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Effects of Supraoptimal Temperatures on Merulius lacrymans
Author(s) -
Langvad Finn,
Goksøyr Jostein
Publication year - 1967
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1967.tb07213.x
Subject(s) - mycelium , respiration , nucleic acid , fungus , botany , biology , horticulture , biophysics , chemistry , biochemistry
The growth rate of Merulius lacrymans (Jacq.) Fr. decreases very rapidly at temperatures above optimum (about 22°C). No growth occurred above 28°C. The thermal death‐time of the fungus at different temperatures above maximum was determined. At 37.5°C the thermal death‐time is 4 hours. At this temperature, the respiration is not directly affected, since an appreciable respiration occurred even after 6 hours. On the basis of 14 C‐experiments and analysis of UV‐absorbing material excreted from the mycelium at supraoptimal temperatures, it is suggested that the detrimental effects of supraoptimal temperatures on this fungus include a degradation of the nucleic acids and a subsequent leakage of the nucleotides out of the cells.