Abstract
β-glucan was isolated from eight Indian oat cultivars (OL-9, OL-10, Kent, OS-6, OS-7, OS-346, HFO-114, and PLP-1) and characterized for its composition, functional, rheological, morphological, and x-ray diffraction properties. The isolated β-glucans had ash and protein contents of 1.10%–2.60% and 3.1%–4.7%, respectively. Among various minerals studied, magnesium and cobalt were found in higher concentrations. Water-binding and foaming capacities of β-glucans ranged between 2.15–5.00 g/g and 20%–48%, respectively. The properties examined were found to be cultivar-dependent. Among all cultivars, OL-10 cv. β-glucan was significantly (p < 0.05) different in exhibiting the highest moisture, ash, protein, lightness, bulk density, and foam stability. Scanning electron micrographs revealed the porous and spongy appearance of β-glucans with an irregular particle shape. The rheological measurements of β-glucan suspensions from all cultivars indicated their shear thinning and viscoelastic behavior. Practical applications Oat β-glucan has numerous health benefits along with desirable functional properties to be used as an ingredient in food industry. A comparative study of various compositional, functional, structural, and rheological properties of β-glucan isolated from different oat cultivars will help in selection of a cultivar suitable for imparting desirable characteristics to various food products.
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