ABSCISIC-ACID SIGNALING
ABSCISIC-ACID SIGNALING
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DOI：
10.1016/0955-0674(95)80033-6
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发表时间：
1995-04-01
影响因子：
7.5
通讯作者：
GIRAUDAT, J
中科院分区：
文献类型：
--
作者：
GIRAUDAT, J
植物激素脱落酸（阿坝）调节种子的发育和萌发，以及营养组织对环境胁迫条件的适应。在过去的一年中，相当多的见解已经获得了复杂的信号网络，介导阿坝的行动的分子性质。生物物理学研究表明，阿坝在气孔保卫细胞中的作用至少有一部分与细胞内受体有关。此外，越来越多的证据支持这样的观点，即保卫细胞含有多余的阿坝转导途径，细胞质Ca 2+作为第二信使在至少一个这些途径。最后，拟南芥中的突变分析表明，阿坝在整个植物水平上的多重效应是由一个高度分歧的信号网络的重叠分支介导的。两个决定阿坝敏感性的拟南芥基因座已经被克隆，并发现编码蛋白磷酸酶和转录激活因子。
The plant hormone abscisic acid (ABA) regulates the development and germination of seeds, as well as the adaptation of vegetative tissues to conditions of environmental stress. During the past year, considerable insights have been gained into the molecular nature of the complex signaling network that mediates the actions of ABA. Biophysical studies indicate that at least some of the effects of ABA in stomatal guard cells involve intracellular receptors. Also, increasing evidence supports the view that guard cells contain redundant ABA transduction pathways, and that cytoplasmic Ca2+ acts as a second messenger in at least one of these pathways. Finally, mutational analysis in Arabidopsis indicates that the multiple effects of ABA at the whole plant level are mediated by overlapping branches of a highly ramified signaling network. Two Arabidopsis loci that determine ABA sensitivity have already been cloned and found to encode a protein phosphatase and a transcriptional activator.