Valorization of waste cabbage leaves by postharvest photochemical treatments monitored with a non-destructive fluorescence-based sensor

被引：13

作者：

Kowalski, Artur ^{[1
]}

Agati, Giovanni ^{[2
]}

Grzegorzewska, Maria ^{[1
]}

Kosson, Ryszard ^{[1
]}

Kusznierewicz, Barbara ^{[3
]}

Chmiel, Tomasz ^{[3
]}

Bartoszek, Agnieszka ^{[3
]}

Tuccio, Lorenza ^{[2
]}

Grifoni, Daniele ^{[4
,5
]}

Vagen, Ingunn M. ^{[6
]}

Kaniszewski, Stanislaw ^{[1
]}

机构：

[1] Res Inst Hort, Konstytucji 3 Maja 1-3, Skierniewice, Poland

[2] CNR, Ist Fis Applicata N Carrara, Via Madonna del Piano 10, I-50019 Florence, Italy

[3] Gdansk Univ Technol, Dept Food Chem Technol & Biotechnol, Chem Fac, Gdansk, Poland

[4] Natl Res Council CNR, Inst Bioecon IBE, Via Madonna del Piano 10, I-50019 Sesto Fiorentino Fi, Italy

[5] Lab Monitoring & Environm Modelling Sustainable D, Via Madonna del Piano 10, I-50019 Sesto Fiorentino Fi, Italy

[6] Norwegian Inst Bioecon Res NIBIO, NO-1431 As, Norway

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY | 2021年 / 222卷

关键词：

Brassica oleracea L; Chlorophyll fluorescence; Flavonols; Non-destructive sensors; Postharvest irradiation; Vegetable waste valorisation; UV-B IRRADIATION; CHLOROPHYLL FLUORESCENCE; ULTRAVIOLET-RADIATION; ANTIOXIDANT CAPACITY; PHYSICAL-PROPERTIES; OUTER LEAVES; FLOWER BUDS; ACCUMULATION; L; FLAVONOIDS;

D O I：

10.1016/j.jphotobiol.2021.112263

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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 degrees C along with a white light of about 20 mu mol 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.

引用

页数：11