RESPONSE OF SENESCING WHEAT LEAVES TO ULTRAVIOLET-A LIGHT - CHANGES IN ENERGY-TRANSFER EFFICIENCY AND PS-II PHOTOCHEMISTRY

Authors
JOSHI PN BISWAL B KULANDAIVELU G BISWAL UC
Citation
Pn. Joshi et al., RESPONSE OF SENESCING WHEAT LEAVES TO ULTRAVIOLET-A LIGHT - CHANGES IN ENERGY-TRANSFER EFFICIENCY AND PS-II PHOTOCHEMISTRY, Radiation and environmental biophysics, 33(2), 1994, pp. 167-176
Citations number
31
Categorie Soggetti
Biophysics,"Radiology,Nuclear Medicine & Medical Imaging","Environmental Sciences
Journal title
Radiation and environmental biophysics → ACNP
ISSN journal
0301634X
Volume
33
Issue
2
Year of publication
1994
Pages
167 - 176
Database
ISI
SICI code
0301-634X(1994)33:2<167:ROSWLT>2.0.ZU;2-B
Abstract
Response of senescing leaves of wheat seedlings to ultraviolet A (UVA) radiation (365 nm) has been examined. The results indicate that senes cence-induced disorganization of thylakoid membrane, decline in carote noid-to-chlorophyll energy transfer, and enhancement of lipid peroxida tion are furthered by radiation. The senescence-induced decline in pho tochemical activity of photosystem II further declines on irradiation. UVA does not specifically alter any site other than those damaged by senescence.