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- W1991000136 abstract "Cytokinin is known to be involved in many processes related to plastid development and function but the exact role of cytokinin in photosynthesis remains elusive. To investigate more profoundly the effects of cytokinin in this process, the photosynthetic activity of transgenic Pssu-ipt and 35S:CKX1 tobacco (Nicotiana tabacum) plants with respectively elevated and reduced endogenous cytokinin content was evaluated. Pigment analysis indicated that elevated endogenous cytokinin content resulted in increased pigment content. Functional analysis of the photosynthetic apparatus by chlorophyll a fluorescence and in vitro electron transport measurements clearly showed that changing the endogenous cytokinin content affects the activity of the photosynthetic apparatus. Surprisingly, both an increase as well as a decrease in cytokinin content results in a better photosynthetic performance. Quenching analysis revealed that the initial responses of the photosynthetic apparatus on a dark-light transition are not affected by changed cytokinin content. However, it has an effect on the further kinetic behavior. Taken together, we suggest that cytokinins can induce structural changes in the different parts of the electron transport chain as also demonstrated by the in vitro electron transport measurements." @default.
- W1991000136 created "2016-06-24" @default.
- W1991000136 creator A5000176363 @default.
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- W1991000136 date "2012-01-23" @default.
- W1991000136 modified "2023-09-25" @default.
- W1991000136 title "Evaluation of the photosynthetic activity in transgenic tobacco plants with altered endogenous cytokinin content: lessons from cytokinin" @default.
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- W1991000136 doi "https://doi.org/10.1111/j.1399-3054.2011.01558.x" @default.
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