Cold adaptation in the phytopathogenic fungi causing snow molds

@article{Hoshino2009ColdAI,
  title={Cold adaptation in the phytopathogenic fungi causing snow molds},
  author={Tamotsu Hoshino and Nan Xiao and O. B. Tkachenko},
  journal={Mycoscience},
  year={2009},
  volume={50},
  pages={26-38}
}
Snow molds are psychrophilic or psychrotrophic fungal pathogens of forage crops, winter cereals, and conifer seedlings. These fungi can grow and attack dormant plants at low temperatures under snow cover. In this review, we describe the biodiversity and physiological and biochemical characteristics of snow molds that belong to various taxa. Cold tolerance is one of the important factors related to their geographic distribution, because snow molds develop mycelia under snow cover and because… 

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References

SHOWING 1-10 OF 90 REFERENCES

Cold adaptation in Arctic and Antarctic fungi

TLDR
Growth and activity at low temperatures and possible physiological and ecological mechanisms underlying survival of fungi isolated from the cold Arctic and Antarctic are reviewed andMelanin in dark septate hyphae, which predominate in polar soils, could protect hyphAE from extreme temperatures and play a significant role in their persistence from year to year.

Host water potentials may restrict development of snow mould fungi in low temperature‐hardened grasses

TLDR
Reduced availability of water may partly explain increased resistance to fungal pathogens in grasses after hardening and a significant decrease in water potentials from hardened plants compared with unhardened plants.

Role of ice nucleation and antifreeze activities in pathogenesis and growth of snow molds.

TLDR
The lack of high ice nucleation activity combined with the presence of antifreeze activity in all fungal fractions indicates that snow molds can moderate their environment to inhibit or modify intra- and extracellular ice formation, which helps explain their ability to grow at subzero temperatures under snow cover.

Growth and respiration of psychrophilic species of the genus Typhula

Growth of three snow mold fungi, Typhula idahoensis Remsb., T. incarnata Lasch ex Fr., and T. trifolii Rostr., was studied in agar and liquid culture. T. idahoensis was grown successfully in shake

Snow mold fungus, Typhula ishikariensis group III, in Arctic Norway can grow at a sub-lethal temperature after freezing stress and during flooding

TLDR
Results suggested that group III isolates can grow at a sub-lethal temperature after freezing stress and during flooding, and physiological characteristics of group III isolate are well adapted to climatic conditions in the Arctic.

Damage to Abies koreana seeds by soil-borne fungi on Mount Halla, Korea

TLDR
R. therryanum caused a total loss of germination ability in A. koreana seeds at 0 °C after 100 days and was negatively correlated with the seed germination rate.

Snow mould caused by a Pythium sp.: a potential vascular plant pathogen in the maritime Antarctic

The pathogenicity of an isolate of a Pythium species from Signy Island in the South Orkney Islands was tested against the Antarctic hairgrass Deschampsia antarctica. The isolate was found to infect

PRELIMINARY STUDIES OF THE PHYSIOLOGY OF SCLEROTINIA BOREALIS, A HIGHLY PSYCHROPHILIC FUNGUS

TLDR
The results indicated that the fungus is highly psychrophilic with an optimum temperature for growth at 0 °C, a maximum at approximately 15 °C; and a minimum below −5 °C.

Submerged batch culture of the psychrophile Monographella nivalis in a defined medium; growth, carbohydrate utilization and responses to temperature.

TLDR
An asporogenous strain of the pink snow mould fungus, Monographella nivalis (Schaffnit), grew at 5 °C on a denned salts medium plus vitamins and utilized a variety of simple and polymeric carbohydrates as the sole carbon and energy source, and regulation of invertase expression appeared to be by sucrose-induction, rather than by end-product repression.

Phacidium snow blight in the Baltic countries

Distribution of a polemic in Baltic countries forest disease – snow blight and its agent Phacidium infestans Karst. (Phacidiales, Ascomycota ) are discussed on the base of the investigations carried
...