LEDs for energy efficient greenhouse lighting

Singh, Devesh; Basu, Chandrajit; Meinhardt‐Wollweber, Merve; Roth, Bernhard

doi:10.1016/j.rser.2015.04.117

Cited by 344 publications

(205 citation statements)

References 52 publications

(80 reference statements)

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“…The light-emitting diode (LED) is a unique type of semiconductor diode and has great advantages for indoor plant cultivation over above traditional light resources including small size, specific wavelength, low thermal output, adjustable light intensity and quality, as well as high photoelectric conversion efficiency [11][12][13][14]. Such advantages make LEDs ideal for supporting plant growth in a controlled environment such as plant growth chamber.…”

Section: Introductionmentioning

confidence: 99%

LED Light Spectrum Affects the Photosynthetic Performance of Houttuynia Cordata Seedlings

Wang¹

2015

AJOP

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Abstract:We investigated the effects of light-emitting diodes (LED) with various light spectrum (white, red, yellow, green and blue) on photosynthesis of Houttuynia cordata seedlings. The seedlings were either cultivated under florescent lamp or under various LED lights. The leaves were collected and chlorophyll fluorescence parameters, the contents of chlorophyll, soluble sugar and relative water were measured, chloroplasts were observed as well. The results showed chlorophyll fluorescence parameters as Fv/Fm, qP and qY values were the highest under blue LED light and the values were the lowest under green LED light. Red LED light resulted in the enhanced chlorophyll content compared with the other LED lights, and the chl a/chl b ratio did not change significantly among LED treatments. The soluble sugar content was not significantly different among the treatments. The red LED increased relative water content and the green LED decreased the water content. Observation of chloroplasts in the leaves of Houttuynia cordata seedlings showed chloroplast number and distribution were altered by various light spectrum where chloroplasts were smaller under blue LED, and appeared to be more scattered under red LED. Our results indicated that photosynthesis of Houttuynia cordata seedlings respond differently to various light spectrum emitted by florescent lamp and LED.

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Section: Introductionmentioning

confidence: 99%

LED Light Spectrum Affects the Photosynthetic Performance of Houttuynia Cordata Seedlings

Wang¹

2015

AJOP

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“…Several reports have confirmed successful growth of plants (Table 11) under LED illumination (Singh et al, 2015;Yanagi and Okamoto, 1997). Red (610-720 nm) light is required for the development of the photosynthetic apparatus and photosynthesis, whereas blue (400-500 nm) light is also important for the synthesis of chlorophyll, chloroplast development, stomatal opening and photomorphogenesis (Saebo et al, 1995).…”

Section: Leds Source For Plantsmentioning

confidence: 92%

“…Singh et al, 2015) the way we hunt and gather. The most important and disruptive idea is what they call "Vertical Pink Farms" and it is set to decentralise the food industry forever.…”

Section: Vertical Pink Farming: Harnesses the Technology To Grow Cropsmentioning

confidence: 99%

Effect of physical seed treatment on yield and quality of crops: A review

Govindaraj¹,

Masilamani²,

Albert³

et al. 2017

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Seed treatments are the biological, physical and chemical agents and techniques applied to seed to provide protection and improve the establishment of healthy crops. The benefits of seed treatments are increased germination, uniform seedling emergence, protect seeds or seedlings from early season diseases and insect pests improving crop emergence and its growth. Anthropogenic changes of the soil, water and atmosphere due to the use of different chemical additives for raising plants productivity led to searching alternative ways. Safe methods for increasing the yield includes the reasonable use of chemicals and substitution of some of them by appropriate physical treatments viz., magnetic field, gamma irradiation, electric field, laser irradiation, sound, healing energy, light and heat.Key words: Energy treatment, Germination, Seedling vigour, Seedling growth, Seed yield.Recently the use of physical methods for plant growth stimulation is getting more popular due to the less harmful influence on the environment. Physical factors can be used to get positive biological changes in crop plants without affecting the ecology. Growth, development and yield of dill seed is accelerated using physical treatment. All living processes are highly dependent on energy exchange between the cell and the environment. This is the core concept in "quantum agriculture" that has been intensively discussed in the last decades (www.btinternet.com). Energy treatment is an innovative area of research to improve the yield of crops. It initiates physiological and biochemical changes, which reflect the plant growth and development processes and ultimately improve the yield and quality of produce. Treatment led to change of seed vitality indices (germinating energy, germination, and uniformity of germination): In this paper, different types of energy treatments viz., magnetic field, gamma irradiation, electric field, laser irradiation, sound energy, healing energy, light and heat energy on germination, seed yield and quality of agriculture and horticulture crops. MECHANISM INVOLVED IN ENERGY TREATMENTPhysical factors import different kind of energy into the cells. It is a kind of energy treatment that stimulates the enzymes and other biochemical reactions that helps in early germination. Imported energy is absorbed by the electrons in different molecules. The absorbed energy may be transformed in another kind of energy (most probably chemical one) and then used for accelerating the seed metabolism. It helps to elucidate the mechanisms of energy exchange in molecules and thus stimulation of plant development. In the case of chemical amelioration the necessary substances are directly inserted into the cell. Whereas in the physical treatment, energy introduced in the cell creates conditions for molecular transformations. Magnetic field energy:Application of magnetic fields of extremely low frequencies positively affects seed germination, shoot development, plant length, fresh weight, fruit production and mean fruit weight (Cakmak et al.,...

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“…Blue light (440 nm) and far red light (660 nm) are selectively applied as an energy source for photosynthesis to enable plant growth (Singh et al ., 2015). Environmental factors such as temperature, soil nutrition, salinity, and drought stress all affect glycosylation, as well as protein qualities and quantities (Jamal et al ., 2009; Kang et al ., 2016).…”

Section: Effect Of Developmental and Environmental Factors On Vaccinementioning

confidence: 99%

Production of Recombinant Anti-Cancer Vaccines in Plants

Lee

2017

Biomolecules & Therapeutics

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Plant expression systems have been developed to produce anti-cancer vaccines. Plants have several advantages as bioreactors for the production of subunit vaccines: they are considered safe, and may be used to produce recombinant proteins at low production cost. However, several technical issues hinder large-scale production of anti-cancer vaccines in plants. The present review covers design strategies to enhance the immunogenicity and therapeutic potency of anti-cancer vaccines, methods to increase vaccine-expressing plant biomass, and challenges facing the production of anti-cancer vaccines in plants. Specifically, the issues such as low expression levels and plant-specific glycosylation are described, along with their potential solutions.

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LEDs for energy efficient greenhouse lighting

Cited by 344 publications

References 52 publications

LED Light Spectrum Affects the Photosynthetic Performance of Houttuynia Cordata Seedlings

LED Light Spectrum Affects the Photosynthetic Performance of Houttuynia Cordata Seedlings

Effect of physical seed treatment on yield and quality of crops: A review

Production of Recombinant Anti-Cancer Vaccines in Plants

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