Y, Gruissem W, Bhullar NK (2017) Enhanced grain iron levels in rice expressing an iron-regulated metal transporter, nicotianamine synthase, and ferritin gene cassette. Frontiers in Plant Science 8, 130
Enhanced grain iron levels in rice expressing an iron-regulated metal transporter, nicotianamine synthase, and ferritin gene cassette.Crossref | GoogleScholarGoogle Scholar | 28223994PubMed |

Bouis HE (2003) Micronutrient fortification of plants through plant breeding: can it improve nutrition in man at low cost? Proceedings of the Nutrition Society 62, 403–411.
Micronutrient fortification of plants through plant breeding: can it improve nutrition in man at low cost?Crossref | GoogleScholarGoogle Scholar |

Bouis HE, Saltzman A (2017) Improving nutrition through biofortification: a review of evidence from HarvestPlus, 2003 through 2016. Global Food Security 12, 49–58.
Improving nutrition through biofortification: a review of evidence from HarvestPlus, 2003 through 2016.Crossref | GoogleScholarGoogle Scholar | 28580239PubMed |

Bouis HE, Welch RM (2010) Biofortification—a sustainable agricultural strategy for reducing micronutrient malnutrition in the global south. Crop Science 50, S-20–S-32.
Biofortification—a sustainable agricultural strategy for reducing micronutrient malnutrition in the global south.Crossref | GoogleScholarGoogle Scholar |

Bouis HE, Hotz C, McClafferty B, Meenakshi J V, Pfeiffer WH (2011) Biofortification: a new tool to reduce micronutrient malnutrition. Food and Nutrition Bulletin 32, S31–S40.
Biofortification: a new tool to reduce micronutrient malnutrition.Crossref | GoogleScholarGoogle Scholar | 21717916PubMed |

Burchi F, Fanzo J, Frison E (2011) The role of food and nutrition system approaches in tackling hidden hunger. International Journal of Environmental Research and Public Health 8, 358–373.
The role of food and nutrition system approaches in tackling hidden hunger.Crossref | GoogleScholarGoogle Scholar | 21556191PubMed |

Cakmak I (2008) Enrichment of cereal grains with zinc: agronomic or genetic biofortification? Plant and Soil 302, 1–17.

Cakmak I, Kalayci M, Kaya Y, Torun AA, Aydin N, Wang Y, Arisoy Z, Erdem H, Yazici A, Gokmen O, Ozturk L, Horst WJ (2010) Biofortification and localization of zinc in wheat grain. Journal of Agricultural and Food Chemistry 58, 9092–9102.
Biofortification and localization of zinc in wheat grain.Crossref | GoogleScholarGoogle Scholar | 23654236PubMed |

Cantera RG, Zamarreño AM, García-Mina JM (2002) Characterization of commercial iron chelates and their behavior in an alkaline and calcareous soil. Journal of Agricultural and Food Chemistry 50, 7609–7615.
Characterization of commercial iron chelates and their behavior in an alkaline and calcareous soil.Crossref | GoogleScholarGoogle Scholar | 12475278PubMed |

Cao J, Feng Y, Lin X, Wang J (2016) Arbuscular mycorrhizal fungi alleviate the negative effects of iron oxide nanoparticles on bacterial community in rhizospheric soils. Frontiers in Environmental Science 4, 10
Arbuscular mycorrhizal fungi alleviate the negative effects of iron oxide nanoparticles on bacterial community in rhizospheric soils.Crossref | GoogleScholarGoogle Scholar |

Chandra AK, Pandey D, Tiwari A, Gururani K, Agarwal A, Dhasmana A, Kumar A (2021) Metal based nanoparticles trigger the differential expression of key regulatory genes which regulate iron and zinc homeostasis mechanism in finger millet. Journal of Cereal Science 100, 103235
Metal based nanoparticles trigger the differential expression of key regulatory genes which regulate iron and zinc homeostasis mechanism in finger millet.Crossref | GoogleScholarGoogle Scholar |

Chen X-P, Zhang Y-Q, Tong Y-P, Xue Y-F, Liu D-Y, Zhang W, Deng Y, Meng Q-F, Yue S-C, Yan P (2017) Harvesting more grain zinc of wheat for human health. Scientific Reports 7, 1–8.

Chichiriccò G, Poma A (2015) Penetration and toxicity of nanomaterials in higher plants. Nanomaterials 5, 851–873.
Penetration and toxicity of nanomaterials in higher plants.Crossref | GoogleScholarGoogle Scholar | 28347040PubMed |

Chithrani BD, Ghazani AA, Chan WCW (2006) Determining the size and shape dependence of gold nanoparticle uptake into mammalian cells. Nano Letters 6, 662–668.
Determining the size and shape dependence of gold nanoparticle uptake into mammalian cells.Crossref | GoogleScholarGoogle Scholar | 16608261PubMed |

Cho W-S, Duffin R, Howie SEM, Scotton CJ, Wallace WAH, MacNee W, Bradley M, Megson IL, Donaldson K (2011) Progressive severe lung injury by zinc oxide nanoparticles; the role of Zn2+ dissolution inside lysosomes. Particle and Fibre Toxicology 8, 27
Progressive severe lung injury by zinc oxide nanoparticles; the role of Zn2+ dissolution inside lysosomes.Crossref | GoogleScholarGoogle Scholar | 21896169PubMed |

