HIGH TEMPERATURE INDUCED ALTERATIONS IN
THYLAKOID MEMBRANE PHOTOFUNCTIONS OF
WHEAT PRIMARY LEAVES
K. RAM PRASAD AND P. KIRAN MAYI
Abstract
In the present study the effect of high temperature has been studied on the thylakoid
photochemical activity and alterations in the membrane organization of wheat primary leaves. The
results clearly indicated that high temperature caused inhibition of photosystem II catalyzed electron
transport activities and enhancement of photosystem I catalyzed electron transport activities in wheat
thylakoids. The reason for the inhibition of photosystem II activity is alteration at the level of water
oxidation complex. In addition high temperature caused an increase in the lipid peroxidation of
thylakoid membrane which can be minimized if the ascorbate is present during high temperature
treatment.
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