Biology Department, Pennsylvania State University, University Park, PA 16802, USA.
J Exp Bot. 2013 Nov;64(15):4663-80. doi: 10.1093/jxb/ert204. Epub 2013 Aug 3.
The ability to sense and respond to a wide variety of mechanical stimuli-gravity, touch, osmotic pressure, or the resistance of the cell wall-is a critical feature of every plant cell, whether or not it is specialized for mechanotransduction. Mechanoperceptive events are an essential part of plant life, required for normal growth and development at the cell, tissue, and whole-plant level and for the proper response to an array of biotic and abiotic stresses. One current challenge for plant mechanobiologists is to link these physiological responses to specific mechanoreceptors and signal transduction pathways. Here, we describe recent progress in the identification and characterization of two classes of putative mechanoreceptors, ion channels and receptor-like kinases. We also discuss how the secondary messenger Ca(2+) operates at the centre of many of these mechanical signal transduction pathways.
能够感知和响应各种机械刺激——重力、触摸、渗透压或细胞壁的阻力——是每个植物细胞的关键特征，无论其是否专门用于机械转导。机械感知事件是植物生命的重要组成部分，对于细胞、组织和整个植物水平的正常生长和发育以及对一系列生物和非生物胁迫的适当反应都是必需的。目前，植物机械生物学家面临的一个挑战是将这些生理反应与特定的机械感受器和信号转导途径联系起来。在这里，我们描述了在鉴定和表征两类假定的机械感受器——离子通道和类受体激酶方面的最新进展。我们还讨论了第二信使 Ca(2+) 如何在许多这些机械信号转导途径的中心发挥作用。
