Abstract

The relationships among the leaf adenylate energy charge, the xanthophyll-cycle components, and photosystem II (PSII) fluorescence quenching were determined in leaves of cotton (Gossypium hirsutum L. cv. Acala) under different leaf temperatures and different intercellular CO 2 concentrations (C i ). Attenuating the rate of photosynthesis by lowering the C i at a given temperature and photon flux density increased the concentration of high-energy adenylate phosphate bonds (adenylate energy charge) in the cell by restricting ATP consumption (A.M. Gilmore, O. Bjorkman 1994, Planta 192, 526-536)

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