Título:	Time sequence of the damage to the acceptor and donor sides of photosystem II by UV-B radiation as evaluated by chlorophyll a fluorescence.
Autoria:	VAN RENSEN, J. J. S. VREDENBERG, W. J. RODRIGUES, G. C.
Afiliação:	JACK J. S. VAN RENSEN, WAGENINGEN UNIVERSITY; WIM J. VREDENBERG, WAGENINGEN UNIVERSITY; GUSTAVO COSTA RODRIGUES, CPAC.
Ano de publicação:	2007
Referência:	Photosynthesis Research, v. 94, p. 291-297, 2007.
Conteúdo:	The effects of ultraviolet-B (UV-B) radiation on photosystem II (PS II) were studied in leaves of Chenopodium album. After the treatment with UV-B the damage was estimated using chlorophyll a fluorescence techniques. Measurements of modulated fluorescence using a pulse amplitude modulated fluorometer revealed that the efficiency of photosystem II decreased both with increasing time of UV-B radiation and with increasing intensity of the UV-B. Fluorescence induction rise curves were analyzed using a mechanistic model of energy trapping. It appears that the damage by UV-B radiation occurs first at the acceptor side of photosystem II, and only later at the donor side.
NAL Thesaurus:	Chenopodium album Chlorophyll Photosystem II Ultraviolet radiation Photosynthesis
Digital Object Identifier:	https://doi.org/10.1007/s11120-007-9177-x
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPAC)