The population structure and sex ratios of Bursaphelenchus xylophilus under α-pinene stress
The population structure and sex ratios of Bursaphelenchus xylophilus under α-pinene stress
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DOI：
10.1007/s11676-018-0847-7
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发表时间：
2020-06-01
影响因子：
3
通讯作者：
Zhang, Xing-Yao
中科院分区：
文献类型：
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作者：
Cui, Jing;Li, Yong-Xia;Zhang, Xing-Yao
松材线虫是一种严重危害松树的病害。以前的工作表明，不同浓度的α-蒎烯可以影响线虫的繁殖，但这种影响的机制尚不清楚。为了研究松材线虫对挥发性物质α-蒎烯胁迫的繁殖策略，我们研究了松材线虫在两种浓度下种群数量变化的不同方面。结果表明，高浓度(214.5 mg m l-1)促进种群增长，低浓度(56.33mgm l-1)则使种群减少。对种群结构进行了分析，发现高浓度的α-蒎烯降低了成虫的百分率，但增加了幼虫和卵的百分率。此外，从性别比(女性/男性)的评估结果中确定，高浓度可以提高性别比，但低浓度会使性别比急剧下降。这些结果表明，白纹伊蚊在α-品烯胁迫下可能通过改变性别比例来调节种群数量。本研究为松材线虫引起的松材线虫病防治提供了理论依据。
Pine wood nematode (PWN), Bursaphelenchus xylophilus, is a serious pathogen of pines throughout the world. Previous work indicated that different concentrations of alpha-pinene could affect nematode reproduction, however the mechanism of that influence is not clear. In order to examine the reproductive strategies of PWN in response to the stress of the volatile material alpha-pinene, we investigated different aspects of population changes of B. xylophilus under two concentrations of alpha-pinene. The results show that a high concentration (214.5 mg ml(-1)) promoted population growth while a low concentration (56.33 mg ml(-1)) decreased the population. Population structure was analyzed and it was found that a high concentration of alpha-pinene decreased the percentage of adults but increased the percentages of larvae and eggs. Furthermore, from the results of an evaluation of sex ratios (female/male), it was determined that a high concentration could elevate sex ratios but a low concentration decreased ratios sharply. These results suggest that the PWN could regulate its population by changing sex ratios under stress of alpha-pinene. This study has provided a theoretical basis for the prevention and control of pine wilt disease caused by the pine wood nematode.