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Phylogenomic Analyses Indicate that Early Fungi Evolved Digesting Cell Walls of Algal Ancestors of Land Plants.

Chang Y, Wang S, Sekimoto S, Aerts AL, Choi C, Clum A, LaButti KM, Lindquist EA, Yee Ngan C, Ohm RA, Salamov AA, Grigoriev IV, Spatafora JW, Berbee ML - Genome Biol Evol (2015)

Bottom Line: In the organismal phylogeny from 136 housekeeping loci, Rozella diverged first from all other fungi.Indicating functional and sequence similarity, Gonapodya, like many Dikarya, can use pectin as a carbon source for growth in pure culture.This implies that 750 million years, the estimated maximum age of origin of the pectin-containing streptophytes represents a maximum age for the divergence of Chytridiomycota from the lineage including Dikarya.

View Article: PubMed Central - PubMed

Affiliation: Department of Botany, University of British Columbia, Vancouver, British Columbia niuerchang@gmail.com.

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Evolution of GH28 pectinase genes within the phylogeny of fungi, based on Notung-rearranged gene tree/species tree reconciliation. Branch thickness is proportional to pectinase copy number. The numerals above the branches are the copy numbers, followed by the number of duplication (D) or loss events (L) associated with the branch, both estimated by “Notung-rearranged analysis.” Within species, duplication and loss events are not counted. Following the genus name is its total number of GH28 gene copies. Pectinase gene expansions were concentrated on branches leading to node 1, which represents the most recent common ancestor of Chytridiomycota and terrestrial fungi, and to node 2, representing the common ancestor of Pezizomycotina.
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evv090-F2: Evolution of GH28 pectinase genes within the phylogeny of fungi, based on Notung-rearranged gene tree/species tree reconciliation. Branch thickness is proportional to pectinase copy number. The numerals above the branches are the copy numbers, followed by the number of duplication (D) or loss events (L) associated with the branch, both estimated by “Notung-rearranged analysis.” Within species, duplication and loss events are not counted. Following the genus name is its total number of GH28 gene copies. Pectinase gene expansions were concentrated on branches leading to node 1, which represents the most recent common ancestor of Chytridiomycota and terrestrial fungi, and to node 2, representing the common ancestor of Pezizomycotina.

Mentions: We inferred that the most recent common ancestor of all fungi possessed one or more copies of pectinases in seven gene families (table 1). Among the fungi, duplication events were concentrated in the common ancestor of Chytridiomycota and the terrestrial fungi (the clade including zygomycota I, zygomycota II, Ascomycota, and Basidiomycota) and in the common ancestor of Pezizomycotina (figs. 2 and 3). Supporting the finding that at least some of its pectinases are functional, G. prolifera (Chytridiomycota) grew significantly faster on media supplemented with pectic sugars than on unsupplemented, low carbon media (supplementary table S7, Supplementary Material online). As expected, A. niger (Ascomycota) also grew more quickly with pectic sugar supplements.Fig. 2.—


Phylogenomic Analyses Indicate that Early Fungi Evolved Digesting Cell Walls of Algal Ancestors of Land Plants.

Chang Y, Wang S, Sekimoto S, Aerts AL, Choi C, Clum A, LaButti KM, Lindquist EA, Yee Ngan C, Ohm RA, Salamov AA, Grigoriev IV, Spatafora JW, Berbee ML - Genome Biol Evol (2015)

Evolution of GH28 pectinase genes within the phylogeny of fungi, based on Notung-rearranged gene tree/species tree reconciliation. Branch thickness is proportional to pectinase copy number. The numerals above the branches are the copy numbers, followed by the number of duplication (D) or loss events (L) associated with the branch, both estimated by “Notung-rearranged analysis.” Within species, duplication and loss events are not counted. Following the genus name is its total number of GH28 gene copies. Pectinase gene expansions were concentrated on branches leading to node 1, which represents the most recent common ancestor of Chytridiomycota and terrestrial fungi, and to node 2, representing the common ancestor of Pezizomycotina.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4494064&req=5

evv090-F2: Evolution of GH28 pectinase genes within the phylogeny of fungi, based on Notung-rearranged gene tree/species tree reconciliation. Branch thickness is proportional to pectinase copy number. The numerals above the branches are the copy numbers, followed by the number of duplication (D) or loss events (L) associated with the branch, both estimated by “Notung-rearranged analysis.” Within species, duplication and loss events are not counted. Following the genus name is its total number of GH28 gene copies. Pectinase gene expansions were concentrated on branches leading to node 1, which represents the most recent common ancestor of Chytridiomycota and terrestrial fungi, and to node 2, representing the common ancestor of Pezizomycotina.
Mentions: We inferred that the most recent common ancestor of all fungi possessed one or more copies of pectinases in seven gene families (table 1). Among the fungi, duplication events were concentrated in the common ancestor of Chytridiomycota and the terrestrial fungi (the clade including zygomycota I, zygomycota II, Ascomycota, and Basidiomycota) and in the common ancestor of Pezizomycotina (figs. 2 and 3). Supporting the finding that at least some of its pectinases are functional, G. prolifera (Chytridiomycota) grew significantly faster on media supplemented with pectic sugars than on unsupplemented, low carbon media (supplementary table S7, Supplementary Material online). As expected, A. niger (Ascomycota) also grew more quickly with pectic sugar supplements.Fig. 2.—

Bottom Line: In the organismal phylogeny from 136 housekeeping loci, Rozella diverged first from all other fungi.Indicating functional and sequence similarity, Gonapodya, like many Dikarya, can use pectin as a carbon source for growth in pure culture.This implies that 750 million years, the estimated maximum age of origin of the pectin-containing streptophytes represents a maximum age for the divergence of Chytridiomycota from the lineage including Dikarya.

View Article: PubMed Central - PubMed

Affiliation: Department of Botany, University of British Columbia, Vancouver, British Columbia niuerchang@gmail.com.

Show MeSH