Cell mechanics of pollen tube growth
Cell mechanics of pollen tube growth
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DOI：
10.1016/j.gde.2018.03.008
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发表时间：
2018-08-01
影响因子：
4
通讯作者：
Geitmann, Anja
中科院分区：
文献类型：
--
作者：
Cameron, Christine;Geitmann, Anja
花粉管具有特殊的性状，只有当细胞生物学与细胞力学概念相结合时才能理解。首先，生长速率的规律性时间变化由被认为涉及机械敏感离子通道的反馈机制控制。其次，该管利用侵入性生长穿透花组织，目的是将雄性精子细胞运送到目标。第三，花粉管能够在暴露于引导信号时重新定向其生长方向;转向机制涉及细胞内运输过程的复杂编排。先进的成像和显微操作技术有助于表征植物生殖周期中这一关键细胞的生物力学特征。
The pollen tube features particular traits that can only be understood when integrating cell biological with cell mechanical concepts. Firstly, regular temporal variations in the growth rate are governed by a feedback mechanism thought to involve mechanosensitive ion channels. Secondly, the tube uses invasive growth to penetrate the flower tissues with the aim to transport the male sperm cells to their target. Thirdly, the pollen tube is able to reorient its growth direction upon exposure to a guidance cue; the steering mechanism involves the sophisticated choreography of intracellular transport processes. Sophisticated imaging and micromanipulation techniques have been instrumental for the advancement in characterizing the biomechanical features of this crucial cell in the plant reproductive cycle.