Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Analysis of Antioxidant Content and Growth of Agastache rugosa as Affected by LED Light Qualities

LED 광질 조건에 따른 배초향 생장 및 항산화 물질 함량 분석

  • Kim, Sungjin (Department of Horticultural Sciences, Chungnam National University) ;
  • Bok, Gwonjeong (Department of Horticultural Sciences, Chungnam National University) ;
  • Park, Jongseok (Department of Horticultural Sciences, Chungnam National University)
  • 김성진 (충남대학교 농업생명과학대학 원예학과) ;
  • 복권정 (충남대학교 농업생명과학대학 원예학과) ;
  • 박종석 (충남대학교 농업생명과학대학 원예학과)
  • Received : 2018.07.17
  • Accepted : 2018.07.27
  • Published : 2018.07.30
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Abstract

The aim of this study was to evaluate the effect of light quality using either monochromatic or combined LEDs on the growth and antioxidant accumulation of Agastache rugosa cultivated under hydroponics for 4 weeks. This experiment was performed in a controlled-environment room at $22{\pm}1^{\circ}C$ and $18{\pm}1^{\circ}C$ (day and night temperatures, respectively) and 50-70% relative humidity, with a provided photosynthetic photon flux density (PPFD) of $180{\pm}5{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ and irradiated with either monochromatic (W10 and R10) or mixed LEDs (W2B1G1, R3B1, R2B1G1, and W2B1G1) with a differing ratio of each LED's PPFD and fluorescent lighting (FL: control) with a 16/8 h photoperiod. Fresh and dry weights were highest for plants grown under the W2B1G1 treatment. A. rugosa grown with R10 had the greatest plant height but the lowest SPAD among all treatments. The concentration of rosmarinic acid in plants grown under W2B1G1 was significantly higher than that of plants grown under other treatments. Tilianin content was significantly higher in R3B1 than in the other treatments. However, whole-plant rosmarinic acid and tilianin content was the highest under the W2B1G1 condition. To cultivate A. rugosa in a plant factory, mixed-LED light conditions with W2B1G1 is considered to be more advantageous for the growth and antioxidant accumulation of A. rugosa. It is though that the total whole-plant antioxidant content is more crucial for commercial use; the present study demonstrates the potential to achieve higher content of functional materials in plants through the selection of light quality.

본 연구는 수경재배 방식으로 재배 된 배초향(Agastache rugosa)의 생장과 항산화 물질 축적에 대하여 단색 또는 복합 LEDs의 광질이 미치는 영향을 살펴 보고자 수행하였다. 본엽 4매인 배초향 묘를 수경재배 시스템에 정식하였으며, 백색(W10), 적색(R10), 혼합 LEDs (W2B1G1, R3B1, R2B1G1, W2B1G1: 각 LED의 PPFD 비율) 및 형광등(FL: 대조구)을 이용하여 $180{\pm}5{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$의 광합성광량자속밀도(PPFD)의 조건과, 16/8h 광주기, $22{\pm}1/18{\pm}1^{\circ}C$ (주/야간) 온도, $60{\pm}10%$의 상대 습도로 관리된 재배실에서 4주동안 배초향을 재배하였다. W2B1G1 광조건에서 자란 배초향의 생체중과 건물중은 모든 처리중에서 가장 큰 값을 나타내었다. R10 조건에서 재배 된 배초향은 초장이 가장 길었지만 SPAD는 모든 처리와 비교해서 가장 낮은 값을 보였다. 배초향의 건물중당 rosmarinic acid 농도는 W2B1G1 처리구에서 유의하게 높았다. 건물당 tilianin 함량은 다른 처리구들과 비교할 때, R3B1에서 유의적으로 가장 높았다. 그러나 전체 식물체에 함유 된 rosmarinic acid와 tilianin 함량은 W2B1G1 조건에서 가장 높았다. 식물공장에서 배초향을 재배하기 위해, W2B1G1으로 구성된 혼합 LED 광 조건이 배초향의 생장과 항산화 물질축적에 가장 유리한 것으로 나타났다. 본 연구는 식물 전체에 함유 된 항산화 물질의 총량이 상업적 용도로 중요하다는 것과, 광질의 최적 선택을 통해서 기능성물질의 증대가 가능하다는 것을 보여주었다.

Keywords

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