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ISSN: 2329-9029

Journal of Plant Biochemistry & Physiology
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Editorial

Decrease of Auxin Binding Protein 1 Gene Expression Alters Shoot Development in Ramie

Xuewen Zhang1*, Lihua Huang1, Yan Zhao1, Chao Hu1, Qingquan Guo2 and Jianrong Chen2
1College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
2Department of Bioengineering & Environmental Science, Changsha University, Changsha 410003, China
Corresponding Author : Xuewen Zhang
College of Bioscience and Biotechnology
Hunan Agricultural University, Changsha 410128, China
Tel: 86-731-84618060, 84618784
E-mail: [email protected]
Received March 19, 2014; Accepted April 21, 2014; Published April 28, 2014
Citation: Zhang X, Huang L, Zhao Y, Hu C, Guo Q, et al. (2014) Decrease of Auxin Binding Protein 1 Gene Expression Alters Shoot Development in Ramie. J Plant Biochem Physiol 2:125. doi:10.4172/2329-9029.1000125
Copyright: © 2014 Zhang X, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

AUXIN BINDING PROTEIN1 (ABP1) has long been proposed as a candidate of auxin receptor to mediate auxin action in plants. It is essential for plant organ development. The function of ABP1 in the development of ramie (Boehmeria nivea L.) remains unclear. Here, we examined the role of the ABP1 gene in the development of shoot in ramie, especially in leaf venation ontogeny, by transforming ABP1 antisense construct into the plants. We showed that ABP1 expression was decreased in ABP1 antisense transgenic plantlets. The decrease of ABP1 expression led to defects in plant growth including dwarf plant, and decreased apical dominance in the intact plant. In addition, ABP1 antisense lines exhibited a serious retard of leaf development involving small and twisted leaves, sparse trichome, and a decreased cell expansion. Moreover, the decreased ABP1 expression repressed the development of leaf venation. ABP1 antisense lines developed an incomplete leaf venation, which became smaller and lacked in some leaf tissues. Though the cell arrangement was normal in midrib and lateral vein, cell size was decrease and some cell layers were missing in midrib. The abnormal phenotype of leaf venation was attributed to the decreases in cell number and size. Our data support that ABP1 is necessary for shoot growth in ramie. More importantly, it plays a key role for the development of ramie leaf venation by regulating both cell expansion and division.

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