Assaying functional Photosystem I1 (PSII) complexes by flash-induced oxygen yield from leaf tissue after photoinhibition is most direct but time-consuming, while measurement of chlorophyll fluorescence in leaves is only representative of chloroplast near the leaf surface. To circumvent these deficiencies, we obtained an excellent l linear correlation between (a) the integrated, transient electron flow Σ to PS I, after superimposing a single-turnover flash on steady far-red light, and (b.) the relative oxygen yield per flash during progressive photoinactivation of Photosystem II Leaves of C3 and C4 plants, woody and herbaceous species, wild type and a chlorophyll b-less (PS) II mutant, and monocot and dicot plants gave a single linear correlation, which seems to be a universal relation for predicting the relative oxygen yield per flash from Σ.
A universal correlation between flash-induced P700 redox kinetics and photoinactivation of photosystem II in all leaves? / P. Losciale; R. Oguchi; L. Hendrickson; A. B. Hope; L. Corelli Grappadelli; W. S. Chow. - STAMPA. - (2008), pp. 1421-1424. (Intervento presentato al convegno PS07. 14th International Congress on Photosynthesis tenutosi a Glasgow nel 2007).
A universal correlation between flash-induced P700 redox kinetics and photoinactivation of photosystem II in all leaves?
LOSCIALE, PASQUALE;CORELLI GRAPPADELLI, LUCA;
2008
Abstract
Assaying functional Photosystem I1 (PSII) complexes by flash-induced oxygen yield from leaf tissue after photoinhibition is most direct but time-consuming, while measurement of chlorophyll fluorescence in leaves is only representative of chloroplast near the leaf surface. To circumvent these deficiencies, we obtained an excellent l linear correlation between (a) the integrated, transient electron flow Σ to PS I, after superimposing a single-turnover flash on steady far-red light, and (b.) the relative oxygen yield per flash during progressive photoinactivation of Photosystem II Leaves of C3 and C4 plants, woody and herbaceous species, wild type and a chlorophyll b-less (PS) II mutant, and monocot and dicot plants gave a single linear correlation, which seems to be a universal relation for predicting the relative oxygen yield per flash from Σ.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
