Role of ethylene in the senescence of isolated hibiscus petals.
Role of ethylene in the senescence of isolated hibiscus petals.
复制标题
乙烯在分离芙蓉花瓣衰老中的作用。
DOI：
10.1104/pp.79.3.679
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发表时间：
1985
期刊：
影响因子：
7.4
通讯作者：
D. .. Chisholm
中科院分区：
文献类型：
--
作者：
W. Woodson;S. H. Hanchey;D. .. Chisholm
芙蓉花瓣的衰老过程。(cv Pink Versicolor）与乙烯产生增加有关。暴露于乙烯（10微升/升）加速衰老的开始，如花瓣内卷所示，并刺激乙烯的产生。基础施用1-氨基环丙烷-1-羧酸（ACC）也加速衰老。乙烯生物合成抑制剂氨氧乙酸能有效地抑制花瓣的乙烯释放，延缓花瓣的卷收。在显着的对比，这些结果与成熟的花瓣，未成熟的花瓣分离的花开放前一天没有响应乙烯在乙烯生产或花瓣卷的增加方面。此外，在花开放前一天用硫代硫酸银处理有效地防止花瓣衰老，而在花开放的早晨用硫代硫酸银处理无效。ACC的应用，未成熟和成熟的花瓣大大刺激乙烯的生产，表明在这两种组织中的活性乙烯形成酶的存在。未成熟的花瓣含有较少的免费ACC比成熟，衰老花瓣，并似乎拥有一个更活跃的系统，将ACC转化为共轭形式。因此，虽然未成熟花瓣对乙烯的反应性缺乏的性质是未知的，但木槿花瓣中乙烯的产生似乎受到ACC可用性控制的调节。
Senescence of petals isolated from flowers of Hibiscus rosa-sinensis L. (cv Pink Versicolor) was associated with increased ethylene production. Exposure to ethylene (10 microliters per liter) accelerated the onset of senescence, as indicated by petal in-rolling, and stimulated ethylene production. Senescence was also hastened by basal application of 1-aminocyclopropane-1-carboxylic acid (ACC). Aminooxyacetic acid, an inhibitor of ethylene biosynthesis, effectively inhibited ethylene production by petals and delayed petal in-rolling. In marked contrast to these results with mature petals, immature petals isolated from flowers the day before flower opening did not respond to ethylene in terms of an increase in ethylene production or petal in-rolling. Furthermore, treatment with silver thiosulfate the day before flower opening effectively prevented petal senescence, while silver thiosulfate treatment on the morning of flower opening was ineffective. Application of ACC to both immature and mature petals greatly stimulated ethylene production indicating the presence of an active ethylene-forming enzyme in both tissues. Immature petals contained less free ACC than mature, presenescent petals and appeared to possess a more active system for converting ACC into its conjugated form. Thus, while the nature of the lack of responsiveness of immature petals to ethylene is unknown, ethylene production in hibiscus petals appears to be regulated by the control over ACC availability.