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<p>This study explores the potential of chemical mutagenesis to enhance coffee rust (<i>Hemileia vastatrix</i>) resistance in <i>Coffea arabica</i> L. var. Catuaí. One hundred and sixty-three plants were mutagenized with sodium azide and ethyl methanesulfonate and subjected to infection assays with <i>H. vastatrix</i> uredospores. Eleven mutagenized plants exhibited infection severity identical to that of the resistant control, CR95. Gene expression analysis of plants revealed upregulation of defense-related genes, including <i>CaRLK</i>, <i>CaGT</i>, and <i>CaPR10</i>, especially in plants with reduced infection severity. These results indicate that induced mutations may improve rust resistance, presenting a viable approach for developing resistant Arabica coffee varieties.</p>

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Differential gene expression in response to Hemileia vastatrix in chemically mutagenized coffee plants (Coffea arabica L. var. Catuaí)

  • 期刊论文

  • 发表日期：

    2025年3月12日

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  • Alejandro Bolívar-González,
  • Ana Tapia-Fernández,
  • Priscila Chaverrí,
  • Andrés Gatica-Arias

摘要

This study explores the potential of chemical mutagenesis to enhance coffee rust (Hemileia vastatrix) resistance in Coffea arabica L. var. Catuaí. One hundred and sixty-three plants were mutagenized with sodium azide and ethyl methanesulfonate and subjected to infection assays with H. vastatrix uredospores. Eleven mutagenized plants exhibited infection severity identical to that of the resistant control, CR95. Gene expression analysis of plants revealed upregulation of defense-related genes, including CaRLK, CaGT, and CaPR10, especially in plants with reduced infection severity. These results indicate that induced mutations may improve rust resistance, presenting a viable approach for developing resistant Arabica coffee varieties.