Changes in gene expression during hairy root formation by<Emphasis Type="Italic">Agrobacterium rhizogenes</Emphasis> infection in ginseng |
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Authors: | Hwa?-Jee?Chung In?Sook?Cho Jee?-Hyub?Kim Dong?Su?In Cheol?Goo?Hur Ji?Sook?Song Sung?Sick?Woo Dong?-Woog?Choi Email author" target="_blank">Jang?Ryol?LiuEmail author |
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Institution: | (1) Laboratory of Functional Genomics for Plant Secondary Metabolism, Eugentech, Inc., 305-333 Daejeon, Korea;(2) National Center for Genome Information, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 305-333 Daejeon, Korea;(3) Unigen, Inc. Cheonan, 330-863 Chungnam, Korea;(4) Plant Cell Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 305-333 Daejeon, Korea |
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Abstract: | Researchers have widely adopted the hairy root culture system as a means for producing secondary metabolites, including ginsenosides
from ginseng. Although bacterial genes are involved, the aspects of plant gene expression are unclear. Using a cDNA microarray
approach, we identified genes that are differentially expressed in ginseng hairy roots afterAgrobacterium rhizogenes infection. Our goal was to gain an initial understanding of the correlation between hairy root morphology and ginsenoside
production. Among the 250 genes analyzed here, 63 (including 14 that are unclassified) were differentially expressed in a
hairy root line containing a high level of ginsenosides. Of the genes that had been functionally categorized, 29% and 17%
were active in metabolism and stress responses, respectively. Most were primarily associated with ribosomal proteins, thereby
functioning in protein synthesis and destination. Their expression was down-regulated in hairy roots having less lateral branching.
This phenotype may have resulted from the manipulation of metabolic activities by the translational machinery. |
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Keywords: | Araliaceae ginsenosides Panax ginseng ribosomal protein genes |
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