Chang Runlei, Duong Tuan A, Taerum Stephen J, Wingfield Michael J, Zhou XuDong, de Beer Z Wilhelm
Department of Biochemistry, Genetics & Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0002 South Africa.
College of Life Sciences, Shandong Normal University, Jinan, 250014 China.
IMA Fungus. 2020 Jul 30;11:15. doi: 10.1186/s43008-020-00037-9. eCollection 2020.
Bark beetle galleries are complex ecosystems where many microbes and other arthropods co-exist with the beetles. Fungi isolated from these galleries are often referred to as 'beetle associates', but the nature of these associations are poorly understood. The possibility that many of these fungi might in fact be mite associates is often overlooked. Several recent studies explored the diversity of fungi from conifer-infesting bark beetles and their galleries in China, but only one study considered phoretic mites and their fungi from conifer-infesting bark beetles in Yunnan, southwestern China. We studied the mites and fungi from galleries of four spruce-infesting bark beetle species in the high altitude forests of Qinghai province, western China. Mites were identified based on morphological characteristics, and fungi based on DNA sequences of four gene regions. In total, 173 mite individuals were collected belonging to 18 species in 11 genera. A total of 135 fungal isolates were obtained from the mites, representing 14 taxa from the The most frequently isolated fungus was , which represented 23.5% of the total isolates. More fungal species were found from fewer mites and bark beetle species than from the study in Yunnan. Although we could not elucidate the exact nature of interactions between mites and their fungi, our results re-enforce that these organisms should not be ignored in pest risk assessments of bark beetles, that often focus only on the beetles and their fungi. Three new species are described: , and spp. nov., and our data revealed that , recently described from China, is a synonym of .
小蠹虫蛀道是复杂的生态系统，许多微生物和其他节肢动物与小蠹虫共存。从这些蛀道中分离出的真菌通常被称为“与小蠹虫相关的真菌”，但这些关联的本质却知之甚少。实际上，许多这类真菌可能是与螨类相关的真菌，这一可能性常常被忽视。最近的几项研究探讨了中国针叶树侵害性小蠹虫及其蛀道中的真菌多样性，但只有一项研究考虑了中国西南部云南省针叶树侵害性小蠹虫的携播螨类及其真菌。我们研究了中国西部青海省高海拔森林中四种侵害云杉的小蠹虫蛀道中的螨类和真菌。螨类根据形态特征进行鉴定，真菌根据四个基因区域的DNA序列进行鉴定。总共收集到173只螨个体，分属于11个属的18个物种。从螨类中总共获得了135个真菌分离株，代表了14个分类单元。最常分离到的真菌是 ，占分离株总数的23.5%。与云南的研究相比，在较少的螨类和小蠹虫物种中发现了更多的真菌物种。尽管我们无法阐明螨类与其真菌之间相互作用的确切性质，但我们的结果再次强调，在通常仅关注小蠹虫及其真菌的小蠹虫害虫风险评估中，这些生物体不应被忽视。描述了三个新物种： 、 和 新种，并且我们的数据表明，最近在中国描述的 是 的同义词。
