The receptor-like kinases BAM1 and BAM2 are required for root xylem patterning

被引：35

作者：

Fan, Pengfei ^{[1
,2
]}

Aguilar, Emmanuel ^{[1
,3
]}

Bradai, Mariem ^{[1
]}

Xue, Hao ^{[1
,2
]}

Wang, Hua ^{[4
]}

Rosas-Diaz, Tabata ^{[1
]}

Tang, Weihua ^{[4
]}

Wolf, Sebastian ^{[5
]}

Zhang, Heng ^{[1
]}

Xu, Lin ^{[4
]}

Lozano-Duran, Rosa ^{[1
,6
]}

机构：

[1] Chinese Acad Sci, Shanghai Ctr Plant Stress Biol, CAS Ctr Excellence Mol Plant Sci, Shanghai 201602, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Univ Malaga, Fac Ciencias, Inst Hortofruticultura Subtrop & Mediterranea La, Area Genet, E-29071 Malaga, Spain

[4] Chinese Acad Sci, CAS Ctr Excellence Mol Plant Sci, Shanghai Inst Plant Physiol & Ecol, Natl Lab Plant Mol Genet, Shanghai 200032, Peoples R China

[5] Heidelberg Univ, Ctr Organismal Studies, Dept Plant Dev Biol, D-69120 Heidelberg, Germany

[6] Eberhard Karls Univ Tubingen, Ctr Plant Mol Biol, Dept Plant Biochem, D-72076 Tubingen, Germany

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2021年 / 118卷 / 12期

基金：

中国国家自然科学基金; 欧盟地平线“2020”;

关键词：

receptor-like kinase; BAM1/2; xylem patterning; C4; miRNA;

D O I：

10.1073/pnas.2022547118

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Xylem patterning in the root is established through the creation of opposing gradients of miRNAs and their targets, transcripts of the HD-ZIP III family of transcriptions factors, enabled by the cell-to-cell spread of the former. The miRNAs regulating xylem patterning, miR165/6, move through plasmodesmata, but how their trafficking is regulated remains elusive. Here, we describe that simultaneous mutation of the plasma membrane- and plasmodesmata-localized receptor-like kinases (RLKs) BARELY ANY MERISTEM (BAM) 1 and 2 or expression of the geminivirus-encoded BAM1/2-interactor C4 results in higher accumulation and broader distribution of the HD-ZIP III transcripts despite normal total accumulation of miR165/6, and ultimately causes defects in xylem patterning, which depend on the function of the aforementioned miRNA targets. Taken together, our results showthat BAM1 and BAM2 are redundantly required for proper xylem patterning in the Arabidopsis root, by ensuring the proper distribution and accumulation of miR165/6-targeted transcripts.

引用

页数：6

共 30 条

[1] Cell signalling by microRNA165/6 directs gene dose-dependent root cell fate [J].