期刊
CARBOHYDRATE POLYMERS
卷 130, 期 -, 页码 155-165出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.04.055
关键词
Chayote fruits; Chayote roots; Sechium edule Sw.; Carbohydrate; Cell wall; Starch; Linkage analysis
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [process CNPq 478100/2010]
Chayote is a multipurpose table vegetable widely consumed in Latin America countries. Chayote fruits, leaves and tuberous roots contain complex carbohydrates as dietary fiber and starch, vitamins and minerals. The complex polysaccharides (cell walls and starch) were analyzed in the black and green varieties of chayote fruits as well as in green chayote tuberous root before and after a controlled cooking process to assess changes in their composition and structure. The monosaccharide composition and linkage analysis indicated pectins homogalacturonans and rhamnogalacturonan I backbones constitute about 15-20% of the wall mass, but are heavily substituted with, up to 60% neutral arabinans, galactans, arabino-galactans. The remainder is composed of xyloglucan, glucomannans and galactoglucomannans. Chayote cell-wall polysaccharides are highly stable under normal cooking conditions, as confirmed by the optical microscopy of wall structure. We found also that tuberous roots constitute a valuable additional source of quality starch and fiber. Published by Elsevier Ltd.
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