Brassinosteroid signaling and auxin transport are required to establish the periodic pattern of Arabidopsis shoot vascular bundles

被引：146

作者：

Ibanes, Marta ^{[2
]}

Fabregas, Norma ^{[1
]}

Chory, Joanne ^{[3
,4
]}

Cano-Delgado, Ana I. ^{[1
]}

机构：

[1] UAB, IRTA, CSIC, Ctr Res Agr Genom,Mol Genet Dept, Barcelona 08034, Spain

[2] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

[3] Salk Inst Biol Studies, Howard Hughes Med Inst, La Jolla, CA 92037 USA

[4] Salk Inst Biol Studies, Plant Biol Lab, La Jolla, CA 92037 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2009年 / 106卷 / 32期

基金：

美国国家科学基金会;

关键词：

mathematical model; pattern formation; plant hormones; procambium; RECEPTOR KINASE; DIFFERENTIATION; BIOSYNTHESIS; PHYLLOTAXIS; GROWTH; MORPHOGENESIS; EXPRESSION; TISSUE; INTEGRATION; ELONGATION;

D O I：

10.1073/pnas.0906416106

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：

The plant vascular system provides transport and support capabilities that are essential for plant growth and development, yet the mechanisms directing the arrangement of vascular bundles within the shoot inflorescence stem remain unknown. We used computational and experimental biology to evaluate the role of auxin and brassinosteroid hormones in vascular patterning in Arabidopsis. We show that periodic auxin maxima controlled by polar transport and not overall auxin levels underlie vascular bundle spacing, whereas brassinosteroids modulate bundle number by promoting early procambial divisions. Overall, this study demonstrates that auxin polar transport coupled to brassinosteroid signaling is required to determine the radial pattern of vascular bundles in shoots.

引用

页码：13630 / 13635

页数：6