UNUSUAL ETHYLENE-RELATED BEHAVIOR IN SENESCING FLOWERS OF THE CARNATION SANDROSA
UNUSUAL ETHYLENE-RELATED BEHAVIOR IN SENESCING FLOWERS OF THE CARNATION SANDROSA
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DOI：
10.1111/j.1399-3054.1993.tb01354.x
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发表时间：
1993-07-01
影响因子：
6.4
通讯作者：
TIROSH, T
中科院分区：
文献类型：
--
作者：
MAYAK, S;TIROSH, T
研究了香石竹衰老过程中产生乙烯的时间进程。Sandrosa)花卉进行了研究。这些花的不同寻常之处在于，它们没有表现出乙烯产生的自动催化增加，也没有形成花瓣卷曲。外源乙烯处理使花朵的乙烯形成酶(EFE)活性和乙烯生成量增加，鲜重显著下降。自然衰老也伴随着EFE活性的上升，但没有伴随着1-氨基环丙烷羧酸合成酶活性的上升，也没有伴随着乙烯的产生。观察到幼花对乙烯的反应发生了变化，幼花对外源乙烯的反应比老花更敏感。根据提出的允许该品种在衰老过程中对乙烯反应的能力下降的机制，对结果进行了讨论。
The time course of ethylene production by senescing carnation (Dianthus caryophyllus L. cv. Sandrosa) flowers was studied. These flowers are unusual in that they do not exhibit an autocatalytic increase in ethylene production nor do they develop petal in-rolling. Exposure of the flowers to exogenous ethylene resulted in a rise in their ethylene-forming enzyme (EFE) activity and ethylene production, and at the same time a marked decline in their fresh weight. Natural senescence was also accompanied by a rise in EFE activity, but with no concomitant rise in 1-amino cyclopropane carboxylic acid synthase activity nor in ethylene production. A shift in responsiveness to ethylene was observed, with young flowers more responsive to exogenous ethylene than older flowers. The results are discussed in terms of a proposed mechanism allowing for the decline in competence of this cultivar to respond to ethylene during senescence.