Inoculation of Containerized Douglas-fir with the Ectomycorrhizal Fungus Cenococcum geophilum
Containerized Douglas-fir (Pseudotsuga menziesii) was inoculated with vegetative peat-vermiculite inoculum of three isolates of Cenococcum geophilum (A-145, A-161, A-166) at time of seeding (pre-emergence), and after 1, 2, and 3 mo (postemergence). For all isolates, postemergence inoculation resulted in more mycorrhizae after 6 mo than did pre-emergence inoculation. Percent of short roots with mycorrhizae resulting from pre-emergence inoculation appeared to be correlated with mycelial growth rate of C. geophilum isolates in vitro: A-145 (48 percent) Δ A-161 (24 percent) Δ A-166 (6 percent). Pre-emergence inoculation success with C. geophilum may be partly a function of the growth rate of the fungus in vitro as well as the availibility of lateral short roots for mycorrhizal fungus colonization. Forest Sci. 27:27-31.
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Document Type: Journal Article
Affiliations: Department of Plant Pathology, USDA-SEA-AR Ornamental Plants Research Laboratory, Corvallis, OR 97330
Publication date: 1981-03-01
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