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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Pump up the volume - a central role for the plasma membrane H~+ pump in pollen germination and tube growth
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Pump up the volume - a central role for the plasma membrane H~+ pump in pollen germination and tube growth

机译：增大体积-质膜H〜+泵在花粉萌发和管生长中的核心作用

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摘要

The plasma membrane H~+ ATPase is a member of the P-ATPase family transporting H~+ from the cytosol to the extracellular space and thus energizing the plasma membrane for the uptake of ions and nutrients. As a housekeeping gene, this protein can be detected in almost every plant cell including the exclusive expression of specific isoforms in pollen grains and tubes where its activity is a prerequisite for successful germination and growth of pollen tubes. This review summarizes the current knowledge on pollen PMH~+ ATPases and hypothesizes a central role for pollen-specific isoforms of this protein in tube growth. External as well as cytosolic signals from signal transduction and metabolic pathways are integrated by the PM H~+ ATPase and directly translated to tube growth rates, allocating the PMH~+ ATPase to an essential node in the signalling network of pollen tubes in their race to the ovule.
机译：质膜H〜+ ATPase是P-ATPase家族的成员，可将H〜+从胞质溶胶转运到细胞外空间，从而为质膜提供能量以吸收离子和养分。作为管家基因，这种蛋白质几乎可以在每个植物细胞中检测到，包括在花粉粒和花粉管中特定同工型的唯一表达，其中花粉管的活性是花粉管成功发芽和生长的前提。这篇综述总结了有关花粉PMH〜+ ATPase的最新知识，并推测了该蛋白的花粉特异性同工型在试管生长中的重要作用。 PM H〜+ ATPase整合了来自信号转导和代谢途径的外部信号和胞浆信号，并将其直接转化为试管的生长速率，从而将PMH〜+ ATPase分配给了花粉管在其竞争中的信号网络中的重要节点，胚珠。

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