Silicon and zinc nanoparticles-enriched miscanthus biochar enhanced seed germination, antioxidant defense system, and nutrient status of radish under NaCl stress
Zuhha Taqdees A , Javairia Khan A , Waqas-ud-Din Khan
A B * , Salma Kausar C , Muhammad Afzaal A and Imran Akhtar D
+ Author Affiliations
- Author Affiliations
A Sustainable Development Study Centre, Government College University, Lahore, Pakistan.
B Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS, Australia.
C Soil and Water Testing Laboratory, Lodhran, 59320, Pakistan.
D Entomology Section, Regional Agricultural Research Institute, Bahawalpur, 63100, Pakistan.
Crop & Pasture Science 73(5) 556-572 https://doi.org/10.1071/CP21342
Submitted: 18 May 2021 Accepted: 27 September 2021 Published: 24 February 2022
© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing
Abstract
Context: Soil salinity mitigation with nanoparticles enriched biochar (Bc) can be a better strategy to resolve the uprising threat against food security.
Aim: The present study was designed to prepare silicon nanoparticles enriched biochar (Si-En-Bc) and zinc nanoparticles enriched biochar (Zn-En-Bc), which may not only reduced the toxic effects of NaCl stress on initial growth of radish crop but also improved its physiology and defensive mechanism.
Method: Seeds were germinated in pots with six treatments under normal and NaCl stress, (100 mM NaCl), Zn-En-Bc (1% w/w), and Si-En-Bc (1% w/w). Twenty days old seedlings were harvested and their fresh weight and various germination and biochemical parameters were tested.
Key results: A significant reduction in malondialdehyde (MDA) and hydrogen peroxide (H2O2) contents was observed with Si-En-Bc + NaCl relative to NaCl stress. It might be due to the significant increase in the antioxidants such as superoxide dismutase (SOD) (42%), ascorbate peroxidase (APX) (38.7%), catalase (CAT) (30.9%) and shoot phenolics (59%) with Si-En-Bc + NaCl over NaCl stress. Application of Zn-En-Bc also caused a maximum increase in root and shoot Zn concentration (76.8 and 54.9%, respectively) under NaCl stress.
Conclusions: Hence, Si-En-Bc proved to be the best treatment for the radish plant to complete its early growth stage under NaCl stress while Zn-En-Bc not only compensated NaCl stress but also enhanced Zn availability.
Implications: This study implies that Si-En-Bc or Zn-En-Bc should be applied to the salt affected soil before the crop sowing so seedling can grow under the ameliorative effects of applied amendments. Also, Si-En-Bc or Zn-En-Bc should be tested on a degraded soils at larage scale such as field level.
Keywords: antioxidant, biochar, mineral nutrition, NaCl stress, nanoparticles enriched biochar, phenolics, protein, radish, vitality index.
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