Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Effects of Pre Harvest Light Treatments (LEDs, Fluorescent Lamp, UV-C) on Glucosinolate Contents in Rocket Salad (Eruca sativa)

수확 전 LED, 형광등, UV-C 조사가 로켓 샐러드 내 글루코시놀레이트 함량에 미치는 영향

  • Lee, Hye-Jin (Department of Bio-Environmental Chemistry, Chungnam National University) ;
  • Chun, Jin-Hyuk (Department of Bio-Environmental Chemistry, Chungnam National University) ;
  • Kim, Sun-Ju (Department of Bio-Environmental Chemistry, Chungnam National University)
  • 이혜진 (충남대학교 생물환경화학과) ;
  • 천진혁 (충남대학교 생물환경화학과) ;
  • 김선주 (충남대학교 생물환경화학과)
  • Received : 2016.02.16
  • Accepted : 2016.12.20
  • Published : 2017.04.28
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Abstract

The aim of this study was to investigate the effect of different light sources on the levels of glucosinolates (GSLs) in rocket salad (Eruca sativa L.). The light sources used in the study were: natural light (Control-1 or 2), red light-emitting diodes(LEDs), blue LEDs, mixed red and blue LEDs (R+B LEDs), white LEDs, fluorescent lamps (FL), and fluorescent lamps plus UV-C (FL+UV-C). Two separate experiments were conducted [Experiment I: Control-1, Red LED, Blue LED, Mix (R+B) LED and Experiment II: Control-2, White LED, FL, FL+UV-C] because of the limited number of growth chambers in our laboratory. The rate of increase in the length of rocket salad leaves was the highest under red LEDs and, FL confirming that red LED and, FL affect the growth of rocket salad. We separated and identified seven types of GSLs from the rocket salad:glucoraphanin, diglucothiobeinin, glucoerucin, glucobrassicin, dimeric 4-mercaptobutyl GSL, 4-methoxyglucobrassicin, and gluconasturtiin. The highest total GSL contents in Eexperiment I was found in plants grown under in red LEDs ($4.30{\mu}mol{\cdot}g^{-1}\;dry$ weight, DW), and the lowest under blue LEDs ($0.17{\mu}mol{\cdot}g^{-1}\;DW$). The highest total GSL contents in Experiment II was found in plants grown under FL ($13.45{\mu}mol{\cdot}g^{-1}\;DW$), and the lowest in FL+UV-C ($0.39{\mu}mol{\cdot}g^{-1}\;DW$). Especially in Experiment II, the content of dimeric 4-mercaptobutyl, which has a strong aroma and spicy flavor in rocket salad, was higher under FL and white LEDs than in Control-2, increasing by approximately 14.9 and 3.2-fold respectively. Therefore, light sources such as red LEDs, white LEDs and FL affected the accumulation of GSLs in rocket salad.

인공 광원에 따른 rocketsalad(Eruca sativa L.) 내 GSL 함량을 조사하였다. 실험에 사용한 광원의 종류는 자연광(Control-1 또는 2), Red LED, Blue LED, Mix(R+B) LED(Red LED+Blue LED), White LED, Fluorescent Lamp(FL), Fluorescent Lamp+UV-C(FL+UV-C). 실험은 식물 생장기 대수 제한 때문에 [실험 I;Control-1, Red LED, Blue LED, Mix(R+B) LED]과 [실험 II;Control-2, White LED, FL, FL+UV-C]로 구분하여 수행하였다. 그 결과, Red LED와 FL에서 rocket salad의 잎의 길이의 증가율이 가장 높았다. 그러므로 Red LED와 FL이 rocketsalad의 성장과 관계가 있음을 확인했다. Rocketsalad로부터 총 7종류의 GSLs(glucoraphanin, diglucothiobeinin, glucoerucin, glucobrassicin, dimeric 4-mercaptobutyl GSL, 4-methoxy glucobrassicin, gluconasturtiin)를 분리 및 동정하였다. [실험 I]에서 총 GSL 함량은 Red LED(4.30)에서 가장 높고 Blue LED($0.17{\mu}mol{\cdot}g^{-1}\;DW$)에서 가장 낮았다. [실험 II]에서 총 GSL 함량은 FL(13.45)에서 가장 높고 FL+UV-C($0.39{\mu}mol{\cdot}g^{-1}\;DW$)에서 가장 낮았다. 특히 Rocket salad의 강한 향과 매운 맛을 돋아주는 dimeric 4-mercaptobutyl 함량은 [실험 II]에서 Control-2에 비해 FL과 White LED가 각각 14.9, 3.2배 증가했다. 따라서 Red LED, White LED, FL은 rocket salad의 GSL 축적에 영향을 주었다고 판단된다.

Keywords

References

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