Analysis of transcripts in methyl jasmonate-treated ginseng hairy roots to identify genes involved in the biosynthesis of ginsenosides and other secondary metabolites

Methyl jasmonate (MeJA) treatment increases the levels of plant secondary metabolites, including ginsenosides, which are considered to be the main active compounds in ginseng (Panax ginseng C.A. Meyer). To create a ginseng gene resource that contains the genes involved in the biosynthesis of seconda...

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Veröffentlicht in:Plant cell reports 2005, Vol.23 (8), p.557-566
Hauptverfasser: Choi, D.W, Jung, J.D, Ha, Y.I, Park, H.W, In, D.S, Chung, H.J, Liu, J.R
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container_issue 8
container_start_page 557
container_title Plant cell reports
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creator Choi, D.W
Jung, J.D
Ha, Y.I
Park, H.W
In, D.S
Chung, H.J
Liu, J.R
description Methyl jasmonate (MeJA) treatment increases the levels of plant secondary metabolites, including ginsenosides, which are considered to be the main active compounds in ginseng (Panax ginseng C.A. Meyer). To create a ginseng gene resource that contains the genes involved in the biosynthesis of secondary metabolites, including ginsenosides, we generated 3,134 expression sequence tags (ESTs) from MeJA-treated ginseng hairy roots. These ESTs assembled into 370 clusters and 1,680 singletons. Genes yielding highly abundant transcripts were those encoding proteins involved in fatty acid desaturation, the defense response, and the biosynthesis of secondary metabolites. Analysis of the latter group revealed a number of genes that may be involved in the biosynthesis of ginsenosides, namely, oxidosqualene cyclase (OSC), cytochrome P450, and glycosyltransferase. A novel OSC gene was also identified by this analysis. RNA gel blot analysis confirmed that transcription of this OSC gene, along with squalene synthase (SS) and squalene epoxidase (SE) gene transcription, is increased by MeJA treatment. This ginseng EST data set will also provide important information on the genes that are involved in the biosynthesis of other secondary metabolites and the genes that are responsive to MeJA treatment.
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Meyer). To create a ginseng gene resource that contains the genes involved in the biosynthesis of secondary metabolites, including ginsenosides, we generated 3,134 expression sequence tags (ESTs) from MeJA-treated ginseng hairy roots. These ESTs assembled into 370 clusters and 1,680 singletons. Genes yielding highly abundant transcripts were those encoding proteins involved in fatty acid desaturation, the defense response, and the biosynthesis of secondary metabolites. Analysis of the latter group revealed a number of genes that may be involved in the biosynthesis of ginsenosides, namely, oxidosqualene cyclase (OSC), cytochrome P450, and glycosyltransferase. A novel OSC gene was also identified by this analysis. RNA gel blot analysis confirmed that transcription of this OSC gene, along with squalene synthase (SS) and squalene epoxidase (SE) gene transcription, is increased by MeJA treatment. 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subjects Acetates - pharmacology
Base Sequence
Biological and medical sciences
Biosynthesis
Biotechnology
complementary DNA
Cyclopentanes - pharmacology
DNA libraries
DNA, Plant - genetics
Eukaryotic cell cultures
expressed sequence tags
Fundamental and applied biological sciences. Psychology
gene expression regulation
Genes, Plant - drug effects
Genetic resources
ginsenoside
Ginsenosides - biosynthesis
Metabolism
Metabolites
Methods. Procedures. Technologies
methyl jasmonate
Miscellaneous
Oxylipins
Panax - drug effects
Panax - genetics
Panax ginseng
Panax pseudoginseng
phytochemicals
Plant cells and fungal cells
plant proteins
Plant Proteins - genetics
Plant Roots - drug effects
Plant Roots - genetics
RNA, Plant - drug effects
RNA, Plant - genetics
root hairs
Roots
Secondary metabolites
sequence analysis
Transcription, Genetic
triterpenoids
title Analysis of transcripts in methyl jasmonate-treated ginseng hairy roots to identify genes involved in the biosynthesis of ginsenosides and other secondary metabolites
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