Department of Renewable Resources, University of Alberta, Edmonton, Alberta, T6G 2E3, Canada.
Microb Ecol. 2020 Jul;80(1):181-190. doi: 10.1007/s00248-020-01490-0. Epub 2020 Feb 4.
Mountain pine beetle (MPB) has recently expanded its host range to the novel jack pine forests in Alberta. Invasion success of MPB may depend on the outcome of interactions between its symbiotic fungus Grosmannia clavigera and Ophiostoma ips, a fungal associate of a potential competitor Ips pini. However, how the quality of jack pine phloem could influence interactions between the fungi is unknown. We investigated whether introduced concentrations of host nitrogen and monoterpenes affect the growth of and interaction between the fungi. Nitrogen concentrations did not affect the growth rate of either fungus. In the absence of monoterpenes, the presence of O. ips promoted G. clavigera growth. Monoterpenes either promoted or inhibited the growth of both fungi, and altered the outcome of species interactions from facilitation to no-effect. Overall, these results suggest that jack pine phloem quality and the presence of a niche-sharing fungus could influence MPB development.
高山松甲虫（MPB）最近已将其宿主范围扩大到阿尔伯塔省的新型杰克松林中。MPB 的入侵成功可能取决于其共生真菌 Grosmannia clavigera 和 Ophiostoma ips 之间相互作用的结果，后者是潜在竞争者松墨天牛的真菌伴生物。然而，杰克松韧皮部的质量如何影响真菌之间的相互作用尚不清楚。我们调查了引入的寄主氮和单萜浓度是否会影响真菌的生长和相互作用。氮浓度不影响两种真菌的生长速度。在没有单萜的情况下，O.ips 的存在促进了 G. clavigera 的生长。单萜类化合物促进或抑制了两种真菌的生长，并改变了物种相互作用的结果，从促进变为无影响。总的来说，这些结果表明，杰克松韧皮部的质量和具有相似生态位的真菌可能会影响 MPB 的发育。
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