A new paper just published on Mycorrhiza, where authors make an screening of all the fungal species living on Douglas-fir (Pseudotsuga menziesii) producing Oregon truffles. This is done using pyrosequencing techniques.
A total of five Tuber species were detected. T. oregonense was the most abundant, followed by T. gibbosum and Wilcoxina mikolae. They found that Tuber species can be dominant ectomycorrhizal symbionts of Douglas-fir.
Map shows soils suitable for Oregon white (blue) and black (red) truffle.
Marcos S. Morcillo
Gian Maria Niccolò Benucci, Charles Lefevre, Gregory Bonito. Characterizing root-associated fungal communities and soils of Douglas-fir (Pseudotsuga menziesii) stands that naturally produce Oregon white truffles (Tuber oregonense and Tuber gibbous).