Effect of shading and high temperature amplitude in greenhouse on growth, photosynthesis, yield and phenolic contents of tomato (Lycopersicum esculentum Mill.)

Angmo, Phunchok; Phuntsog, Nawang; Namgail, Desyong; Chaurasia, O. P.; Stobdan, Tsering

doi:10.1007/s12298-021-01032-z

Cited by 30 publications

(22 citation statements)

References 37 publications

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“…Consequently, the reduction in the fruit number induced by shading did not affect the weight of the fruit (Table 3). Total, marketable, and unmarketable fruits weight (kg pl −1 ) did not show significant differences in shaded plants compared to the control, in contrast to the findings of Angmo et al [42], who reported an increase in total marketable fruit weight in the open field compared to shaded conditions, which could be attributed to different environmental conditions, genetic material, and cultural practices [43][44][45]. In the present experiment, we adopted a processing tomato cultivar that was neither tied nor defoliated, in contrast to the methods used by the authors mentioned above, and in part, could have determined different production responses.…”

Section: Yield and Yield Parameterscontrasting

confidence: 98%

“…From a physiological point of view, the increase in fruit size depends on the enlargement of the pericarp due to the production of new cells during the anthesis process and the growth and expansion of cells that last until the fruit ripening [2]. According to Angmo et al [42], compared to the control, we observed an average increase in the equatorial and polar diameter of fruits of 8.60 and 10.50%, respectively, when grown under shading nets (Table 4). The larger fruit size recorded under shading nets accounted for the higher average marketable fruit weight (Table 3), attributed to the higher water content in the fruit (lower dry matter) that resulted in a dilution effect on TSS (Table 4).…”

Section: Quality Attributes Of Fruitsmentioning

confidence: 99%

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Pearl Grey Shading Net Boosts the Accumulation of Total Carotenoids and Phenolic Compounds That Accentuate the Antioxidant Activity of Processing Tomato

et al. 2021

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Tomato (Solanum lycopersicum L.) is one of the most consumed vegetables worldwide due to its low caloric intake and high fiber, minerals, and phenolic compounds, making it a high-quality functional food. However, fruit quality attributes can be affected by pre-harvest factors, especially environmental stresses. This research aimed to evaluate the influence of two shading nets (white net −30% and pearl grey net −40% shading degree) on the yield and phytochemical profile of tomato fruits grown in summer under the Mediterranean climate. Mineral and organic acid content (by ion chromatography-IC), phenolic profile (by ultra-high performance liquid chromatography-UHPLC coupled with an Orbitrap high-resolution mass spectrometry-HRMS), carotenoid content (by high-performance liquid chromatography with diode array detection-HPLC-DAD), and antioxidant activities DPPH, ABTS, and FRAP (by UV-VIS spectrophotometry) were determined. Tomato fruits grown under the pearl grey net recorded the highest values of total phenolic compounds (14,997 µg 100 g−1 of fresh weight) and antioxidant activities DPPH, ABTS, and FRAP, without affecting either fruit color or marketable yield. The reduction of solar radiation through pearl grey nets proved to be an excellent tool to increase the phytochemical quality of tomato fruits during summer cultivation in a Mediterranean environment.

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Section: Yield and Yield Parameterscontrasting

confidence: 98%

Section: Quality Attributes Of Fruitsmentioning

confidence: 99%

Pearl Grey Shading Net Boosts the Accumulation of Total Carotenoids and Phenolic Compounds That Accentuate the Antioxidant Activity of Processing Tomato

et al. 2021

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“…Our results are similar to previous study on plant where an extensive range of related phenolic compounds and avonoids were found to be produced against the stressful conditions (Rozema et al, 1997). In general, higher UV-B radiation activates phenolic and avonoids synthesis (Angmo et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Comparative effect of environment on morphological, biochemical and phytochemical analysis of onion cultivated at high and low altitudes

