title: [Influence of a variation potential on photosynthesis in pumpkin seedlings (Cucurbita pepo L.)].
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.
authors.forename: V S
authors.initials: VS
authors.lastname: Sukhov
authors.forename: O N
authors.initials: ON
authors.lastname: Shesterneva
authors.forename: L M
authors.initials: LM
authors.lastname: Surova
authors.forename: E A
authors.initials: EA
authors.lastname: Rumiantsev
authors.forename: V A
authors.initials: VA
authors.lastname: Vodeneev
mesh_terms: D002245:Carbon Dioxide / Q000378:metabolism*; D002736:Chloroplasts / Q000378:metabolism*; D018548:Cotyledon / Q000254:growth & development / Q000378:metabolism*; D028464:Cucurbita / Q000254:growth & development / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D010788:Photosynthesis; D036226:Seedlings / Q000254:growth & development / Q000378:metabolism*
chemical_list: D002245:Carbon Dioxide