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Drought tolerance in Triticum aestivum L. genotypes associated with enhanced antioxidative protection and declined lipid peroxidation

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Abstract

Drought is one of the major constraints in wheat production and causes a huge loss at grain-filling stage. In this study we highlighted the response of different wheat genotypes under drought stress at the grain-filling stage. Field experiments were conducted to evaluate 72 wheat (Triticum aestivum L.) genotypes under two water regimes: irrigated and drought condition. Four wheat genotypes, two each of drought tolerant (IC36761A, IC128335) and drought-susceptible category (IC335732 and IC138852) were selected on the basis of agronomic traits and drought susceptibility index (DSI), to understand their morphological, biochemical and molecular basis of drought stress tolerance. Among agronomic traits, productive tillers followed by biomass had high percent reduction under drought stress, thus drought stress had a great impact. Antioxidant activity (AO), total phenolic and proline content were found to be significantly higher in IC128335 genotype. Differential expression pattern of transcription factors of ten genes revealed that transcription factor qTaWRKY2 followed by qTaDREB, qTaEXPB23 and qTaAPEX might be utilized for developing wheat varieties resistant to drought stress. Understanding the role of TFs would be helpful to decipher the molecular mechanism involved in drought stress. Identified genotypes (IC128335 and IC36761A) may be useful as parental material for future breeding program to generate new drought-tolerant varieties.

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Acknowledgements

The authors acknowledge Director, ICAR-National Bureau of Plant Genetic Resources (ICAR-NBPGR) New Delhi, for the facilities and support provided to carry out the research work. Sincerely acknowledge the ICAR-Indian Institute of Wheat and Barley Research (ICAR-IIWBR) Karnal-Haryana, for providing wheat germplasm, and Dr. J.C.P for providing Laboratory space to carryout gene expression analysis, NIPB-New Delhi.

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SK, DU and NC conceived and designed the research. DU has performed all the experiments and wrote the manuscript. SK, SS, DU, AKS, RB and JK contributed in data analysis. NB and DU has contributed in bioinformatics analysis. JCP contributed in gene expression analysis. SK, JCP, SS, NB and JK contributed in manuscript proofreading. All authors read and approved the manuscript.

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Correspondence to Deepali Upadhyay.

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On behalf of all authors, the corresponding author states that there is no conflict of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Upadhyay, D., Budhlakoti, N., Singh, A.K. et al. Drought tolerance in Triticum aestivum L. genotypes associated with enhanced antioxidative protection and declined lipid peroxidation. 3 Biotech 10, 281 (2020). https://doi.org/10.1007/s13205-020-02264-8

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  • DOI: https://doi.org/10.1007/s13205-020-02264-8

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