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- W2079135907 abstract "In Triticum aestivum L. (wheat), the root-colonizing bacterium Pseudomonas fluorescens strain Q8r1-96 produces the antifungal metabolite 2,4-diacetylphloroglucinol (DAPG), suppresses damage caused by soilborne root pathogens, and modulates multiple stress or defense pathways in wheat roots. To test the hypothesis that DAPG is an inducer of root defense responses, we compared the impact of wild type and a DAPG null mutant on the abundance of fifteen wheat root defense gene homologues in two wheat cultivars, Buchanan and Tara, using real-time PCR. We also sought to determine whether the type III secretion system (T3SS) of Q8r1-96 is important for root defense gene induction by using a T3SS deletion mutant of Q8r1-96. Transcripts encoding dihydroxyacetone reductase, monodehydroascorbate reductase, a hypersensitive response-induced protein, pathogenesis-related protein10a (PR-10a) and two glutathione-S-transferases were induced in a strain–dependent manner relative to no-bacterium controls within the 24-h interval of the study. Our findings indicated that neither DAPG nor the T3SS were key single factors in the expression of all the root defense homologues. However, gene expression was induced to a greater degree in cv. Buchanan compared to cv. Tara. Clusters of co-induced transcripts also differed with the host cultivar-bacterial strain combination. Cultivar dependence of molecular root defense responses to biocontrol P. fluorescens has implications for the utility of biocontrol pseudomonads in greenhouse and field crop production systems." @default.
- W2079135907 created "2016-06-24" @default.
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- W2079135907 date "2012-02-01" @default.
- W2079135907 modified "2023-09-26" @default.
- W2079135907 title "Cultivar-dependent transcript accumulation in wheat roots colonized by Pseudomonas fluorescens Q8r1-96 wild type and mutant strains" @default.
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- W2079135907 doi "https://doi.org/10.1016/j.biocontrol.2011.11.002" @default.
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