Effect of natural light on surface temperature and lycopene content of vine ripened tomato fruit

Helyes, Lájos; Lugasi, A.; Pék, Zoltán

doi:10.4141/cjps07022

Cited by 51 publications

(34 citation statements)

References 7 publications

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“…This result is in good agreement with the findings of Ambrózy et al (2016). This phenomenon can be explained by the temperature conditions, as it is well known that supraoptimal temperatures can inhibit carotenoid synthesis in fruits of tomato, an another Solanaceous vegetable (Helyes et al 2007). In this study, a significant negative correlation was found between the ratio of supraoptimal temperature prior to harvest and total carotenoid content (r = -0.90, N = 12, P < 0.001).…”

Section: Total Carotenoid Contentsupporting

confidence: 81%

Effect of coloured shade nets on some nutritional characteristics of a kapia type pepper grown in plastic tunnel

et al. 2016

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Sweet pepper is the most important vegetable crop of the Hungarian greenhouse industry. Production of red coloured cultivars, having very high nutritive value, is getting popular recently. Shading of plastic tunnels is a common practice in Hungary, but research about its effects on the nutritional characteristics of sweet pepper has just started. The objective of this study was to investigate the effect of different shading methods (shading paint, white, green, yellow and red coloured shade nets) on some nutritional characteristics of a red coloured kapia type pepper, under Hungarian climatic conditions cultivated in unheated walk-in plastic tunnels. Shade net colour slightly affected radiation and hence temperature conditions of the tunnels; especially ratio of supra-optimal temperature values (32 °C <) was changed. Dry matter content was not influenced by shading method, in contrary to sampling time which had a significant effect on this parameter. Vitamin C and total polyphenol contents were affected by both of these factors and also by their interaction; shading effect on these phytonutrients changed with harvest times. However, total carotenoid content was affected just by this latter factor. Heat stress, higher ratio of supra-optimal temperature values, increased total polyphenol concentration and decreased total carotenoid content. In overall, white shade net resulted sweet peppers with the best nutritive quality, but harvest time had a more pronounced effect on content of nutritive constituents than shade net colour.

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Section: Total Carotenoid Contentsupporting

confidence: 81%

Effect of coloured shade nets on some nutritional characteristics of a kapia type pepper grown in plastic tunnel

et al. 2016

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“…() and Helyes et al. () even observed a reduction in β ‐carotene and lycopene contents at extremely high radiation intensities.…”

Section: Discussionmentioning

confidence: 93%

The Effect of Constraining the Intensity of Solar Radiation on the Photosynthesis, Growth, Yield and Product Quality of Tomato

Kläring

Krumbein

2013

J Agronomy Crop Science

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Recent studies propose the combination of electrical energy and plant production, in which often only radiation peaks were used for energy production. Then, the effect on plant growth is assumed to be negligible. However, photosynthesis is known to be a monotonically increasing function of radiation. We studied the response of tomato to constraining the intensity of solar radiation. Tomato crops in greenhouse compartments were shaded when the outside photosynthetic photon flux density (PPFD) exceeded 640 and 1280 μmol m−2 s−1, resulting in a 57 % and 34 % reduction in the PPFD integral over the growing period compared to the non‐shaded control. Constraining the intensity of solar radiation significantly reduced photosynthesis, growth and yield of tomato plants. Model‐derived estimates of reduction in crop dry matter increment were 50 % and 28 % for the strongly and moderately PPFD constrained crops. However, measured plant dry matter increment decreased only by 31 % and 19 %, respectively, that is, light use efficiency increased markedly. This indicates a strong adaptation of the plant's metabolism to cope with the limitation in light availability such as increasing the specific leaf area and reducing respiration. Surprisingly, this was only of little concern to the fruit quality, because no effect of constraining PPFD on the concentration of total dry matter, sugars and lycopene in the fruits could be observed. The concentration of titratable acids was significantly increased, however, when constraining PPFD, while ß‐carotene was slightly decreased. When combining plant and energy production, yield reductions in systems that reduce the supply of solar radiation to crops only at high irradiances will be less considerable than in systems that permanently shade the crop. However, yield losses in tomato production remain significant in both system types.

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“…The contents of free amino acid were determined with ninhydrin coloration method according to [12]. The lycopene contents were measured by spectrophotometer according to [13]. The polyphenol contents were determined by the Folin-Ciocalteu procedure according to [14].…”

Section: B Fruit Quality Determinedmentioning

confidence: 99%

Effects of Light Quality on The Quality Formation of Tomato Fruits

Xie¹,

Song²,

Liu³

et al. 2017

Proceedings of the 2016 International Conference on Biological Engineering and Pharmacy (BEP 2016)

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Abstract-The effects of light quality on the quality formation of tomato (cv. MicroTom) fruits were studied in controlled-environment house. There were 4 LEDs treatments: the ratio of red (660nm): blue (460nm) was 1:1 (1R1B), 2:1 (2R1B), 4:1 (4R1B) and 8:1 (1R1B), the Photosynthetic Photon Flux Density (PPFD) was 300µmol· m -1 s -1 and illumination time was 6:00 -18:00, the quality of tomato fruits were determined at 30, 45 and 60 days after anthesis (DAA). The contents of soluble protein, free amino acid, flavonoid and ferric reducing antioxidant potential (FRAP) in tomato fruits significantly increased under the 1R1B treatment with the development of tomato fruits. Under 4R1B treatment, the contents of soluble sugar significantly increased at 30 and 40 DAA, the rate of DPPH free radical scavenging significantly increased at 30 DAA. The polyphenol contents significantly increased at 45 and 60 DAA under 4R1B or 8R1B treatment. The lycopene contents significantly increased at 45 and 60 DAA under 2R1B treatment.

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Effect of natural light on surface temperature and lycopene content of vine ripened tomato fruit

Cited by 51 publications

References 7 publications

Effect of coloured shade nets on some nutritional characteristics of a kapia type pepper grown in plastic tunnel

Effect of coloured shade nets on some nutritional characteristics of a kapia type pepper grown in plastic tunnel

The Effect of Constraining the Intensity of Solar Radiation on the Photosynthesis, Growth, Yield and Product Quality of Tomato

Effects of Light Quality on The Quality Formation of Tomato Fruits

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