Shukla

Rawat

Kumar

et al. 2023

Preprint

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Long harsh winter at the high-altitude reduces the cropping season to few months. So availability of fresh food is a major challenge at the high-altitude. Moreover vegetables imported from other regions (i.e., low-altitudes) may degrade in the nutritional quality, due to the long-transportation and logistic constrains. Keeping a view on the health-promoting qualities of onion (Allium cepa L.); the morphological, biochemical, and phytochemical profiling was studied in onion grown at high-altitude (3340 metres above mean sea level, Leh-Ladakh, India) with the lower-altitude (321 metres above mean sea level, Chandigarh, India). Higher-altitude cultivation resulted in better yield (32.55 ± 1.33 t/ha). Total soluble solid (10.62 ± 0.08 0B), crude protein (6.86 ± 0.10 g/100g), crude fat (0.17 ± 0.01 g/100g), total carbohydrate (93.78 ± 0.67 µg/g), nitrate (180.54 ± 7.77 mg/kg), sulphate (202.77 ± 2.95 mg/kg), nitrogen (1098.03 ± 15.26 mg/100g), sodium (97.05 ± 2.63 mg/100) and manganese (3.91 ± 0.05 mg/100g) contents were found higher at high-altitude whereas, phosphate (1058.27 ± 17.6 mg/kg), magnesium (150.68 ± 0.84 mg/100g), zinc (2.63 ± 0.04 mg/100g)), copper (2.32 ± 0.13 mg/100g)) and iron (16.56 ± 0.24 mg/100g) contents were found higher at low-altitude. Total phenolic (TPC) (5.93 ± 0.06 µg/mg), total flavonoid (TFC) (10.52 ± 0.13 µg/mg), quercetin (0.43 ± 0.01 µg/mg), anti-oxidant potential as indicated by ferric-reducing antioxidant power (FRAP) (42.27 ± 0.10 µg/mg) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) (43.22 ± 0.14%) content were higher in high-altitude grown onion bulbs. The high-altitude grown bulbs were found more effective in vegetative growth, yield and health promoting biochemical and phytochemical compound in comparison with low-altitude grown bulbs.

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“…Aside from reducing the temperature, shading has been observed to present other important bene ts for the crop. These bene ts are related to the increase in the quality and quantity of production, the decrease of disease and pest activity, the better management of natural resources such as water, due to the lower evaporation under the shade, while at the same time, the reduced evaporation leads to the better assimilation of CO 2 , due to the increased stomatal resistance (Angmo et al 2021).…”

Section: Introductionmentioning

confidence: 99%

An Algorithm for Calculating the Shade Created by Greenhouse Integrated Photovoltaics

Petrakis

Thomopoulos

Kavga

et al. 2023

Preprint

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The integration of photovoltaic modules into greenhouse roofs is a novel and intriguing method. Harnessing solar radiation is key to ensuring optimal crop growth, as photosynthesis relies on it. Furthermore, capturing solar radiation by employing photovoltaic systems allows energy production. Given its substantial significance in both energy generation and agriculture, this emphasizes the crucial function that solar radiation plays in these two industries. Greenhouses offer a unique opportunity to optimize both plant growth and energy generation, thereby increasing their overall worth. This approach is especially beneficial considering the growing need for land and the accompanying spatial and economic complexities. The installation of photovoltaics on the greenhouse roof has a significant impact on shading, which can be advantageous or disadvantageous, depending on the season, the crop, and the growth stage. As a result, estimating the shading in the greenhouse is imperative. In this paper, an algorithm for precisely measuring the shadowed surface area generated by solar panels within a greenhouse was developed and presented. This method also reliably determines the percentage of coverage on the whole greenhouse unit throughout the year using a time step of 10 minutes. For greenhouse operators wishing to optimize the potential of their solar panel installations, this streamlined solution provides clear and persuasive statistics.

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Effect of shading and high temperature amplitude in greenhouse on growth, photosynthesis, yield and phenolic contents of tomato (Lycopersicum esculentum Mill.)

Cited by 30 publications

References 37 publications

Pearl Grey Shading Net Boosts the Accumulation of Total Carotenoids and Phenolic Compounds That Accentuate the Antioxidant Activity of Processing Tomato

Pearl Grey Shading Net Boosts the Accumulation of Total Carotenoids and Phenolic Compounds That Accentuate the Antioxidant Activity of Processing Tomato

Comparative effect of environment on morphological, biochemical and phytochemical analysis of onion cultivated at high and low altitudes

An Algorithm for Calculating the Shade Created by Greenhouse Integrated Photovoltaics

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