Koning Ross E
Department of Biological Sciences, Rutgers University, P.O. Box 1059, Piscataway, New Jersey, 08854.
Am J Bot. 1986 Jan;73(1):152-155. doi: 10.1002/j.1537-2197.1986.tb09690.x.
The roles of ethylene in corolla growth and senescence have been extensively studied; light, temperature, and abscisic acid (ABA) have already been implicated in rapid corolla opening (unfolding) in morning glory. In the present study, a possible interaction between ABA and ethylene production was examined. While applied ABA promoted corolla unfolding, it also promoted ethylene production. Furthermore, the effect of ABA could be eliminated by the ethylene biosynthesis inhibitors, aminoethoxyvinyl glycine (AVG) and cobalt ions. Simultaneously applied aminocyclopropane carboxylic acid (ACC) augmented the ABA response, but ACC applied alone promoted corolla unfolding as effectively as ABA alone. Measurements of ethylene production during eight successive stages of flower opening showed that the ethylene burst widely reported to occur in opened flowers prior to corolla senescence actually begins before the corolla unfolds. Ethylene production seems to be a later part of the sequence of biochemical events that leads to both corolla unfolding and synchronized inrolling and senescence.
乙烯在花冠生长和衰老过程中的作用已得到广泛研究；光、温度和脱落酸（ABA）已被证实与牵牛花的花冠快速开放（展开）有关。在本研究中，对ABA与乙烯生成之间可能存在的相互作用进行了研究。施加的ABA在促进花冠展开的同时，也促进了乙烯的生成。此外，乙烯生物合成抑制剂氨基乙氧基乙烯基甘氨酸（AVG）和钴离子可消除ABA的作用。同时施加的氨基环丙烷羧酸（ACC）增强了ABA的反应，但单独施加ACC促进花冠展开的效果与单独施加ABA一样有效。对花朵开放的八个连续阶段的乙烯生成进行测量表明，广泛报道的在花冠衰老之前在开放花朵中出现的乙烯爆发实际上在花冠展开之前就已开始。乙烯生成似乎是导致花冠展开以及同步内卷和衰老的一系列生化事件中的后期部分。
