Interference between bacterial feeding nematodes and amoebae relies on innate and inducible mutual toxicity

Interference between bacterial feeding nematodes and amoebae relies on innate and inducible mutual toxicity
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细菌摄食线虫和变形虫之间的干扰依赖于先天性和诱导性互毒

DOI:
10.1111/j.1365-2435.2010.01718.x
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发表时间:
2010
期刊:
影响因子:
5.2
通讯作者:
S. Scheu
S. Scheu
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
N. Neidig;A. Jousset;F. Nunes;M. Bonkowski;R. J. Paul;S. Scheu

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1.原生动物和线虫是土壤中重要的微型动物捕食者,它们争夺相同的食物资源——细菌。因此,抑制竞争者可能会增强个体捕食者物种的食物获取和适应性。2.我们在无细菌的限生系统中研究了线虫秀丽隐杆线虫和阿米巴阿米巴阿米巴之间的化学干扰。3.阿米巴的外产物表现出明显的抑制线虫活性,并驱除蠕虫。然而,线虫能够降低蛋白酶和糖苷酶的活性,这两种酶在A的毒性中发挥着重要作用。卡斯特拉尼。线虫的胞外产物也通过减少生长和增加包囊而对变形虫产生不利影响。4.结果表明,原生动物和线虫可以相互抑制,并且线虫也能够抵抗原生竞争者的攻击。因此,非营养相互作用似乎是影响土壤中捕食者群落结构的新因素。
1.Protozoa and nematodes are important microfauna predators in soil and compete for the same food resource, bacteria. Therefore, inhibition of competitors may enhance food acquisition and fitness of individual predator species.2.We investigated chemical based interference between the nematodeCaenorhabditis elegansand the amoebaAcanthamoeba castellaniiin a bacteria‐free gnotobiotic system.3.Exoproducts of amoebae exhibited marked nematostatic activity, and repelled the worms. However, nematodes were able to reduce the activity of proteases and glycosidases, two enzymes playing an important role in the toxicity ofA. castellanii. Exoproducts of nematodes also detrimentally affected amoebae by reducing growth and increasing encystation.4.The results indicate that both protozoa and nematodes can inhibit each other, and that nematodes are also able to counteract the attack by protist competitors. Non‐trophic interactions appear thus as a new factor affecting the structure of predator communities in soil.
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