GLABROUS INFLORESCENCE STEMS3 binds to and activates RHD2 and RHD4 genes to promote root hair elongation in Arabidopsis
文献类型： 外文期刊
作者： Huang, Linli 1 ; Xu, Nuo 1 ; Wu, Junyu 1 ; Yang, Shuaiqi 1 ; An, Lijun 3 ; Zhou, Zhongjing 4 ; Wong, Chui Eng 5 ; Wu, Mingjie 1 ; Yu, Hao 5 ; Gan, Yinbo 1 ;
作者机构： 1.Zhejiang Univ, Coll Agr & Biotechnol, Dept Agron, Hangzhou, Peoples R China
2.Shanghai Acad Agr Sci, Biotechnol Res Inst, Shanghai Key Lab Agr Genet & Breeding, Shanghai, Peoples R China
3.Northwest A&F Univ, Coll Life Sci, Yangling, Shanxi, Peoples R China
4.Zhejiang Acad Agr Sci, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou, Peoples R China
5.Natl Univ Singapore, Dept Biol Sci, Singapore, Singapore
6.Natl Univ Singapore, Temasek Life Sci Lab, Singapore, Singapore
关键词： root hair; GIS3; ethylene; cytokinin; RHD2; RHD4
期刊名称：PLANT JOURNAL （ 影响因子：7.2； 五年影响因子：7.9 ）
ISSN： 0960-7412
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Root hairs are crucial in the uptake of essential nutrients and water in plants. This study showed that a zinc finger protein, GIS3 is involved in root hair growth in Arabidopsis. The loss-of-function gis3 and GIS3 RNAi transgenic line exhibited a significant reduction in root hairs compared to the wild type. The application of 1-aminocyclopropane-1-carboxylic acid (ACC), an exogenous ethylene precursor, and 6-benzyl amino purine (BA), a synthetic cytokinin, significantly restored the percentage of hair cells in the epidermis in gis3 and induced GIS3 expression in the wild type. More importantly, molecular and genetic studies revealed that GIS3 acts upstream of ROOT HAIR DEFECTIVE 2 (RHD2) and RHD4 by binding to their promoters. Furthermore, exogenous ACC and BA application significantly induced the expression of RHD2 and RHD4, while root hair phenotype of rhd2-1, rhd4-1, and rhd4-3 was insensitive to ACC and BA treatment. We can therefore conclude that GIS3 modulates root hair development by directly regulating RHD2 and RHD4 expression through ethylene and cytokinin signals in Arabidopsis.
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