INVESTIGADORES
PONCE Nora Marta Andrea
artículos
Título:
Compositional Changes in Cell Wall Polysaccharides from Japanese Plum (Prunus salicina Lindl.) during Growth and On-Tree Ripening
Autor/es:
NORA M. A. PONCE; VICTOR H. ZIEGLER; CARLOS A. STORTZ; GABRIEL SOZZI
Revista:
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Editorial:
AMER CHEMICAL SOC
Referencias:
Lugar: Washington; Año: 2010 vol. 58 p. 2562 - 2570
ISSN:
0021-8561
Resumen:
Climacteric Japanese plums were harvested at six developmental stages with no intermediatestorage period, and cell wall compositional changes were analyzed. Arabinose proved to be theprincipal neutral monosaccharide constituent in cell walls during growth and the most dynamicneutral sugar in pectic fractions. Arabinose loss from tightly bound pectins was found to be arelatively early feature in the sequence of cell wall biochemical modifications, thus suggesting asoftening-related role during Japanese plum on-tree ripening. Depolymerization of matrix glycansstarted at the end of the cell expansion phase and increased throughout ripening. Pectinsolubilization was first detected during early ripening. Firmness loss did not correlate withpolyuronide depolymerization early in ripening, but the last softening phase was associated with astrong depolymerization of cell wall polyuronides as well as a decrease in the arabinose/galactoseratio in loosely bound pectins. This is the first work that characterizes the temporal sequence of cellwall polysaccharide changes in Japanese plum.