Gas Exchange, Chlorophyll a Fluorescence, and Metabolite Levels in Leaves of Trifolium Subterraneum During Long-Term Exposure to Elevated CO2
In many C3-plants, the initial stimulation by high CO2 of photosynthesis declines during long-term exposure to high CO2. This is accompanied by excessive starch accumulation, and in some species chloroplast distortion has been observed (1). It has been suggested that the breakdown of the thylakoid proton gradient causes the decline of photosynthesis or, alternatively, that “feedback” because of insufficient sink or transport capacity for sucrose stimulates starch formation and finally inhibits photosynthesis (2). This communication reports of experiments with whole plants or attached leaves which were transferred to high CO2 or to high light and kept under these conditions for one to two weeks.
KeywordsHigh Light Carbohydrate Level Attached Leaf Trifolium SUBTERRANEUM Initial Stimulation
Unable to display preview. Download preview PDF.
- 3.Andre, M., Massimino, D. and Daguenet, A. (1978) Physiol. Plant. 38, 1421–1431Google Scholar
- 10.Stitt, M., Huber, S. and Kerr, P. (1987) in The Biochemistry of Plants (Preiss J., ed.), Vol. 10, pp. 327–455, Academic PressGoogle Scholar
- 11.Foyer, C.H. (1987) Plant Physiol. Biochem. 25, 649–657Google Scholar