The role of glutamine synthetase, glutamate synthase and glutamate dehydrogenase in ammonia assimilation by the mycorrhizal fungus Pisolithus tinctorius J. L. Kershaw and G. R. StewartAnn. For. Sci., 46 Supplement (1989) 706s-710sDOI: https://doi.org/10.1051/forest:198905ART0155