Change in the temperature preferences of Beauveria bassiana sensu lato isolates in the latitude gradient of Siberia and Kazakhstan

Kryukov, V. Yu.; Yaroslavtseva, O. N.; Elisaphenko, Eugeny A.; Mitkovets, P. V.; Lednev, G. R.; Duisembekov, B. A.; Zakian, Suren M.; Глупов, В. В.

doi:10.1134/s002626171204011x

Cited by 24 publications

(14 citation statements)

References 19 publications

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“…; Kryukov et al. ), but the adaptation of H. parviporum to local climate appeared small compared to the variation between local individual strains (Table , Figs and ). The extent to which the observed variation is heritable is unknown.…”

Section: Discussionmentioning

confidence: 93%

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Respiration rate determinations suggest Heterobasidion parviporum subpopulations have potential to adapt to global warming

et al. 2015

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Trees are known to have adapted to local climatic conditions, but the adaptation of their pathogenic associates is poorly understood. Heterobasidion parviporum causes root and butt rot in spruce. In this work, the respiration of H. parviporum subpopulations from climatically diverse environments was examined at various temperatures. Isolates were obtained from three areas in Europe (southern Finland, Denmark and northern Italy) and from two locations in Central Siberia (Krasnoyarsk and Irkutsk). Respiration rates were measured in gas tight vials at eight temperatures from 0 to 33°C, using spruce saw dust as the sole substrate. Strains from Siberian locations with cold winters had higher activity at low temperatures (2-15°C) than strains from European locations with mild winters. Respiration rates of Siberian subpopulations increased more than those of European strains when the temperature rose from 0 to 6°C, but the increase was greater with the European subpopulations when the temperature increased further from 6 to 20°C. Only small differences were found among European as well as Siberian subpopulations. Variation in respiration rates between subpopulations was low compared to variation within subpopulations. Using strains isolated 2-18 years ago and thereafter stored at 5°C, we found lower respiration rates at 20°C in older isolates, independent of geographical origin, suggesting phenotypic plasticity of H. parviporum in regard to responses to temperature. Based on these findings, we propose that subpopulations of H. parviporum have the potential to adapt to global warming.

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Section: Discussionmentioning

confidence: 93%

“… Kryukov et al. ), while in a few species, no signs of adaptation were noted (Latter and Heal ; Rice et al. ).…”

Section: Introductionmentioning

confidence: 99%

Respiration rate determinations suggest Heterobasidion parviporum subpopulations have potential to adapt to global warming

et al. 2015

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“…This temperature range it is not optimal for fungal growth and may explain why the larvae escape infection. For most EPF, including thermophilic strains, growth slows down or ceases between 30 and 40 °C (Rangel et al ., ; Kryukov et al ., ). Although they can tolerate brief exposure to even higher temperatures (e.g., 50 °C) for most strains 30 °C is the upper temperature threshold for growth (Ekesi et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Fungal infection dynamics in response to temperature in the lepidopteran insect Galleria mellonella

et al. 2017

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This study examines how the dynamics of fungus-insect interactions can be modulated by temperature. The wax moth, Galleria mellonella, is a well-studied and important model insect whose larvae in the wild develop optimally at around 34 °C in beehives. However, surprisingly little research on wax moths has been conducted at relevant temperatures. In this study, the entomopathogenic fungus Metarhizium robertsii inflicted rapid and substantial mortality on wax moth larvae maintained at a constant temperature of 24 °C, but at 34 °C a 10 fold higher dose was required to achieve an equivalent mortality. The cooler temperature favored fungal pathogenicity, with condial adhesion to the cuticle, germination and hemocoel invasion all significantly enhanced at 24 °C, compared with 34 °C. The wax moth larvae immune responses altered with the temperature, and with the infective dose of the fungus. Enzyme-based immune defenses (lysozyme and phenoloxidase) exhibited enhanced activity at the warmer temperature. A dramatic upregulation in the basal expression of galiomicin and gallerimycin was triggered by cooling, and this was augmented in the presence of the fungus. Profiling of the predominant insect epicuticular fatty acids revealed a 4-7 fold increase in palmetic, oleic and linoleic acids in larvae maintained at 24 °C compared with those at 34 °C, but these failed to exert fungistatic effects on topically applied fungus. This study demonstrates the importance of choosing environmental conditions relevant to the habitat of the insect host when determining the dynamics and outcome of insect/fungus interactions, and has particular significance for the application of entomopathogens as biocontrol agents.

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“…Similar effects were shown for natural isolates of Beauveria bassiana s.l. In particular, steppe isolates were more thermotolerant and most virulent toward wax moth and CPB under arid regimes as compared to forest and foresttundra isolates [8].…”

Section: Pathogen Virulence and Ecological Fitnessmentioning

confidence: 89%

Insect parasites in multicomponent systems and development of new bioinsecticides

2020

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Stable and dynamic interactions among plants, herbivorous insects, parasites and associated microbes are formed in natural habitats. The study of these interactions in multicomponent models is required to develop integrated methods for the management of insect pest populations. In this work, we summarize our studies on the influence of different factors, such as hygrothermal conditions, host development, host microbiota, plant quality, and concomitant infections, on interactions between insects and their parasites, such as fungi, bacteria, viruses and parasitoids. Some approaches for developing complex products for biocontrol are also discussed. For example, the use of natural compounds with immunosuppressive effects may enhance the efficacy of microbial agents toward pest insects.

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Change in the temperature preferences of Beauveria bassiana sensu lato isolates in the latitude gradient of Siberia and Kazakhstan

Cited by 24 publications

References 19 publications

Respiration rate determinations suggest Heterobasidion parviporum subpopulations have potential to adapt to global warming

Respiration rate determinations suggest Heterobasidion parviporum subpopulations have potential to adapt to global warming

Fungal infection dynamics in response to temperature in the lepidopteran insect Galleria mellonella

Insect parasites in multicomponent systems and development of new bioinsecticides

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