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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(7), pp. 151-160. July, 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
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. How to cite this article: Trivedi AK (2015). Adaptations and Mechanisms of Heat Stress Tolerance of Plants. Acad. Res. J. Agri. Sci. Res. 3(7):151-160.
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