Wolbachia endosymbiont responsible for cytoplasmic incompatibility in a terrestrial crustacean:: effects in natural and foreign hosts
Wolbachia endosymbiont responsible for cytoplasmic incompatibility in a terrestrial crustacean:: effects in natural and foreign hosts
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DOI：
10.1046/j.1365-2540.2001.00831.x
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发表时间：
2001-03-01
期刊：
影响因子：
3.8
通讯作者：
Rigaud, T
中科院分区：
文献类型：
--
作者：
Moret, Y;Juchault, P;Rigaud, T
沃尔巴克氏体细菌是垂直传播的内共生体，干扰许多节肢动物的繁殖，从而促进它们在宿主种群中的传播。沃尔巴克氏体通常是陆生等足类动物性别比例变化的原因，这是基因型雄性雌性化的结果。在这里，我们发现，沃尔巴克氏体主办的Cylisticus convexus（wCc）造成单向细胞质不相容性（CI），在昆虫中常见的效果。为了了解等足类动物中沃尔巴克氏体诱导效应的多样性，将wCc实验转移到新的等足类动物宿主Armadillidium vulgare中。wCc保留了诱导CI的能力。然而，沃尔巴克氏体没有传播到鸡蛋，所以在涉及两个transinfected个体的杂交中恢复兼容性的能力丧失了。由A. vulgare不能挽救wCc诱导的CI。这些结果表明，沃尔巴克氏体在等足类动物中并没有广泛地进化到诱导雌性化，CI和雌性化效应可能是由于不同的机制。此外，wCc降低了受感染的C. convexus男性，这表明细菌可能会改变生殖行为。在主机种群的wCc的维护进行了讨论。
Wolbachia bacteria are vertically transmitted endosymbionts that disturb the reproduction of many arthropods thereby enhancing their spread in host populations. Wolbachia are often responsible for changes of sex ratios in terrestrial isopods, a result of the feminization of genotypic males. Here we found that the Wolbachia hosted by Cylisticus convexus (wCc) caused unidirectional cytoplasmic incompatibility (CI), an effect commonly found in insects. To understand the diversity of Wolbachia-induced effects in isopods, wCc were experimentally transferred in a novel isopod host, Armadillidium vulgare. wCc conserved the ability to induce CI. However, Wolbachia were not transmitted to the eggs, so the capacity to restore the compatibility in crosses involving two transinfected individuals was lost. The feminizing Wolbachia hosted by A. vulgare was unable to rescue CI induced by wCc. These results showed that Wolbachia in isopods did not evolved broadly to induce feminization, and that CI and the feminizing effect are probably due to different mechanisms. In addition, wCc reduces the mating capacity of infected C. convexus males, suggesting that the bacteria might alter reproductive behaviour. The maintenance of wCc in host populations is discussed.