Chugh G, Siddique KHM, Solaiman ZM (2021a) Nanobiotechnology for agriculture: smart technology for combating nutrient deficiencies with nanotoxicity challenges. Sustainability 13, 1781
Nanobiotechnology for agriculture: smart technology for combating nutrient deficiencies with nanotoxicity challenges.Crossref | GoogleScholarGoogle Scholar |

Chugh G, Singh BR, Adholeya A, Barrow CJ (2021b) Role of proteins in the biosynthesis and functioning of metallic nanoparticles. Critical Reviews in Biotechnology 4, 1–16.
Role of proteins in the biosynthesis and functioning of metallic nanoparticles.Crossref | GoogleScholarGoogle Scholar |

Cifuentes Z, Custardoy L, de la Fuente JM, Marquina C, Ibarra MR, Rubiales D, Pérez-de-Luque A (2010) Absorption and translocation to the aerial part of magnetic carbon-coated nanoparticles through the root of different crop plants. Journal of Nanobiotechnology 8, 26
Absorption and translocation to the aerial part of magnetic carbon-coated nanoparticles through the root of different crop plants.Crossref | GoogleScholarGoogle Scholar | 21059206PubMed |

Connor DJ, Loomis RS, Cassman KG (2011) ‘Crop ecology: productivity and management in agricultural systems,’ (Cambridge University Press: Cambridge, UK)

Cornell RM, Schwertmann U (2003) ‘The iron oxides: structure, properties, reactions, occurrences and uses.’ (John Wiley & Sons)

Corredor E, Testillano PS, Coronado M-J, González-Melendi P, Fernández-Pacheco R, Marquina C, Ibarra MR, de la Fuente JM, Rubiales D, Pérez-de-Luque A (2009) Nanoparticle penetration and transport in living pumpkin plants: in situ subcellular identification. BMC Plant Biology 9, 45
Nanoparticle penetration and transport in living pumpkin plants: in situ subcellular identification.Crossref | GoogleScholarGoogle Scholar | 19389253PubMed |

Cuenya BR (2010) Synthesis and catalytic properties of metal nanoparticles: size, shape, support, composition, and oxidation state effects. Thin Solid Films 518, 3127–3150.
Synthesis and catalytic properties of metal nanoparticles: size, shape, support, composition, and oxidation state effects.Crossref | GoogleScholarGoogle Scholar |

Dapkekar A, Deshpande P, Oak MD, Paknikar KM, Rajwade JM (2018) Zinc use efficiency is enhanced in wheat through nanofertilization. Scientific Reports 8, 1–7.

Das JK, Salam RA, Kumar R, Bhutta ZA (2013) Micronutrient fortification of food and its impact on woman and child health: a systematic review. Systematic Reviews 2, 67
Micronutrient fortification of food and its impact on woman and child health: a systematic review.Crossref | GoogleScholarGoogle Scholar | 23971426PubMed |

Das RK, Brar SK, Verma M (2016) Checking the biocompatibility of plant-derived metallic nanoparticles: molecular perspectives. Trends in Biotechnology 34, 440–449.
Checking the biocompatibility of plant-derived metallic nanoparticles: molecular perspectives.Crossref | GoogleScholarGoogle Scholar | 26948438PubMed |

Decuzzi P, Ferrari M (2007) The role of specific and non-specific interactions in receptor-mediated endocytosis of nanoparticles. Biomaterials 28, 2915–2922.
The role of specific and non-specific interactions in receptor-mediated endocytosis of nanoparticles.Crossref | GoogleScholarGoogle Scholar | 17363051PubMed |

Delfani M, Baradarn Firouzabadi M, Farrokhi N, Makarian H (2014) Some physiological responses of black-eyed pea to iron and magnesium nanofertilizers. Communications in Soil Science and Plant Analysis 45, 530–540.

DeRosa MC, Monreal C, Schnitzer M, Walsh R, Sultan Y (2010) Nanotechnology in fertilizers. Nature Nanotechnology 5, 91

Dixit S, Shukla R, Sharma YK (2018) Biofortification of plant nutrients: present scenario. In ‘Plant nutrients and abiotic stress tolerance’. pp. 119–136. (Springer)

Elemike EE, Uzoh IM, Onwudiwe DC, Babalola OO (2019) The role of nanotechnology in the fortification of plant nutrients and improvement of crop production. Applied Sciences 9, 499
The role of nanotechnology in the fortification of plant nutrients and improvement of crop production.Crossref | GoogleScholarGoogle Scholar |

Fakharzadeh S, Hafizi M, Baghaei MA, Etesami M, Khayamzadeh M, Kalanaky S, Akbari ME, Nazaran MH (2020) Using nanochelating technology for biofortification and yield increase in rice. Scientific Reports 10, 1–9.

Feizi H, Moghaddam PR, Shahtahmassebi N, Fotovat A (2013) Assessment of concentrations of nano and bulk iron oxide particles on early growth of wheat (Triticum aestivum L.). Annual Research and Review in Biology 3, 752–761.

