title: [Studies on tissue culture of Dendrobium chrysotoxum Lindl in vitro].
abstract: OBJECTIVE
  To set up a system for the culture of Dendrobium chrysotoxum in vitro.
  
  
  METHODS
  Tissue culture, fire fly luminescence and phenol-H2SO4 method.
  
  
  RESULTS
  The embryo could germinate with or without light, the MS, 1/2MS, B5, N6 mediums are suitable to the growth and the differentiation of sprout with light, 0.5 mg.L-1 NAA and 1 mg.L-1 6-BA, and ATP have regular changes, the content of polysaccharide was 2.833% in plant and 7.254% in sprout.
  
  
  CONCLUSIONS
  The light has no effects on the embryo germination, but the phytohormone, nitrogen source and organized elements are important to the growth and differentiation of the sprout which should be transferred to the MS, 1/2MS, B5, N6 mediums in time supplemented with NAA [symbol: see text] 6-BA, ATP may be served as the dynamic indication of nourishment demand in the plant. The content of polysaccharide in the sprout is higher and can be utilized.
authors.affiliation: China Pharmaceutical University, Nanjing 210038, Jiangsu, China.
authors.forename: H
authors.initials: H
authors.lastname: Xu
authors.forename: J
authors.initials: J
authors.lastname: Liu
authors.forename: Z T
authors.initials: ZT
authors.lastname: Wang
authors.forename: D R
authors.initials: DR
authors.lastname: Xu
authors.forename: J Y
authors.initials: JY
authors.lastname: Ding
mesh_terms: D046508:Culture Techniques; D031667:Dendrobium / Q000737:chemistry / Q000254:growth & development*; D010946:Plants, Medicinal / Q000737:chemistry / Q000254:growth & development*; D011134:Polysaccharides / Q000032:analysis
chemical_list: D011134:Polysaccharides