Effect of Air Temperature on Growth and Phytochemical Content of Beet and Ssamchoo

온도처리가 비트와 쌈추의 생육과 생리활성 물질 함량에 미치는 영향

  • Lee, Sang Gyu (Vegetable Research Division, National Institute of Horticultural and Herbal Sciences, RDA) ;
  • Choi, Chang Sun (Vegetable Research Division, National Institute of Horticultural and Herbal Sciences, RDA) ;
  • Lee, Hee Ju (Vegetable Research Division, National Institute of Horticultural and Herbal Sciences, RDA) ;
  • Jang, Yoon Ah (Vegetable Research Division, National Institute of Horticultural and Herbal Sciences, RDA) ;
  • Lee, Jun Gu (Department of Horticulture, Chonbuk National University)
  • 이상규 (농촌진흥청 국립원예특작과학원 채소과) ;
  • 최장선 (농촌진흥청 국립원예특작과학원 채소과) ;
  • 이희주 (농촌진흥청 국립원예특작과학원 채소과) ;
  • 장윤아 (농촌진흥청 국립원예특작과학원 채소과) ;
  • 이준구 (전북대학교 원예학과)
  • Received : 2014.04.02
  • Accepted : 2014.11.02
  • Published : 2015.06.30


The consumption of leaf vegetables has been steadily increasing in Korea. Leaf vegetables are used for "Ssam (vegetable wrap-up), eaf vegetables has been steadily increasing in Korea. Leaf vegetables are used for asoned condiments inside several layers of young vegetable leaves. This study investigated the effect of air temperature on the growth and phytochemical contents of beet (Beta vulgaris L.) and Ssamchoo (Brassica lee L. ssp. namai) grown in a closed-type plant factory system where fluorescent lamps were used as an artificial light source. Seeds of beet and Ssamchoo were sown in a peat-lite germination mix. The roots of 20-day-old seedlings were washed, and the seedlings were planted on a styrofoam board and grown in hydroponic beds for 25 days under fluorescent light. Plants were exposed to one of three different air temperature regimes (20, 25 and $30^{\circ}C$ during the day combined with $18^{\circ}C$ during the night), which were monitored with a sensor at 30 cm above the plant canopy. Increased plant height and leaf area were observed in beet at $25^{\circ}C$ and $30^{\circ}C$ compared to $20^{\circ}C$. For Ssamchoo, the greatest plant height, leaf area, fresh weight and dry weight were obtained at $20^{\circ}C$. Ascorbic acid content of beet and Ssamchoo leaves were highest at $30^{\circ}C$. In beet, total polyphenol and flavonoid contents were higher at $20^{\circ}C$ (42.4, $197.0mg{\cdot}g^{-1}DW$) and $25^{\circ}C$ (46.9, $217.0mg{\cdot}g^{-1}DW$) than $30^{\circ}C$ (22.4, $88.0mg{\cdot}g^{-1}DW$). In Ssamchoo, total polyphenol and flavonoid contents were also higher at $20^{\circ}C$ (79.2, $268.2mg{\cdot}g^{-1}DW$) and $25^{\circ}C$ (66.3, $258.3mg{\cdot}g^{-1}DW$), respectively, than $30^{\circ}C$ (53.7, $134.7mg{\cdot}g^{-1}DW$). Hence, the optimum temperature appears to be $20^{\circ}C$ for growing both beet and Ssamchoo in a closed-type plant factory system with fluorescent light.


ascorbic acid;chlorophyll;flavonoid;polyphenol


Supported by : 농촌진흥청


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