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

Ilić, Zoran S.; Milenković, Lidija; Šunić, Ljubomir; Barać, S.; Cvetković, Dragan; Stanojevic, Jelená́; Kevrešan, Žarko; Mastilović, Jasna

doi:10.9755/ejfa.2019.v31.i12.2043

Cited by 5 publications

(7 citation statements)

References 27 publications

(37 reference statements)

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“…Among colored shade nets, pearl had the greatest DLI for both seasons. The greater DLI for pearl shade nets is consistent with the manufacturer descriptions, which indicate a design to minimize the absorption of visible light and instead transmit direct radiation into diffuse or scattered light (Ilic et al 2019;Shahak et al 2008). Gaurav (2014) also found that pearl shade net had the greatest light intensity compared with red and black shade nets.…”

Section: Discussionsupporting

confidence: 60%

Shade Nets Reduced Growth, Nutrition, and Sugars of Hydroponic Lettuce and Basil

Singh,

Dunn,

Fontanier

et al. 2023

horts

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Colored shade nets are known to alter the light quality and quantity and thus can influence plant growth and nutritional quality of crops. Lettuce (‘Lollo Antonet’ and ‘Green Forest’) and basil (‘Aroma-2’ and ‘Genovese’) were grown in ebb-and-flow hydroponic tables for 4 weeks. Colored shade nets of aluminet, black, pearl, and red with 50% shading intensity along with a control (no-shade) were used in this experiment. Data for plant growth and leaf quality attributes were collected at harvest time. The no-shade treatment showed increased shoot fresh and dry weight, sugar, and relative chlorophyll content in both lettuce and basil cultivars, whereas plant height and net photosynthesis rates were increased under aluminet, pearl, and red nets. In basil, calcium and sulfur were greatest under no-shade, whereas zinc and copper were greatest under aluminet. Zinc, iron, calcium, magnesium, and manganese concentrations were greatest under no-shade in lettuce. The pearl-colored net increased leaf soluble solids content. No-shade produced the greatest starch values in basil, whereas pearl shade net produced the greatest starch in ‘Lollo Antonet’ in the fall. Light spectra varied with shade net resulting in 90%, 65%, 50%, 30%, and 70% of incident light occurring between 400 and 700 nm for no-shade, pearl, aluminet, black, and red shade nets, respectively. Overall, lettuce and basil plants under no-shade (daily light integral of 20 to 24 mol·m−2·d−1 and temperature of 26 to 30 °C) had increased plant growth and leaf quality in late spring and fall, compared with colored shade nets.

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Section: Discussionsupporting

confidence: 60%

Shade Nets Reduced Growth, Nutrition, and Sugars of Hydroponic Lettuce and Basil

Singh,

Dunn,

Fontanier

et al. 2023

horts

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“…One of the reasons for the lack of correlation between flavonoids and EC 50 value can be attributed to secondary metabolites that could not be detected in this study, such as antioxidant vitamins (vit C and E), carotenoids, quercetin, tannins, etc. [29]. Higher content of total phenol compounds resulted in higher antioxidant activity indicating a higher correlation for TP content (R 2 = 0.774) (Figure 2).…”

Section: Total Antioxidant Capacity (Tac)mentioning

confidence: 94%

“…The content of total phenols was determined in herb extracts by the Folin-Ciocalteu procedure [25][26][27][28][29] using gallic acid as a standard (the concentration range 0.00625 to 0.2 mg/mL). The results are expressed as gallic acid equivalents per gram of dry extract (mg GAE g −1 d.e.…”

Section: Determination Of Content Of Total Phenols In Extractsmentioning

confidence: 99%

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Shading of Medical Plants Affects the Phytochemical Quality of Herbal Extracts

Tmušić¹,

Ilić²,

Milenković³

et al. 2021

Horticulturae

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The manipulation of light intensity by shade nets can lead to exchanges in the phytochemical quality and antioxidants ofsome herbs. This study aimed to determine whether shading by pearl nets (50% shade index) could improve the bioactive compounds in several medicinal herbs such as thyme (Thymus vulgaris L.), marjoram (Origanum majorana L.), oregano (Origanum vulgare L.), lemon balm (Melissa officinalis L.), and peppermint (Mentha piperita L.), and their correspondingherbal extracts during a four-week maceration process in ethanol. Oregano and thyme provided the highest yield of total extractive substances (TES) from both shaded and non-shaded plants. Among all studied herbs, the highest level of antioxidants, expressed as total phenolic content (TPC) was found in extracts from shaded plants of lemon balm. Herbal extracts produced from non-shaded thyme and marjoram had higher flavonoid contents compared to herbal extracts from shaded plants. Accumulation of the investigated secondary metabolites depends more on the specificity of a plant species rather than light intensity. This study was an initial step in the production of medicinal plants with an increased quantity of antioxidant and other bioactive compounds during the maceration process in extracts, aimed to be used as natural alcoholic productwith added value.

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“…Koristi se gotovo cijele godine zbog postojanja varijeteta koji se mogu uspješno proizvoditi tijekom različitih sezona (Zdravković et al, 2014). Posljednjih godina povrćari su usavršili tehnologiju ljetne proizvodnje salate uz primjenu fotoselektivnih mreža (Ilić et al, 2019).…”

Section: Uvodunclassified

Utjecaj malčiranja na kontrolu korova i agronomska svojstva salate

et al. 2020

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Istraživanja su imala za cilj odrediti značaj utjecaja zastiranja tla različitim vrstama malča na kontrolu korova, prinos i kvalitetu dvije sorte salate (Lactuca sativa var. capitata) ‘Mafalda’ i ‘Bataille. Primjena zastiranja se odražava na povećanje temperature tla, Ispod crne polietilenske folije temperature tla je bila za 2˚С viša u usporedbi s temperaturom ispod bijelo/crne folije i agrotekstila, i za 3-5˚С u odnosu na zastiranje organskim malčem (karton, slama, piljevina, kompost) i kontrolu (ne malčirano tlo). U suzbijanju korovnih vrsta, polietilenske folije su pokazale mnogo veću učinkovitost (95,1-97,8 %) u usporedbi s organskim malčem. Najveća prisutnost korova bila je na malču sa slamom (46 biljaka/m²) u usporedbi s kontrolom (23 biljaka/m²). Pri malčiranju kompostom prinos je bio značajno do vrlo značajno veći (‘Bataille’- 4,64 kg/m² ; Mafalda’ 4,98 kg/m²) u odnosu na ostale tretmane. Malčiranje slamom kod sorte ‘Bataille’ doprinijelo je smanjenom prinosu (2,80 kg/m²). Malčiranje kompostom i crnom polietilenskom folijom utječe na značajno povećanje mase po biljci i indeks lisne površine, kao osnovnih parametara prinosa. Sorta ‘Mafalda’ je u uvjetima zastiranja pokazala veću otpornost na fiziološke poremećaje u usporedbi sa sortom ‘Bataille’.

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

Cited by 5 publications

References 27 publications

Shade Nets Reduced Growth, Nutrition, and Sugars of Hydroponic Lettuce and Basil

Shade Nets Reduced Growth, Nutrition, and Sugars of Hydroponic Lettuce and Basil

Shading of Medical Plants Affects the Phytochemical Quality of Herbal Extracts

Utjecaj malčiranja na kontrolu korova i agronomska svojstva salate

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