Document Detail

Chemical profiling and gene expression profiling during the manufacturing process of Taiwan oolong tea "Oriental Beauty".
MedLine Citation:
PMID:  17587678     Owner:  NLM     Status:  MEDLINE    
Oriental Beauty, which is made from tea leaves infested by the tea green leafhopper (Jacobiasca formosana) in Taiwan, has a unique aroma like ripe fruits and honey. To determine what occurs in the tea leaves during the oolong tea manufacturing process, the gene expression profiles and the chemical profiles were investigated. Tea samples were prepared from Camellia sinensis var. sinensis cv. Chin-shin Dah-pang while the tea leaves were attacked by the insect. The main volatile compounds, such as linalool-oxides, benzyl alcohol, 2-phenylethanol, and 2,6-dimethylocta-3,7-diene-2,6-diol, increased during manufacture. The gene expression profiles during manufacture were analyzed by differential screening between fresh leaves and tea leaves of the first turn over. Many up-regulated transcripts were found to encode various proteins homologous to stress response proteins. Accordingly, the endogenous contents of abscisic acid and raffinose increased during manufacture. Thus the traditional manufacturing method is a unique process that utilizes plant defense responses to elevate the production of volatile compounds and other metabolites.
Jeong-Yong Cho; Masaharu Mizutani; Bun-ichi Shimizu; Tomomi Kinoshita; Miharu Ogura; Kazuhiko Tokoro; Mu-Lien Lin; Kanzo Sakata
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Bioscience, biotechnology, and biochemistry     Volume:  71     ISSN:  0916-8451     ISO Abbreviation:  Biosci. Biotechnol. Biochem.     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-06-25     Completed Date:  2007-09-26     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9205717     Medline TA:  Biosci Biotechnol Biochem     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  1476-86     Citation Subset:  IM    
Institute for Chemical Research, Kyoto University, Kyoto, Japan.
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MeSH Terms
Food Handling / methods,  standards
Gene Expression Profiling*
Immunity / genetics
Insects / pathogenicity
Plant Leaves / immunology
Tea / genetics*,  immunology,  standards
Up-Regulation / immunology*
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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