Abstract
We examined the below-ground mycorrhizal diversity of P. pinea seedlings inoculated with S. collinitus six years after out- planting in a disturbed site, located at La Petite-Camargue (Gard, France). This was performed using the polymerase chain reaction (PCR), the restriction fragment length polymorphism (RFLP) and the sequencing of the nuclear ribosomal internal transcribed spacer (ITS). Seven and one plants corresponding, respectively, to inoculated and non-inoculated (control) treatments were chosen randomly. Examinations were carried out directly from ectomycorrhizae. A total number of 233 root tips was examined. Five ITS RFLP taxa were detected. The ITS taxon I corresponded to the ectomycorrhizal species Rhizopogon rubescens. This fungus was abundant (55%) in the P. pinea ectomycorrhizal community. The other ITS taxa were rare and remained unidentified. The current P. pinea plantation showed a restricted diversity of the ectomycorrhizal community which is typical of ectomycorrhizal communities in young plantations established in disturbed stands.
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