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Notes: The Impact of Chronic Cadmium Exposure on Growth of Pin Oak Seedlings

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Abstract:

Two-year-old pin oak (Quercus palustris Muenchh.) seedlings were grown in sand culture and given complete nutrient solution with or without 0.1 g/ml Cd (as CdCl2) for one or two growing seasons from May to September and the effect on growth determined. Cadmium accumulated primarily in the roots of the seedlings during chronic exposure but was translocated slowly into the shoot over time. Growth of newly planted two-year-old seedlings was stimulated after one year of Cd treatment, but that of established three-year-old seedlings was not affected. The more frequent application of Cd and the larger root system of the older seedlings resulted in a greater Cd accumulation in the root than that associated with growth stimulation. No measurable effect of Cd on tree growth was detected after two successive years of cadmium treatment; however, the percentage of trees exhibiting foliar toxicity symptoms increased. Where Cd treatment was terminated after one year and the trees replanted in uncontaminated sand, leaves continued to show high levels of Cd due to translocation from perennial tissue, but this response was not reflected in any growth change. Forest Sci. 32:1061-1066.

Keywords: Quercus palustris; chlorophyll; heavy metal; iron

Document Type: Miscellaneous

Affiliations: Professor, Department of Plant Pathology, Cook College, New Jersey Agricultural Experiment Station, Rutgers University, New Brunswick, NJ 08903

Publication date: December 1, 1986

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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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