Enzymes of ammonium metabolism in ectendomycorrhizal and ectomycorrhizal symbionts of pine [glutamate synthase, Paxillus incolutus, MrgX 1, Amanita muscaria, Suillus bovinus, Suillus luteus, Rhizopogon luteolus]

absorption de substances nutritives amanita ammonia ammoniac azote champignon crecimiento croissance culture techniques enzymic activity especies fungi glutamate dehydrogenase growth hongos micelio mycelium mycorrhizae nitrogen nutrient uptake paxillus pinus sylvestris pisolithus tinctorius rhizopogon species suillus technique de culture