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Inhibition of Chlorophyll Synthesis by High Concentrations of Carbon Dioxide

1965; Oxford University Press; Volume: 40; Issue: 3 Linguagem: Inglês

10.1104/pp.40.3.577

1532-2548

B.T. Steer, David A. Walker,

Plant responses to elevated CO2

High concentrations of carbon dioxide inhibit the greening of etiolated plants. In the presence of 20% oxygen, concentrations of carbon dioxide of 10% and above inhibited the production of chlorophyll in etiolated leaves of barley, wheat, and dwarf French bean. On return to air, recovery from this inhibition took place rapidly. High concentrations of carbon dioxide were also inhibitory when illumination was discontinuous (2-msecond flash separated by 3-minute dark period) during which photosynthetic activity was adjudged to be negligible. The inhibition was alleviated by feeding with delta-amino levulinic aid, implying that the site of inhibition was early in the sequence of chlorophyll synthesis. 15 references, 3 figures, 1 table.