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Localization and identification of auxin in roots ofZea mays

โœ Scribed by M. S. Greenwood; J. R. Hillman; S. Shaw; M. B. Wilkins

Publisher
Springer-Verlag
Year
1973
Tongue
English
Weight
317 KB
Volume
109
Category
Article
ISSN
0032-0935

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โœฆ Synopsis

Roots of 3.5-day-old seedlings of Zea mays cv. Giant White Horsetooth contain an extractable auxin which has chromatographic properties and reactions to chromogenic sprays identical with those of indole-3-acetic acid (IAA). By separating stele from cortex (and root tips) before extraction it was shown that the auxin is localized predominantly in the stele, with little being found in the cortex. Whole roots, isolated cortices and isolated steles accumulate and metabolize exogenously applied IAA-1-(14)C. The stelar tissue is distinguished from whole roots and cortical tissue in having a different pattern of IAA metabolism.

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