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- W2169778545 endingPage "269" @default.
- W2169778545 startingPage "257" @default.
- W2169778545 abstract "Specific plant signal molecules are known to induce syringomycin production and expression of syrB1, a syringomycin synthetase gene, in Pseudomonas syringae pv. syringae. This report demonstrates that syringopeptin production likewise is activated by plant signal molecules and that the GacS, SalA, and SyrF regulatory pathway mediates transmission of plant signal molecules to the syr-syp biosynthesis apparatus. Syringopeptin production by BR132 was increased two-fold by addition of arbutin (100 microM) and D-fructose (0.1%) to syringomycin minimal medium (SRM). Among 10 plant phenolic compounds tested, only the phenolic glucosides arbutin, salicin, and phenyl-beta-D-glucopyranoside induced substantially the beta-glucuronidase (GUS) activity of a sypA::uidA reporter from 242 U per 10(8) CFU without plant signal molecules up to 419 U per 10(8) CFU with plant signal molecules. Syringopeptin production was found to be controlled by the SalA/SyrF regulon because no toxin was detected from cultures of B301DSL7 (i.e., salA mutant) and B301DSL1 (i.e., syrF mutant), and the expression of sypA::uidA was decreased approximately 99 and 94% in salA (B301DSL30) and syrF (B301DNW31) mutant backgrounds, respectively. Subgenomic analysis of transcriptional expression with a 70-mer oligonucleotide microarray demonstrated that the syr-syp genes are induced 2.5- to 10.5-fold by addition of arbutin and D-fructose to SRM. This study establishes that plant signal molecules are transmitted through the GacS, SalA/SyrF pathway to activate the coordinated transcriptional expression of the syr-syp genes." @default.
- W2169778545 created "2016-06-24" @default.
- W2169778545 creator A5018224664 @default.
- W2169778545 creator A5030020710 @default.
- W2169778545 creator A5067086355 @default.
- W2169778545 creator A5070818899 @default.
- W2169778545 creator A5082780859 @default.
- W2169778545 date "2006-03-01" @default.
- W2169778545 modified "2023-09-27" @default.
- W2169778545 title "The Expression of Genes Encoding Lipodepsipeptide Phytotoxins by<i>Pseudomonas syringae</i>pv.<i>syringae</i>Is Coordinated in Response to Plant Signal Molecules" @default.
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