ArticleGenome biology and evolution2014
The mitochondrial genome of the glomeromycete Rhizophagus sp. DAOM 213198 reveals an unusual organization consisting of two circular chromosomes.
Article in Genome biology and evolution, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 14 citations in OpenAlex.
- Characterization and phylogenetic analysis of the complete mitochondrial genome of the medicinal fungus Laetiporus sulphureus.Scientific reports · 2018Article
- Real-time PCR quantification of arbuscular mycorrhizal fungi: does the use of nuclear or mitochondrial markers make a difference?Mycorrhiza · 2017Article
- The large (134.9 kb) mitochondrial genome of the glomeromycete Funneliformis mosseae.Mycorrhiza · 2016Article
- Molecular diagnostic toolkit for Rhizophagus irregularis isolate DAOM-197198 using quantitative PCR assay targeting the mitochondrial genome.Mycorrhiza · 2016Article
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3 authors at 1 institution in 1 country.
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Abstract
Mitochondrial (mt) genomes are intensively studied in Ascomycota and Basidiomycota, but they are poorly documented in basal fungal lineages. In this study, we sequenced the complete mtDNA of Rhizophagus sp. DAOM 213198, a close relative to Rhizophagus irregularis, a widespread, ecologically and economical relevant species belonging to Glomeromycota. Unlike all other known taxonomically close relatives harboring a full-length circular chromosome, mtDNA of Rhizophagus sp. reveals an unusual organization with two circular chromosomes of 61,964 and 29,078 bp. The large chromosome contained nine protein-coding genes (atp9, nad5, cob, nad4, nad1, nad4L, cox1, cox2, and atp8), small subunit rRNA gene (rns), and harbored 20 tRNA-coding genes and 10 orfs, while the small chromosome contained five protein-coding genes (atp6, nad2, nad3, nad6, and cox3), large subunit rRNA gene (rnl) in addition to 5 tRNA-coding genes, and 8 plasmid-related DNA polymerases (dpo). Although structural variation of plant mt genomes is well documented, this study is the first report of the presence of two circular mt genomes in arbuscular mycorrhizal fungi. Interestingly, the presence of dpo at the breakage point in intergenes cox1-cox2 and rnl-atp6 for large and small mtDNAs, respectively, could be responsible for the conversion of Rhizophagus sp. mtDNA into two chromosomes. Using quantitative real-time polymerase chain reaction, we found that both mtDNAs have an equal abundance. This study reports a novel mtDNA organization in Glomeromycota and highlights the importance of studying early divergent fungal lineages to describe novel evolutionary pathways in the fungal kingdom.
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