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Unformatted text preview: to close the trap once the insect touches the trigger hairs. Thigmomorphogenesis Plants have a more compact and sturdy growth pattern (called habit) when subjected to mechanical stimuli such as wind, rain (rain drops have weight) and the occasional touch by passersby. The famous Monterey Cypress is a photogenic example of the effect of prevailing winds on plant growth. A Ca ++ mediated signal transduction pathway activates genes that alter the growth patterns. Response to twice-daily touch (on left) Monterey cypress...
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- Fall '09