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首页> 外文期刊>International journal of plant sciences >STRONG PHENOTYPIC VARIATION IN FLORAL DESIGN AND DISPLAY TRAITS OF AN ANNUAL TARWEED IN RELATION TO SMALL-SCALE TOPOGRAPHIC HETEROGENEITY IN SEMIAR1D CHILE
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STRONG PHENOTYPIC VARIATION IN FLORAL DESIGN AND DISPLAY TRAITS OF AN ANNUAL TARWEED IN RELATION TO SMALL-SCALE TOPOGRAPHIC HETEROGENEITY IN SEMIAR1D CHILE

机译：与半地形智利小规模地形异质性相关的年度目标花冠设计和显示性状的强表型变化

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摘要

Floral trait expression in wild populations varies in relation to environmental gradients. Variation can be observed among and within plant populations. We investigated the changes in floral phenotype within populations and the probability of plant pollinator visits in relation to small-scale variation in soil moisture and plant cover in a semiarid ecosystem. We measured the variability of floral phenotypes of three wild populations of Madia chilensis along a gradient constituted by three topographic positions (south-facing slope, north-facing slope, and ravine). Changes in soil moisture, plant density, leaf water content, and internode elongation were measured for one population over two study years. Pollinator visit probabilities were also estimated. Floral phenotypes were strongly segregated among topographic positions but less segregated among populations. Plants with the lowest water contents and the smallest or least-conspicuous flower heads grew in the drier north-facing slope, while plants with the highest water contents and showier flower design and display grew in the wetter ravine. Probabilities of pollinator visits were higher on the north-facing slope. Differences in floral phenotypes and probabilities of pollinator visits of M. chilensis were strongly connected to topographic variations at small spatial scale. Topographic heterogeneity at small spatial scale could thus have important consequences for floral trait evolution and pollination ecology.
机译：野生种群的花卉性状表达随环境梯度的变化而变化。可以观察到植物种群之间及其内部的差异。我们调查了半干旱生态系统中种群内花卉表型的变化以及植物传粉者访视的概率与土壤水分和植物覆盖率的小规模变化有关。我们沿着由三个地形位置（南坡，北坡和沟壑）构成的梯度测量了三个Madia chilensis野生种群的花卉表型的变异性。在两个研究年中，测量了一个种群的土壤水分，植物密度，叶片含水量和节间伸长率的变化。还估计了传粉者的访视概率。花卉表型在地形位置之间强烈隔离，但在种群之间隔离较少。含水量最低，花头最小或最不显眼的植物生长在较干燥的朝北坡地上，而含水量最高，花型设计和展示更艳丽的植物生长在较湿的山沟上。朝北的传粉者访问的概率较高。智利分枝杆菌的花卉表型和授粉者探访概率的差异与小空间尺度的地形变化密切相关。因此，小空间尺度上的地形异质性可能对花卉性状演变和授粉生态产生重要影响。

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  • 来源
    《International journal of plant sciences》 |2011年第8期|p.1012-1025|共14页
  • 作者

    Lorena H. Suarez; Fernanda Perez; Juan J. Armesto;

  • 作者单位

    Laboratorio de Ecologfa Evolutiva de Plantas, Departamento de Ecologfa, Facultad de Ciencias Biologicas, Pontificia Universidad Catolica de Chile, Santiago, Chile,Instituto de Ecologfa y Biodiversidad, Facultad de Ciencias, Universidad de Chile, Santiago,Chile;

    Laboratorio de Ecologfa Evolutiva de Plantas, Departamento de Ecologfa, Facultad de Ciencias Biologicas, Pontificia Universidad Catolica de Chile, Santiago, Chile,Instituto de Ecologfa y Biodiversidad, Facultad de Ciencias, Universidad de Chile, Santiago,Chile,Center of Advanced Studies in Ecology and Biodiversity (CASEB), Departamento de Ecologfa, Facultad de Ciencias Biologicas, Pontificia Universidad Catolica de Chile, Alameda 340, Santiago, Chile;

    Instituto de Ecologfa y Biodiversidad, Facultad de Ciencias, Universidad de Chile, Santiago,Chile,Center of Advanced Studies in Ecology and Biodiversity (CASEB), Departamento de Ecologfa, Facultad de Ciencias Biologicas, Pontificia Universidad Catolica de Chile, Alameda 340, Santiago, Chile;

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  • 正文语种 eng
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  • 关键词

    madia chilensis; asteraceae; mediterranean ecosystems; floral traits variation; small-scale heterogeneity; drought;

    机译：智利马迪亚菊科地中海生态系统;花性状变异;小规模异质性干旱;
  • 入库时间 2022-08-18 03:45:40

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