title: Dynamics of 15N natural abundance in wood-decomposing fungi and their ecophysiological implications.
abstract: Nine species of basidiomycota and one species of ascomycota were grown in an ammonium sulphate media and on beech wood; and the general (15)N dynamic patterns of the hyphae were examined. The fungal body initially became depleted in (15)N in both the types of incubation. However, the underlying mechanisms were quite different, that is, significant fungal (15)N drop on the beech wood is associated with the fungal N reallocation and the uptake of atmospheric ammonia and/or NO(x), in addition to isotope fractionation during assimilation. Although the (15)N values of the wood-decomposing basidiocarps were generally close to the (15)N values of the wood, it does not always indicate that the wood derived N was the sole N source for the fungi throughout the growth periods as shown in our wood-decomposing experiment.
authors.affiliation: Japan Science and Technology Agency, Otsu, Shiga, Japan. kohzu@ecology.kyoto-u.ac.jp
authors.forename: Ayato
authors.initials: A
authors.lastname: Kohzu
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Miyajima
authors.forename: Takahiro
authors.initials: T
authors.lastname: Tateishi
authors.forename: Takashi
authors.initials: T
authors.lastname: Watanabe
authors.forename: Munezoh
authors.initials: M
authors.lastname: Takahashi
authors.forename: Eitaro
authors.initials: E
authors.lastname: Wada
mesh_terms: D000645:Ammonium Sulfate / Q000378:metabolism*; D001203:Ascomycota / Q000378:metabolism*; D001487:Basidiomycota / Q000378:metabolism*; D004463:Ecology; D029964:Fagus / Q000378:metabolism* / Q000382:microbiology; D007700:Kinetics; D009587:Nitrogen Isotopes / Q000378:metabolism; D014934:Wood / Q000378:metabolism / Q000382:microbiology
chemical_list: D009587:Nitrogen Isotopes; D000645:Ammonium Sulfate