Phototactic behaviour and the role of light in host transmission of Bursaphelenchus xylophilus
Phototactic behaviour and the role of light in host transmission of Bursaphelenchus xylophilus
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松材线虫的趋光行为和光在宿主传播中的作用
DOI：
10.1163/15685411-00003186
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发表时间：
2018
期刊：
影响因子：
1.2
通讯作者：
Jiafu Hu
中科院分区：
文献类型：
--
作者：
Zhitao Xia;Liqun Bai;Bicheng Sheng;Xingyao Zhang;Stefan Schuetz;Hongshi Yu;Jiafu Hu
松材线虫是松材线虫病的病原。为了了解光对PWN的影响，我们研究了它的趋光行为。结果表明，繁殖种群对红、橙、黄、绿、蓝、白光有明显的正反应，而对紫光有微弱的负反应。然而，对于年龄同步的繁殖线虫，趋光行为特征随着发育而改变。有趣的是，扩散的第四阶段幼虫(JIV)对所有测试的光都表现出负反应，这几乎与繁殖第四阶段的幼虫(J4)完全相反。进一步的生物测定证明，绿光、蓝光和白光抑制了寄主从媒介甲虫向健康松枝的传播。结果表明，夜间可能是寄主传播的高峰期。根据前人的研究结果，我们推测寄主树木的挥发物和光可能起到了拉动和推动作用，加速了B的寄主传播。松材线虫。
The pine wood nematode (PWN) Bursaphelenchus xylophilusis the causal agent of pine wilt disease (PWD). To understandthe light influence on PWN, we investigated its phototactic behaviour. Our data indicated the mixed population of propagative PWN hada positive response to red, orange, yellow, green, blue and white lights, but a weak negative response to violet. For age-synchronisedpropagative nematodes, however, phototactic behavioural features changed with development. Interestingly, the dispersal fourth-stagejuveniles (JIV) showed negative response to all tested lights, which was almost completely the reverse of the propagative fourth-stage juveniles (J4). Further bioassays proved that green, blue and white lights suppressed the host transmission of dispersal JIVfromvector beetle to healthy pine branches. Our results revealed that night could be the peak of host transmission. With the results ofprevious studies, we speculate volatiles from the host tree and light may play pull-and-push roles to accelerate the host transmission ofB. xylophilus.