Auxin gradient is crucial for the maintenance of root distal stem cell identity in Arabidopsis.
The plant hormone auxin plays a critical role in the maintenance of root stem cell niches in Arabidopsis. We have recently reported that WUSCHEL-RELATED HOMEOBOX 5 (WOX5) transcription factor modulates free auxin production in the quiescent center (QC) of the root and its expression is inhibited in a feedback-dependent manner by canonical auxin signaling that involves indole-3-acetic acid 17 (IAA17) auxin response repressor. WOX5-IAA17 feedback circuit assures the maintenance of auxin response maximum in the root tip and thereby contributes to the maintenance of distal stem cell (DSC) populations. Here, we provide evidence to show that an optimal auxin maximum in QC guided auxin signaling gradient in root tips is crucial for maintaining root DSC identity.
The Key Laboratory of Plant Cell Engineering and Germplasm Innovation; Ministry of Education; School of Life Sciences; Shandong University; Jinan, PR China.
Huiyu
H
Tian
The Key Laboratory of Plant Cell Engineering and Germplasm Innovation; Ministry of Education; School of Life Sciences; Shandong University; Jinan, PR China.
Tiantian
T
Niu
The Key Laboratory of Plant Cell Engineering and Germplasm Innovation; Ministry of Education; School of Life Sciences; Shandong University; Jinan, PR China.
Qianqian
Q
Yu
The Key Laboratory of Plant Cell Engineering and Germplasm Innovation; Ministry of Education; School of Life Sciences; Shandong University; Jinan, PR China.
Taiyong
T
Quan
The Key Laboratory of Plant Cell Engineering and Germplasm Innovation; Ministry of Education; School of Life Sciences; Shandong University; Jinan, PR China.
Zhaojun
Z
Ding
D017360:Arabidopsis / Q000166:cytology* / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000378:metabolism; D002454:Cell Differentiation; D017930:Genes, Reporter; D049452:Green Fluorescent Proteins / Q000378:metabolism; D018398:Homeodomain Proteins / Q000378:metabolism; D007210:Indoleacetic Acids / Q000378:metabolism*; D018519:Meristem / Q000166:cytology / Q000378:metabolism; D018517:Plant Roots / Q000166:cytology* / Q000378:metabolism; D015398:Signal Transduction; D013234:Stem Cells / Q000166:cytology* / Q000378:metabolism
D029681:Arabidopsis Proteins; D018398:Homeodomain Proteins; D007210:Indoleacetic Acids; C116421:WUSCHEL protein, Arabidopsis; D049452:Green Fluorescent Proteins