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Título

Ultraviolet-B (280-320 nm) radiation induced changes in photosynthetic electron transport during aging of isolated Vigna chloroplasts

AutorNedunchezhian, N.; Ravindran, K. C.; Kulandaivelu, G.
Fecha de publicación1996
EditorCzech Academy of Sciences
CitaciónPhotosynthetica 32: 381-391 (1996)
ResumenChloroplasts isolated from Vigna unguiculata L. seedlings grown under control and ultraviolet-B (UV-B) enhanced fluorescent radiations, when incubated at 0 °C under irradiation and in darkness showed differential loss in various photosynthetic activities. In control chloroplasts, the whole chain and photosystem (PS) 2 reactions were drastically reduced under both irradiation and darkness. PS1 activity also showed significant reduction. In contrast to this, UV-B affected chloroplasts demonstrated high stability by slowing down the inactivation processes. Diphenyl carbazide and NH2OH restored the PS2 activity more in control chloroplasts than in UV-B chloroplasts. Mn2+ failed to restore the PS2 activity in both chloroplast samples. The loss in PS2 activity was primarily due to the loss of 33, 23, and 17 kDa polypeptides in control chloroplasts and to a marginal loss of them in the UV-B chloroplasts.
URIhttp://hdl.handle.net/10261/121236
DOInull
Identificadoresdoi: null
issn: 0300-3604
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