The Ecophysiology of Arbuscular Mycorrhizal Fungi: Phosphatase Activity Associated with Extraradical and Intraradical Mycelium

摘要: Arbuscular mycorrhizal (AM) fungi colonise a wide range of plant species and are especially common in soils with relatively high pH, where phosphorus availability is limiting factor for primary production. The aim this thesis was to study the ecophysiology arbuscular when exposed different environments. Development AM their host plants were investigated focus on activity location phosphatases associated fungal extraradical intraradical mycelium. Plants mycelium grown substrates varying soil origin, content, or pH. use Enzyme-Labelled Fluorescence (ELF) phosphatase substrate research investigated. The studies have led following findings. ELF method sensitive determination acid alkaline root colonisation positively related biomass mycelium, however, locally production can respond conditions certain patches. I found no active release by fungi, indicating that mineralisation organic P not through phosphatases. Staining more intense than In proportion phosphatase-active seems greater proportion, while it smaller. arbuscules indicate importance metabolism thus transfer plant. A tubular vacuole system present Glomus isolate content growth decreases its motility. Phosphatases seem be uptake some possible roles these discussed.