The annual Turnover of Resources in Young Olive Trees

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Abstract
Summary Seasonal samples of leaves, stems and roots were collected from cv Ascolano olive trees in their third year of growth from cuttings and analysed for changes in dry weight, component 80% methanol-soluble carbohydrates and polysaccharide resources extracted after hydrolysis with 5% trichloroacetic acid. The main components of 80% methanol extracts were sucrose, glucose, fructose and mannitol. There were times during the winter when fructose could not be detected but it was present in a moderate amount during the summer growing season. Mannitol was always the major component and appeared to function both in translocation and storage. Seasonal fluctuations in relative carbohydrate contents occurred throughout but with least amplitude in the roots. The leaves, most of which persisted for two years or more, showed the highest potential for carbohydrate production and storage.

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