Braam J, Davis R W
Department of Biochemistry, Beckman Center, Stanford University, California 94305.
Cell. 1990 Feb 9;60(3):357-64. doi: 10.1016/0092-8674(90)90587-5.
In response to water spray, subirrigation, wind, touch, wounding, or darkness, Arabidopsis regulates the expression of at least four touch-induced (TCH) genes. Ten to thirty minutes after stimulation, mRNA levels increase up to 100-fold. Arabidopsis plants stimulated by touch develop shorter petioles and bolts. This developmental response is known as thigmomorphogenesis. TCH 1 cDNA encodes the putative Arabidopsis calmodulin differing in one amino acid from wheat calmodulin. Sequenced regions of TCH 2 and TCH 3 contain 44% and 70% amino acid identities to calmodulin, respectively. The regulation of this calmodulin-related gene family in Arabidopsis suggests that calcium ions and calmodulin are involved in transduction of signals from the environment, enabling plants to sense and respond to environmental changes.
作为对喷水、底部灌溉、风、触摸、创伤或黑暗的响应，拟南芥会调节至少四个触摸诱导（TCH）基因的表达。刺激后10到30分钟，mRNA水平会增加至100倍。受触摸刺激的拟南芥植株会发育出更短的叶柄和花茎。这种发育反应被称为机械形态建成。TCH 1 cDNA编码的拟南芥钙调蛋白与小麦钙调蛋白在一个氨基酸上存在差异。TCH 2和TCH 3的测序区域与钙调蛋白的氨基酸同源性分别为44%和70%。拟南芥中这个与钙调蛋白相关的基因家族的调控表明，钙离子和钙调蛋白参与了来自环境的信号转导，使植物能够感知并响应环境变化。
