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Physiological plasticity to high temperature stress in chickpea: Adaptive responses and variable tolerance

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Title Physiological plasticity to high temperature stress in chickpea: Adaptive responses and variable tolerance
 
Creator Pareek, Akanksha
Rathi, Divya
Mishra, Divya
Chakraborty, Subhra
Chakraborty, Niranjan
 
Subject Adaptive responses
Antioxidant defense
Cool-season crops
High temperature stress
Morpho-physicochemical traits
Thermotolerance
 
Description Accepted date: 7 September 2019
High temperature stress (HTS) is one of the most crucial factors that limits plant growth and development, and reduces crop yields worldwide. Cool-season crops, particularly the legumes, are severely affected by increasing ambient temperature associated with global climate change. We characterized the HTS-induced modulations of morpho-physicochemical traits and gene expression of several chickpea genotypes and the metabolic profile of the tolerant cultivar. Higher water use efficiency and photosynthetic capacity, minimal membrane lipid peroxidation in conjunction with increased abundance of osmolytes and secondary metabolites depicted thermotolerance of ICC 1205. The adaptive responses were accompanied by high transcript abundance of heat shock proteins and antioxidant enzymes. To integrate stress-responsive signalling and metabolic networks, the HTS-induced physicochemical analysis was further extended to metabolite profiling of the thermotolerant cultivar. The screening of the metabolome landscape led to the identification of 49 HTS-responsive metabolites that include polycarboxylic acid, sugar acids, sugar alcohols and amino acids which might confer thermotolerance in chickpea. The present study, to our knowledge, is the most comprehensive of its kind in dissecting cultivar-specific differential adaptive responses to HTS in chickpea, which might potentiate the identification of genetic traits extendible to improvement of thermotolerance of crops.
This work was supported by Department of Science and Technology (DST), Govt. of India [DST/INT/South Africa/P-22/2016]. We kindly acknowledge the University Grant Commission (UGC), Govt. of India for providing predoctoral fellowship to A.P. and D.M., as well as Council of Scientific and Industrial Research (CSIR), Govt. of India for providing predoctoral fellowship to D.R. We also thank ICRISAT, Hyderabad, India for providing seeds of chickpea cultivars. We thank Mr. Jasbeer Singh for illustrations and graphical representation in the manuscript.
 
Date 2019-10-21T07:34:42Z
2019-10-21T07:34:42Z
2019
 
Type Article
 
Identifier Plant Science, 289: 110258
0168-9452
http://223.31.159.10:8080/jspui/handle/123456789/1005
https://www.sciencedirect.com/science/article/pii/S0168945219308489?via%3Dihub
https://doi.org/10.1016/j.plantsci.2019.110258
 
Language en_US
 
Format application/pdf
 
Publisher Elsevier B.V.