Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Growth and Photomorphogenesis of Cucumber Plants under Artificial Solar and High Pressure Sodium Lamp with Additional Far-red Light

태양광 파장 유사 조합광과 원적색광이 추가된 고압나트륨등 하에서의 오이의 생육과 광형태형성

  • Kang, Woo Hyun (Department of Plant Science, Seoul National University) ;
  • Kim, Jae Woo (Department of Plant Science, Seoul National University) ;
  • Son, Jung Eek (Department of Plant Science, Seoul National University)
  • 강우현 (서울대학교 식물생산과학부) ;
  • 김재우 (서울대학교 식물생산과학부) ;
  • 손정익 (서울대학교 식물생산과학부)
  • Received : 2018.12.31
  • Accepted : 2019.01.18
  • Published : 2019.01.31
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Abstract

Plant growth and morphology are affected by light environments. The morphogenesis and growth of the plants growing in plant factories are different from those grown under sunlight due to the effect of far-red light included in sunlight. The objective of this study was to compare the morphogenesis and growth of cucumber plants grown under artificial sunlight, high pressure sodium lamp (HPS), and HPS with additional far-red light (HPS+FR). The artificial solar (AS) with a spectrum similar to sunlight was manufactured using sulfur plasma lamp, incandescent lamp, and green-reducing optical film. HPS was used as a conventional electrical light source and far-red LEDs were added for HPS+FR. The optical properties of each light source was analyzed. The morphogenesis, growth, and photosynthetic rate were compared in each light source. The ratio of red to far-red lights and phytochrome photostationary state were similar in AS and HPS+FR. There were significant differences in morphology and growth between HPS and HPS+FR, but there were no significant differences between AS and HPS+FR. SPAD was highest in HPS, while photosynthetic rate was higher at AS and HPS. Although the photosynthetic rate in HPS+FR was lower than HPS, the growth was similar in AS. It was because canopy light interception was increased by longer petioles and larger leaf areas induced by FR. It is confirmed that the electrical light with additional far-red light induces similar photomorphogenesis and growth in sunlight spectrum. From the results, we expect that similar results will be obtained by adding far-red light to electrical light sources in plant factories.

식물의 생육과 형태는 광 환경에 영향을 받는다. 식물공장에서 재배되는 작물의 형태형성과 생육은 태양광과 다른 양상을 보이며 이는 태양광에 존재하는 원적색광 영역에 의한 영향으로 유추된다. 본 연구의 목적은 태양광 파장 유사 조합광(AS), 고압나트륨등(HPS) 및 원적색광을 추가한 고압나트륨등(HPS+FR)에서 재배된 오이의 형태형성과 생육을 비교하는 것이다. AS는 황 플라즈마 광원과 백열등, 녹색 광 차단 필름을 이용하여 제작하였다. 인공광원은 HPS를 이용하였고, 여기에 원적색광 LED를 추가하여 각 광원의 특성 및 식물의 형태형성, 생육 및 광합성 속도를 비교하였다. R/FR 값과 PSS는 AS와 HPS+FR이 유사하였다. 식물의 형태와 생육은 HPS와 HPS+FR 간에는 유의한 차이가 있었지만 AS와 HPS+FR간에는 유의한 차이가 없었다. SPAD는 HPS에서 높았으며 광합성속도는 AS와 HPS에서 높았다. HPS+FR의 광합성 속도는 HPS에 비해 낮았지만 원적색광에 의한 엽면적과 엽병 길이 증가로 인해 수광 면적이 증가하였고, 결과적으로 AS와 유사한 생육이 나타난 것으로 판단되었다. 인공광원에 원적색광을 추가하였을 때 태양광 하에서와 유사한 광형태형성 및 생육이 나타나는 것을 확인하였다. 이러한 결과로부터 식물공장에서 기존의 인공광원에 원적색광을 추가하면 동일한 효과를 얻을 수 있을 것으로 기대한다.

Keywords

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