Local Expansion of a Panmictic Lineage of Water Bloom-Forming Cyanobacterium Microcystis aeruginosa
Local Expansion of a Panmictic Lineage of Water Bloom-Forming Cyanobacterium Microcystis aeruginosa
复制标题
水华形成蓝藻铜绿微囊藻的泛繁殖谱系的局部扩张
作者：
Yuuhiko Tanabe;M. Watanabe
在以前的研究中，我们已经证明了形成水华的铜绿微囊藻的种群结构是克隆的。对412株铜绿假单胞菌的扩展多位点序列分型分析发现，5个种内谱系被认为是泛游动的，同时保持了整体的克隆结构，这可能是由于谱系之间的重组率降低所致。有趣的是，自2005年以来，属于这些泛游动集群之一(G组)的大多数菌株都是在日本的一个特定地区(柏浦湖流域)发现的。在这个地区，这种血统的多种相似但不同的基因类型在开花期间占主导地位，这种模式在铜绿假单胞菌中是前所未有的。与这种血统相关的水华的种群结构类似于病原体的流行。我们的结果可能揭示了可能的适应谱系在局部水环境中的扩展，为我们提供了一个独特的机会来研究其生态和生物地理后果。
In previous studies, we have demonstrated that the population structure of the bloom-forming cyanobacterium Microcystis aeruginosa is clonal. Expanded multilocus sequence typing analysis of M. aeruginosa using 412 isolates identified five intraspecific lineages suggested to be panmictic while maintaining overall clonal structure probably due to a reduced recombination rate between lineages. Interestingly, since 2005 most strains belonging to one of these panmictic clusters (group G) have been found in a particular locality (Lake Kasumigaura Basin) in Japan. In this locality, multiple, similar but distinct genotypes of this lineage predominated in the bloom, a pattern that is unprecedented for M. aeruginosa. The population structure underlying blooms associated with this lineage is comparable to epidemics of pathogens. Our results may reveal an expansion of the possible adaptive lineage in a localized aquatic environment, providing us with a unique opportunity to investigate its ecological and biogeographical consequences.
DOI：
10.1073/pnas.98.1.182
发表时间：
2001-01-02
影响因子：
11.1
作者：
Feil, EJ;Holmes, EC;Spratt, BG
通讯作者：
Spratt, BG