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Unknown,Transcriptomics,Genomics,Proteomics

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Transcriptional analysis of oxidative-stressed bean nodules elicited by Rhizobium etli expressing an heterologous globin (VHb)

ABSTRACT: A wide range of environmental stresses lead to an elevated production of reactive oxygen species (ROS) in plant cells thus resulting in oxidative stress. The biological nitrogen fixation in the legume - Rhizobium symbiosis is at high risk of damage from oxidative stress. Common bean (Phaseolus vulgaris) active nodules exposed to the herbicide Paraquat (1,1 '-Dimethyl-4, 4'-bipyridinium dichloride hydrate) that generates ROS accumulation, showed a reduced nitrogenase activity and ureide content. We analyzed the global gene response of stressed nodules using the Bean CombiMatrix Custom Array 90K, that includes probes from some 30,000 expressed sequence tags (EST). The experimental design, based on circular hybridizations, included four conditions as, with two independent biological replicates and three technical replicates for each conditions. A total of 2418 differentially expressed genes (DEG) were identified among the different combinations. Our results showed good correspondence among both the GO term and the MapMan enrichment analyses highlighting DEG from PQ-treated nodules assigned to the functional super-categories: trans-membrane transport, hormone signal transduction, stress response, and regulation. In this work we analyzed the effect of VHb-expressing R. etli CE3 in the symbiosis of common bean plants under oxidative stress experimentally generated by the addition of PQ for 48 hours. We analyzed the transcript profile, via microarray hybridization, using the Bean CombiMatrix Custom Array 90K, that includes probes from some 30,000 expressed sequence tags (EST).

ORGANISM(S): Phaseolus vulgaris

SUBMITTER: Mario RamÃrez

PROVIDER: E-GEOD-83324 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Transcript Profiling of the Common Bean - Rhizobium Symbiosis under Oxidative Stress

Project description:A wide range of environmental stresses lead to an elevated production of reactive oxygen species (ROS) in plant cells thus resulting in oxidative stress. The biological nitrogen fixation in the legume - Rhizobium symbiosis is at high risk of damage from oxidative stress. Common bean (Phaseolus vulgaris) active nodules exposed to the herbicide Paraquat (1,1 '-Dimethyl-4, 4'-bipyridinium dichloride hydrate) that generates ROS accumulation, showed a reduced nitrogenase activity and ureide content. We analyzed the global gene response of stressed nodules using the Bean CombiMatrix Custom Array 90K, that includes probes from some 30,000 expressed sequence tags (EST). A total of 4,280 ESTs were differentially expressed in oxidative stressed bean nodules; of these 2,218 were repressed. These genes were grouped in 44 different biological processes as defined by Gene Onthology. Analysis with the PathExpress bioinformatic tool, adapted for bean, identified five significantly repressed metabolic path This work presents the transcriptional profile of bean nodules, induced by strain Rhizobium tropici CIAT 899, under oxidative stress, generated experimentally by adding the herbicide Paraquat (1,1 '-Dimethyl-4, 4'-bipyridinium dichloride hydrate) for 48 hours. We analyzed the transcript profile, via microarray hybridization, using the Bean CombiMatrix Custom Array 90K, that includes probes from some 30,000 expressed sequence tags (EST). A total of 4,280 ESTs were differentially expressed in oxidative stressed bean nodules; of these 2,218 were repressed.

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Generation of a transcriptome catalog for global analysis of gene expression in Ampelomyces quisqualis during mycoparasitization

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2011-11-23 | E-GEOD-33894 | biostudies-arrayexpress

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2013-12-19 | E-GEOD-48058 | biostudies-arrayexpress

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