Resistance of plants to gravitational force
Resistance of plants to gravitational force
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DOI：
10.1007/s10265-013-0572-4
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发表时间：
2013-09-01
影响因子：
2.8
通讯作者：
Soga, Kouichi
中科院分区：
文献类型：
--
作者：
Soga, Kouichi
发展对重力的抗性是陆生植物在1 x g条件下生存的关键反应。我们将这种反应称为“重力阻力”，并利用离心作用产生的超重力条件和空间微重力条件分析了其性质和机制。我们的研究结果表明，植物发展一个短而厚的身体，并增加细胞壁的刚度，以抵抗重力。身体形状的改变是由皮质微管的快速重定向引起的，这是由微管相关蛋白响应重力的大小而引起的。细胞壁刚性的改变受细胞壁代谢变化的调节，细胞壁代谢变化是由细胞壁酶水平和质外体液（细胞壁液）pH值的改变引起的。质膜上的机械感受器可能参与重力的感知。在这篇综述中，我们讨论了改变重力条件的方法，并描述了植物抗重力的性质和机制。
Developing resistance to gravitational force is a critical response for terrestrial plants to survive under 1 x g conditions. We have termed this reaction "gravity resistance" and have analyzed its nature and mechanisms using hypergravity conditions produced by centrifugation and microgravity conditions in space. Our results indicate that plants develop a short and thick body and increase cell wall rigidity to resist gravitational force. The modification of body shape is brought about by the rapid reorientation of cortical microtubules that is caused by the action of microtubule-associated proteins in response to the magnitude of the gravitational force. The modification of cell wall rigidity is regulated by changes in cell wall metabolism that are caused by alterations in the levels of cell wall enzymes and in the pH of apoplastic fluid (cell wall fluid). Mechanoreceptors on the plasma membrane may be involved in the perception of the gravitational force. In this review, we discuss methods for altering gravitational conditions and describe the nature and mechanisms of gravity resistance in plants.