Genome-level analyses resolve an ancient lineage of symbiotic ascomycetes

Díaz-Escandón, David; Tagirdzhanova, Gulnara; Vanderpool, Dan; Allen, Carmen C.G.; Aptroot, André; Češka, Oluna; Hawksworth, David L.; Huereca, Alejandro; Knudsen, Kerry; Kocourková, Jana; Lücking, Robert; Resl, Philipp; Spribille, Toby

doi:10.1016/j.cub.2022.11.014

Cited by 20 publications

(14 citation statements)

References 99 publications

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“…As we were working on the problem, we were contacted by a research group who had sequenced the whole genome of one of our collections of C. heppii (Arnold) K. Knudsen and Arcadia. The excellent paper confirms our unpublished results that Caeruleum is not a member of Acarosporales (Díaz-Escandón et al 2022).…”

supporting

confidence: 86%

Acarosporaceae of New Mexico: Eight New Species of Acarospora and Sarcogyne

Knudsen

Kocourková

Hodková

et al. 2023

Western North American Naturalist

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supporting

confidence: 86%

Acarosporaceae of New Mexico: Eight New Species of Acarospora and Sarcogyne

Knudsen

Kocourková

Hodková

et al. 2023

Western North American Naturalist

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“…C. Presence of C. viridis across lichen taxonomic groups. The tree represents the phylogeny of lichen mycobionts modified from Tagirdzhanova et al [67] and Díaz-Escandón et al [71]; only taxa included in the metagenomic screening are shown. Green dots show taxonomic groups for which C. viridis was detected, with the prevalence ratios shown to the right.…”

Section: Resultsmentioning

confidence: 99%

Genomic analysis ofCoccomyxa viridis, a common low-abundance alga associated with lichen symbioses

Tagirdzhanova,

Scharnagl,

Yan

et al. 2023

Preprint

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Lichen symbiosis is centered around a relationship between a fungus and a photosynthetic microbe, usually a green alga. In addition to their main photosynthetic partner (the photobiont), lichen symbioses can contain additional algae present in low abundance. The biology of these algae and the way they interact with the rest of lichen symbionts remains largely unknown. Here we present the first genome sequence of a non-photobiont lichen-associated alga.Coccomyxa viridiswas unexpectedly found in 12% of publicly available lichen metagenomes. With few exceptions, members of theCoccomyxa viridisclade occur in lichens as non-photobionts, potentially growing in thalli endophytically. The 45.7 Mbp genome ofC. viridiswas assembled into 18 near chromosome-level contigs, making it one of the most contiguous genomic assemblies for any lichen-associated algae. Comparing theC. viridisgenome to its close relatives revealed the presence of traits associated with the lichen lifestyle. The genome ofC. viridisprovides a new resource for exploring the evolution of the lichen symbiosis, and how symbiotic lifestyles shaped evolution in green algae.

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“…( c ) Presence of C. viridis across lichen taxonomic groups. The tree represents the phylogeny of lichen mycobionts modified from Tagirdzhanova et al 69 and Díaz-Escandón et al 73 ; only taxa included in the metagenomic screening are shown. Green dots show taxonomic groups for which C. viridis was detected, with the prevalence ratios shown to the right.…”

Section: Resultsmentioning

confidence: 99%

Genomic analysis of Coccomyxa viridis, a common low-abundance alga associated with lichen symbioses

Tagirdzhanova,

Scharnagl,

Yan

et al. 2023

Sci Rep

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View full text Add to dashboard Cite

Lichen symbiosis is centered around a relationship between a fungus and a photosynthetic microbe, usually a green alga. In addition to their main photosynthetic partner (the photobiont), lichen symbioses can contain additional algae present in low abundance. The biology of these algae and the way they interact with the rest of lichen symbionts remains largely unknown. Here we present the first genome sequence of a non-photobiont lichen-associated alga. Coccomyxa viridis was unexpectedly found in 12% of publicly available lichen metagenomes. With few exceptions, members of the Coccomyxa viridis clade occur in lichens as non-photobionts, potentially growing in thalli endophytically. The 45.7 Mbp genome of C. viridis was assembled into 18 near chromosome-level contigs, making it one of the most contiguous genomic assemblies for any lichen-associated algae. Comparing the C. viridis genome to its close relatives revealed the presence of traits associated with the lichen lifestyle. The genome of C. viridis provides a new resource for exploring the evolution of the lichen symbiosis, and how symbiotic lifestyles shaped evolution in green algae.

show abstract

Genome-level analyses resolve an ancient lineage of symbiotic ascomycetes

Cited by 20 publications

References 99 publications

Acarosporaceae of New Mexico: Eight New Species of Acarospora and Sarcogyne

Acarosporaceae of New Mexico: Eight New Species of Acarospora and Sarcogyne

Genomic analysis ofCoccomyxa viridis, a common low-abundance alga associated with lichen symbioses

Genomic analysis of Coccomyxa viridis, a common low-abundance alga associated with lichen symbioses

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