Abstract
Abstract Changes in both cell wall and water-soluble polysaccharide composition during the growth of kiwifruits [Actinidia deliciosa(A. chev.) C. F. Liang and A. R. Ferguson var. deliciosa ‘Hayward’] were investigated. Cellulose was the major wall polysaccharide, with galactose and uronics the main non-cellulosic sugars. Much solubilization of cell wall pectic polysaccharides was detected. While wall-galactose solubilization started 3 months after anthesis, polyuronide degradation did not start until the fifth month, 1 month prior to the harvest date. Parallel to these processes, a linear increase in water-soluble polysaccharides was detected. These mainly comprised galactose-rich polymers in the first 3 months and little-branched polyuronides after the fifth month. Two different mechanisms for galactose and uronic acid solubilization from kiwifruit cell walls during fruit development are proposed.
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