Who is Oxyrrhis marina? Morphological and phylogenetic studies on an unusual dinoflagellate
Who is Oxyrrhis marina? Morphological and phylogenetic studies on an unusual dinoflagellate
复制标题
DOI：
10.1093/plankt/fbq110
复制
发表时间：
2011-04-01
影响因子：
2.1
通讯作者：
Montagnes, David J. S.
中科院分区：
文献类型：
--
作者：
Lowe, Chris D.;Keeling, Patrick J.;Montagnes, David J. S.
海洋尖锥虫是一种被广泛研究的形态种，也是一种常见的原生生物模式，用于研究一系列生态过程。此外，由于一些不寻常的细胞学和遗传学特征，Oxyrrhis越来越多地成为研究Alveolata内进化模式和基因组组织的目标。然而，少量的早期形态学研究和最近的系统发育数据表明，O。玛丽娜代表了不止一个物种。由于不同的研究小组采用不同的O。由于海洋分离株（可能是高度不同的菌株或不同的物种）的差异，很难评估分离株之间进行比较的背景。在本文中，我们探讨了文献，有助于定义O。marina，突出了O.这激发了对这种生物的大量研究，并告知其关键的系统发育位置。此外，我们评估了历史和当代的证据多Oxyrrhis物种。基于这一评估，特别是最近的分子遗传学数据，我们断言O。marina代表两个种：O. marina和O. maritima根据历史观察，我们还指出，第三种（O。tenticulifera）可能发生，尽管没有当代数据支持或反驳这一说法。广泛的隐蔽多样性对研究Oxyrrhis的研究人员具有重要意义：在描述Oxyrrhis分离株进行实验研究时必须谨慎（即不适合报告关于特征不佳的分离株的评估），并且需要对多个分离株进行比较研究以评估属中的个体，种群和物种水平的变化。最后，在更广泛的背景下，驱动自由生活原生生物多样性的生态和进化过程仍然知之甚少。模式原生生物如O. marina和O.我们正在开始认识和描述一个广泛的变异池的海洋，这为解开这些基本过程提供了理想的机会。
Oxyrrhis marina is an extensively studied morphospecies and a common protist model used to examine a range of ecological processes. Further, as a result of a number of unusual cytological and genetic features, Oxyrrhis is increasingly a target for the study of evolutionary patterns and genome organization within the Alveolata. However, a small number of early morphological studies and recent phylogenetic data suggest that O. marina represents more than one species. As different research groups employ different O. marina isolates (which are potentially highly divergent strains or different species), the context in which comparisons between isolates can be made is difficult to assess. In this paper, we explore the literature that has contributed to the definition of O. marina, highlighting the unusual characteristics possessed by O. marina that have motivated much of the study on this organism and informed its key phylogenetic position. In addition, we assess historical and contemporary evidence for multiple Oxyrrhis species. Based on this assessment, in particular recent molecular genetic data, we assert that O. marina represents two species: O. marina and O. maritima. Based on historical observations, we also indicate that a third species (O. tenticulifera) may occur, although there are no contemporary data to support or refute this designation. Extensive cryptic diversity has important implications for researchers studying Oxyrrhis: caution must be exercised in characterizing Oxyrrhis isolates for experimental study (i.e. it is inappropriate to report assessments concerning poorly characterized isolates), and comparative studies of multiple isolates are required to assess individual, population and species level variation in the genus. Finally, in a broader context, the ecological and evolutionary processes driving diversity in free-living protists remains poorly understood. Model protists such as O. marina and O. maritima for which we are beginning to recognize and characterize an extensive pool of variation present ideal opportunities to unravel these fundamental processes.