Changes in Cell Wall Composition and Water-soluble Polysaccharides During Kiwifruit Development |
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Authors: | GALLEGO P P; ZARRA I |
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Institution: | Laboratorio de Fisiología Vegetal, Facultad de Biología, Universidad de Santiago, E-15706, Santiago de Compostela, Spain |
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Abstract: | Changes in both cell wall and water-soluble polysaccharide compositionduring 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. Muchsolubilization 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 first3 months and little-branched polyuronides after the fifth month.Two different mechanisms for galactose and uronic acid solubilizationfrom kiwifruit cell walls during fruit development are proposed. Actinidia deliciosa ; cell wall; fruit growth; kiwifruit; water-soluble polysaccharides |
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