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Detection of Functional Intraclonal Aspen Root Connections by Tracers and Excavation

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Root suckering of both Populus tremuloides Michx. and P. grandidentata Michx. commonly produces clones of genetically identical stems, joined, to some extent, through the parent root system. Excavation of roots revealed parent root connections among P. grandidentata stems up to 50 years old. A number of dead stumps with live root systems, joined to living trees through the parent roots, existed on these exposed anastomotic networks. A tracer injected into donor stems in 119 P. grandidentata clones in 4 stands of varying ages allowed discovery of the root connections between the donor and any receptor stems. There were 105 receptor trees distributed among 71 aspen clones injected with eosin bluish dye, 48 receptors among 24 clones injected with sodium arsenite, and 17 among 24 clones injected with radioactive Rb86. Tracers indicated that P. grandidentata clones of sucker origin consist of a number of interconnected stem groups. The parent root connections among healthy trees apparently do not decay. Tracer transport implied that transport of materials probably occurs among stems under natural conditions.
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Document Type: Journal Article

Affiliations: Research Forester, Intermountain Forest and Range Expt. Sta., Forest Service, U.S. Dept. Agric., Reno, Nevada

Publication date: 1964-12-01

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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