Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 65. (Budapest 1973)

Bohus, G.: Soil acidity and the occurrence of fungi in deciduous forests

were stored until then in refrigerators, protected against desiccation). pH was measured 16-18 hours after mixing, at the temperature of the soil solutions, in the clear strain above the soil, with an electrical pH-meter, a combined glass electrode. Table 2. Data on the occurence of fungus species with ever widening pH amplitude in acidophilous and subacidophilous deciduous forests in 1951-1965 Acidophilous Subacidophilous forests forests pH( below 5) (pH above 5) Number 3f surveys Species 90 90 Number of fruitbodies on 500-500 m* Amanita rubescens 103 65 Gortinarius brunneofulvus 294 473 Cortinarius hinnuleus 93 204 Cortinarius triviális 74 22 Craterellus cornucopioides 2901 483 Hygrophorus eburneus 315 235 Inocybe asterospora 141 111 Laccaria laccata 1381 861 Lactarius pergamenus 171 61 Lycoperdon molle 88 90 Lycoperdon perlatum 87 322 Paxillus involutus 22 37 Russula acrifolia 79 45 Russula chamaeleontina 146 65 Russula foetens 188 87 Russula roméilii 61 til Russula virescens 33 17 Russula xerampelina 83 44 Tricholoma sulphureum 24 28 Table 3. The effect of pH on the utilisation of d-glucose and saccharose in synthetic culture solution by Agaricus macrosporoides

. Incubation at temperatures 22.5-24.5 C

a for 20 days. Carbon sources in 1 % amounts Nitrogen sources in 0.1 % amounts Initial pH Final pH Mycelial dry weight d-glucose pepton 6,5 6.8 6.9 93 saccharose pepton 6,5 7.0 7.1 12 saccharose glycocoll 6,5 6.8 7.1 7 set for pH 4.0 by phosphate buffer (1 part buffer solution + 1 part culture medium) d-glucose pepton 4.0 3.8 3.8 70 saccharose pepton 4.0 3.8 4.3 75 saccharose glycocoll 4.0 4.1 4.5 50