Natural variation in developmental life-history traits of the bacterium Myxococcus xanthus.
Natural variation in developmental life-history traits of the bacterium Myxococcus xanthus.
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DOI：
10.1111/j.1574-6941.2010.00888.x
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发表时间：
2010-08
影响因子：
4.2
通讯作者：
Velicer GJ
中科院分区：
文献类型：
--
作者：
Kraemer SA;Toups MA;Velicer GJ
土壤细菌黄色粘球菌是研究合作微生物行为，如社会运动和子实体形成的模型。几个经常被实验室菌株量化的黄花莲发育性状很可能是自然种群适合度的重要组成部分，但人们对这些性状在野外的差异程度知之甚少，因此可能受到自然选择的影响。在这里，我们测试了几个关键的黄花根结线虫的发育生活史特征是否在来自全球遥远来源的品系之间以及从共域的厘米规模的种群中存在显著差异。研究发现，这些菌株在发育聚集率以及产孢率和产孢率方面都有很大的差异，这是一种可遗传的方式。各菌株在触发孢子形成的营养浓度阈值和孢子的耐热性方面也存在差异。这里记录的发育表型的广泛多样性打开了关于选择和遗传漂移在形成与这些发育特征相关的当地土壤种群多样性方面的相对作用的问题。这也提出了一个问题，野外的适合性在很大程度上是由独立于社会背景表达的特征决定的，还是由仅在遗传异质的社会群体中表达的行为决定的。
The soil bacterium Myxococcus xanthus is a model for the study of cooperative microbial behaviours such as social motility and fruiting body formation. Several M. xanthus developmental traits that are frequently quantified for laboratory strains are likely to be significant components of fitness in natural populations, yet little is known about the degree such traits vary in the wild and may therefore be subject to natural selection. Here we have tested whether several key M. xanthus developmental life-history traits have diverged significantly among strains both from globally distant origins and from within a sympatric, cm-scale population. The isolates examined here were found to vary greatly, in a heritable manner, in their rate of developmental aggregation and in both their rate and efficiency of spore production. Isolates also varied in the nutrient concentration threshold triggering spore formation and in the heat resistance of spores. The extensive diversity in developmental phenotypes documented here opens questions regarding the relative roles of selection and genetic drift in shaping the diversity of local soil populations with respect to these developmental traits. It also raises the question whether fitness in the wild is largely determined by traits that are expressed independently of social context or by behaviors that are expressed only in genetically heterogeneous social groups.
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影响因子：
9.2
作者：
Buttery, Neil J.;Rozen, Daniel E.;Thompson, Christopher R. L.
通讯作者：
Thompson, Christopher R. L.
影响因子：
10.5
作者：
Harris, BZ;Kaiser, D;Singer, M
通讯作者：
Singer, M
DOI：
10.1038/nrmicro2259
发表时间：
2010-01
期刊：
Nature reviews. Microbiology
影响因子：
--
作者：
通讯作者：
--
影响因子：
56.9
作者：
Huelsenbeck, JP;Rannala, B
通讯作者：
Rannala, B
DOI：
10.1073/pnas.76.11.5952
发表时间：
1979-01-01
影响因子：
11.1
作者：
KAISER, D
通讯作者：
KAISER, D