We investigated whether individuals of Silene paradoxa L., grown in serpentine and non-serpentine soils, displayed variation in functional traits and adaptive strategies together with a differentiation of the gene pool. We hypothesised that individuals growing in serpentine sites may be exposed to a higher degree of stress, resulting in measurable differences in leaf traits and adaptive strategies, and as well that the differences in the soil type were associated with a genetic process of differentiation. We analysed a specific set of leaf functional traits of populations of S. paradoxa grown on serpentine and non-serpentine soils. Furthermore, DNA-fingerprinting techniques were used to further dissect the emergence of genetic processes of differentiation linked to the different soil types. We detected a relevant intraspecific trait variation in S. paradoxa, with the populations from serpentine sites significantly polarised towards the stress-tolerant adaptive strategy. This polarisation came with a shift in gene pool selection, even if we did not detect quantitative differences in the genetic diversity or evidence of genetic drift. The results indicate that particular edaphic conditions acted on the selection of some regions of the species’ genome, independently of the site, with various portions of the genome being exclusive to or prevalent in the serpentine or non-serpentine populations.

中文翻译：

---

Silene paradoxa L. 蛇纹石和非蛇纹石种群适应策略中的种内性状变异和遗传多样性。

我们调查了在蛇纹石和非蛇纹石土壤中生长的 Silene paradoxa L. 个体是否表现出功能性状和适应性策略的变化以及基因库的分化。我们假设在蛇纹石场地生长的个体可能会受到更高程度的压力，导致叶片性状和适应性策略的可测量差异，以及土壤类型的差异与分化的遗传过程有关。我们分析了在蛇纹石和非蛇纹石土壤上生长的 S. paradoxa 种群的一组特定的叶功能性状。此外，DNA 指纹技术被用于进一步剖析与不同土壤类型相关的分化遗传过程的出现。我们在 S. 中检测到相关的种内性状变异。悖论，来自蛇纹石遗址的种群显着偏向于耐压适应策略。这种两极分化伴随着基因库选择的转变，即使我们没有检测到遗传多样性的数量差异或遗传漂变的证据。结果表明，特定的土壤条件作用于物种基因组的某些区域的选择，独立于该位点，基因组的各个部分在蛇纹石或非蛇纹石种群中是独有的或普遍存在的。