Inhibition of the water splitting system by sodium chloride stress in the green alga Chlorella vulgari
Document title: Inhibition of the water splitting system by sodium chloride stress in the green alga Chlorella vulgari
Journal: Brazilian journal of plant physiology
Database: PERIÓDICA
System number: 000276151
ISSN: 1677-0420
Authors: 1
Institutions: 1Tanta University, Faculty of Science Botany, Tanta. Egipto
Year:
Season: Ene-Abr
Volumen: 16
Number: 1
Pages: 25-29
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, analítico
English abstract The effect of sodium chloride on the photosynthetic electron transport chain was investigated in the freshwater green alga Chlorella vulgaris. It was found that the rate of oxygen evolution under steady state and flash light conditions diminished by increasing salt concentrations. Salt treatment of cells also decreased the fluorescence and delayed luminescence yields. However, the fluorescence yield was almost completely restored by the addition of an artificial electron donor to the NaCl-treated cells. The oscillation pattern of the thermoluminescence B band as a function of flash number indicated that the S2-S3 transition of the water splitting system is inhibited by NaCl treatment
Portuguese abstract O efeito do NaCl na cadeia transportadora de elétrons foi investigado na alga verde Chlorella vulgaris. Observou-se que a taxa de liberação de oxigênio sob condições de equilíbrio e de flash de luz diminuía à medida que se aumentava a concentração de sal. O tratamento com NaCl também diminuiu o rendimento da fluorescência e retardou o da luminescência. No entanto, o rendimento da fluorescência foi quase inteiramente restaurado pela adição de um doador artificial de elétrons. O padrão de oscilação da banda de termoluminescência B como função do números de flashes indicou que a transição S2®S3 do sistema de fotooxidação da água era inibida pelo tratamento com NaCl
Disciplines: Biología
Keyword: Algas,
Fisiología vegetal,
Chlorella vulgaris,
Fotosistema II,
Salinidad,
Transporte de electrones,
Fotooxidación,
Estrés,
Cloruro de sodio
Keyword: Biology,
Algae,
Plant physiology,
Photooxidation,
Stress,
Electron transport,
Photosystem II,
Salinity,
Chlorella vulgaris,
Sodium chloride
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