FRUIT-INDUCED AND APICAL SENESCENCE IN PISUM SATIVUM L
FRUIT-INDUCED AND APICAL SENESCENCE IN PISUM SATIVUM L
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DOI：
10.1104/pp.36.4.389
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发表时间：
1961-01-01
期刊：
影响因子：
7.4
通讯作者：
GOTTSCHALL, V
中科院分区：
文献类型：
--
作者：
LOCKHART, JA;GOTTSCHALL, V
阿拉斯加豌豆，像许多其他一年生植物，通常死亡的结果，水果的发展。赤霉素处理通过延迟果实形成来延缓衰老。在延长营养生长方面，分离种子几乎与去除整个果实一样有效。当果实发育被阻止摘花或赤霉素处理，生长的主茎只持续了有限的时间。最终茎尖分化为最终的花和叶，顶端分生组织消失。茎尖年轻的植物，嫁接到老植物的提示，增长迅速，只要一段时间，当嫁接回一个年轻的植物旧的提示停止生长，即使当嫁接到一个年轻的植物。将老的或年轻的茎尖侧面嫁接到另一植物上基本上不影响其所嫁接的植物的生长。当个别侧枝被允许发展，他们的增长速度是小于老茎，但增长的持续时间基本上一样长。它的结论是顶端衰老是由于一些退行性变化发生在顶端本身，而不是在植物内易位。显然，顶端的衰老与开花的生理开始没有直接关系。即使没有开花，也发生顶端衰老。
Alaska peas, like many other annual plants, normally die as a result of fruit development. Gibberellin treatments delayed senescence by delaying fruit formation. Detachment of the seeds was almost as effective as removing the entire fruit in prolonging vegetative growth. When fruit development was prevented by deflowering or by gibberllin treatments, growth of the main stem continued only for a limited time. Ultimately the stem apex differentiated into a final flower and leaf and the apical meristem disappeared. Stem apices of young plants, grafted to tips of old plants, grew as rapidly and for as long a time as when grafted back to a young plant The old tips ceased growth even when grafted to a young plant. An old or young stem apex side-grafted to another plant did not substantially affect growth of the plant to which it was grafted. When individual lateral branches were allowed to develop, their growth rate was less than that of the old stem but duration of growth was substantially as long. It is concluded that apical senescence is due to some degenerative change taking place within the apex itself and is not translocated within the plant. Apparently, senescence of the apex is not directly related to the physiological onset of flowering. Apical senescence occurred even though no flowering took place.