入侵蚂蚁原生地和引进地的不同病毒载量和免疫反应

IF 4.6 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Antoine Felden, James W. Baty, David G. Chapple, Monica A. M. Gruber, John Haywood, Carolina Paris, Andrew V. Suarez, Neil D. Tsutsui, Philip J. Lester
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引用次数: 0

摘要

目的病原体可在生物入侵中发挥重要作用。由于遗传多样性低和种群密度大等因素,外来种群可能特别容易受到病原体的影响。然而,躲过自然病原体的引入种群可能会重新分配资源,使其从免疫转向生长和繁殖。有趣的是,有研究表明,引进的蚂蚁对新病原体的耐受力增强,这也是它们作为引进物种取得成功的原因之一。在这项研究中,我们旨在调查引入的阿根廷蚂蚁种群与本地种群相比是否携带不同的病毒载量,以及这些差异是否与免疫相关的基因表达有关。方法我们使用 RT-qPCR 来量化蚂蚁体内的病毒载量和基因表达。结果我们发现,与我们筛选的其他病毒相比,LhuPcV1、LhuPiLV1、LhuCV1、克什米尔蜜蜂病毒和 LHUV-1 这五种病毒在阿根廷蚂蚁体内的载量较高。我们发现病毒感染范围对病毒感染有明显影响:高病毒载量通常出现在来自引进种群的蚂蚁身上,这些种群的免疫基因表达量也有所增加。我们发现病毒载量与免疫基因和代谢基因的表达之间存在高度相关性。主要结论我们的研究结果表明,与本地种群相比,引入的阿根廷蚂蚁种群寄生着不同的病毒群落,这些差异与免疫相关基因表达的变化有关。这项研究强调了病原体在生物入侵中的复杂作用,以及在评估引进物种的影响时考虑生态免疫因素的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Variable viral loads and immune response in an invasive ant's native and introduced ranges

Variable viral loads and immune response in an invasive ant's native and introduced ranges

Aim

Pathogens can play an important role in biological invasions. Introduced populations may be particularly vulnerable to pathogens due to factors such as low genetic diversity and high population density. However, introduced populations that escape their natural pathogens may reallocate resources away from immunity and towards growth and reproduction. Interestingly, introduced ants have been suggested to have increased tolerance to new pathogens, contributing to their success as introduced species. In this study, we aimed to investigate whether introduced Argentine ant populations harbour different viral loads compared to native populations and if these differences were related to immunity-related gene expression.

Location

The study was conducted across the native range of Argentine ants in Argentina and four introduced regions in California, France, Australia and New Zealand.

Methods

We used RT-qPCR to quantify viral loads and gene expression in the ants. We analysed 15 different potentially pathogenic viruses across the Argentine ant's native and introduced ranges.

Results

We found that five viruses, LhuPcV1, LhuPiLV1, LhuCV1, Kashmir Bee virus and LHUV-1, presented high loads in Argentine ants compared to the other viruses we screened. We found a significant effect of range on viral infections: high viral loads were commonly found in ants from introduced populations, which also exhibited increased immune gene expression. We found highly significant correlations between viral loads and expression of immune and metabolic genes. However, these associations were not fully consistent across the studied regions, indicating the complexity of eco-immunological phenomena.

Main Conclusions

Our results suggest that introduced Argentine ant populations host different viral communities compared to native populations and that these differences are correlated with changes in immunity-related gene expression. The study highlights the complex role of pathogens in biological invasions and the importance of considering eco-immunological factors when assessing the impact of introduced species.

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来源期刊
Diversity and Distributions
Diversity and Distributions 环境科学-生态学
CiteScore
8.90
自引率
4.30%
发文量
195
审稿时长
8-16 weeks
期刊介绍: Diversity and Distributions is a journal of conservation biogeography. We publish papers that deal with the application of biogeographical principles, theories, and analyses (being those concerned with the distributional dynamics of taxa and assemblages) to problems concerning the conservation of biodiversity. We no longer consider papers the sole aim of which is to describe or analyze patterns of biodiversity or to elucidate processes that generate biodiversity.
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