MAX4 and RMS1 Are Orthologous Dioxygenase-like Genes That Regulate Shoot Branching in Arabidopsis and Pea

Overview

Journal Genes Dev

Specialty Molecular Biology

Date 2003 Jun 20

PMID 12815068

Citations 216

Authors

Karim Sorefan

Jon Booker

Karine Haurogne

Magali Goussot

Katherine Bainbridge

Eloise Foo

Steven Chatfield

Sally Ward

Christine Beveridge

Catherine Rameau

Ottoline Leyser

Affiliations

Soon will be listed here.

Abstract

Shoot branching is inhibited by auxin transported down the stem from the shoot apex. Auxin does not accumulate in inhibited buds and so must act indirectly. We show that mutations in the MAX4 gene of Arabidopsis result in increased and auxin-resistant bud growth. Increased branching in max4 shoots is restored to wild type by grafting to wild-type rootstocks, suggesting that MAX4 is required to produce a mobile branch-inhibiting signal, acting downstream of auxin. A similar role has been proposed for the pea gene, RMS1. Accordingly, MAX4 and RMS1 were found to encode orthologous, auxin-inducible members of the polyene dioxygenase family.

Citing Articles

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