Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Aichi, Japan.
Int Rev Cell Mol Biol. 2011;289:89-115. doi: 10.1016/B978-0-12-386039-2.00003-1.
Uptake of CO(2), transpiration, and efflux of O(2) by plants through stomatal pores are indispensable aspects for survival, not only in terrestrial plants but other organisms as well. Stomatal opening is mediated by many environmental and endogenous signals, of which blue light is known to be the most effective signal. Recent investigations have revealed that blue light-induced stomatal opening, mediated by phototropins, is driven by activation of the plasma membrane H(+)-ATPase in guard cells. Moreover, blue light induces activation of H(+)-ATPase via phosphorylation of a penultimate threonine (Thr) in H(+)-ATPase and subsequent binding of the 14-3-3 protein to the phosphorylated H(+)-ATPase. These advances provide novel insights into the blue light-signaling pathway in plants and a regulatory mechanism of the plasma membrane H(+)-ATPase, the first transporter for transport of numerous solutes in plant cells, in response to physiological signals.
植物通过气孔吸收 CO2、蒸腾和释放 O2，这是生存所必需的，不仅在陆生植物中如此，在其他生物中也是如此。气孔的开启受许多环境和内源性信号的调节，其中蓝光被认为是最有效的信号。最近的研究表明，蓝光通过光受体介导的气孔开启，是由保卫细胞质膜 H+ -ATPase 的激活驱动的。此外，蓝光通过磷酸化 H+ -ATPase 中的倒数第三个苏氨酸（Thr）和随后将 14-3-3 蛋白结合到磷酸化的 H+ -ATPase 上来诱导 H+ -ATPase 的激活。这些进展为植物中蓝光信号通路以及质膜 H+ -ATPase的调节机制提供了新的见解，质膜 H+ -ATPase 是植物细胞中许多溶质运输的第一载体，对生理信号做出响应。
