Abstract
In grapevine (Vitis vinifera L.) leaf chlorophyll (Chl) a and Chl b and carotenoid contents were higher in plants grown at low photon flux densities (PFD) than in those grown at medium and high PFD. The highest Chl a variable to maximum fluorescence ratio Fv/Fm was observed in plants grown at medium PFD while the minimum fluorescence F0 was highest in those at high PFD. In isolated thylakoids, both high and low PFD caused marked inhibition of whole chain and photosystem 2 (PS2) activities. The artificial exogenous electron donor diphenyl carbazide significantly restored the loss of PS2 activity in low PFD leaves.
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Bertamini, M., Nedunchezhian, N. Photosynthetic Responses for Vitis vinifera Plants Grown at Different Photon Flux Densities Under Field Conditions. Biologia Plantarum 48, 149–152 (2004). https://doi.org/10.1023/B:BIOP.0000024294.75496.a6
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DOI: https://doi.org/10.1023/B:BIOP.0000024294.75496.a6