The beetle gut: a hyperdiverse source of novel yeasts.
The beetle gut: a hyperdiverse source of novel yeasts.
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DOI：
10.1017/s0953756205002388
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发表时间：
2005-03
影响因子：
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通讯作者：
S. Suh;J. McHugh;D. Pollock;M. Blackwell
中科院分区：
文献类型：
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作者：
S. Suh;J. McHugh;D. Pollock;M. Blackwell
我们分离出超过650酵母菌在三年内从肠道的各种甲虫和其特征的基础上的LSU rDNA序列和形态和代谢特征。其中，至少有200种是未描述的分类群，相当于目前所有公认的酵母物种的近30%。对物种发现率的贝叶斯分析预测，对先前取样的栖息地进行进一步取样，很容易再发现100个物种。因此，据估计，取样生境中的物种比目前全世界已知的物种多一半以上。甲虫肠道酵母出现在45个独立的谱系中，分散在酵母系统发育树中，通常成簇。分布表明，一些酵母多样化的水平传播的过程中的栖息地和随后的专业化与昆虫宿主。专业化的证据来自于某些酵母和甲虫物种随着时间的推移和广泛的地理范围的一致关联。在以前未探索的栖息地发现高酵母多样性是研究相互作用及其对生态和进化影响的基础的第一步。
We isolated over 650 yeasts over a three year period from the gut of a variety of beetles and characterized them on the basis of LSU rDNA sequences and morphological and metabolic traits. Of these, at least 200 were undescribed taxa, a number equivalent to almost 30% of all currently recognized yeast species. A Bayesian analysis of species discovery rates predicts further sampling of previously sampled habitats could easily produce another 100 species. The sampled habitat is, thereby, estimated to contain well over half as many more species as are currently known worldwide. The beetle gut yeasts occur in 45 independent lineages scattered across the yeast phylogenetic tree, often in clusters. The distribution suggests that the some of the yeasts diversified by a process of horizontal transmission in the habitats and subsequent specialization in association with insect hosts. Evidence of specialization comes from consistent associations over time and broad geographical ranges of certain yeast and beetle species. The discovery of high yeast diversity in a previously unexplored habitat is a first step toward investigating the basis of the interactions and their impact in relation to ecology and evolution.