Influence of a variation potential on photosynthesis in pumpkin seedlings (Cucurbita pepo L.) |
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Authors: | V S Sukhov O N Sherstneva L M Surova E A Rumiantsev V A Vodeneev |
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Institution: | 1. Department of Biophysics, Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, 603950, Russia
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Abstract: | The influence of a variation potential on photosynthesis in pumpkin seedlings (Cucurbita pepo L.) was investigated in our work. It was shown that the variation potential induced by cotyledon burning propagates into a leaf. It decreases CO2 assimilation and transpiration as well as increases nonphotochemical quenching. Investigation of isolated chloroplasts showed that lowering of the pH in incubation medium from 6.9–7.2 to 6.5 increases nonphotochemical quenching. It was proposed that lowering of the cytoplasmic pH induced by the variation potential takes place in the photosynthetic response development. |
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