Effect of Asymmetric Auxin Application on Helianthus Hypocotyl Curvature | Zendy

Fernando Migliaccio | Zendy; David L. Rayle | Zendy

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Effect of Asymmetric Auxin Application on Helianthus Hypocotyl Curvature

Author(s) -

Fernando Migliaccio,

David L. Rayle

Publication year - 1989

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.91.2.466

Subject(s) - hypocotyl , auxin , helianthus annuus , sunflower , clinostat , helianthus , gravitropism , botany , indole 3 acetic acid , biology , chemistry , horticulture , biochemistry , arabidopsis , mutant , gene

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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