title: [Photosynthetic characteristics and chlorophy II fluorescence parameters of different populations of Pinellia ternata].
abstract: OBJECTIVE
  To study the photosynthetic characteristics and chlorophyll fluorescence parameters of Pinellia ternate from different sources, in order to provide basis for cultivation and breeding.
  
  
  METHODS
  Pigment contents were compared among different sources by the Lichtenthaler method. The light-response and diurnal photosynthesis course of P. ternata from different sources were analyzed by LI-6400 system, and chlorophll fluorescence parameters were analyzed by PAM-2100 system.
  
  
  RESULTS
  The difference of photosynthetic characteristics among the sources were remarkable. The light compensation point (LCP) of P. ternate from different sources were 11.57-17.88 micromol x m(-2) x s(-1), the light saturation point (LSP) were 1 000-1 300 micromol x m(-2) x (s-1). All the sources have obvious "midday depression". P. ternate cultivated in Xinjiang showed a higher light saturation point (LSP) and better chlorophyll fluorescence parameters.
  
  
  CONCLUSIONS
  P. ternata cultivated in Xinjiang showed better photosynthetic characteristics and chlorophyll fluorescence parameters than the others.
authors.affiliation: Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210095, China. xiaoyw2005@yahoo.com.cn
authors.forename: Yawen
authors.initials: Y
authors.lastname: Xiao
authors.forename: Kangcai
authors.initials: K
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Yang
authors.forename: Xianhe
authors.initials: X
authors.lastname: Tan
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Xu
mesh_terms: D002681:China; D002734:Chlorophyll / Q000737:chemistry*; D005453:Fluorescence; D008027:Light; D010788:Photosynthesis; D030021:Pinellia / Q000737:chemistry* / Q000502:physiology* / Q000528:radiation effects
chemical_list: D002734:Chlorophyll