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授粉后的矮牵牛花,很快由粉红变为紫蓝,大约40个小时后就迅速凋谢。这是为什么?南非波切夫斯特鲁姆大学的研究者发现,当矮牵牛萌发的花粉管进入雌花器官时,乙烯及其前体1-氨基环丙烷-1-羧酸(ACC)这两种物质迅速增加,就是它们造成了花的损伤并使之迅速枯萎。矮牵牛授粉不久,每朵花乙烯的含量每小时能增加约10毫微升。他们还发现香石竹在授粉后乙烯前体的浓度也迅速增加。这时如果乙烯的生成受到化学抑制剂的抑制,花朵会重新获得生命。然而,
Petunia after pollination, quickly from pink to purple blue, about 40 hours after the rapid withering. Why is this? Researchers at the University of Potsdam in South Africa found that ethylene and its precursor 1-aminocyclopropane-1-carboxylic acid (ACC), both when entering pollen tubes from petunia, The rapid increase in species means that they cause flower damage and rapidly wither. Soon after pollination of petunia, the amount of ethylene per flower can increase by about 10 nanoliters per hour. They also found that the concentration of ethylene precursors rose rapidly after pollination. At this moment, if the formation of ethylene is inhibited by chemical inhibitors, the flowers will regain their life. however,