植物细胞器钙信号研究进展

Organellar Calcium Signaling in Plants

钙离子(Ca2+)作为细胞内重要的第二信使,在植物生长发育以及外界信号响应方面具有重要作用。当植物受到外界环境刺激时,细胞质中Ca2+浓度出现特异性升高,细胞通过这些钙信号将信息传递到下游,从而产生正确的应答反应。目前,植物中的钙信号研究主要集中于Ca2+在细胞中的转运以及对钙信号的解码等方面。而越来越多的研究表明,细胞器作为细胞重要的Ca2+储存场所,在钙信号产生过程中具有重要的作用。许多细胞器不仅自身存在特异的钙信号,还能参与胞质中钙信号的形成。本文就钙信号途径中植物细胞器功能的最新研究进展进行了综述。

Plants have adopted the calcium ion（Ca^2＋） as a versatile second messenger in the regulation of plant development and environmental responses. Cytoplasmic Ca^2＋（[Ca^2＋]cyt） elevation induced by various signals is responsible for appropriate downstream responses. So far in plants, most of the research on calcium signaling has been focused on the transport mechanisms of Ca^2＋ as well as the components involved in decoding of calcium signals. Recently, increasing evidence suggests that organelles which serve as calcium stores in plants not only undergo calcium regulation themselves, but also are able to infl uence the Ca^2＋ signaling in cytoplasm. This review provides a brief overview of calcium regulation in different cellular compartments and emerging roles of organelles in calcium signaling.