The SUR2 gene of Arabidopsis thaliana encodes the cytochrome P450CYP83B1, a modulator of auxin homeostasis

被引：227

作者：

Barlier, I

Kowalczyk, M

Marchant, A

Ljung, K

Bhalerao, R

Bennett, M

Sandberg, G

Bellini, C

机构：

[1] Biol Cellulaire Lab, F-78026 Versailles, France

[2] Swedish Univ Agr Sci, Dept Forest Genet & Plant Physiol, S-90183 Umea, Sweden

[3] Univ Nottingham, Sch Biosci, Nottingham NG7 2RD, England

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2000年 / 97卷 / 26期

关键词：

metabolism;

D O I：

10.1073/pnas.260502697

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：

Genetic screens have been performed to identify mutants with altered auxin homeostasis in Arabidopsis. A tagged allele of the auxin-overproducing mutant sur2 was identified within a transposon mutagenized population. The SUR2 gene was cloned and shown to encode the CYP83B1 protein, which belongs to the targe family of the P450-dependent monooxygenases. SUR2 expression is up-regulated in sur1 mutants and induced by exogenous auxin in the wild type. Analysis of indole3-acetic acid (IAA) synthesis and metabolism in sur2 plants indicates that the mutation causes a conditional increase in the pool size of IAA through up-regulation of IAA synthesis.

引用

页码：14819 / 14824

页数：6

共 32 条

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