TAA1-mediated auxin biosynthesis is essential for hormone crosstalk and plant development

被引：923

作者：

Stepanova, Anna N. ^{[1
]}

Robertson-Hoyt, Joyce ^{[1
]}

Yun, Jeonga ^{[1
]}

Benavente, Larissa M. ^{[1
]}

Xie, De-Yu ^{[2
]}

Dolezal, Karel ^{[3
,4
]}

Schlereth, Alexandra ^{[5
]}

Juergens, Gerd ^{[5
]}

Alonso, Jose M. ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Genet, Raleigh, NC 27695 USA

[2] N Carolina State Univ, Dept Plant Biol, Raleigh, NC 27695 USA

[3] Palacky Univ, Lab Growth Regulators, CZ-78371 Olomouc, Czech Republic

[4] Inst Expt Bot ASCR, CZ-78371 Olomouc, Czech Republic

[5] Univ Tubingen, D-72076 Tubingen, Germany

来源：

CELL | 2008年 / 133卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.cell.2008.01.047

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Plants 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.

引用

页码：177 / 191

页数：15

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