Functional ecology of ecotypic differentiation in the Californian serpentine sunflower (Helianthus exilis).
Functional ecology of ecotypic differentiation in the Californian serpentine sunflower (Helianthus exilis).
复制标题
加州蛇纹向日葵（Helianthus exilis）生态型分化的功能生态学。
DOI：
10.1111/j.1469-8137.2007.02068.x
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
K. Rice
中科院分区：
文献类型：
--
作者：
Julianno B. M. Sambatti;K. Rice
* 在这里，我们研究了来自美国加利福尼亚州北部的蛇纹向日葵 Helianthus exilis 适应当地环境的蛇纹石种群和河岸种群之间的表型差异。 * 在共同环境中，来自蛇纹石和河岸地区的植物生长在普通盆栽土或蛇纹土中。测量生理学、形态学、物候学和健身相关性状。 *总体而言，河岸植物生长得更快，最终尺寸更大，叶子更大，花序更小。与蛇纹植物相比，河岸植物对根系生物量的投入也更少，而且水资源利用效率更高。蛇纹石植物和河岸植物的叶子中硼、镁、钠和钼的浓度也有所不同。 *这些生态型差异表明，应对蛇纹石地区的土壤压力或河岸地区激烈的地上竞争的适应性策略有所不同。在一种适应性特征（平均干重）中存在显着的种群起源与土壤类型交叉相互作用，这反映了先前记录的这些河岸和蛇纹生态类型的局部适应。然而，由于在我们共同的花园研究中，所有其他适应性特征并未表现出这种交叉相互作用，因此，由于生物和非生物相互作用，局部适应的表型差异可能会在田间放大。
* Here, we examined phenotypic differences between locally adapted serpentine and riparian populations of the serpentine sunflower Helianthus exilis from northern California, USA. * Within a common environment, plants from serpentine and riparian sites were grown in regular potting soil or serpentine soil. Physiology, morphology, phenology and fitness-related traits were measured. * Overall, riparian plants grew more rapidly, attained a larger final size, produced larger leaves, and smaller flowering heads. Riparian plants also invested less in root biomass and were more water-use-efficient than the serpentine plants. Serpentine and riparian plants also differed in leaf concentrations of boron, magnesium, sodium and molybdenum. * These ecotypic differences suggest contrasting adaptive strategies to cope with either edaphic stress in serpentine sites or intense above-ground competition at riparian sites. There was a significant population origin x soil type crossing interaction in one fitness trait (average dry weight) that mirrored local adaptation previously documented for these riparian and serpentine ecotypes. However, because all other fitness traits did not exhibit this crossing interaction in our common garden study, it is possible that phenotypic differences underlying local adaptation may be amplified in the field as a result of biotic and abiotic interactions.
影响因子：
9.4
作者：
Karrenberg, S;Edelist, C;Rieseberg, L
通讯作者：
Rieseberg, L