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外施一定浓度的乙烯利会促进豫胶叶片外观变黄衰老,叶内部发生水溶性蛋白质、叶绿素含量和过氧化氢酶活性下降,以及细胞透性、丙二醛含量和过氧化物酶活性上升等生理生化反应。用乙烯利加等浓度的L—半胱氨酸(或抗坏血酸或吲哚乙酸)处理,则会减轻上述变化和反应。 L—半胱氨酸等三种药剂对外施乙烯促进叶片的衰老,特别是连体叶片的衰老只能起延缓作用而未能完全拮抗。 L—半胱氨酸延缓外施乙烯;促进橡胶叶片衰老的效应,大于抗坏血酸和吲哚乙酸。
Application of a certain concentration of ethephon will promote the appearance of Yu leaves plastic yellow aging, leaf water-soluble protein content, chlorophyll content and catalase activity decreased, and cell permeability, malondialdehyde content and peroxidase activity increased Other physiological and biochemical reactions. Treatment with ethephon at an equal concentration of L-cysteine (or ascorbic acid or indole acetic acid) will alleviate these changes and reactions. L-cysteine and other three agents on the application of ethylene to promote leaf senescence, especially the Siamese leaf aging can only play a retardation and failed to completely antagonize. L-cysteine delayed the application of ethylene; the effect of promoting rubber leaf senescence was greater than that of ascorbic acid and indole acetic acid.