title: [Effects of S-3307 on photosynthesis of Ligusticum chuanxiong].
abstract: OBJECTIVE
  To study the effects of S-3307 spraying time and density on photosynthetic characteristic of Ligusticum chuanxiong.
  
  
  METHODS
  The photosynthetic characteristic of L. chuanxiong under different S-3307 spraying time and density was studied by plot cultivation experiment.
  
  
  RESULTS
  The content of chlorophyll a and chlorophyll b in leaf increased when the spraying density was 20, 40, 80 mg x L(-1), while the net photosynthetic rate was the maximum. When the spraying density was 160 mg x L(-1), the content of chlorophyll a and chlorophyll as well as net photosynthetic rate were not increased.
  
  
  CONCLUSIONS
  S-3307 spraying can raise the photosynthetic capacity of L. chuanxiong and promote the form of assimilation products.
authors.affiliation: College of Agronomy, Sichuan Agriculture University, Ya'an 625014, China.
authors.forename: Dong-ping
authors.initials: DP
authors.lastname: Zhao
authors.forename: Wen-yu
authors.initials: WY
authors.lastname: Yang
authors.forename: Xing-fu
authors.initials: XF
authors.lastname: Chen
authors.forename: Xiong
authors.initials: X
authors.lastname: Yao
mesh_terms: D002734:Chlorophyll / Q000378:metabolism; D030004:Ligusticum / Q000187:drug effects / Q000378:metabolism*; D010788:Photosynthesis / Q000187:drug effects*; D010937:Plant Growth Regulators / Q000494:pharmacology*
chemical_list: D010937:Plant Growth Regulators; D002734:Chlorophyll