Journal of Nematology (2017) 49, 341-347

Bin Zhang, Wei Zhang, Min Lu, Faheem Ahmad, Haokai Tian, Jing Ning, Xiaolong Liu, Jing Ning, Xiaolong Liu, Lilin Zhao and Jianghua Sun (2017)
Chemical signals of vector beetle facilitate the prevalence of a native fungus and the invasive pinewood nematode
Journal of Nematology 49 (4), 341-347
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.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: English)
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Database assignments for author(s): Jiang-Hua Sun, Faheem Ahmad

Research topic(s) for pests/diseases/weeds:
transmission/dispersal of plant diseases

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bursaphelenchus xylophilus	Pine (Pinus)	China (south)
	Monochamus alternatus	Pine (Pinus)	China (south)
	Ophiostoma ips	Pine (Pinus)	China (south)