배양액의 종류 및 LED를 이용한 다양한 광질 조건이 물냉이의 생장과 glucosinolates 함량에 미치는 영향을 3주간의 수경재배를 통하여 살펴보았다. 물냉이 종자를 암면배지에 파종 후 발아시켜, 2주간 육묘하였다. 유묘들은 semi-DFT 시스템에 이식하였다. 환경조절실은 주간온도 20±1℃와 야간온도 16±1℃, 주간습도 65±10%와 야간습도 75±10%의 범위에서 조절되었으며 16/8h 조건의 광주기와 180±10μmol·m-2·s-1 광강도를 유지하였다. 배양액은 오오츠카 하우스 1A(OTS), 한국원시(HES)과 화란온실작물연구소(PBG) 배양액을 초기 EC 1.0-1.3, pH 6.2와 형광등을 광원으로 실험하였다(실험-1). 광질에 대한 생육과 glucosinolates 함량을 분석하기 위하여 단색광(적색: R10, 백색: W10) 처리구와 혼합광(적청녹색: R2B1G1, 백청녹색: W2B1G1, 적색: R10, 적청색: R5B1, 적청색: R3B1)처리구를 두었다. 물냉이 지상부의 생육은 3개의 배양액 처리구에서 유의적인 차이가 발견되지 않았지만, 뿌리의 생체중은 HES와 비교하여 PBG와 OTS에서 13.7%와 55.1% 증가하였다. OTS 처리는 PBG와 HES 처리구에 비해 gluconasturtiin 함량이 96%, 65% 증가하였다. 백색광조건(W10)과 비교하여 적색광(R10) 처리는 초장이 101.3% 증가하였다. 청색광 비율의 증가는 지상부 생육에 긍정적인 영향을 주었다. 물냉이의 건물중 당 glucosinolates 함량은 R2B1G1 처리구와 비교하여 R3B1 처리구에서 144.5% 증가하였으며, W10 처리구와 비교 시, 약 70% 증가하는 경향을 보였다. R3B1 처리구에서 물냉이의 생육과 총 glucosinolates의 함량이 가장 높게 나타났다.

Aim of this study was to investigate the effects of different nutrient solutions and various light qualities generated by LED on the growth and glucosinolates contents of watercress (Nasturtium officinale) grown under hydroponics for 3 weeks. The seeds of watercress were sown on crushed rockwool media and raised them for two weeks. They were transplanted in a semi-DFT (deep flow technique) hydroponics system. A controlled-environment room was maintained at 20±1℃ and 16±1℃ temperatures and 65±10% and 75±10% relative humidity (day and night, respectively), with a provided photosynthetic photon flux density (PPFD) of 180±10 μmol·m-2·s-1 and a photoperiod of 16/8h. To find out the best kinds of nutrient solutions for growing watercress, Otsuka House 1A (OTS), Horticultural Experiment Station in Korea (HES), and Netherland’s Proefstaion voor Bloemisterij en Gasgroente (PBG) were adapted with initial EC of 1.0-1.3 dS·m-1 and pH of 6.2, irradiating PPFD with fluorescent lamps (Ex-1). Either monochromatic (W10 and R10) or mixed LEDs (R5B1, R3B1, R2B1G1, and W2B1G1) were irradiated with a differing ratio of each LED’s PPFD to understanding light quality on the growth and glucosinolates contents of watercress (Ex-2). Although significant difference in the shoot growth of watercress was not found among three nutrient solutions treatments, but the root fresh weight increased by 13.7% and 55.1% in PBG and OTS compared to HES, respectively. OTS increased the gluconasturtiin content by 96% and 65% compared to PBG and HES. Compared with the white light (W10), the red light (R10) showed a 101.3% increase in the shoot length of watercress. Increasing blue light portion positively affected plant growth. The content of total glucosinolates in watercress was increased by 144.5% and 70% per unit dry weight in R3B1 treatment compared with R2B1G1 and W10 treatments, respectively. The growth and total glucosinolates contents of the watercress were highest under R3B1 among six light qualities.

Abstract
 서 론
 재료 및 방법
  1. 식물 재료
  2. 재배 시스템
  3. 배양액 종류 및 LED 광원
  4. Glucosinolate 분석
  5. 생육측정 및 통계분석
 결과 및 고찰
  1. 배양액에 따른 물냉이의 생육 및 glucosinolates 함량
  2. 광질 종류에 따른 물냉이 생육
 적 요
 인용문헌

• 최재윤(충남대학교 농업생명과학대학 원예학과) | Jae Yun Choi (Department of Horticulture, College of Agricultural and Life Science, Chungnam National University)
• 김성진(충남대학교 농업생명과학대학 원예학과) | Sung Jin Kim (Department of Horticulture, College of Agricultural and Life Science, Chungnam National University)
• 복권정(충남대학교 농업생명과학대학 원예학과) | Kwon Jeong Bok (Department of Horticulture, College of Agricultural and Life Science, Chungnam National University)
• 이광야(한국농어촌공사 재난안전처 농업가뭄센터) | Kwang Ya Lee (Agricutural Drought Mitigation Center, Korea Rural Corporation (KRC))
• 박종석(충남대학교 농업생명과학대학 원예학과) | Jong Seok Park (Department of Horticulture, College of Agricultural and Life Science, Chungnam National University) Corresponding author