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Transcript expression profiling for adventitious roots of Panax ginseng Meyer.

Sathiyamoorthy Subramaniyam1, Ramya Mathiyalagan2, Sathishkumar Natarajan2

  • 1Graduate School of Biotechnology & Ginseng Bank, College of Life Science, Kyung Hee University, Yongin 449-701, South Korea; Insilicogen Inc., #909, Venture Valley, 958, Gosaek-dong, Gwonseon-gu, Suwon, Gyeonggi-do 441-813, South Korea.

Gene
|May 17, 2014
PubMed
Summary

This study generated a comprehensive Panax ginseng transcriptome from methyl jasmonic acid-treated roots. Gene expression analysis identified candidate genes involved in ginsenoside biosynthesis, expanding resources for understanding this medicinal plant.

Keywords:
Adventitious rootGene regulationMeJAPanax ginseng

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Area of Science:

  • Plant Science
  • Molecular Biology
  • Genomics

Background:

  • Panax ginseng is a key medicinal plant in oriental medicine, crucial for ginsenosides.
  • Limited genomic information has hindered the characterization of ginsenoside pathway genes.

Purpose of the Study:

  • To generate a comprehensive transcriptome of Panax ginseng adventitious roots.
  • To identify candidate genes involved in the ginsenoside pathway through gene expression analysis.

Main Methods:

  • RNA 454 pyrosequencing of adventitious roots treated with methyl jasmonic acids over time.
  • De novo assembly and annotation of the transcriptome using GO and KEGG databases.
  • Digital gene expression analysis to identify differentially expressed genes.

Main Results:

  • A reference transcriptome of 39,304,529 transcripts was assembled and 58.5% were annotated.
  • 3813 unique transcripts showed significant (≥2 fold) up or downregulation.
  • 30 transcription factors, 20 cytochromes, and 11 glycosyl transferases were predicted as ginsenoside pathway gene candidates.

Conclusions:

  • The generated transcriptome significantly expands Panax gene resources.
  • This study provides a valuable platform for investigating gene networks in Panax ginseng.
  • The data facilitates further research into secondary metabolism and stress responses in Panax ginseng.