Effect different spectral LED on photosynthesis and distribution of photosynthate of cherry tomato seedlings

He, Wei; Wang, Xiaoxiao; Min, Pu; Li, Xiaoying; Gan, Longzhan; Xu, Zhiguang

doi:10.1109/ifws.2017.8245979

Cited by 7 publications

(6 citation statements)

References 34 publications

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“…moreover, while HPS technology emits a large range of the SL spectrum between the yellow-orange wavelength, with LEDs, it is possible to optimize the spectral quality for various plants and different physiological processes [9]. Consequently, recent studies have shown that for tomato plants, the best LED SL spectrum for increasing tomato production is red + blue (RB) [10], with about 90-95% of the total radiation on the red (R) wavelength and 5-10% on the blue wavelength (B) [11][12][13]. moreover, when giving a small percentage of green (G) light on the RB background, the SL penetration on plant canopy increases [14].…”

Section: Introductionmentioning

confidence: 99%

Supplemental LED Increases Tomato Yield in Mediterranean Semi-Closed Greenhouse

Palmitessa

Paciello²,

Santamaria

2020

Agronomy

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Supplemental light (SL) is a technique used to increase horticulture yield, especially in northern countries, where the Daily Light Integral (DLI) is a limiting factor during fall and winter, and which could also be used to obtain higher tomato yield at the Mediterranean latitude. In this study, three tomato hybrid (F1) cultivars were grown for year-round production in a commercial semi-closed glasshouse in Southern Italy: two of the cherry fruit-type (‘Juanita’ and ‘Sorentyno’) and one mini plum fruit-type (‘Solarino’). From 120 to 243 days after transplant, light-emitting diode (LED) toplights were used as SL, with a photoperiod of 18 h. The main climatic parameters inside and outside the glasshouse were recorded, and tomato plants’ development and yield were examined. Plants grown with LEDs had longer stems as compared to control treatment (9.53 vs. 8.79 m), a higher stem thickness and yielded more trusses. On average, the yield was 21.7% higher with LEDs. ‘Sorentyno’ was the cultivar with the highest cumulated productivity when it was grown under SL. However, the cultivar with best light use efficiency under LEDs was ‘Solarino’. Therefore, supplemental LED from mid-December until March enhanced tomato growth and yield, opening a favorable scenario for large-scale application of this technology also in the Mediterranean area.

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Section: Introductionmentioning

confidence: 99%

Supplemental LED Increases Tomato Yield in Mediterranean Semi-Closed Greenhouse

Palmitessa

Paciello²,

Santamaria

2020

Agronomy

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“…This increase in plant dry weight was mainly related to differences in light absorption, which in turn were mainly due to differences in leaf area Figure 2C rather than other morphological parameters. The combination of B and R LED lighting increased total dry matter [27], photosynthetic pigment content, stomata number, and reasonable photosynthate distribution in cherry tomato seedlings [28].…”

Section: Morphological Analysis and Biometrical Parametersmentioning

confidence: 90%

The Efficiency of LED Irradiation for Cultivating High-Quality Tomato Seedlings

et al. 2021

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Light qualities are considered to affect many plant physiological processes during growth and development. To investigate how light qualities make an influence on tomato seedlings under greenhouse conditions, the growth and morphological parameters of tomato seedlings (Fortizia F1RC hybrid) were studied under three supplemental light irradiations such as light-emitting diodes with nanoparticle coating (LED 1—Red light-emitting diodes); Blue, Green, Yellow, Red light-emitting diodes (LED 2), and traditional high-pressure sodium (HPS) lamps with different photosynthetic photon flux density and the same irradiation time for 33 days. Morphological appearances of three groups of tomato seedlings were different between light treatments, that is, the plants under LED-1 and LED-2 were shorter than those under HPS, while stem diameter, leaf area, dry and fresh weights, and health indices of tomato seedlings grown under alternative light sources were higher than of those cultivated under traditional HPS lights. However, the higher plant height was in plants containing traditional high-pressure sodium lamps treatment. Photosynthetic pigments were shown to have a significant difference under respective light irradiations of LEDs. The levels of photosynthetic pigments were higher in the leaves of seedlings under LED 1 and LED 2, and lower in those that underwent HPS control treatment. Based on the data of morphological and statistical analysis, LEDs with nanoparticle coating proved to be beneficial factors for the growth of tomato seedlings under greenhouse conditions.

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“…The combination of B and R LED lighting increased total dry matter [21], photosynthetic pigment content, stomata number, and reasonable photosynthate distribution in cherry tomato seedlings [23]. The best effects on tomato growth and physiology with R + B LED were obtained when the LED spectra was composed of 75 to 95% R and 25 to 5% B [20][21][22][23][24]. However, other photons, outside the photosynthetically active radiation (PAR) spectrum, increase leaf photochemical efficiency: FR photons (701-730 nm) [25].…”

Section: Led and Light Spectramentioning

confidence: 92%

“…Finally, monochromatic R light reduced the leaf number before differentiation of the first truss, and this could reduce the time from transplant to the first fruit harvest [22]. The combination of B and R LED lighting increased total dry matter [21], photosynthetic pigment content, stomata number, and reasonable photosynthate distribution in cherry tomato seedlings [23]. The best effects on tomato growth and physiology with R + B LED were obtained when the LED spectra was composed of 75 to 95% R and 25 to 5% B [20][21][22][23][24].…”

Section: Led and Light Spectramentioning

confidence: 96%

Applications and Development of LEDs as Supplementary Lighting for Tomato at Different Latitudes

2021

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High-tech greenhouses and artificial light applications aim to improve food production, in line with one of the sustainable development goals of the UN Agenda 2030, namely, “zero hunger”. In the past, the incandescent lamps have been used for supplementary lighting (SL) at higher latitudes to increase greenhouse production during the dark season. Light-emitting diodes (LED) have been replacing gas discharge and incandescent lamps, and their development is expanding SL applications in different agricultural scenarios (e.g., urban farming, middle latitudes). In fact, recent research on LED applications in Mediterranean greenhouses have produced encouraging results. Since middle latitudes have a higher daily light integral (DLI) than higher latitudes in the dark season and climate conditions influence the installed power load of greenhouses, LED installation and management in Mediterranean greenhouses should be different and less expensive in terms of investment and energy consumption. Accordingly, the aim of this review is to outline the state of the art in LED applications and development, with a focus on latitude-related requirements. Tomato was used as a representative crop.

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Effect different spectral LED on photosynthesis and distribution of photosynthate of cherry tomato seedlings

Cited by 7 publications

References 34 publications

Supplemental LED Increases Tomato Yield in Mediterranean Semi-Closed Greenhouse

Supplemental LED Increases Tomato Yield in Mediterranean Semi-Closed Greenhouse

The Efficiency of LED Irradiation for Cultivating High-Quality Tomato Seedlings

Applications and Development of LEDs as Supplementary Lighting for Tomato at Different Latitudes

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