Mayak S, Halevy A H
The Volcani Institute of Agricultural Research, Rehovot, Israel and Department of Floriculture, The Hebrew University, Rehovot, Israel.
Plant Physiol. 1972 Sep;50(3):341-6. doi: 10.1104/pp.50.3.341.
The role of abscisic acid and ethylene in the senescence of rose petals cv. Golden-Wave was examined. A rise in ethylene evolution, followed by an increase in the level of abscisic acid was observed. The presence of abscisic acid in rose petals was established, using different chromatography systems, several bioassays, and immunoassay. External application of ethylene accelerated senescence and induced a rise in endogenous abscisic acid-like activity. Application of abscisic acid promoted senescence, but suppressed ethylene production. The data suggest that the participation of these two hormones in the control of senescence is via the same pathway. The possibility of interrelationship between abscisic acid and ethylene was tested and experimental evidence in favor of this hypothesis is presented. It was suggested that ethylene affects senescence in rose petals by inducing an increase in abscisic acid activity, which in turn may control ethylene evolution, via a feedback mechanism.
研究了脱落酸和乙烯在玫瑰品种“金浪”花瓣衰老过程中的作用。观察到乙烯释放量增加，随后脱落酸水平升高。利用不同的色谱系统、多种生物测定法和免疫测定法确定了玫瑰花瓣中脱落酸的存在。外源施加乙烯加速了衰老并诱导内源性脱落酸样活性升高。施加脱落酸促进了衰老，但抑制了乙烯的产生。数据表明这两种激素参与衰老调控是通过相同的途径。测试了脱落酸与乙烯之间相互关系的可能性，并提供了支持该假设的实验证据。有人提出，乙烯通过诱导脱落酸活性增加来影响玫瑰花瓣的衰老，而脱落酸活性增加反过来可能通过反馈机制控制乙烯的释放。
