Linnakoski Riikka, Kasanen Risto, Lasarov Ilmeini, Marttinen Tiia, Oghenekaro Abbot O, Sun Hui, Asiegbu Fred O, Wingfield Michael J, Hantula Jarkko, Heliövaara Kari
Department of Forest Sciences, University of Helsinki, Helsinki, Finland.
Natural Resources Institute Finland (Luke), Helsinki, Finland.
Antonie Van Leeuwenhoek. 2018 Nov;111(11):2195-2211. doi: 10.1007/s10482-018-1112-y. Epub 2018 Jun 14.
Symbiosis with microbes is crucial for survival and development of wood-inhabiting longhorn beetles (Coleoptera: Cerambycidae). Thus, knowledge of the endemic fungal associates of insects would facilitate risk assessment in cases where a new invasive pest occupies the same ecological niche. However, the diversity of fungi associated with insects remains poorly understood. The aim of this study was to investigate fungi associated with the native large poplar longhorn beetle (Saperda carcharias) and the recently introduced Asian longhorn beetle (Anoplophora glabripennis) infesting hardwood trees in Finland. We studied the cultivable fungal associates obtained from Populus tremula colonised by S. carcharias, and Betula pendula and Salix caprea infested by A. glabripennis, and compared these to the samples collected from intact wood material. This study detected a number of plant pathogenic and saprotrophic fungi, and species with known potential for enzymatic degradation of wood components. Phylogenetic analyses of the most commonly encountered fungi isolated from the longhorn beetles revealed an association with fungi residing in the Cadophora-Mollisia species complex. A commonly encountered fungus was Cadophora spadicis, a recently described fungus associated with wood-decay. In addition, a novel species of Cadophora, for which the name Cadophora margaritata sp. nov. is provided, was isolated from the colonised wood.
与微生物的共生关系对于栖息在木材中的天牛（鞘翅目：天牛科）的生存和发育至关重要。因此，了解昆虫特有的真菌共生体将有助于在新的入侵害虫占据相同生态位的情况下进行风险评估。然而，与昆虫相关的真菌多样性仍知之甚少。本研究的目的是调查与芬兰本土大型杨树天牛（Saperda carcharias）以及最近引入的侵害硬木树的亚洲长角天牛（Anoplophora glabripennis）相关的真菌。我们研究了从被S. carcharias侵染的欧洲山杨、被A. glabripennis侵染的垂枝桦和黄花柳中获得的可培养真菌共生体，并将其与从完整木材材料中采集的样本进行比较。本研究检测到了一些植物病原真菌和腐生真菌，以及已知具有降解木材成分酶潜力的物种。对从天牛中分离出的最常见真菌进行的系统发育分析表明，它们与Cadophora - Mollisia物种复合体中的真菌有关联。一种常见的真菌是Cadophora spadicis，这是一种最近描述的与木材腐朽相关的真菌。此外，还从被侵染的木材中分离出了一种新的Cadophora物种，为此提供了新名称Cadophora margaritata sp. nov.。
