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Title
Variation of carbohydrates and lignin in hybrid aspen (Populus tremula x P. tremuloides) on alkaline soil
Authors
Malle Mandre Arvo Tullus Jaan Kloseiko Aljona Lukjanova and Hardi Tullus
Received
January 10, 2011
Published
Volume 45 Issue 5-6 May-June
Keywords
hybrid aspen, cellulose, lignin, hemicellulose, non-structural carbohydrates, carbon, nitrogen,
Abstract
Hybrid aspen plantations established on soils with different pH and chemical composition were studied. At higher pH and Ca, K, Mg and P in the soil of a former arable land, influenced by alkaline dust pollution long before plantation establishment, an inhibition of growth, diameter at breast height, as well as of the annual growth was observed, compared to unpolluted plantations. The differences in hybrid aspen leaves, branches and stems from trees growing under optimal growth conditions and those from polluted areas consisted in higher sucrose, starch, glucose, fructose and hemicelluloses contents, and lower lignin and cellulose contents in the trees from polluted plantations. The relatively high C/N ratio was associated with the lower N concentration and height growth of the trees growing in the polluted area. This finding suggests that, although no differences occurred in the total C concentration among trees from different plantations, an altered partitioning was established between the compartments of trees, as to starch and total soluble carbohydrates.
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