Drought resistance – is it really a complex trait?
Abraham Blum
+ Author Affiliations
- Author Affiliations
www.plantstress.com, PO Box 16246, Tel Aviv, Israel. Email: ablum@plantstress.com
Functional Plant Biology 38(10) 753-757 https://doi.org/10.1071/FP11101
Submitted: 26 April 2011 Accepted: 1 July 2011 Published: 16 September 2011
Abstract
Drought resistance is being increasingly labelled as being a ‘complex trait’, especially with the recent expansion of research into its genomics. There is a danger that this label may turn into an axiom that is liable to damage education on the subject as well as research and the delivery of solutions to the farmer. This opinionated review examines whether there is grounds for such an axiom. Drought resistance is labelled as a ‘complex trait’ mainly when viewed by molecular biologists from the gene discovery platform. This platform is capable of expressing hundreds and thousands of drought-responsive genes, which are up- or down-regulated under dehydration stress according to growth stage, plant organ or even time of day. Sorting out the ‘grain out of the chaff’ in order to identify the function of the candidate genes towards drought resistance is difficult and, thus, the idea that drought resistance is complex is raised. However, when drought resistance is viewed from the physiological and agronomic whole-plant and crop platform, it appears much simpler; its control, whether constitutive or adaptive, is rather obvious with respect to manipulation in breeding and crop management. The most important and common drought resistance traits function to maintain plant hydration under drought stress due to effective use of water (EUW). The state of our knowledge and the achievements in breeding for drought resistance do not support labelling drought resistance as a complex trait. The genomics road towards drought resistance is complex but we already know that the destination is much simpler.
Additional keywords: abiotic stress, drought stress, drought tolerance, gene discovery, gene expression.
References
Barker T, Campos H, Cooper M, Dolan D, Edmeades G, Habben J, Schussler J, Wright D, Zinselmeier C (2005) Improving drought tolerance in maize. Plant Breeding Reviews 25, 173–253.Bennet CH (1990) How to define complexity in physics and why. In ‘Complexity, entropy and the physics of information’. (Ed. WH Zurek) pp. 137–148. (Addison-Wesley: Redwood City, CA)
Blum A (2009) Effective use of water (EUW) and not water-use efficiency (WUE) is the target of crop yield improvement under drought stress. Field Crops Research 112, 119–123.
| Effective use of water (EUW) and not water-use efficiency (WUE) is the target of crop yield improvement under drought stress.Crossref | GoogleScholarGoogle Scholar |
Blum A (2011) ‘Plant breeding for water limited environments.’ (Springer-Verlag: New York)
Collins NC, Tardieu F, Roberto T (2008) Quantitative trait loci and crop performance under abiotic stress: where do we stand? Plant Physiology 147, 469–486.
| Quantitative trait loci and crop performance under abiotic stress: where do we stand?Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXnsVyhsbw%3D&md5=584ac9fb2187fd8df428a756c5adbe04CAS |
Davies WJ, Kudoyarova G, Hartung W (2005) Long-distance ABA signaling and its relation to other signaling pathways in the detection of soil drying and the mediation of the plant’s response to drought. Journal of Plant Growth Regulation 24, 285–295.
| Long-distance ABA signaling and its relation to other signaling pathways in the detection of soil drying and the mediation of the plant’s response to drought.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXhtlGhurbI&md5=37fcca0c874b5d3f64c67a91ca1254bfCAS |
Furbank RT (2009) Plant phenomics: from gene to form and function. Functional Plant Biology 36, v–vi.
| Plant phenomics: from gene to form and function.Crossref | GoogleScholarGoogle Scholar |
Iuchi S, Kobayashi M, Taji T, Naramoto M, Seki M, Kato T, Tabata S, Kakubari Y, Yamaguchi-Shinozaki K, Shinozaki K (2001) Regulation of drought tolerance by gene manipulation of 9-cis-epoxycarotenoid dioxygenase, a key enzyme in abscisic acid biosynthesis in Arabidopsis. The Plant Journal 27, 325–333.
| Regulation of drought tolerance by gene manipulation of 9-cis-epoxycarotenoid dioxygenase, a key enzyme in abscisic acid biosynthesis in Arabidopsis.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3MXmvFKrtLY%3D&md5=179c4d96a7c3fe279c91f97c2e928f79CAS |
Moinuddin , Fischer RA, Sayre KD, Reynolds MP (2005) Osmotic adjustment in wheat in relation to grain yield under water deficit environments. Agronomy Journal 97, 1062–1071.
Morgan JM (1991) A gene controlling differences in osmoregulation in wheat. Australian Journal of Plant Physiology 18, 249–257.
| A gene controlling differences in osmoregulation in wheat.Crossref | GoogleScholarGoogle Scholar |
Munns R, Richards RA (2007) Recent advances in breeding wheat for drought and salt stresses. In ‘Advances in molecular breeding toward drought and salt tolerant crops’. (Eds MA Jenks, PM Hasegawa, SM Jain) pp. 565–586. (Springer-Verlag: Dordrecht, the Netherlands)
Passioura J (2006) Increasing crop productivity when water is scarce – from breeding to field management. Agricultural Water Management 80, 176–196.
| Increasing crop productivity when water is scarce – from breeding to field management.Crossref | GoogleScholarGoogle Scholar |
Peleg Z, Blumwald E (2011) Hormone balance and abiotic stress tolerance in crop plants. Current Opinion in Plant Biology 14, 290–295.
