Changes in the photosynthetic activities during several stages of vegetative growth of Spirodela polyrhiza: Effect of chromate

Article Article scientifique Article Changes in the photosynthetic activities during several stages of vegetative growth of Spirodela polyrhiza: Effect of chromate eng 2000-11 author Susplugas Sophie 514303 author Srivastava Alaka 29149 author Strasser Reto 25398 503-512 10.1016/S0176-1617(00)80105-4 0176-1617 https://linkinghub.elsevier.com/retrieve/pii/S0176161700801054 The photosynthetic behavior of fresh green plants, plants carrying turions and the detached turions of Spirodela polyrhiza, was studied by using chlorophyll a (Chl a) fluorescence. The fresh green fronds showed a normal Chl a fluorescence transient, OJIP. However, the mother fronds carrying turions did not show an OJIP transient. Instead, a clear OKJIP with an additional K step, which usually appears due to limitation on the water splitting system, was detected. The K step again disappeared in matured turions. The photosynthetic performance index (PI) of turions was more than 46% lower than the fresh green plants, which has been correlated with a decrease in the probability that an absorbed photon will move an electron into the electron transport chain. Cr2O72- inhibited the plant growth, though it induces the turion formation. Cr2O72- also induces the K step in green fronds. The overall photosynthetic efficiency of PS II and PS I of green fronds was found to be decreased after Cr2O72- treatment. Spirodela polyrhiza Chromate Turions PS I PS II Dewey 580 45 Département des sciences végétales 163 false Journal of plant physiology 157 5 7fcb2cd4-a10a-44e8-8f5f-959ba09d5b24 Article (Published version) Restricted STRASSER02.pdf 348615 application/pdf a1926328b1042d7ce59a70baa39537e2d2d2768a4a955bfb60536d297d62cc4a restrictedAccess Faculté des sciences / Section de biologie / Département des sciences végétales

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Changes in the photosynthetic activities during several stages of vegetative growth of Spirodela polyrhiza: Effect of chromate	Journal of plant physiology			2000	65	0

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Susplugas, Sophie