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Influence of Temperature on Aseptic Synthesis of Ectomycorrhizae by Thelephora terrestris and Pisolithus tinctorius on Loblolly Pine

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Temperature of the substrate significantly affected ectomycorrhizal development and survival and growth of Pinus taeda seedlings in aseptic culture. Isolates of Thelephora terrestris formed ectomycorrhizae on approximately 45 percent of the feeder roots at 14, 19, and 24° C and on 30 percent at 29° C; mycorrhizae were not formed at 34°. Poor survival and growth of these seedlings and noninoculated control seedlings at 34° were related to the absence of ectomycorrhizae. Isolates of Pisolithus tinctorius formed increasingly more ectomycorrhizae as temperatures increased; approximately 80 percent of the feeder roots were ectomycorrhizal at 34°. Ectomycorrhizal development and mycelial growth in pure culture were correlated at different temperatures for isolates of T. terrestris, but not for isolates of P. tinctorius. Mycelial growth in pure culture was maximum at 28° C for P. tinctorius, but ectomycorrhizal development was greatest at 34°. Relative seedling vigor was related to ectomycorrhizal development at all temperatures for T. terrestris. Relative seedling vigor increased with ectomycorrhizal development by P. tinctorius up to 29°, after which seedling vigor declined even though ectomycorrhizal development increased at 34°. Forest Sci. 16:424-431.
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Keywords: Pinus taeda; Tree physiology; fungus physiology

Document Type: Journal Article

Affiliations: Professor, Departments of Soil Science, Forestry, and Plant Pathology, North Carolina State Univ., Raleigh 27607

Publication date: 1970-12-01

More about this publication?
  • 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.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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