Dynamic Changes in Alcohol Soluble Components and Six Kinds of Substances from Dendrobium officinale

Abstract:

In order to understand the changes in chemical constituents of Dendrobium officinale at different growth stage,the contents of alcohol soluble components,polyphenols,flavonoids,terpenoids,organic acids,amino acids,sugars were measured.The results showed that the change trends the 6 kinds of substance contents were consistent with the total amount of alcohol soluble extract in stems.From September 2015 to September 2016,their contents decreased at first,and then increased.However,the dynamic changes in contents of 6 kinds of substances in leaves did not show consistency.Among 6 kinds of substances,the content of saccharide with low molecular weight was the highest,followed by contents of triterpenes and organic acids.And there were significant negative correlation between the total amount of alcohol soluble extract and the content of polysaccharides in the stems,but not in the leaves.These would provide scientific basis for evaluating quality and ensuring harvest time of D.officinale.