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Periodical UV-B radiation hormesis in biosynthesis of kale sprouts nutraceuticals.
Plant Physiol Biochem. 2021 Aug; 165:274-285.PP

Abstract

The objective of the present study was to evaluate the periodical UV-B radiation hormesis during kale seeds germination in their main content of secondary metabolite compounds (phenols; glucosinolates; total antioxidant capacity -TAC-) and their changes during a refrigerated shelf-life. The total UV-B doses received were 0, 5, 10, and 15 kJ m[-2] (CTRL, UVB5, UVB10, and UVB15) in where the 25% was applied on the 3rd, 5th, 7th, and 10th sprouting day. UV radiation did not affect the morphological development of the sprouts. UVB10 and UVB15 treatments increased their phenolic content (>30%). Likewise, TAC was increased by UV-B lighting ~10% (DPPH) and ~20% (FRAP). The hydroxycinnamic acid content in UVB15-treated sprouts increased by 52%, while UVB5 reported an increase of 34% in the kaempferol-3,7-di-O-glucoside concentration, compared to CTRL. After 10 d at 4 °C of shelf-life, content of gallic acid hexoside I and gallic acid increased by 55 and 78% compared to UV-untreated kale sprouts, respectively. Glucoraphanin was the main glucosinolate found in kale sprouts and seeds, followed by 4-hydroxy-glucobrassicin, whose biosynthesis was enhanced by UVB10 (~24 and ~27%) and UVB15 (~36 and ~30%), respectively, compared to CTRL. In conclusion, periodical low UV-B illumination represents a useful tool to stimulate phytochemicals biosynthesis in kale sprouts as an important source of bioactive compounds with potential health benefits.

Authors+Show Affiliations

Department of Agronomical Engineering & Institute of Plant Biotechnology, Universidad Politécnica de Cartagena, Cartagena, Murcia, 30203, Spain.Department of Agronomical Engineering & Institute of Plant Biotechnology, Universidad Politécnica de Cartagena, Cartagena, Murcia, 30203, Spain.Department of Agronomical Engineering & Institute of Plant Biotechnology, Universidad Politécnica de Cartagena, Cartagena, Murcia, 30203, Spain. Electronic address: fr.artes-hdez@upct.es.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

34090151

Citation

Castillejo, Noelia, et al. "Periodical UV-B Radiation Hormesis in Biosynthesis of Kale Sprouts Nutraceuticals." Plant Physiology and Biochemistry : PPB, vol. 165, 2021, pp. 274-285.
Castillejo N, Martínez-Zamora L, Artés-Hernández F. Periodical UV-B radiation hormesis in biosynthesis of kale sprouts nutraceuticals. Plant Physiol Biochem. 2021;165:274-285.
Castillejo, N., Martínez-Zamora, L., & Artés-Hernández, F. (2021). Periodical UV-B radiation hormesis in biosynthesis of kale sprouts nutraceuticals. Plant Physiology and Biochemistry : PPB, 165, 274-285. https://doi.org/10.1016/j.plaphy.2021.05.022
Castillejo N, Martínez-Zamora L, Artés-Hernández F. Periodical UV-B Radiation Hormesis in Biosynthesis of Kale Sprouts Nutraceuticals. Plant Physiol Biochem. 2021;165:274-285. PubMed PMID: 34090151.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Periodical UV-B radiation hormesis in biosynthesis of kale sprouts nutraceuticals. AU - Castillejo,Noelia, AU - Martínez-Zamora,Lorena, AU - Artés-Hernández,Francisco, Y1 - 2021/05/26/ PY - 2021/02/24/received PY - 2021/05/17/accepted PY - 2021/6/6/pubmed PY - 2021/6/16/medline PY - 2021/6/5/entrez KW - Abiotic stresses KW - Antioxidant KW - Brassica oleracea var. sabellica KW - Germination KW - Glucosinolates KW - Phenols KW - Ultraviolet SP - 274 EP - 285 JF - Plant physiology and biochemistry : PPB JO - Plant Physiol Biochem VL - 165 N2 - The objective of the present study was to evaluate the periodical UV-B radiation hormesis during kale seeds germination in their main content of secondary metabolite compounds (phenols; glucosinolates; total antioxidant capacity -TAC-) and their changes during a refrigerated shelf-life. The total UV-B doses received were 0, 5, 10, and 15 kJ m[-2] (CTRL, UVB5, UVB10, and UVB15) in where the 25% was applied on the 3rd, 5th, 7th, and 10th sprouting day. UV radiation did not affect the morphological development of the sprouts. UVB10 and UVB15 treatments increased their phenolic content (>30%). Likewise, TAC was increased by UV-B lighting ~10% (DPPH) and ~20% (FRAP). The hydroxycinnamic acid content in UVB15-treated sprouts increased by 52%, while UVB5 reported an increase of 34% in the kaempferol-3,7-di-O-glucoside concentration, compared to CTRL. After 10 d at 4 °C of shelf-life, content of gallic acid hexoside I and gallic acid increased by 55 and 78% compared to UV-untreated kale sprouts, respectively. Glucoraphanin was the main glucosinolate found in kale sprouts and seeds, followed by 4-hydroxy-glucobrassicin, whose biosynthesis was enhanced by UVB10 (~24 and ~27%) and UVB15 (~36 and ~30%), respectively, compared to CTRL. In conclusion, periodical low UV-B illumination represents a useful tool to stimulate phytochemicals biosynthesis in kale sprouts as an important source of bioactive compounds with potential health benefits. SN - 1873-2690 UR - https://www.unboundmedicine.com/medline/citation/34090151/Periodical_UV_B_radiation_hormesis_in_biosynthesis_of_kale_sprouts_nutraceuticals_ DB - PRIME DP - Unbound Medicine ER -