Pollen tube attraction by the synergid cell
Pollen tube attraction by the synergid cell
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DOI：
10.1126/science.1062429
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发表时间：
2001-08-24
期刊：
影响因子：
56.9
通讯作者：
Kuroiwa, T
中科院分区：
文献类型：
--
作者：
Higashiyama, T;Yabe, S;Kuroiwa, T
在有花植物中，将花粉管引导到胚囊（单倍体雌配子体）对于成功受精至关重要。目标胚囊可以吸引花粉管作为雌蕊中的最后一步引导。我们用激光切割鲸鱼座表明，邻近卵细胞的两个助细胞吸引花粉管。单个助细胞足以产生吸引信号，两个助细胞增强了吸引信号。受精后，胚囊不再吸引花粉管，尽管一个助细胞持续存在。这种吸引力的停止可能与阻止多精受精有关。
In flowering plants, guidance of the pollen tube to the embryo sac (the haploid female gametophyte) is critical for successful fertilization. The target embryo sac may attract the pollen tube as the final step of guidance in the pistil. We show by laser Ceti ablation that two synergid cells adjacent to the egg cell attract the pollen tube. A single synergid cell was sufficient to generate an attraction signal, and two cells enhanced it. After fertilization, the embryo sac no longer attracts the pollen tube, despite the persistence of one synergid cell. This cessation of attraction might be involved in blocking polyspermy.