Interspecific transmission of endosymbiotic Spiroplasma by mites
Interspecific transmission of endosymbiotic Spiroplasma by mites
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DOI：
10.1098/rsbl.2006.0577
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发表时间：
2007-02-22
期刊：
影响因子：
3.3
通讯作者：
Minhas, Miranda
中科院分区：
文献类型：
--
作者：
Jaenike, John;Polak, Michal;Minhas, Miranda
在远缘关系较远的昆虫物种中出现了亲缘关系密切的内共生菌菌株，这表明这些感染可以通过侧向转移来定植新的寄主物种，尽管发生这种情况的机制尚不清楚。我们研究了以昆虫血淋巴为食的体外寄生蠕虫是否可以作为果蝇内共生菌--普氏螺旋体的种间载体。用螺旋体特异性引物进行聚合酶链式反应，我们发现螨类可以从感染的星云果蝇雌性体内感染螺旋体，然后将感染转移到果蝇身上。一些受者的后代被感染，这表明螺旋体在新的寄主物种内成功地母性传播。然而，从受体果蝇向其后代传播感染的比率很低，可能是由于受体果蝇中螺旋体密度低所致。
The occurrence of closely related strains of maternally transmitted endosymbionts in distantly related insect species indicates that these infections can colonize new host species by lateral transfer, although the mechanisms by which this occurs are unknown. We investigated whether ectoparasitic mites, which feed on insect haemolymph, can serve as interspecific vectors of Spiroplasma poulsonii, a male-killing endosymbiont of Drosophila. Using Spiroplasmaspecific primers for PCR, we found that mites can pick up Spiroplasma from infected Drosophila nebulosa females and subsequently transfer the infection to Drosophila willistoni. Some of the progeny of the recipient D. willistoni were infected, indicating successful maternal transmission of the Spiroplasma within the new host species. However, the transmission rate of the infection from recipient flies to their offspring was low, perhaps due to low Spiroplasma density in the recipient flies.