||Synthesis of Ectomycorrhizae on Northern Red Oak Seedlings in a Michigan Nursery.
Dixon, R. K. ;
Johnson, P. S. ;
||Corvallis Environmental Research Lab., OR.;Charles K. Blandin Foundation, Grand Rapids, MN.;North Central Forest Experiment Station, St. Paul, MN.;Minnesota Agricultural Experiment Station, St. Paul.
Oak trees ;
Size determination ;
Suillus luteus ;
Ectomicorrhizal fungus ;
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Vegetative inoculum of the ectomycorrhizal fungus Suillus luteus was thoroughly mixed into fumigated nursery soil, and northern red oak seedlings of four families were evaluated one and two years after sowing for ectomycorrhizal development, growth, and nutrition. At the end of year one, treated seedlings were successfully inoculated with S. luteus, but the percentage varied significantly with family. Suillus luteus persisted on lateral roots two years following sowing. Two of four seedling families inoculated with S. luteus were significantly larger in size than control plants. These results suggest that the fungal symbiont S. luteus can be successfully introduced into nurseries and that early ectomycorrhizal development improves the growth of northern red oak seedlings.