a b s t r a c t
The storage of Carioca bean at 30 ◦C and 75% relative humidity for eight months altered the solubilization
pattern of hulls non-starch polysaccharides. The polysaccharide physicochemical pattern changed,
resulting in a shift in the composition of water-soluble and water-insoluble polysaccharides caused by the
insolubilization of galacturonans and xyloglucan. Hulls make up 10% of whole beans, which showed an
increase of about 5% in water-insoluble polysaccharides and a decrease of about 1% in water-soluble
polysaccharides with aging. These values suggest that cotyledons and hulls together account for an
increase of about 2 g of water-insoluble polysaccharides and a decrease of 1.5 g of water-soluble polysaccharides
per 100 g of beans. This change in the polysaccharide composition may produce a considerable
difference in the dietary fiber profile. The alterations observed in bean hull non-starch polysaccharide
composition were similar to those previously observed in the cotyledon.