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首页> 外文期刊>Journal of Nematology, with Annual of Applied Nematology >The life cycle of the Antarctic nematode Plectus murrayi under laboratory conditions.
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The life cycle of the Antarctic nematode Plectus murrayi under laboratory conditions.

机译：在实验室条件下，南极线虫Plectus murrayi的生命周期。

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摘要

We study and describe the life cycle of Plectus murrayi, a free-living, bacterivorous soil nematode endemic to terrestrial Antarctica. The study was performed at 15 degrees C, a temperature identified as optimal for growth rate studies in the laboratory. Under these conditions, we observed that the first molt occurs in the egg, and second-stage juveniles hatch 12 to 14 d after egg laying. Individuals undergo three subsequent molts to become adults 23 to 26 d after hatching with a final average length of 950 mm. Egglaying begins 41 to 43 d after hatching, resulting in an egg-to-egg life cycle ranging from 53 to 57 d under our experimental conditions. Considering that the average soil temperature during austral summers in the McMurdo Dry Valleys is only a few degrees above freezing, it is highly likely that many, if not most of these animals, require more than 1 yr to complete their entire life cycle. Our study supports other research that establishes P. murrayi as an important model organism for studying adaptation to extreme environmental stress.
机译：我们研究并描述了Plectus murrayi的生命周期，Plectus murrayi是陆生南极洲特有的自由生活，细菌性土壤线虫。该研究在15摄氏度下进行，该温度确定为实验室中生长速率研究的最佳温度。在这些条件下，我们观察到第一次蜕皮发生在卵中，第二阶段的幼虫在产卵后的12到14 d孵化。个体在孵化后23至26 d经历三个随后的蜕皮成虫，最终平均长度为950 mm。孵化后41到43 d开始产蛋，在我们的实验条件下，卵到蛋的生命周期为53到57 d。考虑到麦克默多干旱谷南部夏季的平均土壤温度仅比冰冻温度高出几度，因此，即使不是大多数这类动物，也很可能需要超过1年的时间才能完成其整个生命周期。我们的研究支持其他将P. murrayi确立为研究对极端环境压力的适应性的重要模式生物的研究。

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