美国各地克鲁维毕赤酵母杀伤表型的地理分布与遗传学研究
Geographic distribution and genetics of killer phenotypes for the yeast Pichia kluyveri across the United States.
作者信息
Starmer W T, Ganter P F, Aberdeen V
机构信息
Department of Biology, Syracuse University, New York 13244-1270.
出版信息
Appl Environ Microbiol. 1992 Mar;58(3):990-7. doi: 10.1128/aem.58.3.990-997.1992.
Representative strains (n = 61) of the yeast Pichia kluyveri from across the United States were studied for their ability to kill 71 other strains (representing 25 species) of yeast. This survey showed killing activity in 69% of the P. kluyveri strains tested. More extensive analysis of killer activity of 197 P. kluyveri strains against strains of five tester species showed comparable activity (67% of strains tested). This activity was shown to be equally variable within localities, within regions, and across the continent. The genetic basis of the variability was ascertained by tetrad analysis and is most likely due to alleles segregating at three epistatic loci. Evidence for the idea that killer toxins have a role in excluding other yeasts from particular habitats is discussed.
对来自美国各地的61株克鲁维毕赤酵母代表性菌株进行了研究，以考察它们杀死其他71株酵母菌株（代表25个物种）的能力。这项调查显示，在所测试的克鲁维毕赤酵母菌株中，69%具有杀伤活性。对197株克鲁维毕赤酵母菌株针对五个测试物种菌株的杀伤活性进行的更广泛分析显示，具有相当的活性（所测试菌株的67%）。结果表明，这种活性在不同地点、不同区域以及整个大陆范围内都同样存在差异。通过四分体分析确定了这种变异性的遗传基础，很可能是由于三个上位基因座上等位基因的分离。文中还讨论了杀伤毒素在将其他酵母排除在特定生境之外方面发挥作用这一观点的证据。
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