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Early transcriptional response to phytopathogen Xanthomonas campestris pv. campestris by susceptible cabbage host

ABSTRACT: Black rot, caused by Xanthomonas campestris pv. campestris (Xcc) is one of the most devastating diseases of cruciferous crops worldwide. The pathogen infects and multiplies in plant vascular tissues and, as the disease progresses, the veins of infected tissues turn black and characteristic V-shaped lesions appear along the margins of leaves.The aim of this work is to identify differentially expressed genes from Brassica oleracea during early infection by Xcc, in an attempt to identify proteins related to resistance. Cabbge seedlings were inoculated with Xanthomonas campestris pv campestris (Xcc) suspension and cabbage gene expression at 6h., 24h. And 48h. After inoculation was assessed with help of Brassica 95k EST microarray chip.

ORGANISM(S): Brassica oleracea var. capitata

SUBMITTER: Dhairyasheel Desai

PROVIDER: E-GEOD-68670 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Early transcriptional response to phytopathogen Xanthomonas campestris pv. campestris by susceptible cabbage host

Project description:Black rot, caused by Xanthomonas campestris pv. campestris (Xcc) is one of the most devastating diseases of cruciferous crops worldwide. The pathogen infects and multiplies in plant vascular tissues and, as the disease progresses, the veins of infected tissues turn black and characteristic V-shaped lesions appear along the margins of leaves.The aim of this work is to identify differentially expressed genes from Brassica oleracea during early infection by Xcc, in an attempt to identify proteins related to resistance.

2015-05-09 | GSE68670 | GEO

A proteomic approach to study Brassica oleracea responses to black rot (Xanthomonas campestris pv. campestris), part 1

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Project description:Brassica nigra plants, a Brassicaceae close to Arabidopsis thaliana, was used for combined stresses experiments. In this study, we performed a whole-genome microarray analysis on five-week-old plants and compared untreated plants and plants treated different single or dual stresses: the larvae Pieris brassicae, egg extract of Pieris brassicae, the bacterial Xanthomonas campestris pv. raphani, the aphid Brevicoryne brassicae or by combined stresses eggs of P. brassicae / P. brassicae, X. campestris / P. brassicae, B. brassicae / P. brassicae.

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Unraveling the metabolic response of Brassica oleracea exposed to Xanthomonas campestris pv. campestris

Project description:BACKGROUND: Brassica crops together with cereals represent the basis of world supplies. Due to their importance, the production losses caused by Xanthomonas campestris pv. campestris (Xcc) infection represent a high economic impact. Understanding molecular and biochemical mechanisms of plants is essential to develop resistant crops with durable protection against diseases. In this regard, metabolomics has emerged as a valuable technology to provide an overview of the biological status of a plant exposed to a disease. This study investigated the dynamic changes in the metabolic profile of Brassica oleracea plants during an Xcc infection from leaves collected at five different days post infection using a mass spectrometry approach. RESULTS: Results showed that Xcc infection causes dynamic changes in the metabolome of B. oleracea. Moreover, induction/repression pattern of the metabolites implicated in the response follows a complex dynamics during infection progression, indicating a complex temporal response. Specific metabolic pathways such as alkaloids, coumarins or sphingolipids are postulated as promising key role candidates in the infection response.CONCLUSION: This work tries to decipher the changes produced on Brassica crops metabolome under Xcc infection and represents a step forward in the understanding of B. oleracea–Xcc interaction.

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Application of Functional Genomics to the Study of Solanacea's Defense Mechanisms against Xanthomonas sp. Pathogenicity

Project description:Xanthomonas campestris pv. campestris (Xcc) is a major bacterial pathogen of cruciferous plants worldwide. The pathogen produces polysaccharides including extracellular cyclic glucan, xanthan, and extracellular enzymes that are key virulence factors. Different Xcc mutants (8397-defective in xanthan and 8523- defective in extracellular glucans) have been obtained and characterized in previously, wich shown to be less infective than the wild type strain when inoculated in N.benthamiana, wich has shown to be an excellent model for the study of Xcc-plant interaction. The objective of this work is evaluate this compounds functions in the plant-pathogen interaction, in particular in the plant transcriptoma modulation to confer susceptibility or resistance to the infection. Plant gene expression profiles would be obtained from independently inoculated leaves of N.benthamiana with the following strains of xanthomonas: Xcc. 8004 (wild type), Xcc. 8397 (xanthan minus), Xcc. 8523 (glucan minus), ant water (control). Leaves discs will be collected at 24 hs post infection and immediately submerged in liquid N2. Total RNA will be extracted with plant RNA specific kits (RNA easy QIAGen), treated with DNase, purified and quantified. Keywords: Reference design

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