Geisler-Lee J, Wang Q, Yao Y, Zhang W, Geisler M, Li K, Huang Y, Chen Y, Kolmakov A, Ma X (2012) Phytotoxicity, accumulation and transport of silver nanoparticles by Arabidopsis thaliana. Nanotoxicology 7, 323–337.
Phytotoxicity, accumulation and transport of silver nanoparticles by Arabidopsis thaliana.Crossref | GoogleScholarGoogle Scholar | 22263604PubMed |

Ghafariyan MH, Malakouti MJ, Dadpour MR, Stroeve P, Mahmoudi M (2013) Effects of magnetite nanoparticles on soybean chlorophyll. Environmental Science and Technology 47, 10645–10652.
Effects of magnetite nanoparticles on soybean chlorophyll.Crossref | GoogleScholarGoogle Scholar | 23951999PubMed |

Gillispie EC, Taylor SE, Qafoku NP, Hochella MF (2019) Impact of iron and manganese nano-metal-oxides on contaminant interaction and fortification potential in agricultural systems – a review. Environmental Chemistry 16, 377–390.
Impact of iron and manganese nano-metal-oxides on contaminant interaction and fortification potential in agricultural systems – a review.Crossref | GoogleScholarGoogle Scholar |

Gordon N (1997) Nutrition and cognitive function. Brain and Development 19, 165–170.

Goswami N, Saha R, Pal SK (2011) Protein-assisted synthesis route of metal nanoparticles: exploration of key chemistry of the biomolecule. Journal of Nanoparticle Research 13, 5485–5495.
Protein-assisted synthesis route of metal nanoparticles: exploration of key chemistry of the biomolecule.Crossref | GoogleScholarGoogle Scholar |

Gupta AK, Gupta M (2005) Synthesis and surface engineering of iron oxide nanoparticles for biomedical applications. Biomaterials 26, 3995–4021.
Synthesis and surface engineering of iron oxide nanoparticles for biomedical applications.Crossref | GoogleScholarGoogle Scholar | 15626447PubMed |

Harsini MG, Habibi H, Talaei GH (2014) Study the effects of iron nano chelated fertilizers foliar application on yield and yield components of new line of wheat cold region of Kermanshah provence. Agricultural Advances 3, 95–102.

Hasler K, Bröring S, Omta SWF, Olfs H-W (2015) Life cycle assessment (LCA) of different fertilizer product types. European Journal of Agronomy 69, 41–51.

Hoa TTC, Lan NTP (2004) Effect of milling technology on iron content in rice grains of some leading varieties in the Mekong delta. Omonrice 12, 38–44.

Hossain SM, Mohiuddin AKM (2012) Study on biofortification of rice by targeted genetic engineering. International Journal of Agricultural Research, Innovation and Technology 2, 25–35.

Hotz C, Gibson RS (2007) Traditional food-processing and preparation practices to enhance the bioavailability of micronutrients in plant-based diets. The Journal of Nutrition 137, 1097–1100.
Traditional food-processing and preparation practices to enhance the bioavailability of micronutrients in plant-based diets.Crossref | GoogleScholarGoogle Scholar | 17374686PubMed |

Hu J, Guo H, Li J, Wang Y, Xiao L, Xing B (2017) Interaction of γ-Fe2O3 nanoparticles with Citrus maxima leaves and the corresponding physiological effects via foliar application. Journal of Nanobiotechnology 15, 51
Interaction of γ-Fe2O3 nanoparticles with Citrus maxima leaves and the corresponding physiological effects via foliar application.Crossref | GoogleScholarGoogle Scholar | 28693496PubMed |

Hulkoti NI, Taranath TC (2014) Biosynthesis of nanoparticles using microbes—a review. Colloids and Surfaces B: Biointerfaces 121, 474–483.
Biosynthesis of nanoparticles using microbes—a review.Crossref | GoogleScholarGoogle Scholar | 25001188PubMed |

Iannone MF, Groppa MD, de Sousa ME, Fernández van Raap MB, Benavides MP (2016) Impact of magnetite iron oxide nanoparticles on wheat (Triticum aestivum L.) development: evaluation of oxidative damage. Environmental and Experimental Botany 131, 77–88.
Impact of magnetite iron oxide nanoparticles on wheat (Triticum aestivum L.) development: evaluation of oxidative damage.Crossref | GoogleScholarGoogle Scholar |

Iravani S, Korbekandi H, Mirmohammadi SV, Zolfaghari B (2014) Synthesis of silver nanoparticles: chemical, physical and biological methods. Research in Pharmaceutical Sciences 9, 385–406.

Janaki AC, Sailatha E, Gunasekaran S (2015) Synthesis, characteristics and antimicrobial activity of ZnO nanoparticles. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 144, 17–22.
Synthesis, characteristics and antimicrobial activity of ZnO nanoparticles.Crossref | GoogleScholarGoogle Scholar |

Kasote DM, Lee JHJ, Jayaprakasha GK, Patil BS (2019) Seed priming with iron oxide nanoparticles modulate antioxidant potential and defense-linked hormones in watermelon seedlings. ACS Sustainable Chemistry & Engineering 7, 5142–5151.

Khan M, Fuller M, Baloch F (2008) Effect of soil applied zinc sulphate on wheat (Triticum aestivum L.) grown on a calcareous soil in Pakistan. Cereal Research Communications 36, 571–582.

