Himmelbach A, Iten M, Grill E
Lehrstuhl für Botanik, Technische Universität München, Germany.
Philos Trans R Soc Lond B Biol Sci. 1998 Sep 29;353(1374):1439-44. doi: 10.1098/rstb.1998.0299.
Abscisic acid (ABA) mediated growth control is a fundamental response of plants to adverse environmental cues. The linkage between ABA perception and growth control is currently being unravelled by using different experimental approaches such as mutant analysis and microinjection experiments. So far, two protein phosphatases, ABI1 and ABI2, cADPR, pH, and Ca2+ have been identified as main components of the ABA signalling pathway. Here, the ABA signal transduction pathway is compared to signalling cascades from yeast and mammalian cells. A model for a bifurcated ABA signal transduction pathway exerting a positive and negative control mechanism is proposed.
脱落酸(ABA)介导的生长调控是植物对不利环境信号的一种基本反应。目前,通过使用不同的实验方法,如突变体分析和显微注射实验,正在揭示ABA感知与生长调控之间的联系。到目前为止,两种蛋白磷酸酶ABI1和ABI2、环腺苷二磷酸核糖(cADPR)、pH值和钙离子已被确定为ABA信号通路的主要组成部分。在此,将ABA信号转导通路与酵母和哺乳动物细胞的信号级联进行了比较。提出了一种具有正负控制机制的分叉ABA信号转导通路模型。