The Korean Journal of Food And Nutrition (한국식품영양학회지)

The Korean Society of Food and Nutrition (한국식품영양학회)
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Antioxidant Characteristics of Sweet Potato (Ipomoea batatas (L.) Lam.) according to Different Plant Parts and Drying Methods

건조방법에 따른 고구마 식물체 부위별 항산화특성

  • Eom-ji Hwang (National Institute of Crop Science, Rural Development Administration) ;
  • Tae Hwa Kim (National Institute of Crop Science, Rural Development Administration) ;
  • Won Park (National Institute of Crop Science, Rural Development Administration) ;
  • Kyo Hwui Lee (National Institute of Crop Science, Rural Development Administration) ;
  • Sang-Sik Nam (National Institute of Crop Science, Rural Development Administration) ;
  • You-jin Park (National Institute of Crop Science, Rural Development Administration) ;
  • Sehee Kim (National Institute of Crop Science, Rural Development Administration) ;
  • Hyeong-Un Lee (National Institute of Crop Science, Rural Development Administration) ;
  • Mi Nam Chung (National Institute of Crop Science, Rural Development Administration) ;
  • Tae Joung Ha (National Institute of Crop Science, Rural Development Administration) ;
  • Koan Sik Woo (National Institute of Crop Science, Rural Development Administration)
  • 황엄지 (농촌진흥청 국립식량과학원 ) ;
  • 김태화 (농촌진흥청 국립식량과학원) ;
  • 박원 (농촌진흥청 국립식량과학원 ) ;
  • 이교휘 (농촌진흥청 국립식량과학원 ) ;
  • 남상식 (농촌진흥청 국립식량과학원) ;
  • 박유진 (농촌진흥청 국립식량과학원 ) ;
  • 김세희 (농촌진흥청 국립식량과학원 ) ;
  • 이형운 (농촌진흥청 국립식량과학원) ;
  • 정미남 (농촌진흥청 국립식량과학원 ) ;
  • 하태정 (농촌진흥청 국립식량과학원 ) ;
  • 우관식 (농촌진흥청 국립식량과학원 )
  • Received : 2023.06.27
  • Accepted : 2023.07.24
  • Published : 2023.08.31
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Abstract

This study investigated the antioxidant characteristics of sweet potato according to different plant parts and drying methods. The sweet potato plant parts were divided into root tubers, stems, stalks, leaves, and tips, and the drying methods were freeze-drying and hot air drying. Total polyphenol and flavonoid contents and radical scavenging activity of the sweet potato plant parts were significantly different depending on the plant parts and drying methods. The total polyphenol content of freeze-dried sweet potato leaves and tips were 52.76 and 46.19 mg chlorogenic acid equivalents/g sample, and the total flavonoid contents were 222.47 and 214.12 mg quercetin equivalents/g sample, respectively, and decreased with hot air drying. DPPH radical scavenging activity was higher in freeze-drying than hot air drying and was significantly different depending on the plant parts. The ABTS radical scavenging activity of freeze-dried sweet potato leaves and tips were 43.48 and 44.68 mg Trolox equivalents/g sample, respectively, and decreased with hot air drying. Therefore, additional studies on the functionality of using by-products from sweet potato cultivation are needed.

Keywords

Acknowledgement

본 논문은 농촌진흥청 시험연구사업(과제번호: PJ017267032023)의 지원에 의해 이루어진 것임.

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