Khodakovskaya MV, de Silva K, Nedosekin DA, Dervishi E, Biris AS, Shashkov EV, Galanzha EI, Zharov VP (2011) Complex genetic, photothermal, and photoacoustic analysis of nanoparticle-plant interactions. Proceedings of the National Academy of Sciences of the United States of America 108, 1028–1033.
Complex genetic, photothermal, and photoacoustic analysis of nanoparticle-plant interactions.Crossref | GoogleScholarGoogle Scholar | 21189303PubMed |

Khodashenas B, Ghorbani HR (2014) Synthesis of copper nanoparticles: an overview of the various methods. Korean Journal of Chemical Engineering 31, 1105–1109.
Synthesis of copper nanoparticles: an overview of the various methods.Crossref | GoogleScholarGoogle Scholar |

Konate A, He X, Zhang Z, Ma Y, Zhang P, Alugongo GM, Rui Y (2017) Magnetic (Fe3O4) nanoparticles reduce heavy metals uptake and mitigate their toxicity in wheat seedling. Sustainability 9, 790
Magnetic (Fe3O4) nanoparticles reduce heavy metals uptake and mitigate their toxicity in wheat seedling.Crossref | GoogleScholarGoogle Scholar |

Kumar D, Patel KP, Ramani VP, Shukla AK, Meena RS (2020) Management of micronutrients in soil for the nutritional security. In ‘Nutrient dynamics for sustainable crop production’. pp. 103–134.

Kurepa J, Paunesku T, Vogt S, Arora H, Rabatic BM, Lu J, Wanzer MB, Woloschak GE, Smalle JA (2010) Uptake and distribution of ultrasmall anatase TiO2 Alizarin red S nanoconjugates in Arabidopsis thaliana. Nano Letters 10, 2296–2302.
Uptake and distribution of ultrasmall anatase TiO2 Alizarin red S nanoconjugates in Arabidopsis thaliana.Crossref | GoogleScholarGoogle Scholar | 20218662PubMed |

Lee SM, Raja PM V, Esquenazi GL, Barron AR (2018) Effect of raw and purified carbon nanotubes and iron oxide nanoparticles on the growth of wheatgrass prepared from the cotyledons of common wheat (Triticum aestivum). Environmental Science: Nano 5, 103–114.
Effect of raw and purified carbon nanotubes and iron oxide nanoparticles on the growth of wheatgrass prepared from the cotyledons of common wheat (Triticum aestivum).Crossref | GoogleScholarGoogle Scholar |

Lemraski MG, Normohamadi G, Madani H, Abad HHS, Mobasser HR (2017) Two Iranian rice cultivars’ response to nitrogen and nano-fertilizer. Open Journal of Ecology 7, 591–603.
Two Iranian rice cultivars’ response to nitrogen and nano-fertilizer.Crossref | GoogleScholarGoogle Scholar |

Lesniak A, Fenaroli F, Monopoli MP, Åberg C, Dawson KA, Salvati A (2012) Effects of the presence or absence of a protein corona on silica nanoparticle uptake and impact on cells. ACS Nano 6, 5845–5857.
Effects of the presence or absence of a protein corona on silica nanoparticle uptake and impact on cells.Crossref | GoogleScholarGoogle Scholar | 22721453PubMed |

Li J, Chang PR, Huang J, Wang Y, Yuan H, Ren H (2013) Physiological effects of magnetic iron oxide nanoparticles towards watermelon. Journal of Nanoscience and Nanotechnology 13, 5561–5567.
Physiological effects of magnetic iron oxide nanoparticles towards watermelon.Crossref | GoogleScholarGoogle Scholar | 23882795PubMed |

Li J, Hu J, Ma C, Wang Y, Wu C, Huang J, Xing B (2016) Uptake, translocation and physiological effects of magnetic iron oxide (γ-Fe2O3) nanoparticles in corn (Zea mays L.). Chemosphere 159, 326–334.
Uptake, translocation and physiological effects of magnetic iron oxide (γ-Fe2O3) nanoparticles in corn (Zea mays L.).Crossref | GoogleScholarGoogle Scholar | 27314633PubMed |

Lin S, Reppert J, Hu Q, Hudson JS, Reid ML, Ratnikova TA, Rao AM, Luo H, Ke PC (2009) Uptake, translocation, and transmission of carbon nanomaterials in rice plants. Small 5, 1128–1132.
Uptake, translocation, and transmission of carbon nanomaterials in rice plants.Crossref | GoogleScholarGoogle Scholar | 19235197PubMed |

Ludwig Y, Slamet-Loedin IH (2019) Genetic biofortification to enrich rice and wheat grain iron: from genes to product. Frontiers in Plant Science 10, 833
Genetic biofortification to enrich rice and wheat grain iron: from genes to product.Crossref | GoogleScholarGoogle Scholar | 31379889PubMed |

Lv J, Zhang S, Luo L, Zhang J, Yang K, Christie P (2015) Accumulation, speciation and uptake pathway of ZnO nanoparticles in maize. Environmental Science: Nano 2, 68–77.
Accumulation, speciation and uptake pathway of ZnO nanoparticles in maize.Crossref | GoogleScholarGoogle Scholar |

Mathpal B, Srivastava PC, Shankhdhar D, Shankhdhar SC (2015) Zinc enrichment in wheat genotypes under various methods of zinc application. Plant, Soil and Environment 61, 171–175.

Matres JM, Arcillas E, Cueto-Reaño MF, Sallan-Gonzales R, Trijatmiko KR, Slamet-Loedin I (2021) Biofortification of rice grains for increased iron content. In ‘Rice improvement. Vol. 471’. (Eds J Ali, SH Wani) (Springer)

Melash AA, Mengistu DK, Aberra DA (2016) Linking agriculture with health through genetic and agronomic biofortification. Agricultural Sciences 7, 295–307.

