Effect of Light Emitting Diodes Treatment on Growth and Mineral Contents of Lettuce (Lactuca sativa L. ‘Chung Chi Ma')*

Seub, Shin Yong; 이문중,; 이은숙,; 안준형,; 도한우,; ), 최돈우 ( Choi Don-woo; 정종도,; Lee, Ji Eun; 김민기,; 박종욱,; 엄영철,; 박소득,; 채장희,

doi:10.11625/kjoa.2013.21.4.659

Cited by 20 publications

(13 citation statements)

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“…This result is in agreement with those of Park and Lee (1999) shown that environmental factors (nutrient level, nursery media, photoperiod, LEDs Irradiation, etc.) other than light intensity also affect the growth of lettuce (Park and Lee, 1999;Choi et al, 2011;Cha et al, 2012;Park et al, 2012;Shin et al, 2012; Estimation of Lettuce Growth Characteristics Under Different LED Light Intensities in a Closed-type Plant Factory Kwack et al, 2015). Shoot dry weight showed a similar tendency, with plants grown under 200 µmol•m -2 •s -1 showing dry weight about 39.63-293.51% higher than those grown at 100 and 150 µmol•m -2 •s -1 on 20 d after sowing.…”

Section: Discussionmentioning

confidence: 99%

Estimation of Lettuce Growth Characteristics Under Different LED Light Intensities in a Closed-type Plant Factory

Cho,

Kang,

Han

et al. 2018

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Section: Discussionmentioning

confidence: 99%

Estimation of Lettuce Growth Characteristics Under Different LED Light Intensities in a Closed-type Plant Factory

Cho,

Kang,

Han

et al. 2018

HST

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“…육지면 (Li et al, 2010)은 적:청(1:1) 혼합 LED에서 양호한 것으로 나타났다. 또한 폐쇄형 식물공장에서도 토마토 (Kim et al, 2014), 들깨 (Choi et al, 2003), 국화 (Im et al, 2013), 파프리카 (Lee et al, 2012) 등의 줄기신장은 적색보다 청색 LED에서 양호 하고, 상추 품종 '적치마상추'(Lee , 'Sunmang' 과 'Grand rapid TBR' (Son et al, 2012), 민들레 (Ryu et al, 2012) 등은 적색 LED에서, 그리고 고추냉이(Kim and You, 2013), 상추 'Lollo Rosa' (Shin et al, 2012) et al, 2008), 국화 (Im et al, 2013), 카네이션(Manivannan et al, 2017)에 서는 적색 LED가 촉진적인 것으로 나타나 본 실험결과와 같았으나, 상추 (Son et al, 2012), 지황 (Manivannan et al, 2015) Saebo et al, 1995;Yorio et al, 2001). 그러나 지 황 (Manivannan et al, 2015), 카네이션(Manivannan et al, 2017)의 기내배양에서는 청색 LED에서 생체중 및 건물중이 유의한 증가를 보였으며, 카네이션의 순광합성 및 증산속도도 청색 LED에서 가장 높게 나타나 기내생장에 미치는 광질의 영향은 식 물에 따른 종의존성이 높은 것으로 생각되었다 (Manivannan et al, 2015(Manivannan et al, , 2017.…”

Section: 결과 및 고찰unclassified

“…Light-emitting diodes(LED)는 단색광 조명이 가능하여 광합성 및 광형태 형성 등의 연구에 크게 공헌하여 왔으며, 1999년 1W 이상의 고휘도 LED가 개발되면서부터 식물재배에 널리 이용되기 시작하였다 (Bourget, 2008). 식물의 종류에 따라 인공광원 으로 적색과 청색 LED를 적절히 혼합하여 재배하면 생육촉진 (Kim and You, 2013;Shin et al, 2012)이나, 성분함량 증가 (Choi et al, 2014;Lee et al, 2010;Lee and Kim, 2014;Son et al, 2012) 등이 나타난다. 또한 기내 미세번식에서도 국화 (Kim et al, 2004b;Kurilcik et al, 2008), 스파티필럼 (Nhut et al, 2005), 카네이션 (Manivannan et al, 2017), 지황 (Hahn et al, 2000;Manivannan et al, 2015), 딸기 (Nhut et al, 2003b) 등에서 기내식물의 생육이나 형태형성 등이 촉진된다.…”

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Effects of Light-emitting Diodes on In Vitro Growth of Virus-free Sweet Potato Plantlets

