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 Academic Research Journal of Agricultural Science and Research
 

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Academic Research Journal of Agricultural Science and Research 

Vol. 3(6), pp. 151-160. June, 2015.

ISSN: 2360-7874 

 DOI: 10.14662/ARJASR2015.036

 

Full Length Research

Adaptations and Mechanisms of Heat Stress Tolerance of Plants

 

A. K. Trivedi

 

ICAR-National Bureau of Plant Genetic Resources, Regional Station Bhowali, Nainital (Uttarakhand) 263132

E-mail: ajayakumartrivedi@gmail.com

 

Accepted 19 May 2015

Abstract

 

Heat stress is one of the major abiotic factor limiting production and productivity of crops in several regions round the world. In spite of variation in susceptibility of different stages to heat stress, almost all stages of plant life are affected by heat stress. The developmental stage at which the plant is exposed to the stress may determine the severity of possible damages experienced by the crop. During heat stress modifications in different plant processes takes place in such a way to minimize the effect and develop tolerance to sustain stressful environment. A key adaptive mechanism in many plants grown under heat stress is an accumulation of certain organic compounds of low molecular mass, generally referred to as compatible osmolytes. Osmolytes help in heat stress tolerance. The heat stress response is characterized by inhibition of normal transcription and translation, an enhanced expression of heat shock proteins (HSPs) and induction of thermo tolerance. Expression of heat shock proteins (HSPs) is known to be an important adaptive strategy. Secondary metabolites, antioxidants as well as antioxidant enzymes play crucial role in heat stress tolerance. Their expression varies in different species as well as in different cultivars of same species. Plant genetic resources having maximum yield in normal condition and performing better in heat stress condition are suitable for cultivation in heat stress condition.

Keywords: Heat stress, osmolytes, secondary metabolites, antioxidants, photosynthesis, tolerance

 

How to cite this article: Trivedi AK (2015). Adaptations and Mechanisms of Heat Stress Tolerance of Plants. Acad. Res. J. Agri. Sci. Res. 3(6):151-160. 

 

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Current Issue: June 2015

 

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  Vol. 3 No. 6

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