Mahender A, Swamy BPM, Anandan A, Ali J (2019) Tolerance of iron-deficient and toxic soil conditions in rice. Plants 8, 31
Tolerance of iron-deficient and toxic soil conditions in rice.Crossref | GoogleScholarGoogle Scholar |

Mir S, Sirousmehr A, Shirmohammadi E (2015) Effect of nano and biological fertilizers on carbohydrate and chlorophyll content of forage sorghum (Speedfeed hybrid). International Journal of Biosciences 6, 157–164.
Effect of nano and biological fertilizers on carbohydrate and chlorophyll content of forage sorghum (Speedfeed hybrid).Crossref | GoogleScholarGoogle Scholar |

Miralles P, Johnson E, Church TL, Harris AT (2012) Multiwalled carbon nanotubes in alfalfa and wheat: toxicology and uptake. Journal of the Royal Society Interface 9, 3514–3527.
Multiwalled carbon nanotubes in alfalfa and wheat: toxicology and uptake.Crossref | GoogleScholarGoogle Scholar |

Murgia I, Arosio P, Tarantino D, Soave C (2012) Biofortification for combating ‘hidden hunger’ for iron. Trends in plant science 17, 47–55.

Moghadam A, Vattani H, Baghaei N, Keshavarz N (2012) Effect of different levels of fertilizer nano-iron chelates on growth and yield characteristics of two varieties of spinach (‘Spinacia oleracea’ L.): Varamin 88 and Viroflay. Research Journal of Applied Sciences, Engineering and Technology 4, 4813–4818.

Nair RR, Blake P, Grigorenko AN, Novoselov KS, Booth TJ, Stauber T, Peres NMR, Geim AK (2008) Fine structure constant defines visual transparency of graphene. Science 320, 1308
Fine structure constant defines visual transparency of graphene.Crossref | GoogleScholarGoogle Scholar | 18388259PubMed |

Nel A, Xia T, Mädler L, Li N (2006) Toxic potential of materials at the nanolevel. Science 311, 622–627.
Toxic potential of materials at the nanolevel.Crossref | GoogleScholarGoogle Scholar | 16456071PubMed |

Palchoudhury S, Jungjohann KL, Weerasena L, Arabshahi A, Gharge U, Albattah A, Miller J, Patel K, Holler RA (2018) Enhanced legume root growth with pre-soaking in α-Fe2O3 nanoparticle fertilizer. RSC Advances 8, 24075–24083.
Enhanced legume root growth with pre-soaking in α-Fe2O3 nanoparticle fertilizer.Crossref | GoogleScholarGoogle Scholar |

Palmqvist NGM, Seisenbaeva GA, Svedlindh P, Kessler VG (2017) Maghemite nanoparticles acts as nanozymes, improving growth and abiotic stress tolerance in Brassica napus. Nanoscale Research Letters 12, 631
Maghemite nanoparticles acts as nanozymes, improving growth and abiotic stress tolerance in Brassica napus.Crossref | GoogleScholarGoogle Scholar | 29260423PubMed |

Palocci C, Valletta A, Chronopoulou L, Donati L, Bramosanti M, Brasili E, Baldan B, Pasqua G (2017) Endocytic pathways involved in PLGA nanoparticle uptake by grapevine cells and role of cell wall and membrane in size selection. Plant Cell Reports 36, 1917–1928.
Endocytic pathways involved in PLGA nanoparticle uptake by grapevine cells and role of cell wall and membrane in size selection.Crossref | GoogleScholarGoogle Scholar | 28913707PubMed |

Pantidos N (2014) Biological synthesis of metallic nanoparticles by bacteria, fungi and plants. Journal of Nanomedicine and Nanotechnology 5, 5
Biological synthesis of metallic nanoparticles by bacteria, fungi and plants.Crossref | GoogleScholarGoogle Scholar |

Pariona N, Martinez AI, Hdz-García HM, Cruz LA, Hernandez-Valdes A (2017) Effects of hematite and ferrihydrite nanoparticles on germination and growth of maize seedlings. Saudi Journal of Biological Sciences 24, 1547–1554.
Effects of hematite and ferrihydrite nanoparticles on germination and growth of maize seedlings.Crossref | GoogleScholarGoogle Scholar | 30294224PubMed |

Pérez-Labrada F, Benavides-Mendoza A, Juárez-Maldonado A, Solís-Gaona S, González-Morales S (2020) Organic acids combined with Fe-chelate improves ferric nutrition in tomato grown in calcisol soil. Journal of Soil Science and Plant Nutrition 20, 673–683.
Organic acids combined with Fe-chelate improves ferric nutrition in tomato grown in calcisol soil.Crossref | GoogleScholarGoogle Scholar |

Phattarakul N, Rerkasem B, Li LJ, Wu LH, Zou CQ, Ram H, Sohu VS, Kang BS, Surek H, Kalayci M (2012) Biofortification of rice grain with zinc through zinc fertilization in different countries. Plant and Soil 361, 131–141.

Peyvandi M, Parande H, Mirza M (2011) Comparison of nano Fe chelate with Fe chelate effect on growth parameters and antioxidant enzymes activity of Ocimum basilicum. New Cellular & Molecular Biotechnology Journal 4, 89–98.

Pokhrel LR, Dubey B (2013) Evaluation of developmental responses of two crop plants exposed to silver and zinc oxide nanoparticles. Science of the Total Environment 452–453, 321–332.
Evaluation of developmental responses of two crop plants exposed to silver and zinc oxide nanoparticles.Crossref | GoogleScholarGoogle Scholar |

Pradhan S, Mailapalli DR (2017) Interaction of engineered nanoparticles with the agri-environment. Journal of Agricultural and Food Chemistry 65, 8279–8294.
Interaction of engineered nanoparticles with the agri-environment.Crossref | GoogleScholarGoogle Scholar | 28876911PubMed |

Prasad R, Shivay YS, Kumar D (2013) Zinc fertilization of cereals for increased production and alleviation of zinc malnutrition in India. Agricultural Research 2, 111–118.

