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Tolerance of ectomycorrhizal fungus mycelium to low temperature and freezing–thawing

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Very little is known about the tolerance of ectomycorrhizal fungi to the freezing and repetitive freezing–thawing in northern coniferous forests. Isolates of Cortinarius multiformis, Russula densifolia, Suillus granulatus, and Lactarius deliciosus were exposed to a series of temperatures between +4 and –40 °C. The relative electrolyte leakage test indicated that the lethal temperature for 50% of samples was between –7.6 and –13.7 °C. Resume growth experiments showed that the 4 species of ectomycorrhizal fungi had a relatively high tolerance to the low temperatures, with L. deliciosus having the highest tolerance and C. multiformis the lowest. The repeated freezing–thawing delayed the growth of mycelium, which decreased with an increase in the number of freeze–thaw cycles.

Keywords: champignon ectomycorhize; congélation–décongélation; ectomycorrhiza fungi; freezing tolerance; freezing–thawing; tolérance au gel

Document Type: Research Article


Affiliations: 1: College of Forestry, Northeast Forestry University, Harbin, Heilongjiang Province, 150040, China. 2: Forestry Diseases and Pest Control Station of Heilongiiang Province, Harbin, Heilongjiang Province, 150040, China.

Publication date: April 8, 2011

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  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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