Wagdi S. Soliman and Shu-ichi Sugiyama
Interspecific Variation in Heat Stress Tolerance and Oxidative Damage among 15 C3 Species
983 - 986
2012
6
11
International Journal of Agricultural and Biosystems Engineering
https://publications.waset.org/pdf/2848
https://publications.waset.org/vol/71
World Academy of Science, Engineering and Technology
The C3 plants are frequently suffering from exposure
to high temperature stress which limits the growth and yield of these
plants. This study seeks to clarify the physiological mechanisms of
heat tolerance in relation to oxidative stress in C3 species. Fifteen C3
species were exposed to prolonged moderately high temperature
stress 3630°C for 40 days in a growth chamber. Chlorophyll
fluorescence (FvFm) showed great difference among species at 40
days of the stress. The species showed decreases in FvFm and
increases in malondialdehyde (MDA) content under stress condition
as well as negative correlation between FvFm and MDA (r 0.61)
at 40 days of the stress. Hydrogen peroxide (H2O2) content before
and after stress in addition to its response under stress showed great
differences among species. The results suggest that the difference in
heat tolerance among C3 species is closely associated with the ability
to suppress oxidative damage but not with the content of reactive
oxygen species (ROS) which is regulated by complex network.
Open Science Index 71, 2012