Van Der Heijden Marcel G A, Wiemken Andres, Sanders Ian R
Botanical Institute, University of Basel, Hebelstrasse 1, CH-4056 Basle, Switzerland.
Department of Systems Ecology, Vrije Universiteit, De Boelelaan 1087; NL-1081 HV Amsterdam, The Netherlands. Current Addresses.
New Phytol. 2003 Mar;157(3):569-578. doi: 10.1046/j.1469-8137.2003.00688.x.
• It is often thought that the coexistence of plants and plant diversity is determined by resource heterogeneity of the abiotic environment. However, the presence and heterogeneity of biotic plant resources, such as arbuscular mycorrhizal fungi (AMF), could also affect plant species coexistence. • In this study, Brachypodium pinnatum and Prunella vulgaris were grown together in pots and biotic resource heterogeneity was simulated by inoculating these pots with one of three different AMF taxa, with a mixture of these three taxa, or pots remained uninoculated. • The AMF acted as biotic plant resources since the biomass of plants in pots inoculated with AMF was on average 11.8 times higher than uninoculated pots. The way in which the two plant species coexisted, and the distribution of phosphorus and nitrogen between the plant species, varied strongly depending on which AMF were present. The results showed that the composition of AMF communities determines how plant species coexist and to which plant species nutrients are allocated. • Biotic plant resources such as AMF should therefore be considered as one of the factors that determine how plant species coexist and how soil resources are distributed among co-occurring plant species.
• 人们通常认为，植物的共存及植物多样性是由非生物环境的资源异质性决定的。然而，生物性植物资源的存在及其异质性，如丛枝菌根真菌（AMF），也可能影响植物物种的共存。
• 在本研究中，将羽茅和夏枯草种植于花盆中，并通过给花盆接种三种不同AMF分类群之一、这三种分类群的混合物或不接种来模拟生物资源异质性。
• AMF充当生物性植物资源，因为接种AMF的花盆中植物的生物量平均比未接种的花盆高11.8倍。两种植物物种的共存方式以及植物物种之间磷和氮的分配，很大程度上取决于存在哪些AMF。结果表明，AMF群落的组成决定了植物物种如何共存以及养分分配给哪些植物物种。
• 因此，诸如AMF之类的生物性植物资源应被视为决定植物物种如何共存以及土壤资源如何在共存植物物种之间分配的因素之一。
