THE SIGNIFICANCE OF THE OBTURATOR IN THE CONTROL OF POLLEN-TUBE ENTRY INTO THE OVARY IN PEACH (PRUNUS-PERSICA)
THE SIGNIFICANCE OF THE OBTURATOR IN THE CONTROL OF POLLEN-TUBE ENTRY INTO THE OVARY IN PEACH (PRUNUS-PERSICA)
复制标题
DOI：
10.1093/oxfordjournals.aob.a087500
复制
发表时间：
1987-12-01
期刊：
影响因子：
4.2
通讯作者：
HERRERO, M
中科院分区：
文献类型：
--
作者：
ARBELOA, A;HERRERO, M
研究了桃（Prunus persica）闭孔器的变化及其与花粉管生长的关系。在开花期，闭孔细胞活跃，淀粉储备丰富。开花后12天，这些细胞产生一种分泌物，这种分泌物对碳水化合物和蛋白质进行染色。随着分泌物的产生，淀粉从这些细胞中消失，它们随着胼胝质的积累而退化和崩溃。分泌与污染无关，因为它在授粉和未授粉的花中以类似的方式发生。花粉管沿着闭孔器表面的生长依赖于这种分泌物，因为尽管花粉管在授粉后7天到达花柱基部，但它们直到5天后分泌物产生时才能在闭孔器上生长。这种发生在闭孔处的不连续分泌可能提供了一种控制花粉管进入桃子房的机制。
Changes in the obturator of the peach (Prunus persica) have been investigated and related to pollen tube growth in this region. At anthesis, the cells of the obturator are active and rich in starch reserves. Twelve days after anthesis these cells produce a secretion that stains for carbohydrates and for proteins. As the secretion is produced, starch vanishes from these cells and they degenerate and collapse as callose is accumulated. Secretion is independent of pollution as it takes place in a similar fashion both in pollinated and in unpollinated flowers. Pollen tube growth along the obturator surface depends on this secretion for, although pollen tubes reach the base of the style seven days after pollination, they cannot grow on the obturator until five days later, when the secretion produced. This discontinuous secretion taking place at the obturator may provide a mechanism that controls the entrance of pollen tubes into the ovary in the peach.