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Botaniska Notiser 194(3, Häfte 1. Lund
Thiamin and Growth of Litter-Decomposing
Hymenomycetes.
Bv Gösta Lindeberg.
The inabilily to form vitamin Blt i.e. thiamin-heterotrophy, bas
heeu shown to be verv common witliin various ecologic groups of
hymenomycetes. N. Fries (1938) demonstrated that several
wooddestroy-ing polypori require the presence of vitamin B, for growth. Melin
and collahoralors (1939, 1940, 1941, 1912) have shown that this holds
also for varions mycorrhiza-forming hymenomycetes associated wilh
Ihe spruce and the pine. LiNDEBERG (1939. 1944) found that
thiamin-heterotrophy characterizes a great nnmher of lignin and cellulose
de-composing fungi growing on litter and helonging to the genus
Maras-mius. L. Fries (J945) recentlv studied several species of Coprinus
helonging lo the group of coprophile hymenomycetes, and found that
Ihiamin-helerotrophy was of common occurrence even witliin t Iiis
group. Schopper (1939, 1943) and Robbins & Kavanagh (1942),
published exhaustive surveys of the growth response of various fungi
to Ihiamin.
For the purpose of invesligating the abilily of various Swedish
fungi growing on lilter lo decompose lignin and cellulose the writer
grew in puré cultures numerous hymenomycetes which in Nature are
inliabitants of vegetahle decaying matter. The majori I v of the species
invesligated (see Tables) are tvpical inliabitants of the soil (e.g. Ihe
species of Clitocybe, Collybia, Lepiota and Mycena). The rest should
be looked upon as wood-dèstroying fungi (e.g. the species of
Ilypho-loma and of PhoUota, Flammula pcnetrans, Fanns stipticus and
Hyd-num corrugalum). In this connection il should be pointed out that as
vet il is not always possible to draw a well defined dividing line between
lliese Iwo groups.
It was found that the majoritv of these fungi decomposed not only
cellulose hut also lignin. The results of this investigation will be reported
in a future paper. In the attempt to contribule towards shedding some
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