Analysis of Nutritional Components and Physicochemical Properties of Different Parts of Sargassum fusiforme
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Abstract:
In this study, Sargassum fusiforme was used as the research object, the basic nutrient components, amino acid composition and physicochemical properties of the stem, branches, pneumatocyst, and reproductive receptacles of Sargassum fusiforme were analyzed, in order to explore whether there are differences in the physical and chemical properties of different parts of Sargassum fusiforme. The nutritional value of protein and the correlation between physical and chemical properties were also evaluated. The results showed that compared with other parts, the protein, lipid, and carbohydrate contents in the reproductive receptacle were higher (i.e. 15.64 g/100 g, 5.77 g/100 g, and 50.03 g/100 g, respectively); the crude fiber and ash contents in the lateral branches were higher (i.e. 10.27 g/100 g and 26.86 g/100 g, respectively). The content of each nutrient in the pneumatocyst was at an intermediate level. Totally 17 kinds of amino acids were detected in each part, with essential amino acids accounting for about 40% of the total amino acids (indicating the abundance of essential amino acids). The amino acid composition of the branches and stems was more balanced, with the highest essential amino acid index (EAAI) reaching 96.73. The pneumatocyst and reproductive receptacle had an EAAI of 89.31. In terms of physicochemical properties, the lateral branches had the strongest water holding capacity (11.96 g/g), and the pneumatocyst had the strongest oil holding capability (1.98 g/g). The protein, crude fiber and lipid contents were significantly correlated (p<0.05) with the physicochemical properties of Sargassum fusiforme. In summary, there were differences in the physicochemical properties of different parts of S. fusiforme. The results can provide basic data for expanding domestic S. fusiforme markets and utilizing selectively the different parts of S. fusiforme.
