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Valorization of waste cabbage leaves by postharvest photochemical treatments monitored with a non-destructive fluorescence-based sensor
Abstract
The biosynthesis of polyphenolic compounds in cabbage waste, outer green leaves of white head cabbage (Brassica oleracea L. var. capitata subvar. alba), was stimulated by postharvest irradiation with UVB lamps or sunlight. Both treatments boosted the content of kaempferol and quercetin glycosides, especially in the basal leaf zone, as determined by the HPLC analysis of leaf extracts and by a non-destructive optical sensor. The destructive analysis of samples irradiated by the sun for 6 days at the end of October 2015 in Skierniewice (Poland) showed an increase of leaf flavonols by 82% with respect to controls. The treatment by a broadband UVB fluorescent lamp, with irradiance of 0.38 W m−2 in the 290–315 nm range (and 0.59 W m−2 in the UVA region) for 12 h per day at 17 °C along with a white light of about 20 μmol m−2 s−1, produced a flavonols increase of 58% with respect to controls. The kinetics of flavonols accumulation in response to the photochemical treatments was monitored with the FLAV non-destructive index. The initial FLAV rate under the sun was proportional to the daily radiation doses with a better correlation for the sun global irradiance (R2 = 0.973), followed by the UVA (R2 = 0.965) and UVB (R2 = 0.899) irradiance. The sunlight turned out to be more efficient than the UVB lamp in increasing the flavonols level of waste leaves, because of a significant role played by UVA and visible solar radiation in the regulation of the flavonoid accumulation in cabbage. The FLAV index increase induced on the adaxial leaf side was accompanied by a lower but still significant FLAV increase on the unirradiated abaxial side, likely due to a systemic signaling by mean of the long-distance movement of macromolecules. Our present investigation provides useful data for the optimization of postharvest photochemical protocols of cabbage waste valorization. It can represent a novel and alternative tool of vegetable waste management for the recovery of beneficial phytochemicals.
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Authors (11)
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Artur Kowalski
- Research Institute of Horticulture, Konstytucji 3 Maja 1/3, Skierniewice, Poland
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Giovanni Agati
- Istituto di Fisica Applicata ‘N. Carrara’ – CNR, Via Madonna del Piano, 10-50019 Sesto Fiorentino (Florence), Italy
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Maria Grzegorzewska
- Research Institute of Horticulture, Konstytucji 3 Maja 1/3, Skierniewice, Poland
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Ryszard Kosson
- Research Institute of Horticulture, Konstytucji 3 Maja 1/3, Skierniewice, Poland
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Tomasz Chmiel
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Lorenza Tuccio
- Istituto di Fisica Applicata ‘N. Carrara’ – CNR, Via Madonna del Piano, 10-50019 Sesto Fiorentino (Florence), Italy
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Daniele Grifoni
- Institute of Bioeconomy (IBE), National Research Council (CNR), Via Madonna del Piano 10, 50019, Sesto Fiorentino (FI), Italy
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Ingunn M. Vagen
- Norwegian Institute of Bioeconomy Research – NIBIO, NO-1431 Ås, Norway
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Stanislaw Kaniszewski
- Research Institute of Horticulture, Konstytucji 3 Maja 1/3, Skierniewice, Poland
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Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
no. 222,
ISSN: 1011-1344 - Language:
- English
- Publication year:
- 2021
- Bibliographic description:
- Kowalski A., Agati G., Grzegorzewska M., Kosson R., Kusznierewicz B., Chmiel T., Bartoszek-Pączkowska A., Tuccio L., Grifoni D., Vagen I. M., Kaniszewski S.: Valorization of waste cabbage leaves by postharvest photochemical treatments monitored with a non-destructive fluorescence-based sensor// JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY -Vol. 222, (2021), s.112263-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jphotobiol.2021.112263
- Verified by:
- Gdańsk University of Technology
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