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Variation in Aluminum Tolerance among Six Genera of Trees

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Using a hydroponic system, the relative aluminum tolerance of 11 tree species was evaluated at 10 levels of Al concentration from 0 to 280 ppm. Species evaluated were Alnus glutinosa, Betula alleghaniensis, B. papyrifera, B. populifolia, Elaeagnus umbellata, Pinus rigida, P. sylvestris, P. virginiana, Populus hybrid clone NE-388, Quercus palustris, and Q. rubra. A comparison of tolerance indices based on root elongation in Al vs. non-Al solutions revealed a wide range of Al tolerance among species. Populus hybrid and E. umbellata were very sensitive to even low Al concentrations (10-40 ppm), while A. glutinosa, Betula spp., Pinus spp., and Quercus spp. were tolerant to much higher concentrations (80-160 ppm). This level of tolerance is greater than that reported for most field crops. Forest Sci. 24:565-568.
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Keywords: Aluminum toxicity; genetics; mine spoil revegetation; mineral nutrition; revegetation; surface mine revegetation

Document Type: Journal Article

Affiliations: Assistant Professor of Forest Resources, School of Forest Resources, The Pennsylvania State University, University Park, PA 16802

Publication date: 01 December 1978

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