Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Effects of Various Light Sources on the Carotenoid and Glucosinolate Contents in Chinese Cabbage (Brassica rapa L. ssp. pekinensis)

다양한 광원이 배추 내 Carotenoid와 Glucosinolate 함량에 미치는 영향

  • Sung, Ho-Young (Department of BioEnvironmental Chemistry, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Jo, Lee-Kyeong (Department of BioEnvironmental Chemistry, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Chun, Jin-Hyuk (Department of BioEnvironmental Chemistry, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Woo, Hyun-Nyung (Department of BioEnvironmental Chemistry, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Kim, Sun-Ju (Department of BioEnvironmental Chemistry, College of Agriculture and Life Sciences, Chungnam National University)
  • 성호영 (충남대학교 농업생명과학대학 생물환경화학과) ;
  • 조이경 (충남대학교 농업생명과학대학 생물환경화학과) ;
  • 천진혁 (충남대학교 농업생명과학대학 생물환경화학과) ;
  • 우현녕 (충남대학교 농업생명과학대학 생물환경화학과) ;
  • 김선주 (충남대학교 농업생명과학대학 생물환경화학과)
  • Received : 2018.04.25
  • Accepted : 2018.06.21
  • Published : 2018.06.30
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Abstract

BACKGROUND: Chinese cabbage biosynthesizes various phytochemicals including carotenoids and glucosinolates. Environmental stress has a major effect on the growth and yields of vegetables, and can significantly affect nutritionally important phytochemicals. Phytochemicals of plants are influenced by light, temperature, carbon dioxide, and growing conditions. The aim of this study was to investigate the effect of various light sources on carotenoid and glucosinolate contents in Chinese cabbage. METHODS AND RESULTS: [Experiment I] Set the control (field control, FC) on the ground. Using acrylic sunlight, experiments were set up transparency box (field transparency, FT), red box (field red, FR) and blue box (field blue, FB). [Experiment II] Set the control (chamber control, CC) in the greenhouse. Using plant growth chamber with artificial light, experiments were set up LED red (chamber red, CR), LED blue (chamber blue, CB), LED mixed red+blue (chamber red+blue, CRB) and fluorescent (chamber fluorescent, CF). After plant growth, Chinese cabbage was harvested at 110 days after sowing (DAS). The status of plants growth (leaf length, width, fresh weight etc.) was immediately investigated. Carotenoid and GSL contents were analyzed by HPLC. [Experiment I] Results documented that the ranges of total carotenoid contents were 25.39 ~ 58.80 mg/kg dry wt for lutein, 0.84~ 4.22 mg/kg dry wt for zeaxanthin, and 3.85~18.71 mg/kg dry wt for ${\beta}$-carotene. Lutein was the highest for the content and the largest for the variation as well. [Experiment II] Results documented that the ranges of total carotenoid contents were 24.66~137.96 for lutein, 2.51~20.65 for zeaxanthin, and 8.40~49.80 mg/kg dry wt for ${\beta}$-carotene. The total carotenoid contents of CR (156.62) and CB (115.90) were 1.6~2.3 times larger than the other treatments, and ${\beta}$-carotene content was about twice as high as that of the other treatments on the CR (38.74 mg/kg dry wt.). [Experiment I] Total GSL content was the highest in FT (19.76) that was higher 1.7 times than the lowest treatment ($11.39{\mu}mol/g\;dry\;wt$.). [Experiment II] The total content of GSL was highest in CRB (4.19) and lowest in CF ($2.88{\mu}mol/g\;dry\;wt$.). In the CRB, total GSL contents ($4.19{\mu}mol/g\;dry\;wt$.) was the highest. CONCLUSION: Total and individual carotenoid and GSL contents in Chinese cabbage show significant differences under different light sources. Red and blue lights contribute to significant carotenoids expression and antioxidant activity for nutrition and health benefits. These results concluded that the introduction of varying lights affected the synthesis of important nutrient compounds in Chinese cabbage. It is predicted that the application of good light source enhances the accumulation of functional compounds.

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