Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (9): 1823-1830.DOI: 10.3969/j.issn.1000-2561.2019.09.022

• Agricultural Product Processing, Preservation, Storage, Analysis and Detection • Previous Articles     Next Articles

Amino Acids in Dendrobium SW.

CHEN Yuqin,HU Yongliang,BAI Yanbing,ZHOU Houguang,LI Zesheng()   

  1. Dehong Tropical Agriculture Institute of Yunnan, Ruili, Yunnan 678600, China
  • Received:2018-09-07 Revised:2019-03-07 Online:2019-09-25 Published:2019-09-10
  • Contact: LI Zesheng

Abstract:

The composition and content of amino acids in 22 species Dendrobium were determined by an automatic amino acid analyzer, and multivariate statistics analysis were performed to provide a reference for the quality. The most abundant amino acids were aspartic acid, glutamic acid, leucine and arginine; methionine and cystine were the first and second restricted amino acids in Dendrobium. There was a significant difference in the content of amino acid and the composition. Ten in the 22 species of Dendrobium contained 17 amino acids and 7 essential amino acids. No methionine or cystine was detected in 11 species. D. aurantiacum, D. parishii, D. moschatum, D. crepidatum, D. transparens, D. aurantiacum var. were classified as the richest in amino acids based on the recommendation of FAO/WHO. The amino acids could be divided into four groups by quality with principal component analysis and cluster analysis, and Dendrobium were classified into three categories.

Key words: Dendrobium SW., amino acid, chromatography, principal component analysis, clustering analysis