Effect of Removal of Garlic Mustard (Alliaria petiolata, Brassicaeae) on Arbuscular Mycorrhizal Fungi Inoculum Potential in Forest Soils

作者：Roger C. Anderson, Maggie Anderson, Jonathan T. Bauer, Mitchell Slater, Jamie Herold, Patrice Baumhardt, Victoria A. Borowicz · 发表于：The Open Ecology Journal · 年份：2010 · DOI：10.2174/1874213001003010041 · 被引用次数：33 · 研究领域：Mycorrhizal Fungi and Plant Interactions、Ecology and Vegetation Dynamics Studies、Plant Parasitism and Resistance

Garlic mustard (Alliaria petiolata), a biennial species, is considered to be among the most troublesome of the invasive plants in the Eastern Deciduous forest of North America. It has been shown to prevent or reduce mycorrhizal colonization of native herbaceous ground layer plants and trees in these forests. It is estimated that 70-90% or more of herbaceous native ground layer plant species form associations with arbuscular mycorrhizal fungi (AMF). Loss of the mycorrhizal association can reduce growth, reproductive success, and competitiveness of plant species. Using a corn root bioassay, we examined the effect of garlic mustard removal on the soil AMF mycorrhizal inoculum potential (MIP), in control plots and plots that had second-year garlic mustard removed annually for the past five years (2005)(2006)(2007)(2008)(2009). Removal treatment plots had significantly (P = 0.0240, df = 28) greater MIP than control plots (25.722.26% and 18.292.04%, respectively). MIP was negatively correlated with cover of garlic mustard (r 2 = 0.1325, P < 0.05, df = 30), which accounted for 13.2% of the variation in MIP. Cover of native vegetation in removal treatment plots (104.502.6%) was greater than that of the control plots (95.143.66%), (P = 0.0236, df = 115). These results show that removal of garlic mustard results in an increase in soil MIP and cover of native species; however, there is not a complete loss of MIP associated with garlic mustard invasion. Following removal of garlic mustar...