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Thigmomorphogenesis (Thigma --> to touch in Greek) is the response by plants to mechanical sensation (touch) by altering their growth patterns. In the wild, these patterns can be evinced by wind, raindrops, and rubbing by passing animals. Botanists have long known that plants grown in a greenhouse tend to be taller and more spindly than plants grown outside. M.J. Jaffe discovered in the 1970s that regular rubbing or bending of stems inhibits their elongation and stimulates their radial expansion, resulting in shorter, stockier plants. Growth responses are caused by changes in gene expression. This is likely related to the calcium-binding protein calmodulin, suggesting Ca2+ involvement in mediating growth responses. ==References== *Biro RL, Hunt ERJr., Erner Y and Jaffe MJ (1980) Thigmomorphogenesis: Changes in cell division and elongation in the internodes of mechanically perturbed or ethrel treated bean plants. Annals of Botany 45: 655–664 *Biro RL and Jaffe MJ (1984) Thigmomorphogenesis: Ethylene evolution and its role in the changes observed in mechanically perturbed bean plants. Physiol Plant 62: 289–294 *Erner Y and Jaffe MJ (1982) Thigmomorphogenesis: The involvement of auxin and abscisic acid in growth retardation due to mechanical perturbation. Plant and Cell Physiol 23: 935–941 *Erner Y and Jaffe MJ (1983) Thigmomorphogenesis: Membrane lipid and protein changes in bean plants as affected by mechanical perturbation and ethrel. Physiol Plant 58: 197–203 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Thigmomorphogenesis」の詳細全文を読む スポンサード リンク
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