PMID: 16636440Apr 26, 2006Paper

Brassinosteroid signals control expression of the AXR3/IAA17 gene in the cross-talk point with auxin in root development

Bioscience, Biotechnology, and Biochemistry
Hoyeun KimSang-Gu Kim

Abstract

Transgenic plants overexpressing AXR3/IAA17 were impaired in root growth. Specifically, they exhibited severe defects in lateral root and root hair development similar to the root phenotypes of epi-brassinolide (epiBL)-treated wild-type plants. Here, we investigated the involvement of AXR3/IAA17 gene expression in brassinosteroid (BR)-regulated root development. Exogenous epiBL application significantly induced expression of the AXR3/IAA17 gene as well as several Aux/IAA genes, such as AXR2/IAA7, SLR/IAA14, and IAA28. We analyzed the transcription levels of several Aux/IAA genes related to root development in the BR signaling mutant bri1 and the BR biosynthesis mutant det2. AXR3/IAA17 gene expression was significantly decreased in bri1 plants. In det2 plants, expression of AXR3/IAA17 slightly decreased. This in turn suggests that epiBL induced these Aux/IAA genes, and that these induced gene products might function as factors in root development. Furthermore, AXR3/IAA17 might be involved in the BR signaling pathway, suggesting an intersection node of BR-auxin signaling in root development.

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Citations

May 26, 2010·Functional & Integrative Genomics·SuiKang WangYanHua Qi
Nov 22, 2011·Plant Physiology·Cristina L Walcher, Jennifer L Nemhauser
Jan 12, 2013·Plant Cell Reports·Hoai Nguyen NguyenHojoung Lee
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Dec 25, 2015·Molecular Plant·Zhuoyun Wei, Jia Li
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Jun 19, 2013·Journal of Integrative Plant Biology·Michael P Wierzba, Frans E Tax
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Jun 2, 2010·Plant Signaling & Behavior·Shanshan ZhangXuelu Wang
Jan 31, 2017·Trends in Plant Science·Victoria MironovaKlaus Palme
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Feb 7, 2018·Frontiers in Plant Science·Huiyu TianZhaojun Ding
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Sep 4, 2018·Frontiers in Plant Science·Stacey NovakJazmin de León
Jun 3, 2021·International Journal of Molecular Sciences·Manvi SharmaAshverya Laxmi

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