TAA1-Mediated Auxin Biosynthesis Is Essential for Hormone Crosstalk and Plant Development
In: Cell, Jg. 133 (2008-04-01), S. 177-191
Online
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Zugriff:
SummaryPlants have evolved a tremendous ability to respond to environmental changes by adapting their growth and development. The interaction between hormonal and developmental signals is a critical mechanism in the generation of this enormous plasticity. A good example is the response to the hormone ethylene that depends on tissue type, developmental stage, and environmental conditions. By characterizing the Arabidopsis wei8 mutant, we have found that a small family of genes mediates tissue-specific responses to ethylene. Biochemical studies revealed that WEI8 encodes a long-anticipated tryptophan aminotransferase, TAA1, in the essential, yet genetically uncharacterized, indole-3-pyruvic acid (IPA) branch of the auxin biosynthetic pathway. Analysis of TAA1 and its paralogues revealed a link between local auxin production, tissue-specific ethylene effects, and organ development. Thus, the IPA route of auxin production is key to generating robust auxin gradients in response to environmental and developmental cues.
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TAA1-Mediated Auxin Biosynthesis Is Essential for Hormone Crosstalk and Plant Development
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Autor/in / Beteiligte Person: | Doležal, Karel ; Jürgens, Gerd ; Alonso, Jose M. ; Benavente, Larissa M. ; Robertson-Hoyt, Joyce ; Schlereth, Alexandra ; Stepanova, Anna ; Xie, De-Yu ; Yun, Jeonga |
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Zeitschrift: | Cell, Jg. 133 (2008-04-01), S. 177-191 |
Veröffentlichung: | Elsevier BV, 2008 |
Medientyp: | unknown |
ISSN: | 0092-8674 (print) |
DOI: | 10.1016/j.cell.2008.01.047 |
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