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Red Chinese Cabbage Transcriptome Analysis Reveals Structural Genes and Multiple Transcription Factors Regulating

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Summary

Reddish purple Chinese cabbage (RPCC) contains novel anthocyanins. Gene expression analysis identified key regulatory and biosynthesis genes, revealing a unique anthocyanin pathway in RPCC.

Keywords:
DEGsanthocyanin biosynthetic genesanthocyaninscis-regulatory motifsnetwork analysisqRT-PCRreddish purple Chinese cabbagetranscription factorstranscriptome

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Area of Science:

  • Plant Science
  • Biochemistry
  • Genomics

Background:

  • Reddish purple Chinese cabbage (RPCC) is a popular *Brassica rapa* variety.
  • RPCC is rich in anthocyanins, known for their health benefits.
  • Novel anthocyanins, including cyanidin and pelargonidin derivatives, were identified in RPCC.

Purpose of the Study:

  • To identify novel anthocyanins in RPCC.
  • To analyze gene expression differences between RPCC and green Chinese cabbage (GCC).
  • To elucidate the molecular mechanisms underlying anthocyanin biosynthesis in RPCC.

Main Methods:

  • Transcriptome analysis to identify differentially expressed genes (DEGs).
  • RT-qPCR to validate DEG expression levels in different aged seedlings.
  • Analysis of transcription factor binding motifs and gene regulatory networks.

Main Results:

  • 32,395 genes and 3345 DEGs were identified between RPCC and GCC.
  • 35 out of 60 validated DEGs showed higher transcript levels in RPCC.
  • MYB transcription factors (MYB75, MYB90, MYBL2) showed strong interactions with anthocyanin biosynthesis genes.
  • Key late biosynthesis genes and regulatory MYB genes were highly expressed in RPCC.

Conclusions:

  • The study identified novel anthocyanins and characterized key genes involved in their biosynthesis and accumulation in RPCC.
  • A proposed model highlights the unique anthocyanin pathway specific to RPCC.
  • This research provides insights into the genetic basis of anthocyanin production in *Brassica rapa*.