Botany, Ahead of Print.
Pale swallow-wort, Vincetoxicum rossicum (Kleopow) Barbar., is an invasive weed in the lower Great Lakes Basin of North America. We investigated the relationship between V. rossicum productivity and several environmental variables across 54 established V. rossicum populations in southern Ontario. Variables included climate measurements, soil characteristics (pH, texture, and nutrient status), habitat type, plant community, and the diversity of root-associated fungi. Vincetoxicum rossicum roots were collected at all 54 sites, and associated fungi were compared using terminal restriction fragment length polymorphism. Aboveground biomass of V. rossicum was measured at 23 sites with similar light regimes, allowing comparison between populations. Results suggested that abiotic soil variables, and habitat type have little effect on V. rossicum productivity. Aboveground biomass production was significantly correlated with precipitation, and the presence of fungal pathogens and dark septate endophytes. Annual precipitation and soil clay content were also positively correlated with the abundance of soil pathogens. Accumulation of these microbes may negatively affect co-occurring native plants and associated fungal partners. The presence of these fungal species in soil could be used as an indicator of site susceptibility to invasion by V. rossicum and assist in the development of management plans for this exotic vine.

中文翻译：

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真菌内生菌增加苍白燕窝（Vincetoxicum rossicum (Kleopow) Barbar）中的生物量产量。

植物学，超前印刷。
淡燕窝，Vincetoxicum rossicum (Kleopow) Barbar.，是北美五大湖盆地下游的一种入侵杂草。我们在安大略省南部 54 个已建立的 V. rossicum 种群中调查了 V. rossicum 生产力与几个环境变量之间的关系。变量包括气候测量、土壤特征（pH、质地和营养状况）、栖息地类型、植物群落和根相关真菌的多样性。在所有 54 个地点收集了 Vincetoxicum rossicum 根，并使用末端限制性片段长度多态性比较相关真菌。在具有相似光照条件的 23 个地点测量了 V. rossicum 的地上生物量，从而可以在种群之间进行比较。结果表明非生物土壤变量和栖息地类型对 V 的影响很小。蔷薇生产力。地上生物量产生与降水、真菌病原体和深色有隔内生菌的存在显着相关。年降水量和土壤粘土含量也与土壤病原体的丰度呈正相关。这些微生物的积累可能会对共生的本地植物和相关的真菌伙伴产生负面影响。土壤中这些真菌物种的存在可用作场地易受 V. rossicum 入侵的指标，并有助于为这种外来葡萄树制定管理计划。这些微生物的积累可能会对共生的本地植物和相关的真菌伙伴产生负面影响。土壤中这些真菌物种的存在可用作场地易受 V. rossicum 入侵的指标，并有助于为这种外来葡萄树制定管理计划。这些微生物的积累可能会对共生的本地植物和相关的真菌伙伴产生负面影响。土壤中这些真菌物种的存在可用作场地易受 V. rossicum 入侵的指标，并有助于为这种外来葡萄树制定管理计划。