Temperature adaptations of Cordyceps militaris, impact of host thermal biology and immunity on mycosis development
| Autor: | O. N. Yaroslavtseva, Natalia A. Kryukova, Viktor V. Glupov, Yuri S. Tokarev, Oksana G. Tomilova, Vadim Yu. Kryukov, Olga V. Polenogova, Ting-Chi Wen |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Ecology biology Host (biology) Ecological Modeling fungi Zoology Virulence Plant Science Diapause biology.organism_classification 010603 evolutionary biology 01 natural sciences Galleria mellonella 03 medical and health sciences 030104 developmental biology Cordyceps militaris Genetic variation Metarhizium Beauveria Ecology Evolution Behavior and Systematics |
| Zdroj: | Fungal Ecology. 35:98-107 |
| ISSN: | 1754-5048 |
| Popis: | Temperature preferences, virulence properties and genetic relationships inferred from tef1-alpha gene sequencing were determined for Cordyceps militaris isolates from the Palearctic region. The variability of the mycelial growth rate of different isolates was extremely low at 5–30 °C. However, correlations among genetic variation, geographic origin and temperature responses were established. C. militaris cultures were not heat-active but were more psychrotolerant than Beauveria and Metarhizium isolates. The thermo-physiological state of the wax moth Galleria mellonella had a crucial role for the development of C. militaris. Larval diapause induced by decreasing temperature (15 °C) was most favourable for development of mycosis due to a drop in innate immunity. While fought off at 25 °C in the larvae, the infection could still be activated in pupae under cold conditions (15 °C). Differences in ecology and pathogenic strategies of C. militaris and the generalist fungi Beauveria and Metarhizium are discussed. |
| Databáze: | OpenAIRE |
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