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Transport and metabolism of the endogenous auxin precursor indole-3-butyric acid.
Plant growth and morphogenesis depend on the levels and distribution of the plant hormone auxin. Plants tightly regulate cellular levels of the active auxin indole-3-acetic acid (IAA) through synthesis, inactivation, and transport. Although the transporters that move IAA into and out of cells are well characterized and play important roles in development, little is known about the transport of IAA precursors. In this review, we discuss the accumulating evidence suggesting that the IAA precursor indole-3-butyric acid (IBA) is transported independently of the characterized IAA transport machinery along with the recent identification of specific IBA efflux carriers and enzymes suggested to metabolize IBA. These studies have revealed important roles for IBA in maintaining IAA levels and distribution within the plant to support normal development.
Duke Scholars
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Related Subject Headings
- Plant Proteins
- Plant Biology & Botany
- Peroxisomes
- Indoles
- Indoleacetic Acids
- Biological Transport
- 3108 Plant biology
- 3105 Genetics
- 3101 Biochemistry and cell biology
- 0607 Plant Biology
Citation
![Journal cover image](https://secure.syndetics.com/index.aspx?isbn=/lc.gif&issn=1752-9867&client=dukeuniv)
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Plant Proteins
- Plant Biology & Botany
- Peroxisomes
- Indoles
- Indoleacetic Acids
- Biological Transport
- 3108 Plant biology
- 3105 Genetics
- 3101 Biochemistry and cell biology
- 0607 Plant Biology