银叶杜鹃和繁花杜鹃根部真菌的多样性

Diversity of fungi associated with Rhododendron argyrophyllum and R.floribundum hair roots in Sichuan,China

植物根系与真菌形成菌根,在自然生态系统的物质能量循环中具有重要的生态功能。作者在四川省的中国杜鹃园选取银叶杜鹃(Rhododendron argyrophyllum)和繁花杜鹃(R.floribundum),通过直接扩增杜鹃花根部真菌rDNA-ITS区片段,来揭示该地区杜鹃花属植物根部真菌的多样性。ITS序列分析结果表明:从两种杜鹃的根部共检测到41个真菌分类单元,分别属于子囊菌纲的柔膜菌目(Helotiales)、散囊菌目(Eurotiales)、盘菌目(Pezizales)、假球壳目(Pleosporales)和担子菌纲的蜡壳耳目(Sebacinales)、伞菌目(Agaricales)、Erythrobasidiales、线黑粉菌目(Filobasidiales)。银叶杜鹃和繁花杜鹃根部真菌种类丰富,包括了杜鹃花类菌根真菌、外生菌根真菌和其他类型真菌,其中担子菌纲的蜡壳耳目和子囊菌纲的柔膜菌目占有较大比例。

We investigated the fungal associates of Rhododendron argyrophyllum and R.floribundum in Sichuan Province.A total of 41 fungal taxa were identified from hair roots based on ITS sequence analyses belonging to the following orders：Helotiales,Eurotiales,Pezizales,and Pleosporales in Ascomycetes,Sebacinales and Agaricales,Erythrobasidiales,and Filobasidiales in Basidiomycetes.Fungal diversity was rich,including ericoid mycorrhizal（ERM）,ectomycorrhizal（ECM） and other root-associated fungi.Sebacinales and Helotiales occupied a high proportion of total fungal samples.