Development of Plant Growth Apparatus Using Blue and Red Led as Artificial Light Source

Okamoto, K.; Yanagi, Tetsuo; Takita, Shinichi; Tanaka, Michio; Higuchi, Takanobu; Ushida, Yuta; Watanabe, Hirokazu

doi:10.17660/actahortic.1996.440.20

Cited by 86 publications

(51 citation statements)

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“…Nhut et al (2002) developed a plant culture system with red and blue LEDs for micropropagation. Okamoto et al (1996) devised several plant growth apparatus using red and blue LEDs , and conducted growth experiments changing the blue to red ratio. Goto et al .…”

Section: Plant Responses To Light Qualitymentioning

confidence: 99%

“…LEDs emitting a variety of defined wavelengths are available now, and became more common recently as a light source in plant growth studies. These include reports on the effects of light quality on plants such as wheat (Tripathy and Brown, 1995 ;Goins et al, 1997), pepper plant (Brown et al, 1995;Schuerger et al, 1997), lettuce (Hoenecke et al, 1992;Yanagi et al, 1996;Okamoto et al, 1997;Yorio et al, 2001), spinach (Yorio et al, 2001;Stryjewski et al, 2001), and radish (Yorio et al, 2001). …”

Section: Spectral Parametersmentioning

confidence: 99%

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Effects of Light Quality on Growth of Crop Plants under Artificial Lighting

Gotō

2003

ecb

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Major light factors affecting plant growth are light quality, light intensity, photoperiod, and the day/night cycle. These parameters can be controlled under greenhouse conditions using artificial light sources. Moreover, application of light pulses and shortterm changes of the spectral composition are effective ways to stimulate plants and to induce desired morphological developments.Controlling spectral qualities of the irradiation applied enables faster growth or higher yield at a given radiation energy, and the production of plants of optimized nutritional value. Recent developments of lighting technology have enabled not only researchers but also farmers to control spectral qualities by combinations of various light sources with different waveband emissions.This review summarizes previous papers and evaluates significant effects of the quality of artificial light on growth and development of higher plants, especially crops.

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Section: Plant Responses To Light Qualitymentioning

confidence: 99%

Section: Spectral Parametersmentioning

confidence: 99%

Effects of Light Quality on Growth of Crop Plants under Artificial Lighting

Gotō

2003

ecb

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“…Red light is important in stem/shoot elongation, phytochrome responses and changes in plant anatomy (Schuerger et al, 1997). The red light also contributes to plant photosynthesis by allowing the opening of stomata at appropriate times for the plant to take up enough carbondioxide and hence metabolic influence of the red light cannot be ignored (Okamoto et al, 1996). On the other hand, blue light is important in chlorophyll biosynthesis and chloroplast maturation, stomatal opening, enzyme synthesis and the whole process of photosynthesis (Samuoliene et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Influence of spectral properties on cassava leaf development and metabolism

Nuwamanya¹,

Rubaihayo²,

Mukasa³

et al. 2014

Afr. J. Biotechnol.

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Cassava's importance as a food security crop in Sub Saharan Africa will be enhanced by its special traits such as tolerance to drought and high yields under hydrothermal stress. Some of the special traits which include the light reflective and absorptive properties of the leaves that depend on the surface characteristics of the leaves, are variety dependent and may influence the plants' reaction to light; hence, its photosynthetic capacity. We investigated the differences in the leaf spectral properties in different cassava varieties and related them to leaf biochemical properties using 20 cassava varieties established in a randomized complete block design in Kasese, western Uganda. Time dependent changes in leaf spectral characteristics were studied using Digimizer software and related to changes in sugar and pigment properties. Changes in the amount of reflected light were observed for the three main wavelengths used by plants (blue, green and red) with the blue being the most preferred. Total soluble free sugars exhibited a diurnal pattern from lower values (0.07 mg/g) after the dark period to higher values (0.313 mg/g) as the day progressed and was different from those of translocatable sugars such as sucrose. Chlorophyll a exhibited a curved pattern in all varieties increasing with increase in light intensity from 09:00 h (0.18 ug/g), peaking at 15:00 h (0.22 ug/g) and dropping down in concentration by 18:00 h (0.16 ug/g). Significant differences were observed in cassava varieties for the concentration of chlorophylls and carotenes. The results were obtained at a time of optimal growth conditions (four months after planting) and were used to classify these varieties into three broad groups showing that studies on spectral properties of leaves can still give a lot of insights in selection for stress tolerance under less optimal stress. The significant changes observed in the phenotype especially the foliar portion of the plant with the stay green and early recovering mechanisms of tolerance identified also tarried well with observed spectral differences. The results show that studies on plant spectral properties can be important in making inferences on the plants physiological and growth status.

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“…광 파장과 작물의 생육과의 관계에 대한 오랜 연구 결과 적색광은 식물체의 광합성에 영향을 미치고 청색광은 형 태학적으로 식물체의 건전한 생장에 필수 요소임이 밝혀 졌다 (Okamoto et al 1996). 또한 애기장대에 청색광을 조 사하였을 때 하배축의 신장을 억제하고 자엽 확장을 유 발하며, 적색광은 하배축 신장과 자엽 확장을 촉진한다 는 보고가 있었다 (Whitelam and Halliday 2007).…”

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Effect of LED mixed light conditions on the glucosinolate pathway in brassica rapa

et al. 2015

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In the agricultural industries, LEDs are used as supplementary, as well as main lighting sources in closed cultivation systems. In cultivation using artificial light sources, various light qualities have been tried to supplement fluorescent lamps to promote plant growth and metabolism. Microarray analysis of Brassica rapa seedlings under blue and fluorescent mixed with blue light conditions identified changes in three genes of the glucosinolate pathway. This attracted attention as functional materials highly expressed 3.6-4.6 fold under latter condition. We selected four more genes of the glucosinolate pathway from the Brassica database and tested their expression changes under fluorescent light mixed with red, green, and blue, respectively. Some genes increased expression under red and blue mixed conditions. The Bra026058, Bra015379, and Bra021429; the orthologous genes of CYP79F1, ST5a, and FMOGS-OX1 in Arabidopsis, are highly expressed in Brassica rapa under fluorescent mixed with blue light conditions. Further, Bra029355, Bra034180, Bra024634, and Bra022448; the orthologous genes of MAM1, AOP3, UGT74B1, and BCAT4 in Arabidopsis, are highly expressed in Brassica rapa under fluorescent mixed with red light conditions. The various light conditions had unique effects on the varieties of Brassica, resulting in differences in glucosinolate synthesis. However, in some varieties, glucosinolate synthesis increased under mixed blue light conditions. These results will help to construct artificial light facilities, which increase functional crops production.

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Development of Plant Growth Apparatus Using Blue and Red Led as Artificial Light Source

Cited by 86 publications

References 0 publications

Effects of Light Quality on Growth of Crop Plants under Artificial Lighting

Effects of Light Quality on Growth of Crop Plants under Artificial Lighting

Influence of spectral properties on cassava leaf development and metabolism

Effect of LED mixed light conditions on the glucosinolate pathway in brassica rapa

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