Yang Huaiyin, Chen Peng, Chen Lingyun, Warren Alan, Ning Yingzhi
Laboratory of Microbiota, College of Life Sciences, Northwest Normal University, Lanzhou 730070, China.
Department of Life Sciences, Natural History Museum, London SW7 5BD, UK.
Eur J Protistol. 2022 Oct;86:125936. doi: 10.1016/j.ejop.2022.125936. Epub 2022 Oct 19.
The morphology, morphogenesis and molecular phylogeny of the hypotrich ciliate Parentocirrus hortualis, isolated from soil in northwestern China, was studied using live observation and protargol staining. The Chinese population closely matches the German type population although some features such as the number of macronuclear nodules (4-8 vs 5-16) and transverse cirri (4 or 5 vs 2-4) differ considerably. These differences can probably be explained, at least in part, by environmental adaptability. We also compared the ontogenetic processes in the two populations and did not find any significant differences. Phylogenetic analyses based on SSU rDNA gene sequence data showed that Parentocirrus hortualis clusters with Gastrostyla steinii and Parentocirrus sp., which together form a clade with another species of Gastrostyla within the Stylonychinae. These findings suggest that Parentocirrus and Gastrostyla are closely related.
采用活体观察和银染法，对从中国西北土壤中分离出的腹毛目纤毛虫园艺原环虫的形态学、形态发生及分子系统发育进行了研究。中国种群与德国模式种群非常匹配，尽管在一些特征上，如大核结节数量（4 - 8个对5 - 16个）和横棘毛数量（4或5根对2 - 4根）存在相当大的差异。这些差异至少部分可能是由环境适应性造成的。我们还比较了两个种群的个体发育过程，未发现任何显著差异。基于小亚基核糖体DNA（SSU rDNA）基因序列数据的系统发育分析表明，园艺原环虫与施泰因胃柱虫及原环虫属物种聚类在一起，它们共同与柱毛虫亚科内的另一种胃柱虫形成一个分支。这些发现表明原环虫属和胃柱虫属关系密切。
