A shared coevolutionary history does not alter the outcome of coalescence in experimental populations of Pseudomonas fluorescens.
A shared coevolutionary history does not alter the outcome of coalescence in experimental populations of Pseudomonas fluorescens.
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DOI：
10.1111/jeb.13394
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发表时间：
2019-01
影响因子：
2.1
通讯作者：
Padfield D
中科院分区：
文献类型：
--
作者：
Castledine M;Buckling A;Padfield D
群落聚结，即多个群落的混合，在天然微生物群落中普遍存在。在合并过程中，理论表明，一个种群的成功将通过与它共同进化的物种（相对于外来物种）的存在而得到加强，因为共同进化将导致更大的资源专业化，以最大限度地减少竞争。因此，更多的共同进化的社区应占主导地位，在合并事件的共同进化社区。我们使用细菌荧光假单胞菌来测试这些假设，荧光假单胞菌可以分化为共存的生态位-专业形态型。我们首先进化重复种群约40代，然后分离进化的基因型。在一系列的竞争试验中，我们确定是否使用共同进化与随机基因型影响的相对性能的“社区”的单一和多个基因型。我们发现，无论是基因型健身或社区的表现，这表明社区之间的平行（共同）进化的共同进化的历史没有影响。然而，由于存在相同菌株类型的其他基因型（野生型或具有LacZ标记的同基因菌株;在竞争期间需要包括后者以区分基因型），适应性得到增强，这表明遗传背景方面的局部适应。我们的研究结果是第一次调查（共）进化的效果，合并的结果，并建议当输入人口功能相似，并添加在相等的混合比，结果社区可能不会不对称地由任何输入人口占主导地位。
Community coalescence, the mixing of multiple communities, is ubiquitous in natural microbial communities. During coalescence, theory suggests the success of a population will be enhanced by the presence of species it has coevolved with (relative to foreign species), because coevolution will result in greater resource specialization to minimize competition. Thus, more coevolved communities should dominate over less coevolved communities during coalescence events. We test these hypotheses using the bacterium Pseudomonas fluorescens which diversifies into coexisting niche‐specialist morphotypes. We first evolved replicate populations for ~40 generations and then isolated evolved genotypes. In a series of competition trials, we determined if using coevolved versus random genotypes affected the relative performance of “communities” of single and multiple genotypes. We found no effect of coevolutionary history on either genotype fitness or community performance, which suggests parallel (co)evolution between communities. However, fitness was enhanced by the presence of other genotypes of the same strain type (wild‐type or an isogenic strain with a LacZ marker; the inclusion of the latter necessary to distinguish genotypes during competition), indicative of local adaptation with respect to genetic background. Our results are the first to investigate the effect of (co)evolution on the outcome of coalescence and suggest that when input populations are functionally similar and added at equal mixing ratios, the outcome community may not be asymmetrically dominated by either input population.
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影响因子：
4.2
作者：
Devevey G;Dang T;Graves CJ;Murray S;Brisson D
通讯作者：
Brisson D
影响因子：
12.3
作者：
Lloyd-Price J;Abu-Ali G;Huttenhower C
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Huttenhower C
影响因子：
2.9
作者：
LENSKI, RE;ROSE, MR;TADLER, SC
通讯作者：
TADLER, SC
影响因子：
56.9
作者：
Grant, Peter R.;Grant, B. Rosemary
通讯作者：
Grant, B. Rosemary
影响因子：
3.2
作者：
Grman, Emily;Suding, Katharine N.
通讯作者：
Suding, Katharine N.