Abstract
Ethylene induces the degreening of the peel of Citrus unshiu Marc. and simultaneously the increase of chlorophyllase activity, indicating that ethylene accelerates the chlorophyll destruction through the enhancement of chlorophyllase activity. Cycloheximide inhibited the ethylene-enhanced chlorophyll degradation and repressed the enhancement of the chlorophyllase activity, while chloramphenicol did not affect the chlorophyll degradation nor the chlorophyllase activity. Based on these results, the role of ethylene in the chlorophyllase activation and the chloroplast senescence is discussed.
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