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The Relationship Between Lateral-Root Development and Spread of Pisolithus tinctorius Ectomycorrhizae After Planting of Container-Grown Loblolly Pine Seedlings

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Container-grown loblolly pine (Pinus taeda L.) seedlings with Pisolithus ectomycorrhizae were planted in microplots containing fumigated or nonfumigated forest soil. At 4-week intervals during a 20-week period after planting, seedlings were excavated to determine the pattern of lateral root egress and spread of Pisolithus ectomycorrhizae on laterals. Between 75 and 80 percent of the laterals egressed from the bottom of the plugs in both fumigated and nonfumigated soil. Hyphal strands of Pisolithus spread from the plugs and developed ectomycorrhizae at greater distances from the plugs on lateral roots of seedlings in fumigated soil than on seedlings in nonfumigated soil. The results indicated that root configuration of container-grown loblolly seedlings initially influences lateral root egress (first 20 weeks) after planting. Soil microbial associates, i.e., native symbionts and pathogenic fungi, of the more vertically egressed roots in nonfumigated soil apparently do not favor development of Pisolithus ectomycorrhizae. Forest Sci. 29:519-526.
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Keywords: Pinus taeda; root configuration

Document Type: Journal Article

Affiliations: Research Plant Pathologist, Institute for Mycorrhizal Research and Development, USDA Forest Service, Forestry Sciences Laboratory, Southeastern Forest Experiment Station, Athens, Georgia 30602

Publication date: 1983-09-01

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    Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

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    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
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