Abstract

The dietary fibre in the fruits of 12 genotypes of Japanese quince (Chaenomeles japonica) and 1 genotype of flowering quince (Chaenomeles speciosa) were prepared using two different methods: the alcohol insoluble solid (AIS) preparation; and the Association of Official Analytical Chemists (AOAC) method for total as well as for soluble and insoluble fibre. The two methods resulted in similar but significantly different estimates. No interaction was revealed between the methods and the genotypes studied. For content of total dietary fibre, three main groups could be distinguished a group containing a low amount of fibre (three genotypes, 28-30 g/100 g dry matter), a group containing a medium amount of fibre (nine genotypes, 30-36g/100g dry matter) and an isolated genotype (Chaenomeles speciosa) that contained a considerable amount of fibre (38g/100g dry matter;). The amount and the nature of monomeric sugars in the constitutive polysaccharides of the fibres were determined after total hydrolysis of the AIS or the total dietary fibre (TDF). The fibre contained mostly pectic and cellullosic polysaccharides. Analysis of the fibre from different parts of the fruits of two genotypes showed that they differed in their proportion of constituent polysaccharides (cellulose, hemicelluloses and pectic polysaccharides). (C) 2000 Academic Press.

Keywords

Chaenomeles; Japanese quince; dietary fibre; alcohol insoluble solid; cell-wall polysaccharides

Published in

Food Science and Technology
2000, Volume: 33, number: 2, pages: 124-131
Publisher: ACADEMIC PRESS LTD

SLU Authors

• Rumpunen, Kimmo

  • Department of Horticultural Plant Breeding, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Horticulture
Food Science


Publication identifier

DOI: https://doi.org/10.1006/fstl.1999.0628

Permanent link to this page (URI)

https://res.slu.se/id/publ/43599