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<p>Hybrid teas, celebrated for their elegance and vivid colors, stand as the most cherished class of roses. Their aromatic and diverse varieties have significantly influenced the development of today’s beloved tea-scented roses. This study investigates the volatile organic compounds (VOCs) and gene expression patterns associated with fragrance production in fragrant and non-fragrant rose cultivars. A total of 253 VOCs, including 29 major compounds, were identified, with significant contributions from terpenoids, aromatic hydrocarbons, and esters. Fragrant cultivars displayed high concentrations of phenylethyl alcohol, citronellol, and geranic acid, while non-fragrant cultivars exhibited elevated levels of benzyl alcohol and phenylethyl acetate. Chemometric analyses, including Principal Component Analysis (PCA) and Partial Least Squares Discriminant Analysis (PLS-DA), revealed distinct volatile profiles between fragrant and non-fragrant cultivars. The presence of key compounds such as 3,5-dimethoxytoluene (DMT) and phenylethyl alcohol was strongly associated with fragrance. Gene expression analysis highlighted the role of several biosynthetic genes, including <i>RhNUDX1</i>, <i>RhGGPPS</i>, and <i>RhHMGCR</i>, in the production of monoterpenes and aromatic alcohols, with differential expression patterns observed between fragrant and non-fragrant cultivars. Notably, the expression of <i>RhOOMT</i> was positively correlated with the presence of DMT, a key scent compound. These findings underscore the complex genetic and metabolic pathways involved in rose fragrance and provide insights into the molecular basis of scent production, which could inform future rose breeding programs aimed at enhancing fragrance.</p>

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Comparative study on chemical characteristics of aromatic volatile organic compounds (VOCs) and gene expression in scented and non-scented Rosa Hybrida cultivars

  • 期刊论文

  • 发表日期：

    2025年10月21日

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  • P. R. Jadhav,
  • T. P. Ahammed Shabeer,
  • R. S. Yadav,
  • A. Dhole,
  • R. G. Kale,
  • D. V. S. Raju,
  • B. Ghosh,
  • K. Banerjee,
  • K. V. Prasad,
  • P. G. Kawar

摘要

Hybrid teas, celebrated for their elegance and vivid colors, stand as the most cherished class of roses. Their aromatic and diverse varieties have significantly influenced the development of today’s beloved tea-scented roses. This study investigates the volatile organic compounds (VOCs) and gene expression patterns associated with fragrance production in fragrant and non-fragrant rose cultivars. A total of 253 VOCs, including 29 major compounds, were identified, with significant contributions from terpenoids, aromatic hydrocarbons, and esters. Fragrant cultivars displayed high concentrations of phenylethyl alcohol, citronellol, and geranic acid, while non-fragrant cultivars exhibited elevated levels of benzyl alcohol and phenylethyl acetate. Chemometric analyses, including Principal Component Analysis (PCA) and Partial Least Squares Discriminant Analysis (PLS-DA), revealed distinct volatile profiles between fragrant and non-fragrant cultivars. The presence of key compounds such as 3,5-dimethoxytoluene (DMT) and phenylethyl alcohol was strongly associated with fragrance. Gene expression analysis highlighted the role of several biosynthetic genes, including RhNUDX1, RhGGPPS, and RhHMGCR, in the production of monoterpenes and aromatic alcohols, with differential expression patterns observed between fragrant and non-fragrant cultivars. Notably, the expression of RhOOMT was positively correlated with the presence of DMT, a key scent compound. These findings underscore the complex genetic and metabolic pathways involved in rose fragrance and provide insights into the molecular basis of scent production, which could inform future rose breeding programs aimed at enhancing fragrance.