TAA1-mediated auxin biosynthesis is essential for hormone crosstalk and plant development.
By A. Stepanova, J. Robertson-Hoyt, Jeonga Yun, Larissa M Benavente, D. Xie, K. Doležal, A. Schlereth, G. Jürgens, José M. Alonso. Cell, 2008
1,145 citations recorded by the source corpus.
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.
Subfields: Molecular Biology, Plant Science
View Paper: https://www.semanticscholar.org/paper/e8af2a926bb50fb487e84525be511f697ed2b718
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Citations in the corpus
- Rapid synthesis of auxin via a new tryptophan-dependent pathway is required for shade avoidance in plants. (2008, positive): “In this issue, Stepanova et al. (2008) and Tao et al. (2008) reveal that a small family of tryptophan aminotransferases catalyze formation of indole-3-pyruvic acid (IPA) from L-tryptophan (L-Trp), the first step in a pathway for auxin biosynthesis.”
- Hormone balance and abiotic stress tolerance in crop plants. (2011, background): “Among them, are the auxin-responsive factors ARF2 and ARF19 [23,24], the auxin transporters PIN1, PIN2, PIN4, AUX1 [25], and genes encoding auxin biosynthetic enzymes (ASA1/WEI2/TIR7, ASB1/WEI7, TAA1/SAV3/ WEI8) [26,27 ].”
- Plant hormones are versatile chemical regulators of plant growth. (2009, background): “For example, several genes required for auxin biosynthesis are under transcriptional control of ethylen”
- Recent Advances in Hormonal Regulation and Cross-Talk during Non-Climacteric Fruit Development and Ripening (2019, background): “In Arabidopsis [112–116] it was reported that IAA is synthesized by a two-step pathway, in which, the family of TRYPTOPHAN AMINOTRANSFERASE OF ARABIDOPSIS1/TRYPTOPHAN AMINOTRANSFERASE RELATED (TAA1/TAR) proteins [115,116] transform tryptophan to indole-3-pyruvate which is then converted to IAA by th”
- Auxin control of root development. (2010, background): “Finally, three groups working on independent mutants, wei8 (Stepanova et al. 2008), sav3 (Tao et al. 2008), and tir2 (Yamada et al. 2009), with auxin-related phenotypes showed that their mutants fall in an aminotransferase (TRYPTOPHAN AMINOTRANSFERASE of Arabidopsis, TAA).”
- Conversion of tryptophan to indole-3-acetic acid by TRYPTOPHAN AMINOTRANSFERASES OF ARABIDOPSIS and YUCCAs in Arabidopsis (2011, background): “In fact, the juvenile plants of wei8 tar2-1 were similar to those plants of yuc1 yuc2 yuc4 yuc6 quadruple mutants (6, 8).”
- Trichoderma virens, a Plant Beneficial Fungus, Enhances Biomass Production and Promotes Lateral Root Growth through an Auxin-Dependent Mechanism in Arabidopsis1[C][W][OA] (2009, background): “Vol. 149, 2009 1587 synthesizing microorganisms (Koga, 1995), and recently it was demonstrated that it operates in plants as well (Stepanova et al., 2008; Tao et al., 2008).”
- Auxin receptors and plant development: a new signaling paradigm. (2008, background): “TAA1/TIR2 is an aminotransferase involved in auxin biosynthesis (Stepanova et al. 2008, Tao et al. 2008; M. Yamada, P. Jensen & M. Estelle, unpublished).”
- Plant Growth Promoting Characteristics in Some Flavobacterium spp. Isolated from Soils of Iran (2010, background): “PGPR can stimulate plant growth directly as they can improve the supply of nutrients, such as nitrogen (Dobbelaere et al., 2003) and phosphorous (Rashid et al., 2004) or by production of phytohormones (Choong et al., 2003; Stepanova et al., 2008) and ACC-deaminase synthesis (Arshad et al., 2007).”
- Auxin: a trigger for change in plant development. (2009, neutral): “In mutants defective in TAA genes, free IAA levels were reduced, demonstrating that the TAA-dependent IPA pathway contributes to IAA production (Stepanova et al., 2008; Tao et al., 2008).”
- Auxin biosynthesis and its role in plant development (2010, background): “For example, yuc1 yuc4 yuc10 yuc11 quadruple mutants do not make hypocotyls and roots, a phenotype that is also displayed in taa1 tar1 tar2 triple mutants (9, 56).”