Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Response of the Growth Characteristics and Phytochemical Contents of Pepper (Capsicum annuum L.) Seedlings with Supplemental LED Light in Glass House

LED 보광처리가 고추(Capsicum annuum) 묘의 생장과 Phytochemical 함량에 미치는 영향

  • Azad, Md. Obyedul Kalam (Department of Horticulture and Breeding, School of Bioresource Sciences, Andong National University) ;
  • Chun, Ik-Jo (Department of Horticulture and Breeding, School of Bioresource Sciences, Andong National University) ;
  • Jeong, Jeong-Hak (Department of Horticulture and Breeding, School of Bioresource Sciences, Andong National University) ;
  • Kwon, Soon-Tae (Department of Horticulture and Breeding, School of Bioresource Sciences, Andong National University) ;
  • Hwang, Jae-Moon (Department of Horticulture and Breeding, School of Bioresource Sciences, Andong National University)
  • ;
  • 전익조 (국립안동대학교 생명자원과학부 원예육종학) ;
  • 정정학 (국립안동대학교 생명자원과학부 원예육종학) ;
  • 권순태 (국립안동대학교 생명자원과학부 원예육종학) ;
  • 황재문 (국립안동대학교 생명자원과학부 원예육종학)
  • Received : 2011.03.21
  • Accepted : 2011.09.01
  • Published : 2011.09.30
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Abstract

This research was conducted to evaluate the effect of supplemental light-emitting diode (LED) light on growth characteristics and phytochemical content of pepper (Capsicum annuum L.) seedling using LED blue (470 nm, B), red (660 nm, R), blue + red (BR), far red (740 nm, FR) and UV-B (300 nm) light treatment, and without artificial light. Photon flux of LED light was 49, 16, 40, 5.0 and $0.82{\mu}mol\;m^{-2}s^{-1}$ for B, R, BR, FR, and UV-B light, respectively, during experiment. Supplemental LED light duration was $16hr\;day^{-1}$ and UV-B light duration was 10 min. per day after sunset up to 15 days (12 days after germination) of plants age. In our research, growth characteristics and phytochemical content of pepper seedlings were greatly influenced by supplemental LED light compare to control treatment. Red light increased the number of leaves, number of nodes, leaf width and plant fresh weight by 34%, 27%, 50% and 40%, respectively. Blue light increased the leaf length by 13%, and stem length and length of inter node were increased by 17% and 34%, respectively under grown far red light. After 15 days of light treatments phytochemical concentrations of pepper plants were significantly changed. Blue light enhanced the total anthocyanin and chlorophyll concentration by 6 times and 2 times, respectively. Red light increased the total phenolic compound at least two folds meanwhile far red light reduced the ascorbic acid and antioxidant activity 31% and 66%, respectively compared to control treatment.

본 연구는 LED(light-emitting diode) 보광이 온실에서 키운 어린 고추의 생장과 식물성 화학물질(phytochemical) 함량에 미치는 영향을 조사하였다. 처리한 LED광원은 청색광(470nm), 적색광 (660nm), 청색 + 적색광, 근적색광(740nm), 그리고 자외선(UV-B 300nm)이며. 실험기간 중의 이들 광원의 Photon flux는 각각 49, 16, 40, 5.0, 그리고 $0.82{\mu}mol\;m^{-2}s^{-1}$이었다. LED 광은 낮 동안 16시간이며 UV-B 는 일몰 후 10분간 발아 후 12일간 매일 처리되었다. 실험 결과, 광처리는 무처리에 비하여 고추의 생장과 식물성 화학물질(phytochemical) 함량에 상당한 변화를 보였다. 적색광 처리는 고추의 엽수, 마디수, 엽폭과 생체중을 각각 약 34%, 27%, 50%와 40% 증가되었다. 청색광 처리도 엽장을 약 13% 증가시켰고, 근적색광 처리에 의해 경장과 절간장을 각각 17%와 34% 정도 증가시켰다. 파종 15일에 수확한 고추 잎의 총 안토시아닌(anthocyanin)과 엽록소(chlorophyll) 함량은 청색광 처리에서 무처리에 비해 각각 6배와 2배가 증가하였다. 적색광은 총 페놀성화합물(phenolic compound) 함량을 최소 2배로 증가시켰으며, 반면에 근적색광은 아스코르빅 산(ascorbic acid)과 항산화능(antioxidant activity)을 각각 31%와 66%를 감소시켰다.

Keywords

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