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Nitrogen effects on total flavonoids, chlorogenic acid, and antioxidant activity of the medicinal plant Chrysanthemum morifolium

文献类型： 外文期刊

作者： Liu, Dahui 1 ; Liu, Wei 1 ; Zhu, Duanwei 1 ; Geng, Mingjian 1 ; Zhou, Wenbing 1 ; Yang, Tewu 1 ;

作者机构： 1.Huazhong Agr Univ, Lab Plant Nutr & Ecol Environm Res, Ctr Microelement Res, Key Lab Subtrop Agr & Environm,Minist Agr, Wuhan 430070, Peoples R China

2.Yunnan Acad Agr Sci, Inst Med Plants, Kunming 650231, Peoples R China

关键词： DPPH;Medicinal plant;N fertilizer;Radical;Superoxide

期刊名称：JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE （ 影响因子：2.426； 五年影响因子：3.029 ）

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收录情况： SCI

摘要： Chrysanthemum morifolium (Ramat.) has a long history of cultivation and use as a traditional medicine and tea plant in China. A greenhouse experiment with potted soil-quarz mixture studied the effects of nitrogen supply (0, 56, 112, 167, 224, 334, 501, 556, and 668 mg Nkg~(-1)) on concentrations and ratios of total flavonoids and chlorogenic acid in the flowers of C. morifolium using spectrophotometric and HPLC methods. The antioxidant activity of the flowers was determined as the radical scavenging activities of hydroxyl, superoxide anion, and 2,2-diphenyl-1-picrylhydrazyl hydrate (DPPH) free radicals. A high N supply decreased the concentrations of total flavonoids by 18%-35% and that of chlorogenic acid by 8%-60% compared to a low N-supply rate. At the same time, increasing N supply significantly decreased the antioxidant activity of the flowers. The antioxidant activity of C. morifolium flowers was significantly positively correlated with the concentrations of total flavonoids and chlorogenic acid. We conclude that an N supply in excess of 300 mg (kg soil)~(-1) will negatively affect the antioxidant activity and thereby reduce the quality of C. morifolium flowers.

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