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ABSTRACT: Bacillus amyloliquefaciens induces resistance in tobacco against powdery mildew

PROVIDER: PRJNA825699 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18729300.fastq.gz	Fastqsanger.gz
	SRR18729300_1.fastq.gz	Fastqsanger.gz
	SRR18729300_2.fastq.gz	Fastqsanger.gz
	SRR18729301_1.fastq.gz	Fastqsanger.gz
	SRR18729301_2.fastq.gz	Fastqsanger.gz

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Indolic metabolites are required for antifungal defense of the Arabidopsis mlo2 mutant

Project description:Arabidopsis thaliana genes MLO2 (Mildew resistance locus-O 2), MLO6 and MLO12 exhibit unequal genetic redundancy with respect to the modulation of defense responses against powdery mildew fungi and the control of developmental phenotypes such as premature leaf decay. We show that early chlorosis and necrosis of rosette leaves in mlo2 mlo6 mlo12 mutants reflects an authentic but untimely leaf senescence program. Comparative transcriptional profiling revealed that transcripts of several genes encoding tryptophan/indole biosynthetic enzymes hyper-accumulate during vegetative development in the mlo2 mlo6 mlo12 mutant. Elevated expression levels of these genes correlate with altered steady-state levels of several indolic metabolites, including the phytoalexin camalexin and indolic glucosinolates, during development in the mlo2 single and the mlo2 mlo6 mlo12 triple mutant. Results of genetic epistasis analysis suggest a decisive role for indolic metabolites in mlo2-conditioned antifungal defense against both biotrophic powdery mildews and a camalexin-sensitive strain of the necrotrophic fungus, Botrytis cinerea. The wound- and pathogen-responsive callose synthase Powdery mildew resistance 4/Glucan-synthase-like 5 (PMR4/GSL5) was found to be responsible for the spontaneous callose deposits in mlo2 mutant plants but dispensable for mlo2-conditioned penetration resistance. Our data strengthen the notion that powdery mildew resistance of mlo2 genotypes is based on the same defense execution machinery as innate antifungal immune responses that restrict invasion of non-adapted fungal pathogens.

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Indolic metabolites are required for antifungal defense of the Arabidopsis mlo2 mutant

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Expression profiles of field-grown wheat expressing the Pm3 allele and null segregants

Project description:It has been demonstrated that wheat overexpressing Pm3b, an allele of the R gene Pm3, has enhanced resistance against powdery mildew under field conditions. A gene expression profile study using GeneChipÂ® Wheat Genome Array was performed to obtain insights into the mode of action of Pm3b and to elucidate the molecular basis of pleiotropic effects observed in three out of four independent transgenic events tested under field conditions. 24 samples were analyzed. Three biological replicates of each sample were included. Two independent transformation events and respective null segregants as control treated with fungicide or artificially inoculated with powdery mildew.

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