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Response of senescing wheat leaves to ultraviolet A light: changes in energy transfer efficiency and PS II
P N Joshi1, B Biswal, G Kulandaivelu
1Laboratory of Biophysics and Biochemistry, School of Life Sciences, Sambalpur University, Orissa, India.
Radiation and Environmental Biophysics
|January 1, 1994
Abstract:
Response of senescing leaves of wheat seedlings to ultraviolet A (UVA) radiation (365 nm) has been examined. The results indicate that senescence-induced disorganization of thylakoid membrane, decline in carotenoid-to-chlorophyll energy transfer, and enhancement of lipid peroxidation are furthered by radiation. The senescence-induced decline in photochemical activity of photosystem II further declines on irradiation. UVA does not specifically alter any site other than those damaged by senescence.