Unbound MEDLINE

The role of chitin in the decomposition of ectomycorrhizal fungal litter.

Abstract

Ectomycorrhizal fungal tissues comprise a significant forest-litter pool. Ectomycorrhizal (EM) fungi may also influence the decomposition of other forest-litter components via competitive interactions with decomposer fungi and by ensheathing fine roots. Because of these direct and indirect effects of ectomycorrhizal fungi, the factors that control the decomposition of EM fungi will strongly control forest-litter decomposition as a whole and, thus, ecosystem nutrient and carbon cycling. Some have suggested that chitin, a component of fungal cell walls, reduces fungal tissue decomposition because it is relatively recalcitrant. We therefore examined the change in chitin concentrations of EM fungal tissues during decomposition. Our results show that chitin is not recalcitrant relative to other compounds in fungal tissues and that its concentration is positively related to the decomposition of fungal tissues. Variation existing among EM fungal isolates in chitin concentration suggests that EM fungal community structure influences C and nutrient cycling.

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  • Authors

    Fernandez CW, Koide RT

    Institution

    Intercollege Graduate Program in Ecology, 103 Tyson Building, Pennsylvania State University, University Park, Pennsylvania 16802, USA. cwf123@psu.edu

    Source

    Ecology 93:1 2012 Jan pg 24-8

    MeSH

    Carbon Cycle
    Chitin
    Ecosystem
    Mycelium
    Mycorrhizae
    Soil
    Species Specificity
    Time Factors
    Trees

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    22486083