Heterologous overexpression of the GbTCP5 gene increased root hair length, root hair and stem trichome density, and lignin content in transgenic Arabidopsis
文献类型： 外文期刊
作者： Wang, Yi 1 ; Yu, Yuehua 1 ; Wang, Junduo 2 ; Chen, Quanjia 1 ; Ni, Zhiyong 1 ;
作者机构： 1.Xinjiang Agr Univ, Coll Agron, Urumqi 830052, Peoples R China
2.Xinjiang Acad Agr Sci, Econ Crop Res Inst, Urumqi 830000, Peoples R China
关键词： Sea-island cotton; GbTCP5; Root hair; Lignin
期刊名称：GENE （ 影响因子：3.688； 五年影响因子：3.329 ）
ISSN： 0378-1119
年卷期： 2020 年 758 卷
页码：
收录情况： SCI
摘要： Teosinte branched1/cycloidea/proliferating cell factor1 (TCP) is a plant-specific protein family member in volved in plant growth and development. However, the functions of most members of the cotton TCP family are unknown. In this study, the GbTCP5 gene encodes a sea-island cotton class II TCP CIN subclass transcription factor. The GbTCP5 transcription factor is located in the nucleus, has transcriptional activation activity, and can bind to TCP II cis-acting elements. GbTCP5 was widely expressed in tissues with the highest transcript level in the calyx. GbTCP5 is expressed at different developmental stages of the fiber and has significantly high transcriptional level expression in the fibers at 20, 30 and 35 days post anthesis (DPA). Heterologous overexpression of the GbTCP5 gene increased root hair length, root hair and stem trichome density, and stem lignin content in transgenic Arabidopsis compared to the wild type (WT). GbTCP5 binds the promoters of the GL3, EGL3, CPC, MYB46, LBD30, CesA4, VND7, CCOMT1, and CAD5 genes to upregulate their expression. Moreover, the homologous genes of these genes are expressed in the fibers of different developmental stages of the sea-island cotton fiber. These results indicate that GbTCP5 regulates root hair development and secondary wall formation in Arabidopsis and may be a candidate gene for improving cotton fiber quality.
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