EFFECTS OF SUPPLEMENTAL UV-A AND UV-C IRRADIATION ON GROWTH, PHOTOSYNTHETIC PIGMENTS AND NUTRITIONAL QUALITY OF PEA SEEDLINGS
A pot cultivation experiment was conducted in a glasshouse to investigate the effects of one-hour supplemental UV-A (365 nm) and UV-C (254 nm) irradiation during night on growth, photosynthetic pigments and nutritional quality of pea seedlings. The results showed that supplemental UV-A did not have any effect on the shoot, root and total biomass of pea seedlings compared with control treatment, while supplemental UV-C significantly decreased shoot and root biomass of pea seedlings. In addition, UV-A did not change photosynthetic pigment content of shoot, but UV-C remarkably reduced photosynthetic pigment contents. Furthermore, supplemental UV-A did not affect vitamin C, nitrate, anthocyanin and flavonoid contents of pea seedling shoot. However, supplemental UV-C notably reduced vitamin C content, but increased flavonoid content, while it did not affect nitrate and anthocyanin contents of pea seedling shoot compared with the control treatment. To sum up, supplemental UV-A irradiation during night had no effect on growth, photosynthetic pigment and nutritional quality of pea seedlings, while supplemental UV-C irradiation inhibited the growth, and decreased photosynthetic pigment content of shoot, also altered shoot nutritional quality of pea seedlings.
Liu, W. and Yang, Q. 2012. EFFECTS OF SUPPLEMENTAL UV-A AND UV-C IRRADIATION ON GROWTH, PHOTOSYNTHETIC PIGMENTS AND NUTRITIONAL QUALITY OF PEA SEEDLINGS. Acta Hort. (ISHS) 956:657-663
UV-A, UV-C, pea seedling, nutritional quality, supplemental lighting