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The transcriptome of the arbuscular mycorrhizal fungus Glomus intraradices

ABSTRACT: The transcriptome of the arbuscular mycorrhizal fungus Glomus intraradices

PROVIDER: PRJNA140979 | ENA |

REPOSITORIES: ENA

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Gene expression data from arbuscular mycorrhizal and phosphate-treated Medicago truncatula roots.

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Project description:Casuarina glauca belongs to a family of angiosperms called actinorhizal plants because they can develop nitrogen-fixing nodules in association with the soil bacteria Frankia. They can also develop arbuscular mycorrhizae (AM) while associated with Glomeromycota fungi. The aim of this transcriptomic study was to get a global view of the plant symbiotic genetic program in AM and to identify new key plant genes involved in endosymbioses. C. glauca plants were grown in hydroponics then transferred to pots with or without spores of Glomus intraradices and watered with low phosphate solution to enhance mycorrhization. For this study we considered two stages: - a stage where plants were inoculated with G. intraradices, roots were harvested 8 weeks after inoculation with the G. intraradices. AM structures were present. - a stage where plants were not inoculated, roots were harvested at the same time as the inoculated roots , this is our control condition. AM structures were absent. Three biological replicates were used for each condition. Microarrays were designed by Imaxio (Clermont Ferrand, France ; http://www.imaxio.com/index.php) which has been accredited by Agilent Technologies (Palo Alto, CA, USA; http://www.home.agilent.com/agilent/home.jspx) as a certified service provider for microarray technologies. Based on 14327 annotated unigenes for C. glauca, 60mers probes were designed using eArray software (1 probe per unigene) and custom 8 x 15K Oligo Microarrays were manufactured by Agilent.

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The transcriptome of the arbuscular mycorrhizal fungus Glomus intraradices

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affy_med_2011_09-Analysis of Medicago truncatula root transcriptome in response to mycorrhization by Glomus intraradices under phosphate and nitrogen limitation

Project description:affy_med_2011_09: In natural ecosystems most vascular plants develop symbiosis with arbuscular mycorrhizal (AM) fungi which help them acquire nutrients such as phosphorus (P) and nitrogen (N). P has long been known to control AM symbiosis which takes place only when P is limiting. For N, however, its role in controlling mycorrhization is less clear. We have chosen the model plant Medicago truncatula to analyze the impact of P limitation and both P and N limitation on Medicago root transcriptome in response to the AM fungus Rhizophagus irregularis (formerly Glomus intraradices (BEG141)). These analyses may help us uncover signaling events involved in the interaction between these symbionts as well as genes encoding transporters potentially important for nutrient exchanges in these conditions. --We will compare the root transcriptome of Medicago truncatula plants inoculated with Rhizophagus irregularis to that of non-inoculated plants grown under P limitation (or both P and N limitation) after 4 weeks of culture

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