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Root associated fungus metagenome

ABSTRACT: Propagule-Type Specificity in Arbuscular Mycorrhizal Fungal Communities During Early Growth of Allium tuberosum

PROVIDER: PRJDB20733 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR680777_1.fastq.gz	Fastqsanger.gz
	DRR680777_2.fastq.gz	Fastqsanger.gz
	DRR680778_1.fastq.gz	Fastqsanger.gz
	DRR680778_2.fastq.gz	Fastqsanger.gz
	DRR680779_1.fastq.gz	Fastqsanger.gz

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Gene expression during early stages of arbuscular mycorrhizal root formation in Medicago truncatula.

2012-03-28 | GSE34617 | GEO

Gene expression during early stages of arbuscular mycorrhizal root formation in Medicago truncatula.

Project description:Arbuscular mycorrhiza (AM) interactions between plants and Glomeromycota fungi primarily support phosphate aquisition of most terrestrial plant species. To unravel gene expression during early stages of Medicago truncatula root colonization by AM fungi, we used genome-wide transcriptome profiling based on mycorrhizal root fragments enriched for early fungal infection stages. We used Medicago GeneChips to detail the global programme of gene expression in response to early stages of colonization by arbuscular mycorrhizal fungi and identified genes differentially expressed during these early stages. Medicago truncatula GFP-HDEL hairy roots (genotypes A17 and DMI3) were grown in vertically-oriented petri dishes, incubated at 26M-BM-0C and inoculated with 8 Gigaspora margarita spores, which were positioned between the lateral roots. G.margarita spores germinated in 2 to 4 days. Hyphopodia were observed after 5-6 days. Root fragments which reacted to the fungal contact were collected and frozen. Non-inoculated control root fragments were harvested at a comparable age.

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Project description:Arbuscular mycorrhizal fungi arguably form the most successful and wide-spread endosymbiosis with plants. In general terms there is very little host-specificity in this interaction, indicating an extremely broad compatibility. However, host preferences as well as varying symbiotic efficiencies have been observed, the molecular basis of which is still largely unknown. Secreted proteins (SPs) may act as fungal effectors to control symbiotic efficiency in a host-dependent manner. Therefore, we studied whether AM fungi adjust their secretome in a host- and stage-dependent manner to contribute to their extremely wide host-range. We investigated the expression of SP encoding genes of R. irregularis DAOM197198 in three evolutionary distantly related plant species, Medicago truncatula (Medicago), Nicotiana benthamiana (Nicotiana) and Allium schoenoprasum (Chives). In addition we used laser microdissection in combination with RNAseq to study SP expression at different stages of the symbiotic interaction in Medicago. Our data indicate that the vast majority of 288 expressed SPs show equal expression levels in the interaction with all three host plants. In addition, a subset (~15%) of the SPs show significant differential expression depending on the host plant and/or environmental condition. This host-dependent expression appears to be controlled locally in the hyphal network in response to host metabolic cues. Overall, this study offers a comprehensive analysis of the R. irregularis secretome, which now offers a solid basis to direct functional studies on the role of fungal SPs in AM symbiosis.

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root associated fungus metagenome

Project description:Arbuscular mycorrhizal fungal communities in the roots of understory photosynthetic herbaceous plants

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Project description:Most vascular flowering plants have the ability to form mutualistic associations with soil fungi from the Glomeromycota. The resulting symbiosis is called an arbuscular mycorrhiza and they are widespread in terrestrial ecosystems throughout the world. Significant alteration occurs at physiological and molecular levels in both symbionts. To gain a better understanding of the AM symbiosis, we use a 16000 feature oligonucleotide based array to examine gene expression in an arbuscular mycorrhizal symbioses, M. truncatula/Gigaspora gigantea. Keywords: Medicago truncatula, Mycorrhizal, Gigaspora gigantea, microarray profiling

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Gene expression data from Mt/Gi vs Mt root tissues

Project description:Most vascular flowering plants have the ability to form mutualistic associations with soil fungi from the Glomeromycota. The resulting symbiosis is called an arbuscular mycorrhiza and they are widespread in terrestrial ecosystems throughout the world. Significant alteration occurs at physiological and molecular levels in both symbionts. To gain a better understanding of the AM symbiosis, we use a 16000 feature oligonucleotide based array to examine gene expression in an arbuscular mycorrhizal symbioses, M. truncatula/G. intraradices. Keywords: Medicago truncatula, Mycorrhizal, Glomus intraradices, microarray profiling

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From root to fruit: RNA-Seq analysis reveals that arbuscular mycorrhizal symbiosis may affect the tomato fruit metabolism

Project description:The crop species Solanum lycopersicum establishes a beneficial root- symbiosis with the widespread group of arbuscular mycorrhizal (AM) fungi. The mycorrhiza establishment leads to a modulation of the plant gene expression which is not restricted to the root compartment but spreads at the organism-wide level. To understand the systemic effect of the fungal presence on the tomato fruit, we performed global transcriptome profiling through RNA-Seq analysis on Moneymaker tomato fruits sampled at the turning ripening stage. Gene expression data were obtained from fruits sampled at 55 days after flowering. Fruits were collected from Funneliformis mosseae colonized plants and from control plants which were fertilized in order to avoid responses related to nutrient deficiency.

2014-04-04 | E-MTAB-2276 | biostudies-arrayexpress

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