Seasonal changes in water-soluble carbohydrates of Populus tremuloides leaves

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Abstract
Leaf leaching was simulated by washing leaves in distilled water. A variation in the quality and quantity of aspen poplar leaf leachate carbohydrates with respect to season and height in the tree canopy was observed. Some carbohydrates were subject to less variation than others. Fructose was the major component of the leachate carbohydrate at all sampling times. Other carbohydrates occurring in the leachate included glucose, galactose, inositol, sucrose, maltose, raffinose, an unknown 12-C, and an unknown 18-C carbohydrate. The possibility that restricted availability of total and (or) particular carbohydrates may play a role in controlling microbial development on leaf surfaces is discussed.

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