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首页> 外文期刊>Evolutionary Ecology Research >Local adaptation to serpentine and non-serpentine soils in Collinsia sparsiflora.
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Local adaptation to serpentine and non-serpentine soils in Collinsia sparsiflora.

机译：在Collinsia sparsiflora中对蛇纹石和非蛇纹石土壤的局部适应。

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Question: Are populations of a native California annual plant locally adapted to serpentine and non-serpentine soils? Study species: Collinsia sparsiflora (Scrophulariaceae s.l.), which grows both on and off serpentine soils. Field sites: We studied six populations at the McLaughlin University of California Natural Reserve, in the North Coast Range of California. All sites were within 1 km of each other, but were notably variable for a number of soil characters, including concentrations of calcium and magnesium, key factors in serpentine soils. Methods: We conducted reciprocal transplant experiments in 2002 and 2003. The 2002 experiment involved four study populations, two serpentine and two non-serpentine. In 2003, an additional population on each soil type was included in a second reciprocal transplant study. Seeds generated in greenhouse crosses were planted reciprocally into each population, providing replication within the soil types. Results: Both experiments demonstrated the presence of significant reciprocal adaptation to soil type. We also observed variation in phenology between transplants on the two soil types. We conclude that plants from these six populations represent two distinct, soil-specific ecotypes, raising questions about the relative role of selection and gene flow in promoting genetic differentiation in these contrasting environments..
机译：问题：加利福尼亚本地一年生植物的种群是否在当地适应蛇纹石和非蛇纹石土壤？研究物种：分布在蛇纹石土壤上或外的蛇纹石科（Scrophulariaceae s.l.）。实地考察：我们在加利福尼亚州北海岸山脉的加利福尼亚麦克劳林大学自然保护区研究了六个种群。所有站点之间的距离都在1 km之内，但是对于许多土壤特征而言变化很大，包括钙和镁的浓度（蛇形土壤中的关键因素）。方法：我们分别在2002年和2003年进行了相互移植实验。2002年的实验涉及四个研究人群，两个蛇纹石和两个非蛇纹石。 2003年，第二种相互移植研究包括了每种土壤类型的额外种群。大棚杂交中产生的种子被相互种植到每个种群中，从而在土壤类型中复制。结果：两个实验均表明存在对土壤类型的显着倒数适应。我们还观察到两种土壤类型上的移植之间的物候变化。我们得出的结论是，这六个种群中的植物代表两种不同的土壤特定生态型，这引发了有关选择和基因流在促进这些不同环境中的遗传分化中的相对作用的问题。

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