School of Plant Biology, U.C.N.W., LL572UW, Bangor, UK.
Planta. 1979 Sep;146(4):409-14. doi: 10.1007/BF00380853.
Flower lifespan was terminated by corolla abscission 5-6 days after stigma opening in the unpollinated flower. Increased pollen loads produced increased seed set and reduced flower longevity progressively to a minimum of one day after pollination with pure pollen. Weakening of the abscission zone was detectable 8 h after pollination, whilst the pollen tubes were still within the stigmatic zone, suggesting that a stimulus, moving at 4 mm h(-1) minimum, was transmitted through the style and ovary. Soon after pollination removal of the stigma prevented the pollination-induced corolla abscission. Later it was necessary to remove the stigma and upper style, and later still the whole style to delay abscission. The progressive induction of the stigma and style took place at a rate of 1.5 mm h(-1), in advance of the pollen tubes which grew at 0.75 mm h(-1). It was not possible to reproduce the pollination effects by application of indoleacetic acid (IAA) to the stigma or the style.
在未授粉的花朵中，柱头开放 5-6 天后，花冠脱落，从而终止了花期。增加花粉负载会逐渐增加结实率，并将花的寿命缩短至授粉后一天。授粉后 8 小时即可检测到离区的弱化，而花粉管仍在柱头区，这表明刺激物以最小 4 毫米/小时的速度通过花柱和子房传递。授粉后不久，去除柱头就可以防止授粉诱导的花冠脱落。后来，需要去除柱头和上部花柱，甚至整个花柱才能延迟脱落。柱头和花柱的逐渐诱导以 1.5 毫米/小时的速度发生，快于以 0.75 毫米/小时生长的花粉管。向柱头或花柱涂抹吲哚乙酸（IAA）不可能复制授粉的效果。
