Characterization of the Arabidopsis Lysine-rich Arabinogalactan-protein AtAGP17 Mutant (rat1) That Results in a Decreased Efficiency of Agrobacterium Transformation

Overview

Journal Plant Physiol

Specialty Physiology

Date 2004 Aug 3

PMID 15286287

Citations 66

Authors

Yolanda Maria Gaspar

Jaesung Nam

Carolyn Jane Schultz

Lan-Ying Lee

Paul R Gilson

Stanton B Gelvin

Antony Bacic

Affiliations

Soon will be listed here.

Abstract

Arabinogalactan-proteins (AGPs) are a family of complex proteoglycans widely distributed in plants. The Arabidopsis rat1 mutant, previously characterized as resistant to Agrobacterium tumefaciens root transformation, is due to a mutation in the gene for the Lys-rich AGP, AtAGP17. We show that the phenotype of rat1 correlates with down-regulation of AGP17 in the root as a result of a T-DNA insertion into the promoter of AGP17. Complementation of rat1 plants by a floral dip method with either the wild-type AGP17 gene or cDNA can restore the plant to a wild-type phenotype in several independent transformants. Based on changes in PR1 gene expression and a decrease in free salicylic acid levels upon Agrobacterium infection, we suggest mechanisms by which AGP17 allows Agrobacterium rapidly to reduce the systemic acquired resistance response during the infection process.

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