Arbuscular mycorrhizal distribution in relation to microsites on recent volcanic substrates of Mt. Koma, Hokkaido, Japan
Arbuscular mycorrhizal distribution in relation to microsites on recent volcanic substrates of Mt. Koma, Hokkaido, Japan
复制标题
日本北海道科马山近期火山基质上的丛枝菌根分布与微位点的关系
作者：
J. Titus;S. Tsuyuzaki
抽象的。真菌病发生在大多数陆地生态系统中，对了解群落结构和功能至关重要。然而，它们在初级演替中的作用却知之甚少。本研究探讨了菌根定植的6种植物在最近的火山基质上的山顶上的微网站类型。日本，北海道，科马。6种微立地类型分别为平地、细沟、近岩、苔草草丛、蓼丛和柳丛。尖蕊苔草为非菌根植物，而剪股颖和毛果风铃草为丛枝菌根植物。剪股颖AM定殖水平没有不同的微型网站。近岩石风铃草根含有显着更多的菌丝比在单位和蓼补丁microsites，和细沟和苔草草丛风铃草比蓼补丁丛枝。在苔草草丛、蓼草丛和岩石附近生长的盆蕊草属植物中，发现盆蕊草属植物为丛枝型真菌营养型，AM定殖于其根部。外生菌根是外生菌根。位于细沟、蓼属和柳属斑块中的蓼属比位于苔草属斑块中的蓼属更容易被定殖。沙柳外生菌根严重。
Abstract. Mycorrhizae occur in most terrestrial ecosystems and are crucial to understanding community structure and function. However, their role in primary succession is poorly understood. This study examined the mycorrhizal colonization of six plant species in relation to microsite types on recent volcanic substrates on the summit of Mt. Koma, Hokkaido, Japan. The six microsites were flat, rill, near rock, Carex tussock, Polygonum patch and Salix patch. Carex oxyandra was nonmycorrhizal and Agrostis scabra and Campanula lasiocarpa were arbuscular mycorrhizal (AM) at all microsites examined. Agrostis AM colonization levels did not differ across microsites. Near rock Campanula roots contained significantly more hyphae than at flat and Polygonum patch microsites, and rill and Carex tussock Campanula more arbuscules than at Polygonum patches. Penstemon frutescens was found to be facultatively mycotrophic with AM colonization occurring in roots of Penstemon growing in Carex tussocks, Polygonum patches and near rocks. Polygonum weyrichii was found to be ectomycorrhizal. Polygonum located in rills and in Polygonum and Salix patches were more colonized than Polygonum in Carex patches. Salix reinii was heavily ectomycorrhizal.