Physiologic and Metabolic Changes in Crepidiastrum denticulatum According to Different Energy Levels of UV-B Radiation

• Published in: International journal of molecular sciences Vol. 21; no. 19; p. 7134
• Main Authors: Park, Song-Yi, Lee, Mee-Youn, Lee, Choong-Hwan, Oh, Myung-Min
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 01.10.2020; MDPI
• Subjects: Acids; antioxidant phenolic compounds; Antioxidants; Antioxidants - metabolism; Asteraceae - metabolism; Bioactive compounds; Biological activity; Biological research; Biology, Experimental; Biosynthesis; Carotenoids; Chlorophyll; Chlorophyll - metabolism; Coumaric Acids - metabolism; Daisies; Dose-Response Relationship, Radiation; Energy; Energy levels; Health aspects; Herbal medicine; Hydrogen peroxide; Hydrogen Peroxide - metabolism; Hydroxycinnamic acid; Light; maximum quantum yield of photosystem II; Medicinal plants; Metabolism; metabolite profiles; Metabolites; Pharmaceutical industry; Photosystem II; Photosystem II Protein Complex - metabolism; physical elicitors; Physiological aspects; Phytochemicals; Pigments; Secondary metabolites; Seedlings; Seedlings - metabolism; Ultraviolet radiation; Ultraviolet Rays; Weight reduction; South Korea; maximum quantum yield of photosystem II; medicinal plants; antioxidant phenolic compounds; metabolite profiles; physical elicitors
• ISSN: 1422-0067; 1661-6596; 1422-0067
• DOI: 10.3390/ijms21197134

Ultraviolet B (UV-B) light, as a physical elicitor, can promote the secondary metabolites biosynthesis in plants. We investigated effects of different energy levels of UV-B radiation on growth and bioactive compounds of . Three-week-old seedlings were grown in a plant factory for 5 weeks. Plants were subjected to different levels of UV-B (0, 0.1, 0.25, 0.5, 1.0, and 1.25 W m ), 6 h a day for 6 days. All UV-B treatments had no negative effect on the shoot dry weight; however, relatively high energy treatments (1.0 and 1.25 W m ) inhibited the shoot fresh weight. UV-B light of 0.1, 0.25, and 0.5 W m did not affect total chlorophyll and H O contents; however, they increased total carotenoid content. On 4 days, 0.25 W m treatment increased antioxidant capacity, total hydroxycinnamic acids (HCAs) content, and several sesquiterpenes. Treatments with 1.0 and 1.25 W m increased total carotenoid, total HCAs, and H O contents, and destroyed chlorophyll pigments, reducing maximum quantum yield of photosystem II and causing visible damage to leaves. Partial least squares discrimination analysis (PLS-DA) showed that secondary metabolites were distinguishably changed according to energy levels of UV-B. The potential of 0.25 W m UV-B for the efficient production of bioactive compounds without growth inhibition in was identified.