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. 1989;91(2):466-8.
doi: 10.1104/pp.91.2.466.

Effect of asymmetric auxin application on Helianthus hypocotyl curvature

F Migliaccio  1 , D L Rayle
Collaborators, Affiliations

Effect of asymmetric auxin application on Helianthus hypocotyl curvature

F Migliaccio et al. Plant Physiol. 1989.

Abstract

Indole-3-acetic acid was applied asymmetrically to the hypocotyls of sunflower (Helianthus annuus L.) seedlings. After 5 hours on a clinostat, auxin gradients as small as 1 to 1.3 produced substantial (more than 60 degrees) hypocotyl curvature. This result suggests the asymmetric growth underlying hypocotyl gravitropism can be explained by lateral auxin redistribution.

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