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首页> 外文期刊>Ecological research >Relationships among plant genetics, phytochemistry and herbivory patterns in Quercus castanea across a fragmented landscape
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Relationships among plant genetics, phytochemistry and herbivory patterns in Quercus castanea across a fragmented landscape

机译：破碎景观中栎栎的植物遗传学，植物化学与草食模式之间的关系

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摘要

Herbivorous insects respond to the chemical variation of their host plants which, in turn, usually has a genetic component. Therefore, it is expected that individual host plants with similar genotypes will have similar secondary chemistries and herbivore communities. However, natural or anthropogenic environmental variation can also influence secondary chemistry and herbivore abundance and composition. Here, we determined the relationships among plant genetics, phytochemistry, and herbivory levels by leaf chewers and miners in the red oak Quercus castanea, across a fragmented landscape. Ten oak individuals were sampled at each of four sites in the Cuitzeo basin, central Mexico. Two sites were small and fragmented forest patches and two were large and continuous patches. Individuals were genotyped with six nuclear microsatellites, and analyzed chemically to determine foliar concentrations of water, total nonstructural carbohydrates, and secondary compounds. Damage by leaf chewers was higher in the small fragments than in the large fragments. Mantel tests indicated significant correlations of the genetic distance among individuals with their chemical similitude, and also of chemical similitude with damage levels by leaf miners, but not with damage by folivores. There was no direct relationship between genetic distance and herbivory levels by any of the two insect guilds. Our results suggest that variation in concentration of secondary metabolites in Q. castanea has a genetic component and that plant chemistry acts as an intermediate link between plant genes and the community of associated herbivores. However, this effect was only apparent for herbivory by leaf miners, probably because these insects interact more intimately with the host, while free-living leaf chewers may be more responsive to environmental variation.
机译：草食性昆虫对其寄主植物的化学变异作出反应，而这些植物通常具有遗传成分。因此，预期具有相似基因型的单个寄主植物将具有相似的次级化学和草食动物群落。但是，自然的或人为的环境变化也会影响次级化学以及草食动物的丰度和组成。在这里，我们通过碎片化景观中的赤栎栎栎的叶子咀嚼者和矿工，确定了植物遗传学，植物化学和草食动物水平之间的关系。在墨西哥中部Cuitzeo盆地的四个地点中的每个地点采样了十个橡树个体。两个站点是小的且零散的森林斑块，两个站点是大而连续的斑块。用六个核微卫星对个体进行基因分型，并进行化学分析，以确定水，总非结构性碳水化合物和次要化合物的叶面浓度。小碎片的叶咀嚼物造成的损害高于大碎片。壁炉架测试表明个体之间的遗传距离与其化学相似性之间的显着相关性，以及与化学相似性与矿工的危害程度之间的显着相关性，但与叶肉的危害之间却没有显着相关性。两个昆虫行会的任何一个在遗传距离和食草水平之间没有直接关系。我们的结果表明，Q。castanea中次生代谢产物浓度的变化具有遗传成分，并且植物化学作用是植物基因与相关草食动物群落之间的中间联系。但是，这种作用仅对食叶植物的食草者很明显，这可能是因为这些昆虫与宿主之间的相互作用更紧密，而自由生活的叶片咀嚼物可能对环境变化更敏感。

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  • 来源
    《Ecological research》 |2015年第1期|133-143|共11页
  • 作者

    Yurixhi Maldonado-Lopez; Pablo Cuevas-Reyes; Antonio Gonzalez-Rodriguez; Griselda Perez-Lopez; Carlos Acosta-Gomez; Ken Oyama;

  • 作者单位

    Centro de Investigaciones en Ecosistemas, Universidad Nacional Autonoma de Mexico, Antigua Carretera a Patzcuaro No. 8701, Col. Ex-Hacienda de San Jose de la Huerta, Morelia 58190 Michoacan, Mexico;

    Laboratorio de Ecologia de Interacciones Bioticas, Facultad de Biologia, Universidad Michoacana de San Nicolas de Hidalgo, Ciudad Universitaria, Morelia 58030 Michoacan, Mexico;

    Centro de Investigaciones en Ecosistemas, Universidad Nacional Autonoma de Mexico, Antigua Carretera a Patzcuaro No. 8701, Col. Ex-Hacienda de San Jose de la Huerta, Morelia 58190 Michoacan, Mexico;

    Laboratorio de Ecologia de Interacciones Bioticas, Facultad de Biologia, Universidad Michoacana de San Nicolas de Hidalgo, Ciudad Universitaria, Morelia 58030 Michoacan, Mexico;

    Laboratorio de Ecologia de Interacciones Bioticas, Facultad de Biologia, Universidad Michoacana de San Nicolas de Hidalgo, Ciudad Universitaria, Morelia 58030 Michoacan, Mexico;

    Centro de Investigaciones en Ecosistemas, Universidad Nacional Autonoma de Mexico, Antigua Carretera a Patzcuaro No. 8701, Col. Ex-Hacienda de San Jose de la Huerta, Morelia 58190 Michoacan, Mexico;

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  • 正文语种 eng
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  • 关键词

    Folivores; Leaf miners; Mexico; Microsatellites; Oak;

    机译：叶肉;叶矿工;墨西哥;微卫星;橡木;

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