Prasad R, Shivay YS, Kumar D (2014) Agronomic biofortification of cereal grains with iron and zinc. Advances in Agronomy 125, 55–91.

Prerna DI, Govindaraju K, Tamilselvan S, Kannan M, Vasantharaja R, Chaturvedi S, Shkolnik D (2021) Influence of nanoscale micro-nutrient α-Fe2O3 on seed germination, seedling growth, translocation, physiological effects and yield of rice (Oryza sativa) and maize (Zea mays). Plant Physiology and Biochemistry 162, 564–580.
Influence of nanoscale micro-nutrient α-Fe2O3 on seed germination, seedling growth, translocation, physiological effects and yield of rice (Oryza sativa) and maize (Zea mays).Crossref | GoogleScholarGoogle Scholar | 33773232PubMed |

Racuciu M (2012) Iron oxide nanoparticles coated with β-cyclodextrin polluted of Zea mays plantlets. Nanotechnology Development 2, e6
Iron oxide nanoparticles coated with β-cyclodextrin polluted of Zea mays plantlets.Crossref | GoogleScholarGoogle Scholar |

Raliya R, Nair R, Chavalmane S, Wang W-N, Biswas P (2015) Mechanistic evaluation of translocation and physiological impact of titanium dioxide and zinc oxide nanoparticles on the tomato (Solanum lycopersicum L.) plant. Metallomics 7, 1584–1594.
Mechanistic evaluation of translocation and physiological impact of titanium dioxide and zinc oxide nanoparticles on the tomato (Solanum lycopersicum L.) plant.Crossref | GoogleScholarGoogle Scholar | 26463441PubMed |

Raliya R, Franke C, Chavalmane S, Nair R, Reed N, Biswas P (2016) Quantitative understanding of nanoparticle uptake in watermelon plants. Frontiers in Plant Science 7, 1288
Quantitative understanding of nanoparticle uptake in watermelon plants.Crossref | GoogleScholarGoogle Scholar | 27617020PubMed |

Raliya R, Saharan V, Dimkpa C, Biswas P (2018) Nanofertilizer for precision and sustainable agriculture: current state and future perspectives. Journal of Agricultural and Food Chemistry 66, 6487–6503.
Nanofertilizer for precision and sustainable agriculture: current state and future perspectives.Crossref | GoogleScholarGoogle Scholar | 28835103PubMed |

Rizwan M, Ali S, Ali B, Adrees M, Arshad M, Hussain A, Zia ur Rehman M, Waris AA (2019) Zinc and iron oxide nanoparticles improved the plant growth and reduced the oxidative stress and cadmium concentration in wheat. Chemosphere 214, 269–277.

Rong W, Pelling AE, Ryan A, Gimzewski JK, Friedlander SK (2004) Complementary TEM and AFM force spectroscopy to characterize the nanomechanical properties of nanoparticle chain aggregates. Nano Letters 4, 2287–2292.
Complementary TEM and AFM force spectroscopy to characterize the nanomechanical properties of nanoparticle chain aggregates.Crossref | GoogleScholarGoogle Scholar |

Rong , Ding W, Mädler L, Ruoff RS, Friedlander SK (2006) Mechanical properties of nanoparticle chain aggregates by combined AFM and SEM: isolated aggregates and networks. Nano Letters 6, 2646–2655.
Mechanical properties of nanoparticle chain aggregates by combined AFM and SEM: isolated aggregates and networks.Crossref | GoogleScholarGoogle Scholar | 17163682PubMed |

Rostamizadeh E, Iranbakhsh A, Majd A, Arbabian S, Mehregan I (2021) Physiological and molecular responses of wheat following the foliar application of iron oxide nanoparticles. International Journal of Nano Dimension 12, 128–134.

Rui M, Ma C, Hao Y, Guo J, Rui Y, Tang X, Zhao Q, Fan X, Zhang Z, Hou T, Zhu S (2016) Iron oxide nanoparticles as a potential iron fertilizer for peanut (Arachis hypogaea). Frontiers in Plant Science 7, 815
Iron oxide nanoparticles as a potential iron fertilizer for peanut (Arachis hypogaea).Crossref | GoogleScholarGoogle Scholar | 27375665PubMed |

Salehi H, Chehregani A, Lucini L, Majd A, Gholami M (2018) Morphological, proteomic and metabolomic insight into the effect of cerium dioxide nanoparticles to Phaseolus vulgaris L. under soil or foliar application. Science of the Total Environment 616, 1540–1551.

Sanzari I, Leone A, Ambrosone A (2019) Nanotechnology in plant science: to make a long story short. Frontiers in Bioengineering and Biotechnology 7, 120
Nanotechnology in plant science: to make a long story short.Crossref | GoogleScholarGoogle Scholar | 31192203PubMed |

Sheykhbaglou R, Sedghi M, Shishevan MT, Sharifi RS (2010) Effects of nano-iron oxide particles on agronomic traits of soybean. Notulae Scientia Biologicae 2, 112–113.
Effects of nano-iron oxide particles on agronomic traits of soybean.Crossref | GoogleScholarGoogle Scholar |

Srivastava G, Das CK, Das A, Singh SK, Roy M, Kim H, Sethy N, Kumar A, Sharma RK, Singh SK (2014) Seed treatment with iron pyrite (FeS2) nanoparticles increases the production of spinach. RSC Adv 4, 58495–58504.

