The Involvement of Water Stress and Ethylene in Senescence of Cut Carnation Flowers
The Involvement of Water Stress and Ethylene in Senescence of Cut Carnation Flowers
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水分胁迫和乙烯对康乃馨切花衰老的影响
DOI：
10.1093/jxb/33.6.1202
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发表时间：
1982
影响因子：
6.9
通讯作者：
R. Broun
中科院分区：
文献类型：
--
作者：
A. Borochov;S. Mayak;R. Broun
将切花康乃馨（Dianthus caryophyllus，cv.白色Sim）至短期（12 h）水分胁迫导致花瓣的水分饱和亏缺（WSD）显著增加。在将花转移到潮湿条件（r.h. 85%）。然而，增加氨基环丙烷羧酸（ACC）的含量发生后立即应力。转移到潮湿条件下乙烯产量的相关上升早于对照。单独或与水分胁迫结合施用外源乙烯，增加了花瓣的WSD。连续处理切花与氨基氧乙酸（AOA），一个已知的ACC合成的抑制剂，抑制乙烯的产生，延迟WSD的上升，伴随着发展和衰老，因此延迟萎蔫。在胁迫花之前用AOA短期（2小时）处理获得了类似的结果。短期AOA处理部分抑制了应激期间WSD的上升。我们的研究结果的基础上，特别是没有增加乙烯生产过程中发生的水分胁迫，它表明，水分胁迫的影响是不直接介导的乙烯。水分胁迫和AOA对花瓣细胞膜的某些特性可能的调制作用进行了讨论。
Exposing cut carnation (Dianthus caryophyllus, cv. White Sim) to short term (12 h) water stress resulted in a marked increase in the water saturation deficit (WSD) of the petals. Full recovery occurred upon transfer of the flowers to water in humid conditions (r.h. 85%). However, an increase in aminocyclopropane carboxylic acid (ACC) content occurred immediately upon stress. An associated rise in ethylene production following transfer to humid conditions was observed earlier than in the control. Exogenous ethylene, applied alone or in combination with water stress, increased the WSD of the petals. Continuous treatment of cut flowers with amino-oxyacetic acid (AOA), a known inhibitor of ACC synthesis, suppressed ethylene production, delayed the rise in WSD which accompanied development and senescence and hence delayed wilting. Similar results were obtained with short term (2 h) treatment with AOA prior to stressing the flowers. Short term AOA treatment partially inhibited the rise in WSD during the stress period. On the basis of our findings, in particular that no rise in ethylene production occurred during water stress, it is suggested that the effect of water stress is not directly mediated by ethylene. The possible modulatory effect of water stress and AOA on certain characteristics of the petal cell membrane is discussed.