乙烯,游离氨基酸与金帅苹果叶片衰老和脱落关系的研究

CORRELATION OF ETHYLENE,FREE AMINO ACIDS WITH SENESCENCE AND ABSCISSION OF GOLDEN DELICIOUS APPLE LEAVES

The correlation of ethylene with Golden Delicious apple leaf senescence,leaf abscission and the stimulative effect of free amino acids on production of ethylene were stu- died.As the time of preparation prolonged,the explant leaves senesced rapidly,a large amount of ethylene was released,free amino acids were accumulated and abscission oc-curred.Ag~+ could inhibit the abscission but not the s(?)necence.Exogenous ethylene couldpromote abscission of explant leaves but not their senescence and Ag~+ could also inhibit theabscission.10mM L-amino a(?)ds could stimulate the production of ethylene mainly by in-creasing ACC content but not by raising the activity of EFE.The result suggested thatethylene had direct effect on the abscission of Golden Delicious apple leaves.The abscissioncaused by senescence was due to the release of ethylene during leaf senescence and the effectof free amino acids on leaf abscission was caused by thetr stimulative effect on release ofethylene.