Solanki P, Bhargava A, Chhipa H, Jain N, Panwar J (2015) Nano-Fertilizers and their smart delivery system. In ‘Nanotechnologies in food agriculture’. pp. 81–101. (Springer)

Stoltzfus RJ, Mullany L, Black RE (2004) Iron deficiency anaemia. In ‘Comparative quantification of health risks: global and regional burden of disease attributable to selected major risk factors. Vol. 1’. (Eds M Ezzati, AD Lopez, A Rodgers, CJL Murray) pp. 163–209. (WHO)

Sundaria N, Singh M, Upreti P, Chauhan RP, Jaiswal JP, Kumar A (2019) Seed priming with Iron oxide nanoparticles triggers Iron acquisition and biofortification in wheat (Triticum aestivum L.) grains. Journal of Plant Growth Regulation 38, 122–131.
Seed priming with Iron oxide nanoparticles triggers Iron acquisition and biofortification in wheat (Triticum aestivum L.) grains.Crossref | GoogleScholarGoogle Scholar |

Tam E, Keats EC, Rind F, Das JK, Bhutta ZA (2020) Micronutrient supplementation and fortification interventions on health and development outcomes among children under-five in low-and middle-income countries: a systematic review and meta-analysis. Nutrients 12, 289
Micronutrient supplementation and fortification interventions on health and development outcomes among children under-five in low-and middle-income countries: a systematic review and meta-analysis.Crossref | GoogleScholarGoogle Scholar |

Thanh NTK, Maclean N, Mahiddine S (2014) Mechanisms of nucleation and growth of nanoparticles in solution. Chemical Reviews 114, 7610–7630.
Mechanisms of nucleation and growth of nanoparticles in solution.Crossref | GoogleScholarGoogle Scholar |

Tombuloglu H, Tombuloglu G, Slimani Y, Ercan I, Sozeri H, Baykal A (2018) Impact of manganese ferrite (MnFe2O4) nanoparticles on growth and magnetic character of barley (Hordeum vulgare L.). Environmental Pollution 243, 872–881.
Impact of manganese ferrite (MnFe2O4) nanoparticles on growth and magnetic character of barley (Hordeum vulgare L.).Crossref | GoogleScholarGoogle Scholar | 30245449PubMed |

Tombuloglu H, Slimani Y, Tombuloglu G, Almessiere M, Baykal A (2019a) Uptake and translocation of magnetite (Fe3O4) nanoparticles and its impact on photosynthetic genes in barley (Hordeum vulgare L.). Chemosphere 226, 110–122.
Uptake and translocation of magnetite (Fe3O4) nanoparticles and its impact on photosynthetic genes in barley (Hordeum vulgare L.).Crossref | GoogleScholarGoogle Scholar | 30925403PubMed |

Tombuloglu H, Slimani Y, Tombuloglu G, Almessiere M, Baykal A, Ercan I, Sozeri H (2019b) Tracking of NiFe2O4 nanoparticles in barley (Hordeum vulgare L.) and their impact on plant growth, biomass, pigmentation, catalase activity, and mineral uptake. Environmental Nanotechnology, Monitoring and Management 11, 100223
Tracking of NiFe2O4 nanoparticles in barley (Hordeum vulgare L.) and their impact on plant growth, biomass, pigmentation, catalase activity, and mineral uptake.Crossref | GoogleScholarGoogle Scholar |

Tombuloglu H, Slimani Y, Tombuloglu G, Almessiere M, Sozeri H, Demir-Korkmaz A, AlShammari TM, Baykal A, Ercan I, Hakeem KR (2019c) Impact of calcium and magnesium substituted strontium nano-hexaferrite on mineral uptake, magnetic character, and physiology of barley (Hordeum vulgare L.). Ecotoxicology and Environmental Safety 186, 109751
Impact of calcium and magnesium substituted strontium nano-hexaferrite on mineral uptake, magnetic character, and physiology of barley (Hordeum vulgare L.).Crossref | GoogleScholarGoogle Scholar | 31600650PubMed |

Trumbo P, Yates AA, Schlicker S, Poos M (2001) Dietary reference intakes: vitamin A, vitamin K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium, and zinc. Journal of the American Dietetic Association 101, 294–301.
Dietary reference intakes: vitamin A, vitamin K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium, and zinc.Crossref | GoogleScholarGoogle Scholar | 11269606PubMed |

Velu G, Ortiz-Monasterio I, Cakmak I, Hao Y, Singh R, áP (2014) Biofortification strategies to increase grain zinc and iron concentrations in wheat. Journal of Cereal Science 59, 365–372.

Wang H, Kou X, Pei Z, Xiao JQ, Shan X, Xing B (2011) Physiological effects of magnetite (Fe3O4) nanoparticles on perennial ryegrass (Lolium perenne L.) and pumpkin (Cucurbita mixta) plants. Nanotoxicology 5, 30–42.
Physiological effects of magnetite (Fe3O4) nanoparticles on perennial ryegrass (Lolium perenne L.) and pumpkin (Cucurbita mixta) plants.Crossref | GoogleScholarGoogle Scholar | 21417686PubMed |

Wang F, Yu L, Monopoli MP, Sandin P, Mahon E, Salvati A, Dawson KA (2013) The biomolecular corona is retained during nanoparticle uptake and protects the cells from the damage induced by cationic nanoparticles until degraded in the lysosomes. Nanomedicine: Nanotechnology, Biology and Medicine 9, 1159–1168.

