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<p>Trichome, uni- or multicellular structures that look like fine hairs is a modified epidermal cell(s) of a plant and has various forms. Trichomes act as a physical barrier, protecting the plant from herbivores (i.e. insects) and pathogens (i.e. fungi) and also secrete various defensive secondary metabolites. In this study, we aimed to understand molecular details underpinning trichome production in radish. For this purpose, we performed transcriptomic analysis between a trichome-poor ‘Jinjudaepyung (JD)’ and a trichome-abundant ‘Simu (SM)’ inbred line. Five genes among 65 radish trichome-related genes were differentially expressed between two lines. Especially, radish <i>MYB23</i> homolog (<i>RsMYB23</i>, Rs189000) involved in the trichome initiation was down-regulated in the trichome-poor JD line compared to the trichome-abundant SM line. In addition, overexpression of <i>RsMYB23</i> in <i>Arabidopsis</i> model plant resulted in the higher abundance of trichomes than that of wild type plant. Our study showed that <i>RsMYB23</i> is required for the trichome initiation in the radish, expanding our understanding on trichome development in the radish plant.</p>

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Transcriptome analysis revealed that MYB23 homolog (RsMYB23) is required for the trichome production in radish (Raphanus sativus L.)

  • 期刊论文

  • 发表日期：

    2025年2月21日

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  • Jun Kim,
  • Minkyu Park,
  • Dong-Hwan Kim

摘要

Trichome, uni- or multicellular structures that look like fine hairs is a modified epidermal cell(s) of a plant and has various forms. Trichomes act as a physical barrier, protecting the plant from herbivores (i.e. insects) and pathogens (i.e. fungi) and also secrete various defensive secondary metabolites. In this study, we aimed to understand molecular details underpinning trichome production in radish. For this purpose, we performed transcriptomic analysis between a trichome-poor ‘Jinjudaepyung (JD)’ and a trichome-abundant ‘Simu (SM)’ inbred line. Five genes among 65 radish trichome-related genes were differentially expressed between two lines. Especially, radish MYB23 homolog (RsMYB23, Rs189000) involved in the trichome initiation was down-regulated in the trichome-poor JD line compared to the trichome-abundant SM line. In addition, overexpression of RsMYB23 in Arabidopsis model plant resulted in the higher abundance of trichomes than that of wild type plant. Our study showed that RsMYB23 is required for the trichome initiation in the radish, expanding our understanding on trichome development in the radish plant.