GH3 Auxin-Amido Synthetases Alter the Ratio of Indole-3-Acetic Acid and Phenylacetic Acid in Arabidopsis
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- Yuki Aoi
- Department of Bioregulation and Biointeraction, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, 183-8509 Japan
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- Keita Tanaka
- Laboratory of Biochemistry, Wageningen University & Research, Wageningen 6708 WE, the Netherlands
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- Sam David Cook
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, 183-8509 Japan
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- Ken-Ichiro Hayashi
- Department of Biochemistry, Okayama University of Science, Okayama, 700-0005 Japan
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- Hiroyuki Kasahara
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Fuchu, 183-8509 Japan
書誌事項
- 公開日
- 2019-12-06
- 資源種別
- journal article
- 権利情報
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- http://creativecommons.org/licenses/by-nc/4.0/
- DOI
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- 10.1093/pcp/pcz223
- 公開者
- Oxford University Press (OUP)
この論文をさがす
説明
<jats:title>Abstract</jats:title> <jats:p>Auxin is the first discovered plant hormone and is essential for many aspects of plant growth and development. Indole-3-acetic acid (IAA) is the main auxin and plays pivotal roles in intercellular communication through polar auxin transport. Phenylacetic acid (PAA) is another natural auxin that does not show polar movement. Although a wide range of species have been shown to produce PAA, its biosynthesis, inactivation and physiological significance in plants are largely unknown. In this study, we demonstrate that overexpression of the CYP79A2 gene, which is involved in benzylglucosinolate synthesis, remarkably increased the levels of PAA and enhanced lateral root formation in Arabidopsis. This coincided with a significant reduction in the levels of IAA. The results from auxin metabolite quantification suggest that the PAA-dependent induction of GRETCHEN HAGEN 3 (GH3) genes, which encode auxin-amido synthetases, promote the inactivation of IAA. Similarly, an increase in IAA synthesis, via the indole-3-acetaldoxime pathway, significantly reduced the levels of PAA. The same adjustment of IAA and PAA levels was also observed by applying each auxin to wild-type plants. These results show that GH3 auxin-amido synthetases can alter the ratio of IAA and PAA in plant growth and development.</jats:p>
収録刊行物
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- Plant and Cell Physiology
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Plant and Cell Physiology 61 (3), 596-605, 2019-12-06
Oxford University Press (OUP)