Do facultative symbionts affect fitness of pea aphids in the sexual generation?
Do facultative symbionts affect fitness of pea aphids in the sexual generation?
复制标题
兼性共生体是否影响有性世代豌豆蚜的适应性？
DOI：
10.1111/eea.12641
复制
发表时间：
2018
影响因子：
1.9
通讯作者：
McLean A
中科院分区：
文献类型：
--
作者：
McLean A
许多蚜虫携带一种或多种兼性共生细菌，这些细菌可以为其宿主提供各种健身益处。它们主要在无性繁殖蚜虫中进行了研究，有性世代的研究仅限于调查传播率和操纵性比的可能性。在无选择实验中研究了两种兼性共生体对豌豆蚜Acyrthosiphon pisumHarris（半翅目：蚜科，长管蚜族）交配成功率的影响。我们比较了蚜虫的适合度与自然感染的昆虫Regiella insecticolaMoran et al.或防御汉米尔顿氏菌Moran et al.与来自基因相同的腌制品系的蚜虫的差异。女性生殖力是不受兼性共生体的存在。然而，与携带H. defensa的雄性交配的雌性比与携带H. defensa的雄性交配的雌性平均更少;在一种情况下，与自然感染的雄性相比，治愈的雌性黑变蛋（未受精或发生早期死亡的蛋）的百分比也更小。此外，在实验过程中，有H. defensas的男性比治愈的男性死亡率更高。四种蚜虫品系也使用了螺旋体感染，这是一种共生体，以前曾报道会导致豌豆蚜虫的雄性死亡。尽管如此，三个螺旋体感染的品系产生了雄性，其中两个数量很高。我们的结论是，删除一个自然的共生体感染可能会有负面的健身效果的雄性蚜虫在一些蚜虫克隆，而来自相同的克隆性女性在很大程度上不受影响。
Many aphids carry one or more facultative symbiotic bacteria which can provide a variety of fitness benefits for their hosts. They have chiefly been investigated in asexually reproducing aphids, with studies of the sexual generation limited to investigation of transmission rates and the potential for sex ratio manipulation. The effects of two facultative symbionts on the mating success of pea aphids,Acyrthosiphon pisumHarris (Hemiptera: Aphididae, Macrosiphini), were investigated in a no‐choice experiment. We compared the fitness of aphids with natural infections of eitherRegiella insecticolaMoran et al. orHamiltonella defensaMoran et al. with that of aphids from genetically identical cured lines. Female fecundity was unaffected by the presence of facultative symbionts. However, females mated to males cured ofH. defensalaid fewer eggs on average than females mated to males carryingH. defensa; in one case the percentage of melanized eggs (eggs that were either not fertilized or in which early death occurred) was also smaller with cured compared to naturally infected males. In addition, males withH. defensasuffered higher mortality during the experiment than cured males. Four of the aphid lines used also hostedSpiroplasmainfections, a symbiont previously reported to cause male‐killing in pea aphids. Despite this, three of theSpiroplasma‐infected lines produced males, two at high numbers. We conclude that removing a natural symbiont infection may have a negative fitness effect on male aphids in some aphid clones, whereas sexual females from the same clones are largely unaffected.
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DOI：
--
发表时间：
2010
期刊：
影响因子：
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作者：
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影响因子：
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作者：
Anbutsu, H;Fukatsu, T
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
Fukatsu, T.