Grain aphid clones vary in frost resistance, but this trait is not influenced by facultative endosymbionts

Grain aphid clones vary in frost resistance, but this trait is not influenced by facultative endosymbionts
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谷物蚜虫克隆的抗冻性各不相同,但这一性状不受兼性内共生体的影响

DOI:
10.1111/j.1365-2311.2011.01321.x
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发表时间:
2011
影响因子:
2.2
通讯作者:
LUKASIK P
LUKASIK P
中科院分区:
农林科学3区
文献类型:
--
作者:
LUKASIK P

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1.已知昆虫的兼性内共生细菌影响其宿主的生活史特征,并且在某些环境条件下可以提供重要的适应性益处。虽然已经报道了几种不同的内共生体诱导的效应,但没有数据表明任何物种中的遗传兼性内共生体是否会影响其宿主在低温下的表现,这可能对昆虫的生理和生存产生重大影响,从而影响种群结构和分布。实验从麦长管蚜(Sitobion avenaeFab.)的5个克隆基因型中去除了原来的兼性内共生菌,然后将其暴露在霜冻中。蚜虫基因型在暴露后的存活率和存活者的生殖力方面存在很大差异。然而,兼性共生体的存在对所研究的性状没有总体影响。结果表明,兼性共生菌对寄主的抗寒性影响有限。
1. Facultative endosymbiotic bacteria of insects are known to affect life‐history traits of their hosts, and can provide important fitness benefits under certain environmental conditions. While several distinct endosymbiont‐induced effects have been reported, there is no data on whether heritable facultative endosymbionts in any species affect their hosts' performance at low temperatures, something that could have a major effect on insect physiology and survival, and thus population structure and distribution.2. The original facultative endosymbionts were experimentally removed from five clonal genotypes of the grain aphid,Sitobion avenaeFab., which were then exposed to frost.3. Aphid genotypes differed considerably in survival following the exposure and in fecundity of the survivors. However, the presence of the facultative symbionts had no overall effect on the studied traits.4. The results suggest that the facultative symbionts have limited effects on the cold hardiness of their grain aphid hosts.
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