title: [Relativity among starch quantity, polysaccharides content and total alkaloid content of Dendrobium loddigesii].
abstract: OBJECTIVE
  To find out the relativity among starch quantity, polysaccharides content and total alkaloid content of Dendrobium loddigesii.
  
  
  METHODS
  Microscopy-counting process was applied to starch quantity statistics, sulfuric acid-anthrone colorimetry was used to assay polysaccharides content and bromocresol green colorimetry was used to assay alkaloid content. Pearson product moment correlation analysis, Kendall's rank correlation analysis and Spearman's concordance coefficient analysis were applied to study their relativity.
  
  
  CONCLUSIONS
  Extremely significant positive correlation was found between starch quantity and polysaccharides content, and significant negative correlation between alkaloid content and starch quantity was discovered, as well was between alkaloid content and polysaccharides content.
authors.affiliation: Guangxi Traditional Chinese Medical University, Nanning 530001, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhu
authors.forename: Jianbei
authors.initials: J
authors.lastname: Teng
authors.forename: Yi
authors.initials: Y
authors.lastname: Cai
authors.forename: Jie
authors.initials: J
authors.lastname: Liang
authors.forename: Yilin
authors.initials: Y
authors.lastname: Zhu
authors.forename: Tao
authors.initials: T
authors.lastname: Wei
mesh_terms: D000470:Alkaloids / Q000032:analysis*; D031667:Dendrobium / Q000737:chemistry*; D011134:Polysaccharides / Q000032:analysis*; D013213:Starch / Q000032:analysis*
chemical_list: D000470:Alkaloids; D011134:Polysaccharides; D013213:Starch