Peat H J, Fitter A H
Department of Biology, University of York, Heslington, York YO1 5DD.
New Phytol. 1993 Dec;125(4):845-854. doi: 10.1111/j.1469-8137.1993.tb03933.x.
Arbuscular mycorrhizal (AM) associations with higher plants are common in many ecosystems but some plant species are consistently never or rarely infected. These species may differ morphologically or occur in different habitats from species which are usually mycorrhizal. A large data-set on the ecology of British angiasperms was used to test for relationships between the mycorrhizal status of British angiosperms and several morphological and environmental variables (life form, root diameter, seed weight, soil fertility, soil water availability, soil pH and habitat type). No relationship was found between soil fertility or soil water availability and frequency of infection with AM fungi. AM species, however, can grow in habitats with a higher pH than non-mycorrhizal species and perennial AM species occur in a significantly greater number of habitat types than perennial species which are never, or rarely, arbuscular mycorrhizal. Non-mycorrhizal species tend to have thinner roots, smaller seeds and occur mainly in aquatic, wetland and saline habitats.
丛枝菌根（AM）与高等植物的共生关系在许多生态系统中都很常见，但有些植物物种始终不会被感染或很少被感染。这些物种在形态上可能与通常形成菌根的物种不同，或者生长在不同的栖息地。利用一个关于英国被子植物生态学的大型数据集，来测试英国被子植物的菌根状态与几个形态和环境变量（生活型、根直径、种子重量、土壤肥力、土壤水分有效性、土壤pH值和栖息地类型）之间的关系。未发现土壤肥力或土壤水分有效性与AM真菌感染频率之间存在关系。然而，与非菌根物种相比，AM物种能够在pH值较高的栖息地生长，并且多年生AM物种出现的栖息地类型数量显著多于从不或很少形成丛枝菌根的多年生物种。非菌根物种往往根系较细、种子较小，主要生长在水生、湿地和盐碱地栖息地。
