An Assessment of Ethylene and Carbon Dioxide Exchange in Plants
Current evidence indicates that ethylene is a volatile by-product of amino acid metabolism. Ethylene synthesis is linked with nitrogen metabolism through methionine and S-adenosylmethionine and as a volatile emission may serve as a non-destructive probe of amino acid turnover during photosynthesis and photorespiration. Very little is known about the relationship between ethylene and CO2 gas exchange in photosynthetic tissue. CO2 enhances the rate of ethylene release from leaf tissue in the light (1–5) and it has been proposed (3) that ethylene synthesis and/or metabolism may be moderated by photosynthetic and respiratory processes in photosynthetically competent leaves through changes in the internal CO2 concentrations.
KeywordsEthylene Evolution Ethylene Synthesis Photosynthetic Tissue Ethylene Release Ethylene Exposure
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