Competitive canalization of PIN-dependent auxin flow from axillary buds controls pea bud outgrowth

被引：160

作者：

Balla, Jozef ^{[1
]}

Kalousek, Petr ^{[1
]}

Reinoehl, Vilem ^{[1
]}

Friml, Jiri ^{[2
,3
,4
]}

Prochazka, Stanislav ^{[1
]}

机构：

[1] Mendel Univ Brno, Dept Plant Biol, Brno 61300, Czech Republic

[2] Univ Ghent VIB, Dept Plant Syst Biol, B-9052 Ghent, Belgium

[3] Univ Ghent, Dept Plant Biotechnol & Genet, B-9052 Ghent, Belgium

[4] Masaryk Univ, Dept Funct Genom & Prote, Inst Expt Biol, Fac Sci, Brno 62500, Czech Republic

来源：

PLANT JOURNAL | 2011年 / 65卷 / 04期

关键词：

apical dominance; auxin transport; bud outgrowth; canalization; pea; PIN1; immunolocalization; PISUM-SATIVUM-L; APICAL DOMINANCE; GROWTH SUBSTANCE; GENE-EXPRESSION; TRANSPORT; INHIBITION; DECAPITATION; RELEASE; PLANTS; ACID;

D O I：

10.1111/j.1365-313X.2010.04443.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

P>Shoot branching is one of the major determinants of plant architecture. Polar auxin transport in stems is necessary for the control of bud outgrowth by a dominant apex. Here, we show that following decapitation in pea (Pisum sativum L.), the axillary buds establish directional auxin export by subcellular polarization of PIN auxin transporters. Apical auxin application on the decapitated stem prevents this PIN polarization and canalization of laterally applied auxin. These results support a model in which the apical and lateral auxin sources compete for primary channels of auxin transport in the stem to control the outgrowth of axillary buds.

引用

页码：571 / 577

页数：7

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