Incorporation of dietary fibre-rich oyster mushroom (Pleurotus sajor-caju) powder improves postprandial glycaemic response by interfering with starch granule structure and starch digestibility of biscuit

Sze, Han Ng and Sathyasurya, Sathyasurya Daniel Robert and Ahmad, Wan Amir Nizam Wan and Rosli, W. I. Wan (2017) Incorporation of dietary fibre-rich oyster mushroom (Pleurotus sajor-caju) powder improves postprandial glycaemic response by interfering with starch granule structure and starch digestibility of biscuit. Food Chemistry. pp. 358-368. ISSN 0308-8146

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Abstract

The purpose of this study was to determine the effects of Pleurotus sajor-caju (PSC) powder addition at 0, 4, 8 and 12% levels on the nutritional values, pasting properties, thermal characteristics, microstructure, in vitro starch digestibility, in vivo glycaemic index (GI) and sensorial properties of biscuits. Elevated incorporation levels of PSC powder increased the dietary fibre (DF) content and reduced the pasting viscosities and starch gelatinisation enthalpy value of biscuits. The addition of DF-rich PSC powder also interfered with the integrity of the starch granules by reducing the sizes and inducing the uneven spherical shapes of the starch granules, which, in turn, resulted in reduced starch susceptibility to digestive enzymes. The restriction starch hydrolysis rate markedly reduced the GI of biscuits. The incorporation of 8% PSC powder in biscuits (GI = 49) could be an effective way of developing a nutritious and low-GI biscuit without jeopardizing its desirable sensorial properties.

Item Type: Article
Uncontrolled Keywords: Pleurotus sajor saju Nutritional values Microstructure Starch digestibility Glycaemic index Sensory acceptability
Subjects: R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
T Technology > TP Chemical Technology > TP368-456 Food processing and manufacture
Divisions: Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Kesihatan (School of Health Sciences) > Article
Zoom Profil Pakar (Expert Profile) > Wan Rosli Wan Ishak (Health Sciences)
Depositing User: Administrator Automasi
Date Deposited: 07 Apr 2017 09:45
Last Modified: 09 Feb 2018 06:41
URI: http://eprints.usm.my/id/eprint/32979

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