Light modification by color nets improve quality of lettuce from summer production

Ilić, Slađana; Milenković, Lidija; Dimitrijević, Aleksandra; Stanojević, Ljiljana P.; Cvetković, Dragan; Kevrešan, Žarko; Fallik, Elazar; Mastilović, Jasna

doi:10.1016/j.scienta.2017.09.009

Cited by 54 publications

(31 citation statements)

References 56 publications

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“…This study also combined ambient sunlight with supplemental HPs and LED fixtures, using red and blue LEDs comparable to those used in the current study. Another study published in 2017 compared the differences in growth of one type of green head lettuce grown in the field under different colored shade clothes and did find significant differences between red and blue colors when comparing head weights and diameters [16]. Lettuce diameter is affected by leaf expansion, and the 2017 study observed greater leaf area and larger diameters under red shade cloths.…”

Section: Discussionmentioning

confidence: 97%

Quality, Yield, and Biomass Efficacy of Several Hydroponic Lettuce (Lactuca sativa L.) Cultivars in Response to High Pressure Sodium Lights or Light Emitting Diodes for Greenhouse Supplemental Lighting

2020

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Lettuce is an economically important crop that can be grown either in the field or greenhouse. Different challenges are present in either environment; therefore, cultivar selection is important. For hydroponic greenhouse lettuce there is relatively little published information on cultivar selection under different lighting sources. The objective of phase 1 was to determine the influence of lighting using high pressure sodium (HPS) or light emitting diodes (LED) on plant fresh weight, height, tip burn index, bolting, and Brix. Phase 2 was similar to phase 1 but with fewer cultivars (1) to allow for greater number of replicates per treatment per crop cycle. Each experiment consisted of three crop cycles over time per phase. Light sources were controlled using an algorithm, Light and Shade System Implementation (LASSI), to achieve a constant average daily light integral under each treatment and crop cycle. Electrical consumption and efficacy (fresh weight per kWh) from each treatment was estimated using data collected on power consumption from representative lamps multiplied by the number of fixtures and the hours fixtures were on per crop cycle. In phase 1, the fresh weight of 2 to 3 cultivars was greater under HPS and 1 to 2 cultivars under LED, depending on production cycle. The HPS-grown lettuce tended to have more tip burn and bolting in crop cycles 1 and 2, with cycle 3 showing similar tip burn incidence. Bolting was only consistently observed in one cultivar, ‘Teodore’. The LED array used less than half as much electricity as the HPS array, while producing relatively similar size lettuce, therefore, leading to electrical efficacies two- to three-times higher in LED than in HPS treatments. In phase 2, significant differences in height were found in ‘Greenstar’ and ‘Xandra’, with HPS producing larger plants than LED. Significant differences were also found in diameter in ‘Greenstar’, ‘Xandra’, ‘Locarno’, and ‘Crunchita’, with HPS again being larger than LED.

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Section: Discussionmentioning

confidence: 97%

Quality, Yield, and Biomass Efficacy of Several Hydroponic Lettuce (Lactuca sativa L.) Cultivars in Response to High Pressure Sodium Lights or Light Emitting Diodes for Greenhouse Supplemental Lighting

2020

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“…Lettuce (Lactuca sativa L.) is one of the most produced and consumed leafy vegetables in Serbia, because it is ease acquired and prepared, it is produced throughout the year and has low cost (Ilić et al, 2017a). Lettuce is a high value vegetable, rich in minerals, vitamins and antioxidants (Chatterjee, 2015), usually consumed raw, in fast foods and prepared salads (Mampholo et al, 2016), without any restriction for daily consumption (Kosma et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Lettuce is a high value vegetable, rich in minerals, vitamins and antioxidants (Chatterjee, 2015), usually consumed raw, in fast foods and prepared salads (Mampholo et al, 2016), without any restriction for daily consumption (Kosma et al, 2013). Quality and bioactive compounds in lettuce depend on genotype (Brücková et al, 2016), growing season (Kapoulas et al 2017), light and temperature (Ilić et al, 2017a), nutrients availability (Slamic and Jug, 2016), agronomic practices (Olasupo et al, 2018;Spehia et al, 2018) and time of harvest (Koukounaras et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…High solar radiation, heat stress, drought, desiccating winds, and hail storms are some of the major environmental limitations to optimal productivity and nutritional quality of field-grown lettuce (Ilić et al, 2017a). As a cool-season vegetable lettuce seems to be a model crop studied for responses to light quality and temperature (Mastilović et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…As a cool-season vegetable lettuce seems to be a model crop studied for responses to light quality and temperature (Mastilović et al, 2019). Net houses, has the potential to reduce various biotic and abiotic challenges during summer production (Ilić et al, 2017a). Photo-selective, coloured, shade nets provide diverse mixtures of natural, unmodified light and scattered, spectrally modified light (Ilić and Fallik, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Bioactive constituents of red and green lettuce grown under colour shade nets

Ilić¹,

Milenković²,

Šunić³

et al. 2020

Emir J Food Agric

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The objectives of this study were to investigate the effects of coloured shade-nets (pearl, blue, or red all with a 50% shade index) compared to non-shaded plants on quality traits on the Discoa and ICE 40102 (green-leaf) and Eglantine (red-leaf) lettuce cultivars. Total chlorophyll content depended on the shading and lettuce genotype. The chlorophyll a and b contents were higher in shaded than unshaded plants. The cv. Eglantine had the highest total chlorophylls (637.03 μg∙g-1 F.M.) content. The highest carotenoid content was in leaves of cv. Discoa under pearl nets (208.89 μg∙g-1 F.M). The highest total phenols content (76.70±1.9 mg∙g-1 GAE D.M.) was in cv. Discoa under red shade; the highest flavonoids content was for cvs. Discoa (42.97) and Eglantine (42.91 mg∙g-1 RU D.M.) under blue shade. The blue and pearl shade nets resulted in slightly higher flavonoid contents in lettuce leaves compared to unshaded plants. The cv. Eglantine, under blue shade had the highest antioxidant capacity (EC50 - 0.197 mg∙mL-1). Red lettuce cv. Eglantine could be recommended for production due to its higher antioxidant properties. Generally blue shade can be used to retain antioxidant capacity.

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Morphological and Biochemical Attributes of Potted Acerola as Affected by Shade Conditions

2023

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Light modification by color nets improve quality of lettuce from summer production

Cited by 54 publications

References 56 publications

Quality, Yield, and Biomass Efficacy of Several Hydroponic Lettuce (Lactuca sativa L.) Cultivars in Response to High Pressure Sodium Lights or Light Emitting Diodes for Greenhouse Supplemental Lighting

Quality, Yield, and Biomass Efficacy of Several Hydroponic Lettuce (Lactuca sativa L.) Cultivars in Response to High Pressure Sodium Lights or Light Emitting Diodes for Greenhouse Supplemental Lighting

Bioactive constituents of red and green lettuce grown under colour shade nets

Morphological and Biochemical Attributes of Potted Acerola as Affected by Shade Conditions

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