<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>In China, the invasive <italic>Bursaphelenchus xylophilus</italic>, the vector <italic>Monochamus alternatus</italic> beetle, and associated fungi exhibit a symbiotic relationship causing serious losses to pine forests. Although this complex system has been intensively investigated, the role of vector beetles on the development of associated fungi and their indirect contribution to the prevalence of pinewood nematode (PWN) is yet unknown. Here, three of the highly prevalent fungal species, viz., <italic>Sporothrix</italic> sp. 1, <italic>Ophiostoma ips</italic>, and <italic>Sporothrix</italic> sp. 2 were isolated from beetle chambers in diseased trees in Guangdong province, southeast China. Pairwise cultivation of isolated fungi demonstrated the dominance of <italic>Sporothrix</italic> sp. 1 over <italic>O. ips</italic> and <italic>Sporothrix</italic> sp. 2. On the other hand, two fatty acid ethyl esters (FAEE), ethyl palmitate (EP) and ethyl linoleate (EL), isolated from the body surface of the vector beetle enhanced the growth of <italic>Sporothrix</italic> sp. 1. When PWN were cultured on <italic>Sporothrix</italic> sp. 1, the fecundity and the body length were increased significantly as compared with when cultured on <italic>O. ips</italic> and <italic>Sporothrix</italic> sp. 1. Our results suggest that the vector beetles promote <italic>Sporothrix</italic> sp. 1 to occupy more niches by rapid growth and spread, which in turn better support PWN population, hence facilitate PWN pathogenicity in the invasive regions.</p>
</abstract>

In China, the invasive Bursaphelenchus xylophilus, the vector Monochamus alternatus beetle, and associated fungi exhibit a symbiotic relationship causing serious losses to pine forests. Although this complex system has been intensively investigated, the role of vector beetles on the development of associated fungi and their indirect contribution to the prevalence of pinewood nematode (PWN) is yet unknown. Here, three of the highly prevalent fungal species, viz., Sporothrix sp. 1, Ophiostoma ips, and Sporothrix sp. 2 were isolated from beetle chambers in diseased trees in Guangdong province, southeast China. Pairwise cultivation of isolated fungi demonstrated the dominance of Sporothrix sp. 1 over O. ips and Sporothrix sp. 2. On the other hand, two fatty acid ethyl esters (FAEE), ethyl palmitate (EP) and ethyl linoleate (EL), isolated from the body surface of the vector beetle enhanced the growth of Sporothrix sp. 1. When PWN were cultured on Sporothrix sp. 1, the fecundity and the body length were increased significantly as compared with when cultured on O. ips and Sporothrix sp. 1. Our results suggest that the vector beetles promote Sporothrix sp. 1 to occupy more niches by rapid growth and spread, which in turn better support PWN population, hence facilitate PWN pathogenicity in the invasive regions.

Chemical Signals of Vector Beetle Facilitate the Prevalence of a Native Fungus and the Invasive Pinewood Nematode

Journal of Nematology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

In China, the invasive Bursaphelenchus xylophilus, the vector Monochamus alternatus beetle, and associated fungi exhibit a symbiotic relationship causing...

Chemical Signals of Vector Beetle Facilitate the Prevalence of a Native Fungus and the Invasive Pinewood Nematode

Published Online: Sep 26, 2018

Page range: 341 - 347

Received: Jan 26, 2017

DOI: https://doi.org/10.21307/jofnem-2017-081

Keywords
blue-stain fungi, invasive species, pinewood nematode,

© 2017 BIN ZHANG et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Chemical Signals of Vector Beetle Facilitate the Prevalence of a Native Fungus and the Invasive Pinewood Nematode

Published Online: Sep 26, 2018

Page range: 341 - 347

Received: Jan 26, 2017

DOI: https://doi.org/10.21307/jofnem-2017-081

Keywordsblue-stain fungi, invasive species, pinewood nematode,

© 2017 BIN ZHANG et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
blue-stain fungi, invasive species, pinewood nematode,