TITLE:
Physiological Evaluation of Wheat (Triticum aestivum L.) Genotypes at Pre-Anthesis Stage under Heat Stress Conditions
AUTHORS:
Munazza Nazir, Asghari Bano, Faizan Ullah, Samiullah Khan, Naeem Khan
KEYWORDS:
Heat Stress, Tolerance Mechanisms, Protein Profiling, Osmolytes
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.12 No.12,
December
13,
2021
ABSTRACT: Experiments were conducted to analyze effects of
high temperature stress on wheat at pre-anthesis growth stage. Twenty four
wheat genotypes exposed to a sub optimal temperature (>35°C) which showed
altered physiological, biochemical and agronomic characteristics. Accumulation
of proline, presence of new protein bands and higher antioxidant enzyme
activity in leaves of G.7 and G.17 reflects their better adaptive response
under heat stress conditions. G.17 and G.19 showed least reduction in number of
spikelets per spike, biological yield and 100 grain weight. It was inferred
that the genotypes G.7, G.17 and G.19 exhibited greater heat tolerance and
could be recommended for cultivation under heat stress conditions.