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Regulation of bolting and identification of the alpha-tubulin gene family in Brassica rapa L. ssp pekinensis

文献类型： 外文期刊

作者： Zhang, Y. W. 1 ; Jin, D. 1 ; Xu, C. 1 ; Zhang, L. 1 ; Guo, M. H. 1 ; Fang, Z. Y. 3 ;

作者机构： 1.Northeast Agr Univ, Coll Hort, Harbin, Peoples R China

2.Minist Agr, Key Lab Biol & Genet Improvement Hort Crops North, Harbin, Peoples R China

3.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Beijing 100193, Peoples R China

关键词： Brassica rapa;alpha-tubulin gene;Identification;Expression

期刊名称：GENETICS AND MOLECULAR RESEARCH （ 影响因子：0.764； 五年影响因子：0.912 ）

ISSN： 1676-5680

年卷期： 2016 年 15 卷 1 期

页码：

收录情况： SCI

摘要： Microtubules are important components of eukaryotic cells, and they play vital roles in cell morphogenesis, carrying of signaling molecules, transport of materials, and establishing the cell polarity. During bolting of biennial plants, cell division and elongation are involved, and cell elongation inevitably involves the microtubules arrangement and expression of related genes. So we deduce that it is of great significance to figure out the mechanism of bolting and flowering in which TUA genes are involved. In the present study, bioinformatic methods were used to predict and identify the alpha-tubulin gene family (BrTUAs) in Brassica rapa L. ssp pekinensis (Chinese cabbage) through the alignment of AtTUA gene sequence from Arabidopsis thaliana with the B. rapa genome database (http://brassicadb. org/brad/) using the basic local alignment search tool. The change in the structure and functions of BrTUAs during the process of evolution, cis-acting elements in the promoter sequences of BrTUAs, and the expression of the identified genes was also analyzed. Twelve members of the alpha-tubulin gene family were identified from Chinese cabbage. The gene length, intron, exon, and promoter regions were determined to have changed significantly during the genome evolution. Only five of the 12 members were encoded completely and were observed to differ in their spatial and temporal expression. The five BrTUA promoter sequences contained different numbers of cis-elements responsive to light and low-temperature response, cis-elements responsive among which hormonal responses were significantly different. We also report that the BrTUAs were involved in the regulation of the bolting in Chinese cabbage, and propose that this process could be controlled by regulating the expression of BrTUAs.

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