Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1051329 | ENA |
REPOSITORIES: ENA
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Project description:Ectomycorrhizal fungi are dependent on host trees for carbon supply. In return ectomycorrhizal fungi supply trees with water and nutrients. It is known that when ectomycorrhizal fungi have exploited a nutrient rich patch in soil, the carbon allocation to mycelia in that patch is reduced, with the consequence of mycelia dying, but less is known of the dynamics of this senescence. We cultivated the ectomycorrhizal fungus Paxillus involutus in an axenic system. We collected growth and transcriptome data at different stages of carbon starvation during fungal growth. Carbon starvation induced a decrease in fungal biomass, which coincided with the release of NH4+ and the expression of genes connected with autophagy as well as protease and chitinase activity. Monoaromatic compounds, chitin and protease activity was detected in the liquid growth media during carbon starvation. The exudation of NH4+ and increase of monoaromatic compound during C starvation suggests senescence and autolysis of P. involutus. Together with the upregulation of genes involved in autophagy, chitinase and endopeptidase activity this points towards a controlled senescence including recycling of compounds originating from the fungi. Reduced C allocation to ectomycorrhizal mycelia in recently depleted nutrient patches in forest soils must be of ubiquitous nature. Understanding the mechanisms during exploitation of nutrients by ectomycorrhizal fungi is of great importance for understanding carbon and nutrient dynamics in forest soils. This is to our knowledge the first study describing the carbon starvation response in an ectomycorrhizal fungus.
2014-04-01 | GSE54940 | GEO
Project description:Ectomycorrhizal fungi are dependent on host trees for carbon supply. In return ectomycorrhizal fungi supply trees with water and nutrients. It is known that when ectomycorrhizal fungi have exploited a nutrient rich patch in soil, the carbon allocation to mycelia in that patch is reduced, with the consequence of mycelia dying, but less is known of the dynamics of this senescence. We cultivated the ectomycorrhizal fungus Paxillus involutus in an axenic system. We collected growth and transcriptome data at different stages of carbon starvation during fungal growth. Carbon starvation induced a decrease in fungal biomass, which coincided with the release of NH4+ and the expression of genes connected with autophagy as well as protease and chitinase activity. Monoaromatic compounds, chitin and protease activity was detected in the liquid growth media during carbon starvation. The exudation of NH4+ and increase of monoaromatic compound during C starvation suggests senescence and autolysis of P. involutus. Together with the upregulation of genes involved in autophagy, chitinase and endopeptidase activity this points towards a controlled senescence including recycling of compounds originating from the fungi. Reduced C allocation to ectomycorrhizal mycelia in recently depleted nutrient patches in forest soils must be of ubiquitous nature. Understanding the mechanisms during exploitation of nutrients by ectomycorrhizal fungi is of great importance for understanding carbon and nutrient dynamics in forest soils. This is to our knowledge the first study describing the carbon starvation response in an ectomycorrhizal fungus. A one-chip study (data from 12 subarrays collected from a 12-plex Nimblegen microarray (ID 527890) using total RNA recovered from three separate glass-bead cultures of Paxillus involutus (ATCC200175) grown on Minimum Melin Norkrans medium (MMN) amended with ammonium (C/N ratio 3) and harvested at different times of carbon starvation.)
2014-04-01 | E-GEOD-54940 | biostudies-arrayexpress
Project description:The aim of this analysis was to better understand the complex symbiotic stage of Tuber melanosporum by combining the use of laser capture microdissection and microarray gene expression analysis. We isolated the fungal/soil (i.e. the mantle) and the fungal/plant (i.e. the Hartig net) interfaces from transverse sections of T. melanosporum/Corylus avellana ectomycorrhizas and identified the transcriptional landscape associated with each compartment. We compared these data to the transcriptome of ectomycorrhizal root tips, free-living mycelium and fruiting bodies of Tuber melanosporum (Series GSE17529).
2013-03-01 | GSE36870 | GEO
Project description:The aim of this analysis was to better understand the complex symbiotic stage of Tuber melanosporum by combining the use of laser capture microdissection and microarray gene expression analysis. We isolated the fungal/soil (i.e. the mantle) and the fungal/plant (i.e. the Hartig net) interfaces from transverse sections of T. melanosporum/Corylus avellana ectomycorrhizas and identified the transcriptional landscape associated with each compartment. We compared these data to the transcriptome of ectomycorrhizal root tips, free-living mycelium and fruiting bodies of Tuber melanosporum (Series GSE17529). The T. melanosporum custom-exon expression array (4 x 72K) manufactured by Roche NimbleGen Systems Limited (Madison, WI) contained five independent, nonidentical, 60-mer probes per gene model coding sequence. Included in the oligoarray were 12,232 annotated gene models, 3,913 random 60-mer control probes and labelling controls. Sequences used for the oligonucleotide design were from an early draft of the gene catalog containing several TE families. For 1,876 gene models, technical duplicates were included on the array. We performed 6 hybridizations (NimbleGen) with samples derived from microdissected mantles (3 biological replicates) and Hartig nets ((3 biological replicates each) from T. melanosporum/Corylus avellana ectomycorrhizal root tips . All samples were labeled with Cy3.
2013-03-01 | E-GEOD-36870 | biostudies-arrayexpress
Project description:Illumina HiSeq technology was used to generate mRNA profiles from Hebeloma cylindrosporum ectomycorrhizal root tips compared to free-living mycelium . Ectomycorrhizal root tips were harvested after 6 months and used for RNA extraction. Reads of 100 bp were generated and aligned to Hebeloma cylindrosporum transcripts (http://genome.jgi-psf.org/Hebcy2) using CLC Genomics Workbench 6. mRNA profiles from Hebeloma cylindrosporum ectomycorrhizal root tips and free-living mycelium were generated by Illumina HiSeq2000 sequencing (100bp). Ttwo biological replicates were sequenced for mycorrhizal and mycelium samples.
2015-07-01 | E-GEOD-66156 | biostudies-arrayexpress
Project description:Illumina HiSeq technology was used to generate mRNA profiles from Amanita muscaria ectomycorrhizal root tips compared to free-living mycelium . Ectomycorrhizal root tips and control mycelium were harvested after 6 weeks and used for RNA extraction. Reads of 150 bp were generated and aligned to Amanita muscaria transcripts (http://genome.jgi-psf.org/Amamu1) using CLC Genomics Workbench 7. mRNA profiles from Amanita muscaria ectomycorrhizal root tips and free-living mycelium were generated by Illumina HiSeq2000 sequencing (150bp). Two biological replicates were sequenced for mycorrhizal and mycelium samples.
2015-02-06 | E-GEOD-63867 | biostudies-arrayexpress
Project description:Illumina HiSeq technology was used to generate mRNA profiles from Hebeloma cylindrosporum ectomycorrhizal root tips compared to free-living mycelium . Ectomycorrhizal root tips and control mycelium were harvested after 3 weeks and used for RNA extraction. Reads of 150 bp were generated and aligned to Hebeloma cylindrosporum transcripts (http://genome.jgi-psf.org/Hebcy2) using CLC Genomics Workbench 7. mRNA profiles from Hebeloma cylindrosporum ectomycorrhizal root tips and free-living mycelium were generated by Illumina HiSeq2000 sequencing (150bp). Three biological replicates were sequenced for mycorrhizal and mycelium samples.
2015-02-06 | E-GEOD-63868 | biostudies-arrayexpress