Comparison of Polysaccharide and Dendrobine Content in Hejiang Dendrobium nobile at Different Harvesting Time
10.6039/j.issn.1001-0408.2018.01.19
- VernacularTitle:合江金钗石斛在不同采收期时多糖和石斛碱含量的比较
- Author:
Shou YAN
1
;
Tingmei ZHAO
;
Xueqin ZHANG
;
Jiayi XING
;
Yadong HU
;
Ze CHUN
Author Information
1. 中国科学院成都生物研究所农业生物技术研究中心
- Keywords:
Hejiang;
Dendrobium nobile;
Polysaccharide;
Dendrobine;
Drying rate;
Gas chromatography;
Harvesting month;
Growth years
- From:
China Pharmacy
2018;29(1):73-77
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To determine quality indexes of Hejiang Dendrobium nobile at different harvesting time and months,and to provide scientific reference for reasonable harvesting period of Hejiang D.nobile.METHODS:The stem of annual,biennial and triennial D.nobile were collected.The drying rate,the contents of polysaccharides (colorimetry),dendrobine (GC) and total alkaloids (colorimetry),effective component total rate (dendrobine×drying rate) were measured.Biennial D.nobile were collected in autumn and winter (Oct.of the second year-Mar.of the third year,15th day a month) to determine drying rate,the contents of polysaccharides and dendrobine.RESULTS:The drying rate,the contents of polysaccharides and effective component total rate were higher than annual and triennial D.nobile.The content of total alkaloids and dendrobine were in descending order:annual D.nobile (0.52％,0.48％) ＞biennial D.nobile(0.48％,0.44％) ＞triennial D.nobile (0.32％,0.22％).From Oct.of the second year to Mar.of the third year,the drying rate of biennial D.nobile was increasing month by month;the contents of polysaccharides and dendrobine increased firstly and then decreased;the content of polysaccharide was the highest in Feb.(17.32％),and the content of dendrobine reached the highest level in Dec.(0.51％).CONCLUSIONS:The optimal harvesting period is biennial Hejiang D.nobile in Dec.and Jan.(third years before flowering),considering flowering characteristics,drying rate,the contents of polysaccharide and dendrobine.
