Beijing Key Laboratory for Forest Pest Control, Beijing Forestry University, Beijing, 100083, China.
Sino-France Joint Laboratory for Invasive Forest Pest in Eurasia, Beijing, 100083, China.
Sci Rep. 2019 Mar 25;9(1):5077. doi: 10.1038/s41598-019-41419-3.
Diversity of endophyte communities of the host tree affects the oviposition behavior of Sirex noctilio and the growth of its symbiotic fungus Amylostereum areolatum. In this study, we evaluated the structure and distribution of endophyte communities in the host tree (Pinus sylvestris var. mongolica) of S. noctilio and eight potential host tree species in China. Overall, 1626 fungal strains were identified by using internal transcribed spacer sequencing and morphological features. Each tree species harbored a fungal endophyte community with a unique structure, with the genus Trichoderma common to different communities. The isolation and colonization rate of endophytes from Pinus tabulaeformis, followed by P. sylvestris var. mongolica, were lower than those of other species. The proportion of endophytic fungi that strongly inhibited S. noctilio and symbiotic fungus growth was significantly lower in P. tabulaeformis, P. sylvestris var. mongolica and P. yunnanensis. Further, the diversity of the endophyte communities appeared to be predominantly influenced by tree species and the region, and, to a lesser extent, by the trunk height. Collectively, the data indicated that P. tabulaeformis might be at a higher risk of invasion and colonization by S. noctilio than other trees.
内生真菌群落的多样性会影响星天牛的产卵行为及其共生真菌平腹小蜂的生长。在这项研究中，我们评估了星天牛宿主树（蒙古栎）和中国 8 种潜在宿主树的内生真菌群落的结构和分布。通过内部转录间隔区测序和形态特征，共鉴定出 1626 株真菌菌株。每个树种都有一个独特结构的内生真菌群落，其中木霉属是不同群落共有的。从白皮松和蒙古栎中分离和定殖内生菌的比率低于其他树种。强烈抑制星天牛和共生真菌生长的内生真菌的比例在白皮松、蒙古栎和云南松中显著较低。此外，内生真菌群落的多样性主要受树种和区域的影响，而树干高度的影响较小。总的来说，这些数据表明，白皮松可能比其他树种更容易受到星天牛的入侵和定殖。
