Optimal timing of corolla abscission:: experimental study on Erythronium japonicum (Liliaceae)
Optimal timing of corolla abscission:: experimental study on Erythronium japonicum (Liliaceae)
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DOI：
10.1046/j.1365-2435.2000.00401.x
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发表时间：
2000-02-01
影响因子：
5.2
通讯作者：
Sakai, S
中科院分区：
文献类型：
--
作者：
Ishii, HS;Sakai, S
1.本文分析了雌、雄成功对刺桐花寿命的影响。我们发现，花粉在柱头上的沉积可以促进花的衰老，但存在一个最小寿命（1996年为13.64天，1997年为12.20天），在此期间，即使用足够数量的花粉授粉，花也不会开花.我们认为这种花寿命的存在并不有利于雌性功能的发挥，因为花冠脱落反应胚珠受精所需的时间并不长，雌性功能在3天左右就完成了. E的花朵japonicum对花粉去除没有反应，如花药去除实验不影响花寿命的事实所示。然而，具有一定的寿命将是有利的，这有利于男性的成功，这样大部分花粉粒就可以被输出。花的大部分花粉散布所需的时间约为12天，非常接近花的最低寿命.我们的结论是，最低寿命可能存在的男性功能和花的寿命可能会受到不同的男性和女性功能的花。
1. We analysed how male and female success affects the floral longevity in Erythronium japonicum. We found that flower senescence is advanced by deposition of pollen grains on the stigma but that there exists a minimum longevity (13.64 days in 1996 and 12.20 days in 1997) during which the flower never abscises, even if it is pollinated with a sufficient number of pollen grains.2. We suggest that this floral longevity does not exist to benefit the female function, because the time needed for corolla abscission reacting to ovule fertilization was not so long and the female function was completed within about 3 days.3. Flowers of E. japonicum do not react to pollen removal, as shown by the fact that anther removal experiments did not affect floral longevity. However, it would be advantageous to have some duration of longevity which benefits male success such that most of pollen grains can be expected to be exported. The duration needed to disperse most pollen grains of a flower was about 12 days, very close to the minimum floral longevity.4. We conclude that a minimum longevity may exist for male functions and that floral longevity may be influenced differently by the male and the female functions of flowers.