title: The changes in quality ingredients of Qi chrysanthemum flowers treated with elevated UV-B radiation at different growth stages.
abstract: The paper mainly reported the changes in quality ingredients of Qi chrysanthemum flowers treated with elevated UV-B radiation at different growth stages. The experiment included two levels of UV-B radiation (ambient UV-B, a 10% increase in ambient UV-B). Elevated UV-B radiation was carried out for 10-days during seedling, vigorous growth, bud and flower stages of Qi chrysanthemum, respectively. Elevated UV-B treatments applied during four development stages did not significantly affect flower yield, the rate of superoxide radical production and malondialdehyde concentration in flowers, while increased free amino acid concentration. The amino acid concentration induced by elevated UV-B radiation applied during bud stage was higher than that during the other stages. Elevated UV-B radiation applied during vigorous growth (except for flavone), bud and flower stages of chrysanthemum significantly increased hydrogen peroxide concentration, phenylalanine ammonia lyase enzyme activity, vitamin C, chlorogenic acid and flavone concentrations in flowers. These results suggested that active and nutritional ingredients in flowers of chrysanthemum could be increased by elevated UV-B radiation applied during the later growth stages of chrysanthemum. The paper supplied a simple and environmental-friendly method to improve quality of medicinal plants.
authors: The College of Life Sciences, Hebei University, Baoding 071002, China. Electronic address: yaoxiao301@126.com.
authors: Xiaoqin
authors: X
authors: Yao
authors: The College of Life Sciences, Hebei University, Baoding 071002, China.
authors: Jianzhou
authors: J
authors: Chu
authors: The College of Life Sciences, Hebei University, Baoding 071002, China.
authors: Xueli
authors: X
authors: He
authors: The College of Life Sciences, Hebei University, Baoding 071002, China.
authors: Chunhui
authors: C
authors: Ma
authors: Department of Biological Science, Handan College, Handan 056005, China.
authors: Chao
authors: C
authors: Han
authors: Department of Biological Science, Handan College, Handan 056005, China.
authors: Haiyu
authors: H
authors: Shen
mesh_terms: D000596:Amino Acids / Q000378:metabolism; D001205:Ascorbic Acid / Q000378:metabolism; D002726:Chlorogenic Acid / Q000378:metabolism; D031202:Chrysanthemum / Q000254:growth & development* / Q000378:metabolism / Q000528:radiation effects*; D047309:Flavones / Q000378:metabolism; D035264:Flowers / Q000378:metabolism / Q000528:radiation effects*; D006861:Hydrogen Peroxide / Q000378:metabolism; D008315:Malondialdehyde / Q000378:metabolism; D010650:Phenylalanine Ammonia-Lyase / Q000378:metabolism; D010946:Plants, Medicinal / Q000528:radiation effects; D019413:Qi; D013481:Superoxides / Q000378:metabolism; D014466:Ultraviolet Rays
chemical_list: D000596:Amino Acids; D047309:Flavones; D013481:Superoxides; D002726:Chlorogenic Acid; D008315:Malondialdehyde; D006861:Hydrogen Peroxide; D010650:Phenylalanine Ammonia-Lyase; D001205:Ascorbic Acid; C043562:flavone