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Photosynthetic and biomass allocation responses of Liquidambar styraciflua (Hamamelidaceae) to vine competition



Photosynthetic and biomass allocation responses of Liquidambar styraciflua (Hamamelidaceae) to vine competition



American Journal of Botany 82(4): 454-461



This 2-year field study examined stomatal conductance, photosynthesis, and biomass allocation of Liquidambar styraciflua saplings in response to below-and aboveground competition with the vines Lonicera japonica and Parthenocissus quinquefolia. Vine competition did not affect stomatal conductance of the host trees. The leaf photosynthetic capacity and photosynthetic nitrogen-use efficiency were significantly reduced by root competition with vines, either singly or in combination with aboveground competition, early in the second growing season. However, such differences disappeared by the end of the second growing season. Trees competing below ground with vines also had lower allocation to leaves compared with stems. Aboveground competition with vines resulted in reduced photosynthetic capacity per unit leaf area, but not per unit leaf weight, in trees. No correlation was found between single leaf photosynthetic capacity and tree growth. In contrast, a high positive correlation existed between allocation to leaves and diameter growth. Results from this study suggest that allocation patterns are more affected than leaf photo synthesis in trees competing with vines. Reprinted by permission of the publisher.

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Accession: 002671129

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DOI: 10.2307/2445691



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