Overexpression of OsRAA1 causes pleiotropic phenotypes in transgenic rice plants, including altered leaf, flower, and root development and root response to gravity

Plant Physiology
Lei GeKang Chong

Abstract

There are very few root genes that have been described in rice as a monocotyledonous model plant so far. Here, the OsRAA1 (Oryza sativa Root Architecture Associated 1) gene has been characterized molecularly. OsRAA1 encodes a 12.0-kD protein that has 58% homology to the AtFPF1 (Flowering Promoting Factor 1) in Arabidopsis, which has not been reported as modulating root development yet. Data of in situ hybridization and OsRAA1::GUS transgenic plant showed that OsRAA1 expressed specifically in the apical meristem, the elongation zone of root tip, steles of the branch zone, and the young lateral root. Constitutive expression of OsRAA1 under the control of maize (Zea mays) ubiquitin promoter resulted in phenotypes of reduced growth of primary root, increased number of adventitious roots and helix primary root, and delayed gravitropic response of roots in seedlings of rice (Oryza sativa), which are similar to the phenotypes of the wild-type plant treated with auxin. With overexpression of OsRAA1, initiation and growth of adventitious root were more sensitive to treatment of auxin than those of the control plants, while their responses to 9-hydroxyfluorene-9-carboxylic acid in both transgenic line and wild type showed similar results...Continue Reading

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Citations

Jan 25, 2005·Plant Cell Reports·Ming-Li XuKang Chong
May 17, 2011·Plant Cell Reports·Shu-Jen WangHsiang-Wen Chen
Dec 14, 2011·Journal of Experimental Botany·Patrick KabouwArjen Biere
Feb 4, 2012·Journal of Experimental Botany·An YangWen-Hao Zhang
Sep 23, 2014·Trends in Plant Science·Robert MeisterDaniel P Schachtman
Dec 15, 2015·Journal of Experimental Botany·Xiaoyan DaiWen-Hao Zhang
Sep 17, 2009·Plant Biotechnology Journal·Dan LiKang Chong
Sep 12, 2009·Physiologia Plantarum·Hisayo ShimizuKotaro T Yamamoto
Oct 25, 2006·The Plant Journal : for Cell and Molecular Biology·Xiaolei ZhuangKang Chong
Mar 3, 2015·Cell·Yun MaKang Chong
Oct 5, 2012·Molecular Plant·Jefri Heyman, Lieven De Veylder
Dec 29, 2009·Plant Signaling & Behavior·Yunyuan XuKang Chong

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