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piRNA - Piwi-interacting RNAs

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Updated: May 28, 2026

Enhanced Northern Blot Detection of Small RNA Species in Drosophila Melanogaster
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Published on: August 21, 2014

Integrated RNA-Seq and DAP-Seq Analyses Identify a DntMYB1-Centered Regulatory Module Controlling Purple Flower

Yuying Yin1, Jieqiu Wu1, Jie Li2

  • 1Dongguan Research Center of Agricultural Sciences, Dongguan 523086, China.

Plants (Basel, Switzerland)
|May 27, 2026
PubMed
Summary

Researchers identified DntMYB1 as a key regulator of purple flower color in Nobile-type Dendrobium orchids. This transcription factor controls anthocyanin biosynthesis, offering insights for improving ornamental traits.

Keywords:
DAP-seqR2R3-MYBRNA-seqanthocyaninflower colornobile-type Dendrobium

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Area of Science:

  • Plant genetics
  • Molecular biology
  • Biochemistry

Background:

  • Flower color is a crucial ornamental trait in Nobile-type Dendrobium orchids.
  • The molecular mechanisms behind purple flower pigmentation in these orchids are not well understood.

Purpose of the Study:

  • To investigate the regulatory mechanism of purple floral pigmentation in Nobile-type Dendrobium.
  • To identify key genes and transcription factors involved in anthocyanin biosynthesis.

Main Methods:

  • Comparative phenotypic and anthocyanidin profiling of white and purple Dendrobium flowers.
  • RNA sequencing (RNA-seq) to identify differentially expressed genes (DEGs).
  • DAP-seq, yeast one-hybrid, EMSA, and dual-luciferase assays to validate gene targets and regulatory interactions.

Main Results:

  • Significant enrichment of phenylpropanoid and flavonoid pathways among DEGs.
  • DntMYB1, an R2R3-MYB transcription factor, was identified as a positive regulator of purple pigmentation.
  • DntMYB1 directly regulates downstream genes including Dnt4CL1 and DntF3'H1, involved in anthocyanin biosynthesis.

Conclusions:

  • DntMYB1 plays a central role in purple flower formation by coordinating precursor metabolism and anthocyanin synthesis.
  • This study provides novel insights into the molecular regulation of flower color in Nobile-type Dendrobium.
  • Identified candidate genes can be utilized for improving ornamental traits in orchids.