Notes: Lateral-Root Development and Spread of Pisolithus tinctorius Ectomycorrhizae on Bare-Root and Container-Grown Loblolly Pine Seedlings after Planting
Bare-root and container-grown loblolly pine (Pinus taeda) seedlings with Pisolithus tinctorius (Pt) ectomycorrhizae were planted in microplots containing forest soil. During a 22-week period after planting, seedlings were excavated at 4-week intervals to determine the pattern of lateral root egress and rate of development of Pt ectomycorrhizae on egressed laterals. The pattern for lateral root growth from original root systems differed between bare-root and container-grown seedlings. Bare-root seedlings produced 60 percent more laterals and had significantly more horizontal lateral root egress from the B (middle) horizontal zone of the original root system than container-grown seedlings. Bare-root seedlings also had significantly more Pt ectomycorrhizae on egressed laterals and these mycorrhizae were found at significantly greater distances from the original root system than those on container-grown seedlings after 22 weeks. The implications of these results on field performance of seedlings are discussed. Forest Sci. 31:220-225.
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Document Type: Miscellaneous
Affiliations: Principal Plant Pathologist, USDA Forest Service, Institute for Mycorrhizal Research and Development, Forestry Sciences Laboratory, Athens, GA
Publication date: 1985-03-01
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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