Abstract

Ødegård, A.K.B. & Høiland, K. 1999. Effekt av nitrogenforbindelser på nedbrytersopper i barskog. Blyttia 57: 123-131.
Effects of nitrogen compounds on saprobic basidiomycetes in Norwegian coniferous forests.

A total of 28 isolates of the two saprobic basidiomycetes, Marasmius androsaceus and Mycena galopus, were sampled from three areas in Norway receiving different amounts of nitrogen pollution; Aust-Agder (high load), Oslo/Akershus (intermediate load), and Sør-Trøndelag (low load) respectively. The isolates were examined for nitrogen resistance given as KNO₃, (NH₄)₂SO₄, and NH₄NO₃ in amounts corresponding to 0, 0.125, 0.25, 0.5, 0.75, and 1 M nitrogen for each substance respectively. The results did not indicate any correspondence between nitrogen load in the environment and response on nitrogen in vitro. Nitrogen in the form of ammonium tended to have a different effect than nitrate on the two species. Mycena galopus seemed to be more sensitive to nitrogen in the form of nitrate than ammonium, while Marasmius androsaceus responded almost equally to both. The growth response was, for both species, dependant on the concentration of nitrate and/or ammonium, not the concentration of nitrogen as a whole.

Anne Kristine B. Ødegård & Klaus Høiland, Universitetet i Oslo, Biologisk institutt, avdeling for botanikk og plantefysiologi, Postboks 1045 Blindern, N-0316 Oslo, Norway.

Blyttia 57(3)
Blyttias hjemmeside
Lagt ut 10.12.1999 JW