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早熟桃果实在成熟前（授粉后30～48d）产生的乙烯极微，而此阶段种子产生的乙烯则相当高。果实乙烯大量产生前内果皮开裂。种子产生的乙烯可能是启动早熟桃果实成熟的关键性因子。
Premature peach fruit before ripening (pollination 30 ~ 48d) produced very little ethylene, while the stage of the production of ethylene seeds is quite high. Endocarp cracking occurs before fruit ethylene is abundantly produced. Ethylene produced by seeds may be a key factor in the initiation of ripening of peach fruits.