Differences in endophyte communities of introduced trees depend on the phylogenetic relatedness of the receiving forest

Plant species sometimes perform extraordinarily well when introduced to new environments, through achieving higher growth rates, individual biomasses or higher densities in their receiving communities compared to their native range communities. One hypothesis proposed to explain enhanced performance in species’ new environments is that their soil microbial communities may be different and provide greater benefit than microbial communities encountered in species’ native environments. However, detailed descriptions of soil biota associated with species in both their native and introduced environments remain scarce. We established a global network of sites in regions where the tree species Pinus contorta has been introduced (Chile, New Zealand, Finland, Scotland and Sweden), as well as native range sites where the introduced populations originated (Canada and USA). We conducted pyrosequencing analysis to compare the root fungal endophyte communities associated with P. contorta in its nati...植物物种在被引入新环境后有时会展现出格外优异的生长表现：相较于其原生分布区的群落，在入侵地群落中它们可获得更高的生长速率、个体生物量或种群密度。有研究提出一种假说，用以解释物种在新环境中的生长优势：其土壤微生物群落可能与原生环境中的同类群落存在差异，且能提供比原生环境微生物群落更为显著的益处。然而，目前针对物种在原生与入侵环境中关联的土壤生物群的详细研究描述仍较为匮乏。 我们构建了一套全球样地网络：涵盖扭叶松（Pinus contorta）的入侵分布区域（智利、新西兰、芬兰、苏格兰与瑞典），以及该物种引入种群的原生分布区样地（加拿大与美国）。我们采用焦磷酸测序（pyrosequencing）技术开展分析，以对比扭叶松在其原生[原文此处截断]环境中关联的根系真菌内生菌（root fungal endophyte）群落……