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KMID : 0380620180500030260
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Korean Journal of Food Science and Technology
2018 Volume.50 No. 3 p.260 ~ p.266
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Changes in physicochemical characteristics of sorghum among different varieties and at different harvest stages after heading
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Kim Sung-Kook
Jung Gun-Ho
Lee Jae-Eun
Lee Byoung-Kyu
Woo Koan-Sik
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Abstract
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The change in physicochemical characteristics of sorghum among different varieties and at different harvest stages after heading were evaluated. The proximate compositions and chromaticity of sorghum were significantly different, depending on their varieties and harvesting times. Water solubility was high in sorghum harvested on the 50th day after heading; however, the swelling power was reversed. Total polyphenol content of Hwanggeumchal, Nampungchal, and Sodamchal was 17.60-24.62, 17.88-24.67, and 17.37-22.37 mg GAE/g, respectively, and the flavonoid content was 10.43-13.50, 9.68-13.85, and 9.52-12.46 mg CE/g, respectively. The DPPH radical-scavenging activities were 9.94-16.21, 11.42-16.54, and 10.12-15.16 mg TE/g, respectively, and the ABTS radical-scavenging activities were 8.85-19.99, 10.51-20.24, and 9.71-17.93 mg TE/g, respectively. Total polyphenol and flavonoid contents, and radical scavenging activities were high in sorghum harvested on the 40-50th day after heading. As a result, it is considered that sorghum varieties such as Hwanggeumchal, Nampungchal, and Sodamchal should be harvested on the 40th day after heading.
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KEYWORD
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sorghum (Sorghum bicolor L. Moench), harvest stage, quality, physicochemical characteristics
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