Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Evaluation of Individual Glucosinolates, Phytochemical Contents, and Antioxidant Activities under Various Red to Far-Red Light Ratios in Three Brassica Sprouts

적색/원적색광 조사 비율에 따른 3종 배추과 채소 새싹의 Glucosinolate 함량 및 항산화 기능성 평가

  • Jo, Jung Su (Department of Horticulture, College of Agriculture & Life Sciences, Chonbuk National University) ;
  • Lee, Jun Gu (Department of Horticulture, College of Agriculture & Life Sciences, Chonbuk National University)
  • Received : 2018.07.30
  • Accepted : 2018.10.25
  • Published : 2018.10.30
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Abstract

The aim of this study was to evaluate the individual glucosinolate (GSL), total phenol, total flavonoid, and vitamin C content, and antioxidant activity under various light quality condition, mainly focusing on red (R) to far-red (FR) light ratios in three Brassica sprouts (radish, Chinese cabbage, and broccoli). Three R/FR ratio of 0.6, 1.3, and 2.0 were exposed to 5-day old sprouts for 48 h in a controlled environment, and the targeted phytochemical contents and antioxidant activities were compared with three separate control plot of dark, fluorescent, and red:blue 8:2 conditions. Total GSL content was highest in broccoli among the cultivars throughout the respective treatments, and increased with the increasing of R/FR ratio in the broccoli sprouts, while the content showed non-significant results in the Chinese cabbage sprouts. The progoitrin, a major GSL in Chinese Cabbage and broccoli, content decreased by upto 38% and 69%, respectively, with decreasing the R/FR ratio compared to the control plots (fluorescent, red:blue 8:2, and dark condition). The contents of phenol, flavonoid, and vitamin C were lowest in dark condition in all the three Brassica sprouts. The total phenol content and antioxidant activities increased with decreasing the R/FR ratio in all the Brassica sprouts, while total flavonoid and vitamin C content showed different patterns depending upon the Brassica sprouts. These results suggest that additional use of FR is expected to improve the functional quality of Brassica sprouts in different ways.

본 연구의 목적은 3가지의 배추과 작물의 새싹에서 적색(R)과 원적외선(FR)광에 초점을 맞추어서 glucosinolate(GSL), 총 페놀, 총 플라보노이드, 비타민 C 함량, 항산화 활성을 평가하는 것이다. 제한된 환경조건에서 5일된 새싹에 3가지의 R/FR비율을 2일동안 24시간 노출시켜 식물화학물질과 항산화활성을 대조군[형광등, R:B(8:2), 암조건]과 비교하였다. 총 GSL 함량은 각 처리 기간 동안 3가지의 작물 중 브로콜리에서 가장 높았으며, 브로콜리 새싹에서 R/FR 비율이 증가함에 따라 총 GSL 함량이 감소하는 반면 배추와 무의 새싹에서는 유의하지 않은 결과를 보여주었다. 배추 및 브로콜리의 주요 GSL인 progointrin은 대조군에 비해 R/FR 비율이 감소함에 따라 최대 38%, 69%까지 감소하였다. 3가지 배추과 새싹에서 페놀, 플라보노이드 및 비타민 C의 함량 모두 암조건에서 가장 낮았다. 총 페놀 및 항산화 활성은 3가지 배추과 새싹에서 R/FR 비율이 감소할수록 증가하는 반면, 총 플라보노이드와 비타민 C 함량은 작물 간 다른 양상을 보였다. 이러한 결과는 FR의 보광에 따라 배추과 새싹의 기능적 품질을 향상시킬 것으로 기대된다.

Keywords

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