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Dynamics of ^1^3C natural abundance in wood decomposing fungi and their ecophysiological implications [An article from: Soil Biology and Biochemistry]
Book Details
PublisherElsevier
ISBN / ASINB000RR6TCO
ISBN-13978B000RR6TC4
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Soil Biology and Biochemistry, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Factors that affect the @d^1^3C values of fungi need to be analyzed for the progress of isotope-based studies of food-chain or organic matter dynamics in soils. To analyze the factors that control @d^1^3C values of the fungal body, basidiomycete and ascomycete species were grown on a beechwood substrate (six species) and in glucose medium (nine species), and the @d^1^3C value of produced fungal body was compared to that of the carbon source. The ^1^3C enrichment (@D@d^1^3C) in the fungal aggregates compared to the decomposed wood varied from 1.2 to 6.3%% among six species. In the glucose substrate experiment, the degree of ^1^3C enrichment in the hyphal mat was relatively small and varied from -0.1 to 2.8%% among nine basidiomycetes species depending on their growth stage. Calculated @d^1^3C values of the respired CO"2 were lower than those of the hyphal mat, organic metabolites and the glucose used. The degree of ^1^3C enrichment was affected by fungal species, substrate and growth stage. Fungal internal metabolic processes are the plausible mechanism for the observed isotopic discrimination between fungal bodies and substrates. Especially, dark fixation of ambient CO"2 and kinetic isotope fractionation during assimilation and dissimilation reactions could well explain @D@d^1^3C dynamics in our experiments. Through the analysis of field @D@d^1^3C, we could know undisturbed fungal status about starvation, aeration and type of decomposition.
Description:
Factors that affect the @d^1^3C values of fungi need to be analyzed for the progress of isotope-based studies of food-chain or organic matter dynamics in soils. To analyze the factors that control @d^1^3C values of the fungal body, basidiomycete and ascomycete species were grown on a beechwood substrate (six species) and in glucose medium (nine species), and the @d^1^3C value of produced fungal body was compared to that of the carbon source. The ^1^3C enrichment (@D@d^1^3C) in the fungal aggregates compared to the decomposed wood varied from 1.2 to 6.3%% among six species. In the glucose substrate experiment, the degree of ^1^3C enrichment in the hyphal mat was relatively small and varied from -0.1 to 2.8%% among nine basidiomycetes species depending on their growth stage. Calculated @d^1^3C values of the respired CO"2 were lower than those of the hyphal mat, organic metabolites and the glucose used. The degree of ^1^3C enrichment was affected by fungal species, substrate and growth stage. Fungal internal metabolic processes are the plausible mechanism for the observed isotopic discrimination between fungal bodies and substrates. Especially, dark fixation of ambient CO"2 and kinetic isotope fractionation during assimilation and dissimilation reactions could well explain @D@d^1^3C dynamics in our experiments. Through the analysis of field @D@d^1^3C, we could know undisturbed fungal status about starvation, aeration and type of decomposition.
