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  • Title: Evaluation of ethylene as a mediator of gravitropism by tomato hypocotyls.
    Author: Harrison MA, Pickard BG.
    Journal: Plant Physiol; 1986; 80(2):592-5. PubMed ID: 11539038.
    Abstract:
    Assessments of the participation of ethylene in gravitropism by hypocotyls of tomato (Lycopersicon esculentum Mill.) indicate that gravitropism can occur without substantial change in ethylene production. Moreover, lowering or evaluating ethylene over a considerable range, as well as inhibiting ethylene action, fails to influence gravitropic bending. This vitiates the possibility that ethylene is a mediator of the primary, negative gravitropic response of tomato shoots.
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