Yunnan is not only the center of tea origination but also the center of tea evolution and variation.There is a broad distribution of Sect.Thea（L.） Dyer in Yunnan.This paper concerns the research progress of Sect.The...Yunnan is not only the center of tea origination but also the center of tea evolution and variation.There is a broad distribution of Sect.Thea（L.） Dyer in Yunnan.This paper concerns the research progress of Sect.Thea（L.） Dyer,reveals the distribution of Sect.Thea（L.） Dyer in Yunnan,and checks out the number and name of Sect.Thea（L.） Dyer in Yunnan,which will offer references for further study and application of tea plants.展开更多
A polysaccharide of Thea sinensis, TSA, has been isolated from the fresh leaves as a major fraction of polysaccharides. The mol. wt. was estimated to be 850,000 with [α]_D^(15)+ 25.5°(c=0.75, H_2O). The componen...A polysaccharide of Thea sinensis, TSA, has been isolated from the fresh leaves as a major fraction of polysaccharides. The mol. wt. was estimated to be 850,000 with [α]_D^(15)+ 25.5°(c=0.75, H_2O). The component sugars were determined as L-rhamnose, L-arabinose, and D-galactose in molar ratio of 0.54: 1.0: 0.94. The O-acetyl groups locating on galactose residues position 2 were also iden- tified and the content was 3.8％. The ^(13)C NMR spectrum and CrO_3 oxidation of TSA indicated the Rhamnose, Arabinose and Galactose to be in α-, α- and β-configurations, respectively. Me- thylation analysis, periodate oxidation, partial hydrolysis and ^(13) C NMR. spectrum showed that TSA. is a branched galactoarabinan.展开更多
连续两年用纸色谱、分光光度法、区带纸电泳—薄层扫描法及 HPLC 法测定了张氏系统中的21种茶组植物新梢中的咖啡碱、可可碱、儿茶素组成、茶氨酸、游离氨基酸总量及幼果中的哌啶-2-羧酸。根据化学、形态学及植物的地理分布等证据,采用...连续两年用纸色谱、分光光度法、区带纸电泳—薄层扫描法及 HPLC 法测定了张氏系统中的21种茶组植物新梢中的咖啡碱、可可碱、儿茶素组成、茶氨酸、游离氨基酸总量及幼果中的哌啶-2-羧酸。根据化学、形态学及植物的地理分布等证据,采用化学分类和数值分类学方法探讨了茶组植物种群的归属和分类。分类结果表明,茶组可分为五室茶 C.quinquelocularea Du et Li.和三室茶 C.trilo cularea Du et Li.两个种。三室茶具有中小叶茶 C.var.micro-midph-yllaea Du et Li.大叶茶 C.macrophyllaea Du et Li.和苦茶 C.var.kuiea Du et Li.3个变种。展开更多
基金Supported by Foundation of Tea Research Institute of Yunnan Acad-emy of Agricultural Science (2009A09-37)~~
文摘Yunnan is not only the center of tea origination but also the center of tea evolution and variation.There is a broad distribution of Sect.Thea（L.） Dyer in Yunnan.This paper concerns the research progress of Sect.Thea（L.） Dyer,reveals the distribution of Sect.Thea（L.） Dyer in Yunnan,and checks out the number and name of Sect.Thea（L.） Dyer in Yunnan,which will offer references for further study and application of tea plants.
文摘A polysaccharide of Thea sinensis, TSA, has been isolated from the fresh leaves as a major fraction of polysaccharides. The mol. wt. was estimated to be 850,000 with [α]_D^(15)+ 25.5°(c=0.75, H_2O). The component sugars were determined as L-rhamnose, L-arabinose, and D-galactose in molar ratio of 0.54: 1.0: 0.94. The O-acetyl groups locating on galactose residues position 2 were also iden- tified and the content was 3.8％. The ^(13)C NMR spectrum and CrO_3 oxidation of TSA indicated the Rhamnose, Arabinose and Galactose to be in α-, α- and β-configurations, respectively. Me- thylation analysis, periodate oxidation, partial hydrolysis and ^(13) C NMR. spectrum showed that TSA. is a branched galactoarabinan.
文摘连续两年用纸色谱、分光光度法、区带纸电泳—薄层扫描法及 HPLC 法测定了张氏系统中的21种茶组植物新梢中的咖啡碱、可可碱、儿茶素组成、茶氨酸、游离氨基酸总量及幼果中的哌啶-2-羧酸。根据化学、形态学及植物的地理分布等证据,采用化学分类和数值分类学方法探讨了茶组植物种群的归属和分类。分类结果表明,茶组可分为五室茶 C.quinquelocularea Du et Li.和三室茶 C.trilo cularea Du et Li.两个种。三室茶具有中小叶茶 C.var.micro-midph-yllaea Du et Li.大叶茶 C.macrophyllaea Du et Li.和苦茶 C.var.kuiea Du et Li.3个变种。
