Abstract
Several component processes of photosynthesis were measured in osmotically stressed mesophyll cells of Xanthium strumarium L. The ribulose-1,5-bisphosphate regeneration capacity was reduced by water stress. Photophoshorylation was sensitive to water stress but photosynthetic electron transport was unaffected by water potentials down to-40 bar (-4 MPa). The concentrations of several intermediates of the photosynthetic carbon-reduction cycle remained relatively constant and did not indicate that ATP supply was limiting photosynthesis in the water-stressed cells.
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Abbreviations
- Hepes:
-
4-(2-hydroxyethyl)-1-piperazinepropanesulfonic acid
- PGA:
-
3-phosphoglyceric acid
- RuBP:
-
ribulose-1,5-bisphosphate
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Sharkey, T.D., Badger, M.R. Effects of water stress on photosynthetic electron transport, photophosphorylation, and metabolite levels of Xanthium strumarium mesophyll cells. Planta 156, 199–206 (1982). https://doi.org/10.1007/BF00393725
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DOI: https://doi.org/10.1007/BF00393725