Carbohydrate dynamics in roots,stems, and branches after maintenance pruning in two common urban tree species of North America |
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| Institution: | 1. Center for Forest Research, Université du Québec à Montréal, P.O. Box 8888, Succursale Centre-ville, Montréal, QC, H3C 3P8, Canada;2. Facultad de Ciencias Agrarias, Universidad del Cauca, Calle 5 N° 4-70, Popayán, Colombia;3. Programa de Biología, Facultad de Ciencias Naturales y Matemáticas, Universidad del Rosario, Carrera 24 No. 63C-69, Bogotá, Colombia;4. Institute of Temperate Forest Sciences (ISFORT), University of Quebec in Outaouais (UQO), 58 Rue Principale, Ripon, QC, J0 V 1V0, Canada;1. Plant Health and Natural Products Lab, Key Lab of Urban Agriculture (South), Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China;2. Institut de Recherche pour le Développement, UMR 186 IRD-Cirad-UM2 Résistance des Plantes aux Bioagresseurs, 911 avenue Agropolis, BP 64501, 34394 Montpellier Cedex 5, France;1. Forest and Wood Technology Research Centre (CETEMAS), Pumarabule, Carbayín, s/n, 33936 Siero, Asturias, Spain;2. Sustainable Forest Management Unit (UXFS), Agroforestry Engineering Department, High Polytechnic School, University of Santiago de Compostela, Campus Universitario s/n, 27002 Lugo, Spain;1. Department of Biological Sciences, Centre for Forest Research (CEF) and NSERC/Hydro-Québec Chair on Tree Growth Control, Université du Québec à Montréal, Centre-Ville Station, P.O. Box 8888, Montreal, Qc H3C 3P8, Canada;2. Department of Natural Resources, Institute of Temperate Forest Sciences and Centre for Forest Research (CEF), Université du Québec en Outaouais, 58 Rue Principale, Ripon, Qc J0V 1V0, Canada;1. Forest Research Institute, Université du Québec en Abitibi-Témiscamingue, boul. de l’Université, Rouyn-Noranda, Canada;2. Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Center, succ. Sainte Foy, Québec, Canada;3. Facultad de Ciencias Agrarias, Universidad del Cauca, Popayán, Colombia;4. Centre for Forest Research, Université du Québec à Montréal, Montréal, Québec, Canada;1. Department of Horticulture and Crop Science, California Polytechnic State University, San Luis Obispo, CA 93405, USA;2. Department of Biology, California Polytechnic State University, San Luis Obispo, CA 93405, USA;1. Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan, 250100, China;2. College of Life Sciences, Shandong Normal University, Jinan, 250014, China;3. College of Agronomy, Hebei Agricultural University, Baoding, 071000, China |
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| Abstract: | The ability of plants to tolerate stress is determined in part by the carbon allocated to their reserves. We studied two common urban tree species in northeastern North America, Acer saccharinum (Silver maple, native) and Acer platanoides (Norway maple, exotic), to assess the dynamics of non-structural carbohydrate (NSC) concentrations immediately following a maintenance pruning of 30% of the tree crown. NSC concentrations were measured by high-performance liquid chromatography in branches, main stems, and root tissues for both pruned and un-pruned trees at three intervals during the growing season. NSC concentrations in tree organs of A. platanoides were 75% higher than in A. saccharinum. Maintenance pruning did not have any significant depletion effect on carbohydrate concentrations in the tissues of either species. Yet, there was a significant increase in the NSC concentrations in un-pruned branches of pruned trees of A. platanoides at the end of the growing season, but no effect was observed in A. saccharinum. Higher levels of carbohydrates after pruning in woody plant tissues suggested that A. platanoides may have compensatory mechanisms that allow this species to respond better to maintenance pruning than A. saccharinum. |
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| Keywords: | Compensatory mechanisms Native/exotic urban trees Non-structural carbohydrates Urban stresses |
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