title: Response of senescing wheat leaves to ultraviolet A light: changes in energy transfer efficiency and PS II photochemistry.
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.
authors.affiliation: Laboratory of Biophysics and Biochemistry, School of Life Sciences, Sambalpur University, Orissa, India.
authors.forename: P N
authors.initials: PN
authors.lastname: Joshi
authors.forename: B
authors.initials: B
authors.lastname: Biswal
authors.forename: G
authors.initials: G
authors.lastname: Kulandaivelu
authors.forename: U C
authors.initials: UC
authors.lastname: Biswal
mesh_terms: D002734:Chlorophyll / Q000032:analysis; D004735:Energy Transfer / Q000528:radiation effects*; D007700:Kinetics; D008315:Malondialdehyde / Q000378:metabolism; D010777:Photochemistry; D018515:Plant Leaves / Q000254:growth & development / Q000528:radiation effects*; D013050:Spectrometry, Fluorescence; D014908:Triticum / Q000528:radiation effects*; D014466:Ultraviolet Rays
chemical_list: D002734:Chlorophyll; D008315:Malondialdehyde