Glucuronoarabinoxylans from bamboo shoots and the oligosaccharides obtained from them by enzymatic treatment, with potential application as prebiotics

ZELAYA, VICTOR MARTÍN; FERNADEZ, PAULA VIRGINIA; CIANCIA, MARINA

Simposio; XVI Latin-American Polymer Symposium; 2018

Woody bamboos comprise 1641 species, some of them utilized for their edible and palatable shoots, the new culms that arise from the rhizomes. Besides, shoot fiber is a common ingredient in many food products in some countries, but they are not used in Argentina. Previous studies suggested that xylo-oligosaccharides (XOS) can be applied as prebiotics, as they selectively enhance the growth of bacteria from human colon exhibiting beneficial health effects. Moreover, it was found that the most effective fraction of XOS contains short chains with DP=2?5, but presence of uronic acid residues can have a negative effect on their digestibility. XOS can resist heat up to 100 °C and they are stable at pH 2.5?8.0, In addition, they are moderately sweet compounds with no off-taste, and no cariogenic effect. XOS can be applied in foods and beverages1. Recently, the major hemicellulose fraction from shoots of Phyllostachys aurea was studied2, and now we present the chemical characteristics of those from Guadua chacoensis. Besides, experiments carried out to obtain oligosaccharide fractions through treatment of these polysaccharides with inexpensive enzyme mixtures (Driselase) gave products, which were separated using different GPC phases and analyzed.