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Induction of a Salicylic Acid Glucosyltransferase, AtSGT1, Is an Early Disease Response in Arabidopsis thaliana  

Song, Jong Tae (School of Applied Biosciences, Kyungpook National University)
Publication Information
Molecules and Cells / v.22, no.2, 2006 , pp. 233-238 More about this Journal
Abstract
Endogenous salicylic acid (SA) and its predominant conjugates, SA 2-O-${\beta}$-D-glucoside (SAG) and the glucose ester of SA (SGE), increase dramatically during plant defense responses. Here I report the isolation and characterization of an Arabidopsis thaliana UDP-glucose:SA glucosyltransferase1 (AtSGT1) gene using a tobacco SGT gene previously reported, whose product catalyzes the formation of both SAG and SGE. The recombinant AtSGT1 protein had significant activities with SA and benzoic acid, and synthesized SAG and SGE. Northern blot analysis showed that AtSGT1 was rapidly induced both by exogenous SA and infection with the bacterial pathogen Pseudomonas syringae, indicating that pathogen-inducible AtSGT1 expression is an early disease response and may be involved in the accumulation of glucosyl SA during pathogenesis.
Keywords
Glucose Ester of SA; SA Glucosyltransferase; Salicylic Acid; SA 2-O-${\beta}$-D-Glucoside;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 17  (Related Records In Web of Science)
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