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Laccaria bicolor

ABSTRACT: Mycorrhizal fungus (common name: bicolored deceiver) that symbiotically associates with Poplar trees

PROVIDER: PRJNA17357 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR1592495_1.fastq.gz	Fastqsanger.gz
	SRR1592495_2.fastq.gz	Fastqsanger.gz
	SRR1592496_1.fastq.gz	Fastqsanger.gz
	SRR1592496_2.fastq.gz	Fastqsanger.gz

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Ethylene and jasmonic acid act as negative modulators during mutualistic symbiosis between Laccaria bicolor and Populus roots

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Laccaria bicolor gene expression in different tissues and with different host trees

Project description:Laccaria bicolor transcript profiles of different tissues and mycorrhizal root tips from different host trees were analyzed. The array probes were designed from gene models taken from the Joint Genome Institute (JGI, department of energy) Laccaria bicolor genome sequence version 1. One goal was to compare gene expression profiles from ectomycorrhizal root tips with different host plants.

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Expression profiling of in vitro Poplar roots during early interaction with the ectomycorrhizal fungus Laccaria bicolor

Project description:The early phase of the interaction between tree roots and ectomycorrhizal (ECM) fungi, prior to symbiosis establishment, is accompanied by a stimulation of lateral root (LR) development. We set out to identify gene networks that regulate LR development during the early signal exchanges between Populus tremula x Populus alba (hereafter called poplar) and the ECM fungus Laccaria bicolor. A sandwich culture system was developed in order to bring plant and fungus into an indirect contact, which permits signal molecule exchange and LR stimulation (emergence after 4-5 days of contact) but prohibits root colonization. A NimbleGen full genome poplar oligo-array was used to investigate transcript profiles at three days of indirect poplar/L. bicolor contact, referring to the time point of LR initiation in response to the fungus.

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Identification of Populus small RNAs responsive to mutualistic interactions with mycorrhizal fungi, Laccaria bicolor and Rhizophagus irregularis

Project description:Ecto- and endo-mycorrhizal colonization of Populus roots have a positive impact on the overall tree health and growth. A complete molecular understanding of these interactions will have important implications for increasing agricultural or forestry sustainability using plant:microbe-based strategies. These beneficial associations entail extensive morphological changes orchestrated by the genetic reprogramming in both organisms. In this study, we performed a comparative analysis of two Populus species (Populus deltoides and P. trichocarpa) that were colonized by either an arbuscular mycorrhizal fungus (AmF), Rhizophagus irregularis or an ectomycorrhizal fungus (EmF), Laccaria bicolor, to describe the small RNA (sRNA) landscape including small open reading frames (sORFs) and micro RNAs (miRNAs) involved in these mutualistic interactions. We identified differential expression of sRNAs that were, to a large extent, 1) within the genomic regions lacking annotated genes in the Populus genome and 2) distinct for each fungal interaction. These sRNAs may be a source of novel sORFs within a genome, and in this regard, we identified potential sORFs encoded by the sRNAs. We predicted a higher number of differentially-expressed miRNAs in P. trichocarpa (4 times more) than in P. deltoides (conserved and novel). In addition, 44 miRNAs were common in P. trichocarpa between the EmF and AmF treatments, and only 4 miRNAs were common in P. deltoides between the treatments.

2019-04-09 | GSE117158 | GEO

Ethylene and jasmonic acid act as negative modulators during mutualistic symbiosis between Laccaria bicolor and Populus roots

Project description:The Poplar transcriptome was analyzed in mycorrhizal root tips in contact with Laccaria bicolor for 2 weeks. During mycorrhization the roots were treated with either 250M-BM-5m ACC, 10nM JA or 500M-BM-5M SA and compared to untreated mycorrhiza or control roots without contact to L. bicolor. In addition the poplar mutants 35S::PttACO1 and 35S::Atetr1 were used We performed 27 hybridizations (NimbleGen) with samples derived from Populus tremula x Populus alba clone 717-1B4 control roots, untreated mycorrhiza, SA-treated mycorrhiza, ACC-treated mycorrhiza and JA-treated mycorrhiza (3 biological replicates each) as well as Populus tremula x Populus tremuloides T89 control roots, mycorrhiza, 35S::PttACO1 mycorrhiza and 35S::Atetr1-1 mycorrhiza (3 biological replicates). All samples were labeled with Cy3.

2013-12-19 | E-GEOD-53475 | biostudies-arrayexpress

Poplar-Laccaria Mycorrhizal Roots

Project description:This study characterizes the transcriptomic alterations of P. tremula x P. alba at three weeks after inoculation with the ectomycorrhizal fungus Laccaria bicolor. We performed 6 hybridizations (NimbleGen) with samples derived from Populus tremula x P. alba control roots and mycorrhizal root tips. Samples were taken after 3 weeks of interaction (three biological replicates). All samples were labeled with Cy3.

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The transcriptome of poplar roots incubated with MiSSP7, a secreted effector protein of Laccaria bicolor

Project description:To investigate which genes are affected by MiSSP7, a secreted effector protein of Laccaria bicolor, we analyzed the transcriptomes of poplar roots incubated with MiSSP7 protein.

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Poplar-Laccaria: A Timecourse of Mycorrhizal Root Tip Development

Project description:This study characterizes the transcriptomic alterations of P. trichocarpa during interaction with the ectomycorrhizal fungus Laccaria bicolor S238N. Four time-points were analyzed, two weeks, four weeks , six weeks and twelve weeks after inoculation. We performed 32 hybridizations (NimbleGen) with samples derived from Populus trichocarpa control roots and P.trichocarpa mycorrhizal root tips. Samples were taken after 2,4,6 and 12 weeks of interaction (four biological replicates). All samples were labeled with Cy3.

2014-10-09 | E-GEOD-62172 | biostudies-arrayexpress

Comparison of gene expression in roots from Populus trichocarpa and Populus deltoides colonized with Laccaria bicolor

Project description:The majority of trees live in association with symbiotic fungi, which facilitate their access to soil nutrients. The ectomycorrhizal symbiosis represents a complex biological system involving multifaceted interactions between the two partners. The establishment of the symbiosis depends on various conditions (e.g. climate), but also on the genetic traits of the partners. To evaluate the impact of the genetic predisposition on the development and functioning of ectomycorrhizas, we compared the transcriptome of roots from Populus trichocarpa and Populus deltoides colonized with Laccaria bicolor. The Populus whole-genome expression array version 2.0 (S. DiFazio, A. Brunner, P. Dharmawardhana, and K. Munn, unpublished data) manufactured by NimbleGen Systems Limited (Madison, WI) contains in duplicates three independent, non-identical, 60-mer probes per whole gene model plus control probes and labeling controls. Included in the microarray are 65,965 probe sets corresponding to 55,970 gene models predicted on the P.trichocarpa genome sequence version 1.0 and 9,995 aspen cDNA sequences (Populus tremula, Populus tremuloides, and P. tremula x P. tremuloides). NimbleGen whole genome microarray analyses were performed in triplicate as per manufacturer's instructions. We carried out six hybridizations (NimbleGen) with samples derived from Populus trichocarpa and Populus deltoides mycorrhizal root tips. Three samples (biological replicates) originated from Populus trichocarpa (GSM648401, GSM648403, GSM648405) and three biological replicates from Populus deltoides (GSM648408, GSM648411, GSM648414). cDNA was synthesized using CLONTECH Super Smart cDNA Synthesis kit containing an amplification step on the cDNA level. All samples were labeled with Cy3.

2011-01-15 | E-GEOD-26416 | biostudies-arrayexpress

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