Notes: Effects of Juglone on the Growth of Coniferous Seedlings
Abstract:Seedlings of Larix leptolepis, Picea abies, Pinus strobus, and P. sylvestris were established in a hydroponic system and installed in a growth chamber. The seedlings were grown for 8 to 10 weeks in a nutrient plus juglone solution at juglone concentrations ranging from 10-2 M to 10-10 M in order to determine the effects of juglone on each species. At concentrations of 10-2 M and 10-3 M, juglone was lethal to all species; Scotch pine and Japanese larch were also killed at a concentration of 10-4 M. Juglone caused no visible injury symptoms to white pine at concentrations of 10-6 M and less, and 10-5 M and less for the other species, but seedling growth was inhibited by solutions as dilute as 10-7 M. In contrast, solutions containing minute amounts of juglone apparently promoted seedling growth. For each species, at least one of the measured dry weight values for a treatment in the 10-8 M to 10-10 M juglone range exceeded those for the control plants. Forest Sci. 25:452-454.
Document Type: Miscellaneous
Affiliations: Principal Research Forester, U. S. Forest Service, Washington, D.C. 20250
Publication date: September 1, 1979
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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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