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- W2023577892 abstract "Apparent rates of photosynthetic O 2 evolution and light-dependent pH change (Δ[H + ]) were measured in solutions containing leaf slices and bubbled with gas streams of varied composition. Intracellular recycling of O 2 and CO 2 between photosynthetic and respiratory reaction systems seems to be possible in green cells in the light. As a result of photosynthetic O 2 evolution, the tissue and the solution are never strictly anaerobic even after prolonged bubbling with N 2 . Internal gas exchange is more pronounced in slices from the leaves of maize (a C-4 plant) having the complex Kranz tissue differentiation of mesophyll and bundle sheath, than in the leaves of barley (a C-3 plant).Light-dependent Δ[H + ] is observed under all conditions used, i.e. in air, air – CO 2 , pure N 2 , and N 2 + CO 2 . During the early stages of greening of etiolated leaves, Δ[H + ] is found to be closely related to photosynthetic O 2 evolution. After prolonged greening, Δ[H + ] is larger in air – CO 2 than in air. In pure N 2 , Δ[H + ] is smaller and apparent O 2 evolution is larger than in N2 + CO 2 . These results are discussed in relation to the hypothesis that part of light-dependent Δ[H + ] is independent of concomitant photosynthetic CO 2 fixation." @default.
- W2023577892 created "2016-06-24" @default.
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- W2023577892 date "1973-10-01" @default.
- W2023577892 modified "2023-09-26" @default.
- W2023577892 title "Photosynthetic O2 evolution and apparent H+ uptake by slices of greening barley and maize leaves in aerobic and anaerobic solutions" @default.
- W2023577892 doi "https://doi.org/10.1139/b73-249" @default.
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