Pinheiro C, Chaves MM (2011) Photosynthesis and drought: can we make metabolic connections from available data? Journal of Experimental Botany 62, 869–882.
| Photosynthesis and drought: can we make metabolic connections from available data?Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXhtVektLg%3D&md5=a5fbf61eeb1ad535fe5cc18150f33fc6CAS |
Rosenow DT, Dahlberg JA (2000) Collection, conversion, and utilisation of sorghum. In ‘Sorghum: origin, history, technology and production’. (Eds CW Smith, RA Frederiksen) pp. 309–328. (John Wiley & Sons: New York)
Rosenow DT, Quisenberry JE, Wendt CW, Clark LE (1983) Drought tolerant sorghum and cotton germplasm. Agricultural Water Management 7, 207–222.
| Drought tolerant sorghum and cotton germplasm.Crossref | GoogleScholarGoogle Scholar |
Thomas H, Smart CM (1993) Crops that stay green. Annals of Applied Biology 123, 193–219.
| Crops that stay green.Crossref | GoogleScholarGoogle Scholar |
Vaadia Y (1976) Plant hormones and water stress. Philosophical Transactions of the Royal Society London Series B 273, 513–522.
| Plant hormones and water stress.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaE28XhslKrtbw%3D&md5=8c0da685f8cde5694f70fc950e4d2f27CAS |
Varshney RK, Bansal KC, Aggarwal PK, Datta SK, Craufurd PQ (2011) Agricultural biotechnology for crop improvement in a variable climate: hope or hype? Trends in Plant Science 16, 363–371.
| Agricultural biotechnology for crop improvement in a variable climate: hope or hype?Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXos1yntrY%3D&md5=81b99f92f6160c7aca4cd7b6d9270e5fCAS |
Wang WS, Pan YJ, Zhao XQ, Dwivedi D, Zhu LH, Ali J, Fu BY, Li ZK (2011) Drought-induced site-specific DNA methylation and its association with drought tolerance in rice (Oryza sativa L.). Journal of Experimental Botany 62, 1951–1960.
| Drought-induced site-specific DNA methylation and its association with drought tolerance in rice (Oryza sativa L.).Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXjsFyisrw%3D&md5=cdab8d2d3ca1eac3bf58b6e9b42c9672CAS |
Welcker C, Boussuge B, Bencivenni C, Ribaut J-M, Tardieu F (2006) Are source and sink strengths genetically linked in maize plants subjected to water deficit? A QTL study of the responses of leaf growth and of anthesis-silking interval to water deficit. Journal of Experimental Botany 58, 339–349.
| Are source and sink strengths genetically linked in maize plants subjected to water deficit? A QTL study of the responses of leaf growth and of anthesis-silking interval to water deficit.Crossref | GoogleScholarGoogle Scholar |
Wilkins O, Bräutigam K, Campbell MM (2010) Time of day shapes Arabidopsis drought transcriptomes. The Plant Journal 63, 715–727.
| Time of day shapes Arabidopsis drought transcriptomes.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXhtF2qt7bM&md5=0c7144dd5745804178feaa1dc00283bbCAS |
Xu Y, Crouch JH (2008) Marker-assisted selection in plant breeding: from publications to practice. Crop Science 48, 391–407.
| Marker-assisted selection in plant breeding: from publications to practice.Crossref | GoogleScholarGoogle Scholar |
Yang J, Zhang J (2006) Grain filling of cereals under soil drying. New Phytologist 169, 223–236.
| Grain filling of cereals under soil drying.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD28XhtlKntL8%3D&md5=020e635407a2be258661559d421d722aCAS |
Yu SB, Li JX, Xu CG, Tan YF, Li X, Zhang Q (2002) Identification of quantitative trait loci and epistatic interactions for plant height and heading date in rice. Theoretical and Applied Genetics 104, 619–625.
Zhang K, Tian J, Zhao L, Wang S (2008) Mapping QTLs with epistatic effects and QTL × environment interactions for plant height using a doubled haploid population in cultivated wheat. Journal of Genetics and Genomics 35, 119–127.
| Mapping QTLs with epistatic effects and QTL × environment interactions for plant height using a doubled haploid population in cultivated wheat.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXjs1ars7Y%3D&md5=ae3ba2eb7f67c95bb0da20f3f3645c8cCAS |
Zhou J, Wang X, Jiao Y, Qin Y, Liu X, He K, Chen C, Ma L, Wang J, Xiong L, Zhang Q, Fan L, Deng WX (2007) Global genome expression analysis of rice in response to drought and high-salinity stresses in shoot, flag leaf, and panicle. Plant Molecular Biology 63, 591–608.
| Global genome expression analysis of rice in response to drought and high-salinity stresses in shoot, flag leaf, and panicle.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXitFKmsbw%3D&md5=d4c9c27d5075168a5bfbf37d1ffdb758CAS |
Peleg Z, Blumwald E (2011) Hormone balance and abiotic stress tolerance in crop plants. Current Opinion in Plant Biology 14, 290–295.
| Hormone balance and abiotic stress tolerance in crop plants.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXnt1KmsLo%3D&md5=f20b5d8d1a231b4cb69266e90427f74cCAS |
