Phylogenomic Analyses Indicate that Early Fungi Evolved Digesting Cell Walls of Algal Ancestors of Land Plants.
Bottom Line: Indicating functional and sequence similarity, Gonapodya, like many Dikarya, can use pectin as a carbon source for growth in pure culture.Shared pectinases of Dikarya and Gonapodya provide evidence that even ancient aquatic fungi had adapted to extract nutrients from the plants in the green lineage.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.
Affiliation: Department of Botany, University of British Columbia, Vancouver, British Columbia email@example.com.Show MeSH
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.—
Affiliation: Department of Botany, University of British Columbia, Vancouver, British Columbia firstname.lastname@example.org.