Phenolic Profiles and Antioxidant Activity of Buckwheat (Fagopyrum esculentum Möench and Fagopyrum tartaricum L. Gaerth) Hulls, Brans and Flours

doi:10.1016/S2095-3119(13)60371-82012-10-19

Journal of Integrative Agriculture ›› 2013, Vol. 12 ›› Issue (9): 1684-1693.DOI: 10.1016/S2095-3119(13)60371-82012-10-19

Phenolic Profiles and Antioxidant Activity of Buckwheat (Fagopyrum esculentum Möench and Fagopyrum tartaricum L. Gaerth) Hulls, Brans and Flours

LI Fu-hua, YUAN Ya, YANG Xiao-lan, TAO Shu-ying , MING Jian

1.College of Food Science, Southwest University, Chongqing 400715, P.R.China
2.Key Laboratory of Food Processing & Technology of Chongqing, Chongqing 400715, P.R.China
3.Laboratory of Quality & Safety Risk Assessment for Agro-Products on Storage and Presevation,, Mimnistry of Agriculture, Chongqing 400715, P.R.China

收稿日期:2012-10-29 出版日期:2013-09-01 发布日期:2013-09-15
通讯作者: Correspondence MING Jian, Tel: +86-23-68251298, Fax: +86-23-68251947, E-mail: mingjian1972@163.com
作者简介:LI Fu-hua, E-mail: fuhualee92@163.com
基金资助:
This work was supported by the Fundamental Research Funds for the Central Universities, China (XDJK2012B014).

Phenolic Profiles and Antioxidant Activity of Buckwheat (Fagopyrum esculentum Möench and Fagopyrum tartaricum L. Gaerth) Hulls, Brans and Flours

LI Fu-hua, YUAN Ya, YANG Xiao-lan, TAO Shu-ying , MING Jian

1.College of Food Science, Southwest University, Chongqing 400715, P.R.China
2.Key Laboratory of Food Processing & Technology of Chongqing, Chongqing 400715, P.R.China
3.Laboratory of Quality & Safety Risk Assessment for Agro-Products on Storage and Presevation,, Mimnistry of Agriculture, Chongqing 400715, P.R.China

Received:2012-10-29 Online:2013-09-01 Published:2013-09-15
Contact: Correspondence MING Jian, Tel: +86-23-68251298, Fax: +86-23-68251947, E-mail: mingjian1972@163.com
About author:LI Fu-hua, E-mail: fuhualee92@163.com
Supported by:
This work was supported by the Fundamental Research Funds for the Central Universities, China (XDJK2012B014).

摘要/Abstract

摘要： The extracts from hulls, brans and flours of Fagopyrum esculentum Möench (FEM, three varieties) and Fagopyrum tartaricum L. Gaerth (FTG, seven varieties) were screened for free and bound phenolic content or total phenolic content (TPC), as well as 1,1 diphenyl-2-picryl hydrazyl (DPPH) free radical scavenging activity and reducing power. Free phenolics were predominant in buckwheat hulls, brans and flours. FEM hulls extract exhibited the highest reducing power and DPPH free radical scavenging activity with the average EC50 84.54 μg mL-1 and IC50 11.54 μg mL-1 respectively, FTG brans extract had the highest average TPC (24.87 mg GAE g-1 DW), and FEM flours extract showed the lowest TPC, reducing power and radical scavenging activity. Furthermore, the correlations among TPC, DPPH free radical scavenging activity and reducing power of all the samples were investigated. The rank correlation coefficient (rs) between reducing power and DPPH free radical scavenging activity of buckwheat hulls, between TPC and DPPH free radical scavenging activity of buckwheat flours were 0.76 and 0.79, respectively (P<0.05). However, there is no significant correlation between the remaining indexes of hulls and flours, as well as the ten buckwheat brans. This result indicated that some non-phenolic compounds also contributed to the total antioxidant activity in hulls, brans and flours of buckwheats. This study demonstrated that buckwheat hulls and brans, rather than flours, are good source of antioxidants.

关键词: Fagopyrum esculentum Mö, ench , Fagopyrum tartaricum L. Gaerth , phenolic content , antioxidative activity , buckwheat , correlation analysis

Abstract: The extracts from hulls, brans and flours of Fagopyrum esculentum Möench (FEM, three varieties) and Fagopyrum tartaricum L. Gaerth (FTG, seven varieties) were screened for free and bound phenolic content or total phenolic content (TPC), as well as 1,1 diphenyl-2-picryl hydrazyl (DPPH) free radical scavenging activity and reducing power. Free phenolics were predominant in buckwheat hulls, brans and flours. FEM hulls extract exhibited the highest reducing power and DPPH free radical scavenging activity with the average EC50 84.54 μg mL-1 and IC50 11.54 μg mL-1 respectively, FTG brans extract had the highest average TPC (24.87 mg GAE g-1 DW), and FEM flours extract showed the lowest TPC, reducing power and radical scavenging activity. Furthermore, the correlations among TPC, DPPH free radical scavenging activity and reducing power of all the samples were investigated. The rank correlation coefficient (rs) between reducing power and DPPH free radical scavenging activity of buckwheat hulls, between TPC and DPPH free radical scavenging activity of buckwheat flours were 0.76 and 0.79, respectively (P<0.05). However, there is no significant correlation between the remaining indexes of hulls and flours, as well as the ten buckwheat brans. This result indicated that some non-phenolic compounds also contributed to the total antioxidant activity in hulls, brans and flours of buckwheats. This study demonstrated that buckwheat hulls and brans, rather than flours, are good source of antioxidants.

Key words: Fagopyrum esculentum Möench , Fagopyrum tartaricum L. Gaerth , phenolic content , antioxidative activity , buckwheat , correlation analysis

LI Fu-hua, YUAN Ya, YANG Xiao-lan, TAO Shu-ying , MING Jian. Phenolic Profiles and Antioxidant Activity of Buckwheat (Fagopyrum esculentum Möench and Fagopyrum tartaricum L. Gaerth) Hulls, Brans and Flours[J]. Journal of Integrative Agriculture, 2013, 12(9): 1684-1693.

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Phenolic Profiles and Antioxidant Activity of Buckwheat (Fagopyrum esculentum Möench and Fagopyrum tartaricum L. Gaerth) Hulls, Brans and Flours

Phenolic Profiles and Antioxidant Activity of Buckwheat (Fagopyrum esculentum Möench and Fagopyrum tartaricum L. Gaerth) Hulls, Brans and Flours

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