感染蜡样芽孢杆菌后存活的黑腹果蝇中Sigma病毒(DMelSV)的发病率

IF 1.6 Q2 ENTOMOLOGY Psyche: A Journal of Entomology Pub Date : 2017-01-01 DOI:10.1155/2017/3593509
M. Bentz, Eve A. Humphrey, L. Harshman, M. Wayne
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引用次数: 3

摘要

黑腹果蝇的免疫反应是复杂的,包括对寄生虫的特异性和一般反应。在这项研究中,我们通过对垂直传播的西格玛病毒(DMelSV)的感染发生率进行评分,对细菌和病毒的交叉免疫进行了测试。这一杂交的后代是高频率传播DMelSV的雌性和经受三种与蜡样芽孢杆菌抗性相关的选择制度的雄性。尽管结果表明蜡样芽孢杆菌选择菌株的DMelSV感染率较低,但在不同的选择方案中,DMelSV的传播没有显著差异。我们发现病毒感染在后代性别方面存在显著差异,男性感染的可能性始终低于女性。鉴于有限的能量预算,经历过免疫系统挑战的果蝇可能会在其他生活史特征上表现出改变。较晚闭合的后代也比较早闭合的后代更不容易被感染,这表明了与发育时间的关系。最后,在采集时间和后代的性别之间存在显著的相互作用,因此较晚关闭的雄性是最具抵抗力的群体。开发时间的增加有时与能量获取的增加有关;从这个角度来看,增加的开发时间可能与获得足够的资源来进行有效的抵抗有关。
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Sigma Virus (DMelSV) Incidence in Lines of Drosophila melanogaster Selected for Survival following Infection with Bacillus cereus
The immune response of Drosophila melanogaster is complex and involves both specific and general responses to parasites. In this study we tested for cross-immunity for bacteria and viruses by scoring the incidence of infection with the vertically transmitted Sigma virus (DMelSV) in the progeny of a cross between females transmitting DMelSV at high frequencies and males from lines subjected to three selection regimes related to resistance to Bacillus cereus. There was no significant difference in transmission of DMelSV among selection regimes, though results suggest that the B. cereus selected lines had lower rates of infection by DMelSV. We found a significant difference in viral infection with respect to the sex of the progeny, with males consistently less likely to be infected than females. Given a finite energy budget, flies that have experienced immune system challenge may show alterations in other life history traits. Later eclosing progeny were also less likely to be infected than earlier eclosing progeny, indicating a relationship with development time. Finally, there was a significant interaction between the timing of collection and the sex of the progeny, such that later eclosing males were the most resistant group. Increased development time is sometimes associated with increased energy acquisition; from this perspective, increased development time may be associated with acquiring sufficient resources for effective resistance.
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来源期刊
CiteScore
1.80
自引率
0.00%
发文量
8
审稿时长
15 weeks
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