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Department of Biochemistry and Cell Biology, Rice University, Houston, Texas.
Plants are very sensitive to environmental stimuli and have evolved the ability to adapt to many environmental stresses by altering development. In particular, mechanical stimuli such as touch or wind, result in growth changes that result in plants with greater resistance to such mechanical stimuli. We have initiated a molecular dissection of the pathways that enable perception of and responses to these environmental stimuli in plants. We have discovered five genes--termed the TCH genes--whose expression levels are strongly and rapidly increased in response to stimuli such as touch, wind, rain, wounding and darkness. Three of the TCH genes encode proteins related to calmodulin thereby implicating roles for calcium ions and calmodulin in the transduction of signals from the environment.
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