Israelsson Maria, Siegel Robert S, Young Jared, Hashimoto Mimi, Iba Koh, Schroeder Julian I
Division of Biological Sciences, Cell and Developmental Biology Section, and Center for Molecular Genetics 0116, University of California, San Diego, La Jolla, California 92093-0116, USA.
Curr Opin Plant Biol. 2006 Dec;9(6):654-63. doi: 10.1016/j.pbi.2006.09.006. Epub 2006 Sep 28.
Stomatal pores in the epidermis of plants enable gas exchange between plants and the atmosphere, a process vital to plant life. Pairs of specialized guard cells surround and control stomatal apertures. Stomatal closing is induced by abscisic acid (ABA) and elevated CO(2) concentrations. Recent advances have been made in understanding ABA signaling and in characterizing CO(2) transduction mechanisms and CO(2) signaling mutants. In addition, models of Ca(2+)-dependent and Ca(2+)-independent signaling in guard cells have been developed and a new hypothesis has been formed in which physiological stimuli are proposed to prime Ca(2+) sensors, thus enabling specificity in Ca(2+)-dependent signal transduction.
植物表皮上的气孔使植物与大气之间能够进行气体交换，这一过程对植物生命至关重要。成对的特化保卫细胞围绕并控制气孔孔径。脱落酸（ABA）和升高的二氧化碳浓度会诱导气孔关闭。在理解ABA信号传导以及表征二氧化碳转导机制和二氧化碳信号突变体方面取得了最新进展。此外，还建立了保卫细胞中钙依赖性和非钙依赖性信号传导模型，并形成了一个新的假说，即生理刺激被认为会使钙传感器启动，从而在钙依赖性信号转导中实现特异性。
