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Effects of ultraviolet-B radiation in the CO2 fixation, photosystem II activity and spectroscopic properties of the wild and mutant Anacystis cells

AutorNedunchezhian, N.; Kulandaivelu, G.
Fecha de publicación1996
EditorSpringer
CitaciónActa Physiologiae Plantarum 18: 39-45 (1996)
ResumenChanges in photosystem II activity measured in wild and DCMU resistant mutant cells of Anacystis nidulans, after ultraviolet-B (UV-B) irradiation were investigated. UV-B treatment of wild cells drastically decreased PS II activity, while the mutant cells demonstrated certain degree of resistance to such damages. Decrease in the photosynthetic rate was found to be primarily due to the loss of energy transfer from phycobilisoms (PBS) to chlorophyll (Chl) as the former in cyanobacteria acts as the primary light harvesting complex, This is supported by studies of the absorption and fluorescence excitation and emission spectra.
URIhttp://hdl.handle.net/10261/121220
DOInull
Identificadoresdoi: null
issn: 0137-5881
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