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

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

PROVIDER: PRJNA481323 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7525690.fastq.gz	Fastqsanger.gz
	SRR7525700.fastq.gz	Fastqsanger.gz
	SRR7525691.fastq.gz	Fastqsanger.gz
	SRR7525701.fastq.gz	Fastqsanger.gz
	SRR7525692.fastq.gz	Fastqsanger.gz

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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.

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Project description:Arbuscular mycorrhizal symbiosis is a predominant relationship between plant and arbuscular mycorrhizal fungi. To idendify arbuscular mycorrhiza responsive miRNAs, small RNA libraries were constructed in tomato roots colonized with Rhizophagus irregularis and without Rhizophagus irregularis. We identify miRNAs in tomato roots and provide a new profile of tomato miRNAs. And we found that some miRNAs were responsive to arbuscular mycorrhiza by comparing miRNAs in treatment with that in control. Examination of arbuscular mycorrhiza responsive miRNAs in tomato through high-throughput small RNA sequencing of roots with Rhizophagus irregularis and that without Rhizophagus irregularis

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Small RNA sequencing in tomato roots with and without Rhizophagus irregularis

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responses of maize to the arbuscular fungus rhizophagus irregularis mitigate n deficiency stress-Physiological and molecular responses of maize to the arbuscular mycorrhizla fungus 5AMF) Rhizophagus irregularis mitigate nitrogen deficiency stress.

Project description:ngs2021_19_rhizophagus-responses of maize to the arbuscular fungus rhizophagus irregularis mitigate n deficiency stress-What is the impact of Rhizophagus irregularis on maize transcriptome under different N nutrition conditions, what is the impact of N on R. irregularis transcriptome in maize roots.-After 4 days of germination, maize seeds were sown in pots filled with sterile mix 1:1 clay beads:unfertilized peat. Inoculation performed in 3 times with Rhizohphagus irregularis spores purchased at Agronutrition. First inoculation perfomed with 500 spores/plant at sowing. Two other incoulations performed the following week and 2 weeks later with 100 spore per plant each.

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Transcriptional activity and epigenetic regulation of transposable element in the symbiotic fungus Rhizophagus irregularis

Project description:Arbuscular mycorrhizal (AM) fungi form mutualistic relationships with most land plant species. AM fungi have long been considered as ancient asexuals. Long-term clonal evolution would be remarkable for a eukaryotic lineage and suggests the importance of alternative mechanisms to promote genetic variability facilitating adaptation. Here, we assessed the potential of transposable elements (TEs) for generating genomic diversity. The dynamic expression of TEs during Rhizophagus irregularis spore development suggests ongoing TE activity. We find Mutator-like elements located near genes belonging to highly expanded gene families. Characterising the epigenomic status of R. irregularis provides evidence of DNA methylation and small RNA production occurring at TE loci. Our results support a potential role for TEs in shaping the genome, and roles for DNA methylation and small RNA-mediated silencing in regulating TEs. A well-controlled balance between TE activity and repression may therefore contribute to genome evolution in AM fungi.

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