4.7 Article

Multiple phytohormones promote root hair elongation by regulating a similar set of genes in the root epidermis in Arabidopsis

期刊

JOURNAL OF EXPERIMENTAL BOTANY
卷 67, 期 22, 页码 6363-6372

出版社

OXFORD UNIV PRESS
DOI: 10.1093/jxb/erw400

关键词

Arabidopsis thaliana; auxin; cytokinin; ethylene; phytohormones; root hair; tip growth

资金

  1. Seven Agricultural Crop Breeding Program [2016YFD0100701]
  2. Major State Basic Research Development Program (973 Program) [2015CB150200]
  3. Zhejiang Provincial Natural Science Foundation of China [LZ15C020001]
  4. National Natural Science Foundation of China [31570183, 31529001, 31370215]
  5. Division Of Integrative Organismal Systems
  6. Direct For Biological Sciences [1444400] Funding Source: National Science Foundation

向作者/读者索取更多资源

Multiple phytohormones, including auxin, ethylene, and cytokinin, play vital roles in regulating cell development in the root epidermis. However, their interactions in specific root hair cell developmental stages are largely unexplored. To bridge this gap, we employed genetic and pharmacological approaches as well as transcriptional analysis in order to dissect their distinct and overlapping roles in root hair initiation and elongation in Arabidopsis thaliana. Our results show that among auxin, ethylene, and cytokinin, only ethylene induces ectopic root hair cells in wild-type plants, implying a special role of ethylene in the hair initiation stage. In the subsequent elongation stage, however, auxin, ethylene, and cytokinin enhance root hair tip growth equally. Our data also suggest that the effect of cytokinin is independent from auxin and ethylene in this process. Exogenous cytokinin restores root hair elongation when the auxin and ethylene signal is defective, whereas auxin and ethylene also sustain elongation in the absence of the cytokinin signal. Notably, transcriptional analyses demonstrated that auxin, ethylene, and cytokinin regulate a similar set of root hair-specific genes. Together these analyses provide important clues regarding the mechanism of hormonal interactions and regulation in the formation of single-cell structures.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据