Yoo,

Lee

2017

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The in vitro growth of virus-free sweet potato [Ipomoea batatas (L.) Lam.] plantlets was investigated under different light sources: fluorescent lamp (control); red (660 nm), blue (460 nm), white light-emitting diodes (LED), and two mixtures of blue and red LED (R:B = 8:2, and 7:3). Single node explants (10 mm) of three cultivars ('Matnami', 'Shincheonmi', and 'Yeonhwangmi') were cultured on Murashige and Skoog medium supplemented with 0.2mg•L-1 6-benzyladenine for 4 weeks. Explants were exposed to 150 ± 5 μmol•m-2 •s-1 photosynthetic photon flux at a distance of 20 cm, constant temperature of 25°C, and under 16/8-h (day/ night) photoperiod. Using the same method, the in vitro growth of 10 cultivars under red LED was also compared. After 3 weeks, vine length was highest in plantlets cultured under red LED, and lowest in plantlets cultured under blue LED. Fresh and dry weights were also greatest in plantlets cultured under red LED. Compared to the control, vine thickness was significantly higher in plantlets grown under white LED and the 7:3 R:B LED mixture. Significant differences were observed among the 10 cultivars grown under red LED. 'Matnami', 'Shincheonmi', and 'Shinhwangmi' all had excellent vine lengths, and fresh and dry weights. Compared to the control, vine elongation of sweet potato plantlets was most effective under red LED, and culture duration was about 1 week shorter.

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“…Numerous studies have been conducted on the plant factory using LED lamps: studies on the effects of light quality on growth of various greenhouse crops (Nishimura et al, 2006(Nishimura et al, (a), 20072009(d); Shin et al, 2012;Warrington and Mitchell, 1976;Mortensen and Stromme, 1987;Inada and Yabumoto, 1989;Pack et al, 2013), studies on plant growth with red light (Nishimura et al, 2006(Nishimura et al, (a), 2009; Nishioka et al, 2008), and studies on plant growth with blue light (Giliberto et al, 2005;Ramalho et al, 2002;Meng et al, 2004). However, more studies on Table 1.…”

Section: Introductionmentioning

confidence: 99%

System Design and Performance Analysis of a Variable Frequency LED Light System for Plant Factory

Han¹,

Kang²,

Lee³

et al. 2014

Journal of Biosystems Engineering

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The purpose of this study was to design a variable frequency LED light system for plant factory which combined red, blue, green, white, and UV lights and controlled the ratio of the light wavelength. In addition, this study evaluated the performance of each combination of LED to verify the applicability. Methods: Four combinations of LED (i.e. Red+Blue, Red+Blue+Green, Red+Blue+White, Red+Blue+UV) were designed using five types of LED. The system was designed to control the duty ratio of each wavelength of LED by 1% interval from 0~100%, the pulse by 1Hz interval from 1~20kHz. Response characteristics of the control system, spectral distribution of each combination, light uniformity and uniformity ratio were measured to test the performance of the system. Results: Clean waveforms were measured from 10Hz to 10kHz regardless of duty ratio. Frequency distortion was observed within 5% of inflection point at frequencies above 10kHz regardless of duty ratio, but it was judged negligible. Spectra showed a normal distribution, and maximum PPF with duty ratio of 100% was 271.4μmol‧m-2 ‧s-1 for the Red+Blue combination. PPF of the Red+Blue+Green combination was 258.9μmol ‧m-2 ‧s-1 , and that of the Red+Blue+White combination was 273.9μmol‧m-2 ‧s-1. PPF of the Red+Blue+UV combination was 267.7 μmol‧m-2‧s-1. Uniformity ratio for the area excepting border showed 0.90 for the Red+Blue and Red+Blue+White combinations, 0.87 for the Red+Blue+Green combination, and 0.88 for the Red+Blue+UV combination. The light was irradiated evenly at the area excepting border, so it was suitable for plant growing. Conclusions: From the results of this study, response characteristics of the control system, spectral distribution of each combination, light uniformity and uniformity ratio were suitable for applying into the plant factory.

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Effect of Light Emitting Diodes Treatment on Growth and Mineral Contents of Lettuce (Lactuca sativa L. ‘Chung Chi Ma')*

Cited by 20 publications

References 0 publications

Estimation of Lettuce Growth Characteristics Under Different LED Light Intensities in a Closed-type Plant Factory

Estimation of Lettuce Growth Characteristics Under Different LED Light Intensities in a Closed-type Plant Factory

Effects of Light-emitting Diodes on In Vitro Growth of Virus-free Sweet Potato Plantlets

System Design and Performance Analysis of a Variable Frequency LED Light System for Plant Factory

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