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PART E. THIGMOTROPISM A less spectacular tropism than gravitropism is thigmotropism, a response to contact with a solicd object. One of the most common examples of thigmotropism is exhibited by tendrils, modified leaves or stems that wrap around objects with which they come in contact. How might you explain the tendrils responses to contact with an object in terms of cell elongation? 17.
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in thigmotropism,tendril wrap around objects with which they came in contact.Tendril coiling show differential growth pattern because its only some part is in contact or in touch with the object.cells which are not in contact with the object/stimulii will elongate faster.Auxin play a role in this differential growth pattern.More concentration of auxin will accumulate in that part which do not show any contact with the object so cells of that untouched part will grow longer than the touched part.

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