Effects of different extraction methods on contents, profiles, and antioxidant abilities of free and bound phenolics of Sargassum polycystum from the South China Sea
文献类型： 外文期刊
作者： Wu, Yujiao 1 ; Gao, Heqi 1 ; Wang, Yuxi 1 ; Peng, Ziting 1 ; Guo, Zhiqiang 2 ; Ma, Yongxuan 3 ; Zhang, Ruifen 4 ; Zhang, Mingwei 4 ; Wu, Qian 5 ; Xiao, Juan 1 ; Zhong, Qiuping 1 ;
作者机构： 1.Hainan Univ, Sch Food Sci & Engn, Engn Res Ctr Utilizat Trop Polysaccharide Resourc, Minist Educ,Key Lab Food Nutr & Funct Food Hainan, Haikou 570228, Hainan, Peoples R China
2.Hainan Univ, Sch Life Sci, State Key Lab Marine Resource Utilizat South Chin, Haikou, Hainan, Peoples R China
3.Guangzhou Liheng Clin Nutr Co Ltd, Guangzhou, Peoples R China
4.Guangdong Acad Agr Sci, Sericultural & Agrifood Res Inst, Key Lab Funct Foods, Minist Agr & Rural Affairs,Guangdong Key Lab Agr, Guangzhou, Peoples R China
5.Hubei Univ Technol, Natl Ctr Cellular Regulat & Mol Pharmaceut 111, Hubei Res Ctr Food Fermentat Engn & Technol, Key Lab Fermentat Engn,Minist Educ,Hubei Key Lab, Wuhan, Peoples R China
关键词： antioxidant ability; bound phenolic; free phenolic; Sargassum polycystum; seaweed
期刊名称：JOURNAL OF FOOD SCIENCE （ 影响因子：3.693； 五年影响因子：3.856 ）
ISSN： 0022-1147
年卷期： 2022 年 87 卷 3 期
页码：
收录情况： SCI
摘要： Total phenolic content (TPC), phenolic profiles, and antioxidant activity of free and bound extracts of Sargassum polycystum, obtained by different extraction solvents and hydrolysis methods, were investigated. Aqueous acetone afforded the highest free TPC and antioxidant ability, followed by aqueous ethanol and aqueous methanol. Twelve free phenolic compounds were identified by ultra-high-performance liquid chromatography-mass spectrometry (UHPLC-MS), including two hydroxycinnamic acids, seven flavonoids, one stilbene, and two phlorotannins. Three to nine different free phenolic compounds were extracted by these solvents with different compositions, including nine by 70% acetone and eight by 70% methanol, 70% ethanol, and 50% ethanol. The highest total content of free phenolic compounds determined by high-performance liquid chromatography-diode array detection was obtained from 70% ethanol. Alkaline hydrolysis afforded higher bound TPC (274.27 mg GAE/100 g DW) and antioxidant ability than acid hydrolysis. Five bound phenolic compounds were characterized by UHPLC-MS and five were released from alkaline hydrolysis, whereas two were released from acid hydrolysis. Total content of bound phenolic compounds released by alkaline hydrolysis was 14.68-fold higher than that by acid hydrolysis. The free and bound TPC, phenolic profiles, and antioxidant activities depended on the extraction solvent used. These results indicate that S. polycystum is a potentially useful antioxidant source and contribute to the development of seaweed-based functional foods. Practical Application Phenolics are usually divided into free and bound forms based on their extractability and interaction with cell wall components. The nutritional effects of bound phenolics in algae have long been neglected. These topics contribute to the development of seaweed-based functional foods.
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