RESPONSE OF SENESCING LEAVES OF WHEAT SEEDLINGS TO UVA RADIATION - INHIBITION OF PSII ACTIVITY IN LIGHT AND DARKNESS

Authors
JOSHI PN RAMASWAMY NK RAVAL MK DESAI TS NAIR PM BISWAL UC
Citation
Pn. Joshi et al., RESPONSE OF SENESCING LEAVES OF WHEAT SEEDLINGS TO UVA RADIATION - INHIBITION OF PSII ACTIVITY IN LIGHT AND DARKNESS, Environmental and experimental botany, 38(3), 1997, pp. 237-242
Citations number
29
Categorie Soggetti
Environmental Sciences","Plant Sciences
Journal title
Environmental and experimental botany → ACNP
ISSN journal
00988472
Volume
38
Issue
3
Year of publication
1997
Pages
237 - 242
Database
ISI
SICI code
0098-8472(1997)38:3<237:ROSLOW>2.0.ZU;2-J
Abstract
Ultraviolet A (UVA) induced inhibition in photosystem II (PSII) photoc hemistry of primary leaves of wheat seedlings senescing in light or da rkness has been examined. O-2 evolution and 2,6-dichlorophenol indophe nol (DCPIP) photoreduction diminished in the presence of light. Result s of thermoluminescence (TL) studies suggest that UVA inhibits the act ivity of PSII by accelerating the process of senescence-induced modifi cations of Q(B) protein conformation and/or S-state transitions. (C) 1 997 Elsevier Science B.V.