ABSTRACT
Theaflavins are a category of natural compounds characterized with the benzotropolone skeleton. Theaflavins have many pharmacological actions, such as antioxidant, regulating blood-lipid, hypoglycemic, antiviral, anti-inflammation, hypouricemic, anti-bacterial, anti-tumor, anti-osteoporosis. Theaflavins is one of the research focuses of natural active ingredients in tea, and it is more and more widely used in the development of terminal products with health food, medicine, cosmetics, animal feed, plant pesticide, and so on. Based on the literatures review of theaflavins in recent years, taking the theaflavins structure as the starting point, the biological activities of theaflavins were reviewed, the research and application of theaflavins in health food, medicine and other fields were focused on, in order to provide reference for the application and development of theaflavins.
ABSTRACT
<p><b>OBJECTIVE</b>To analyse a special kind of Schisandra chinensis with the white fruit using ITS2 barcode at molecular levels.</p><p><b>METHOD</b>ITS2 regions were sequenced bidirectionally. Sequence assembly and consensus sequence generation were performed using the CodonCode Aligner, MEGA 5.0 software was used to align the sequences. The ITS2 secondary structure was predicted using ITS2 web server, BLAST 1 method was used to identify the S. chinensis with the white fruit.</p><p><b>RESULT</b>The length of the ITS2 sequence was 231 bp. And the sample was identified as S. chinensis using the method of BLAST 1. Their mean interspecific genetic distance (K2P distance) among the populations of the S. chinensis with the white fruit and S. chinensis was far lower than the mean interspecific genetic distance between the S. chinensis and S. sphenanthera.</p><p><b>CONCLUSION</b>By using ITS2 the S. chinensis with the white fruit was identified as S. chinensis, and the ITS2 barcode could be used to identify S. chinensis and S. sphenanthera.</p>