title: [Effects of light intensity on physiological and biochemical characteristics of Chrysanthemum morifolium at vegetative stage].
abstract: OBJECTIVE
  To study the effect of light intensity on physiological and biochemical characteristics of Chrysanthemum morifolium at the vegetative stage.
  
  
  METHODS
  The dynamic response of physiological and biochemical indexes of Ch. morifolium were measured under different treatments (100%, 80%, 60%, 40% and 20% of the full sunlight) at the vegetative stage.
  
  
  RESULTS
  The physiological and biochemical indexes of Ch. morifolium showed dynamic changes with the progress of growth and the increase of the treatment time. The soluble sugar content decreased when the light intensity reduced, and had a significant positive correlation with the light intensity. Soluble protein content rose firstly and fell later, malondialdehyde content increased, superoxide dismutase and catalase activity decreased initially and increased afterwards.
  
  
  CONCLUSIONS
  Proper shading benefits the nitrogen accumulation of Ch. morifolium at the vegetative stage, and reduces the strength of stress condition. The suitable light environment for growth of Ch. morifolium at the vegetative stage is about 80%-60% of full sunlight and the optimum treatment time is 20-40 days.
authors.affiliation: Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210095, China. gqs@njau.edu.cn
authors.forename: Qiaosheng
authors.initials: Q
authors.lastname: Guo
authors.forename: Yanru
authors.initials: Y
authors.lastname: Wang
authors.forename: Xianxiu
authors.initials: X
authors.lastname: Zhang
authors.forename: Miao
authors.initials: M
authors.lastname: Jin
mesh_terms: D002374:Catalase / Q000378:metabolism; D031202:Chrysanthemum / Q000502:physiology*; D008027:Light; D015227:Lipid Peroxidation; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D002374:Catalase; D013482:Superoxide Dismutase