Multiple Facets of Arabidopsis Seedling Development Require Indole-3-Butyric Acid–Derived Auxin

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dc.citation.firstpage984
dc.citation.journalTitleThe Plant Cell
dc.citation.lastpage999
dc.citation.volumeNumber23
dc.contributor.authorStrader, Lucia C.
dc.contributor.authorWheeler, Dorthea L.
dc.contributor.authorChristensen, Sarah E.
dc.contributor.authorBerens, John C.
dc.contributor.authorCohen, Jerry D.
dc.contributor.authorRampey, Rebekah A.
dc.contributor.authorBartel, Bonnie
dc.date.accessioned2018-07-10T18:32:39Z
dc.date.available2018-07-10T18:32:39Z
dc.date.issued2011
dc.description.abstractLevels of auxin, which regulates both cell division and cell elongation in plant development, are controlled by synthesis, inactivation, transport, and the use of storage forms. However, the specific contributions of various inputs to the active auxin pool are not well understood. One auxin precursor is indole-3-butyric acid (IBA), which undergoes peroxisomal β-oxidation to release free indole-3-acetic acid (IAA). We identified ENOYL-COA HYDRATASE2 (ECH2) as an enzyme required for IBA response. Combining the ech2 mutant with previously identified iba response mutants resulted in enhanced IBA resistance, diverse auxin-related developmental defects, decreased auxin-responsive reporter activity in both untreated and auxin-treated seedlings, and decreased free IAA levels. The decreased auxin levels and responsiveness, along with the associated developmental defects, uncover previously unappreciated roles for IBA-derived IAA during seedling development, establish IBA as an important auxin precursor, and suggest that IBA-to-IAA conversion contributes to the positive feedback that maintains root auxin levels.
dc.identifier.citationStrader, Lucia C., Wheeler, Dorthea L., Christensen, Sarah E., et al.. "Multiple Facets of Arabidopsis Seedling Development Require Indole-3-Butyric Acid–Derived Auxin." <i>The Plant Cell,</i> 23, (2011) American Society of Plant Biologists: 984-999. https://doi.org/10.1105/tpc.111.083071.
dc.identifier.digital984
dc.identifier.doihttps://doi.org/10.1105/tpc.111.083071
dc.identifier.urihttps://hdl.handle.net/1911/102360
dc.language.isoeng
dc.publisherAmerican Society of Plant Biologists
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.titleMultiple Facets of Arabidopsis Seedling Development Require Indole-3-Butyric Acid–Derived Auxin
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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