Arbuscular mycorrhizal fungi host preference and site effects in two plant species in a semiarid environment
Arbuscular mycorrhizal fungi host preference and site effects in two plant species in a semiarid environment
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DOI：
10.1016/j.apsoil.2011.04.003
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发表时间：
2011-07-01
影响因子：
4.8
通讯作者：
Pugnaire, Francisco I.
中科院分区：
文献类型：
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作者：
Martinez-Garcia, Laura B.;Pugnaire, Francisco I.
干旱环境的特点是资源（土壤养分和水的供应）分布不均匀，这些资源往往在灌木下或灌木周围积累。这些所谓的“肥沃的岛屿”有高水平的有机质，营养物质和菌根接种物。丛枝菌根真菌（AMF）社区和植物之间的相互作用，以及它们的分布，在这些生态系统中知之甚少，虽然在其他地方的生态系统功能的相关性是众所周知的。在这里，我们的特点是AMF社区殖民根的两种植物，毛叶和Lobularia maritima，生长在补丁和开放的地区。我们发现AMF的遗传组成的社区与两种植物物种之间的差异，表明特异性。同一种植物根系AMF定殖的相似性在开阔地高于斑块，但在开阔地不同目标种间AMF遗传丰富度和多样性存在差异。这些数据提供了新的信息，在斑块环境中的AMF-植物相互作用的特异性，并建议在干旱生态系统中的植物种群和群落动态的AMF控制。(C)2011 Elsevier B. V.保留所有权利。
Arid environments are characterized by a patchy distribution of resources (soil nutrients and water availability) which often accrue under or around shrubs. These so-called 'fertile islands' have high levels of organic matter, nutrients, and mycorrhiza inocula. Interactions between arbuscular mycorrhizal fungi (AMF) communities and plants, as well as their distribution, are poorly known in these ecosystems, although elsewhere their relevance in ecosystem function is well known. Here, we characterized the AMF community colonizing roots of two plant species, Ballota hirsuta and Lobularia maritima, growing in both patches and open areas. We found differences between AMF genetic composition of communities associated with the two plant species, suggesting specificity. The similarity of AMF colonizing roots of the same plant species was higher in open areas than in patches, while there were differences in AMF genetic richness and diversity between target species in open areas. These data provide new information on the specificity of AMF-plant interactions in patchy environments, and suggest a control of AMF on plant population and community dynamics in arid ecosystems. (C) 2011 Elsevier B.V. All rights reserved.