Wei Y, Shohag MJI, Yang X, Yibin Z (2012) Effects of foliar iron application on iron concentration in polished rice grain and its bioavailability. Journal of Agricultural and Food Chemistry 60, 11433–11439.

White PJ, Broadley MR (2009) Biofortification of crops with seven mineral elements often lacking in human diets – iron, zinc, copper, calcium, magnesium, selenium and iodine. New Phytologist 182, 49–84.

Wiley B, Herricks T, Sun Y, Xia Y (2004) Polyol synthesis of silver nanoparticles: use of chloride and oxygen to promote the formation of single-crystal, truncated cubes and tetrahedrons. Nano Letters 4, 1733–1739.
Polyol synthesis of silver nanoparticles: use of chloride and oxygen to promote the formation of single-crystal, truncated cubes and tetrahedrons.Crossref | GoogleScholarGoogle Scholar |

Wu W, He Q, Jiang C (2008) Magnetic iron oxide nanoparticles: synthesis and surface functionalization strategies. Nanoscale Research Letters 3, 397
Magnetic iron oxide nanoparticles: synthesis and surface functionalization strategies.Crossref | GoogleScholarGoogle Scholar | 21749733PubMed |

Yang Z, Chen J, Dou R, Gao X, Mao C, Wang L (2015) Assessment of the phytotoxicity of metal oxide nanoparticles on two crop plants, maize (Zea mays L.) and rice (Oryza sativa L.). International Journal of Environmental Research and Public Health 12, 15100–15109.
Assessment of the phytotoxicity of metal oxide nanoparticles on two crop plants, maize (Zea mays L.) and rice (Oryza sativa L.).Crossref | GoogleScholarGoogle Scholar | 26633437PubMed |

Yasmeen F, Raja NI, Razzaq A, Komatsu S (2017) Proteomic and physiological analyses of wheat seeds exposed to copper and iron nanoparticles. Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics 1865, 28–42.
Proteomic and physiological analyses of wheat seeds exposed to copper and iron nanoparticles.Crossref | GoogleScholarGoogle Scholar |

Yilmaz A, Ekiz H, Torun B, Gultekin I, Karanlik S, Bagci SA, Cakmak I (1997) Effect of different zinc application methods on grain yield and zinc concentration in wheat cultivars grown on zinc-deficient calcareous soils. Journal of Plant Nutrition 20, 461–471.

Zahra Z, Arshad M, Rafique R, Mahmood A, Habib A, Qazi IA, Khan SA (2015) Metallic nanoparticle (TiO2 and Fe3O4) application modifies rhizosphere phosphorus availability and uptake by Lactuca sativa. Journal of Agricultural and Food Chemistry 63, 6876–6882.
Metallic nanoparticle (TiO2 and Fe3O4) application modifies rhizosphere phosphorus availability and uptake by Lactuca sativa.Crossref | GoogleScholarGoogle Scholar | 26194089PubMed |

Zhai G, Walters KS, Peate DW, Alvarez PJJ, Schnoor JL (2014) Transport of gold nanoparticles through plasmodesmata and precipitation of gold ions in woody poplar. Environmental Science and Technology Letters 1, 146–151.
Transport of gold nanoparticles through plasmodesmata and precipitation of gold ions in woody poplar.Crossref | GoogleScholarGoogle Scholar | 25386566PubMed |

Zhang T, Sun H, Lv Z, Cui L, Mao H, Kopittke PM (2018) Using synchrotron-based approaches to examine the foliar application of ZnSO4 and ZnO nanoparticles for field-grown winter wheat. Journal of Agricultural and Food Chemistry 66, 2572–2579.
Using synchrotron-based approaches to examine the foliar application of ZnSO4 and ZnO nanoparticles for field-grown winter wheat.Crossref | GoogleScholarGoogle Scholar | 29091444PubMed |

Zhang Y, Shi R, Rezaul KM, Zhang F, Zou C (2010) Iron and zinc concentrations in grain and flour of winter wheat as affected by foliar application. Journal of Agricultural and Food Chemistry 58, 12268–12274.

Zhao L, Hu Q, Huang Y, Keller AA (2017) Response at genetic, metabolic, and physiological levels of maize (Zea mays) exposed to a Cu(OH)2 nanopesticide. ACS Sustainable Chemistry and Engineering 5, 8294–8301.
Response at genetic, metabolic, and physiological levels of maize (Zea mays) exposed to a Cu(OH)2 nanopesticide.Crossref | GoogleScholarGoogle Scholar |

Zhu H, Han J, Xiao JQ, Jin Y (2008) Uptake, translocation, and accumulation of manufactured iron oxide nanoparticles by pumpkin plants. Journal of Environmental Monitoring 10, 713–717.
Uptake, translocation, and accumulation of manufactured iron oxide nanoparticles by pumpkin plants.Crossref | GoogleScholarGoogle Scholar | 18528537PubMed |

Zimbovskaya MM, Polyakov AY, Volkov DS, Kulikova NA, Lebedev VA, Pankratov DA, Konstantinov AI, Parfenova AM, Zhilkibaev O, Perminova IV (2020) Foliar application of humic-stabilized nanoferrihydrite resulted in an increase in the content of iron in wheat leaves. Agronomy 10, 1891