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<p>Pectin acetylesterase (PAE) regulates pectin acetylation, which affects plant growth, development, and stress tolerance. While their functions are well-defined in models like Arabidopsis, we still know surprisingly little about how they operate in tomatoes (<i>Solanum lycopersicum</i>). We identified 17 SlPAE genes using tomato genome-wide analysis. These genes were classified phylogenetically into three conserved subfamilies, with branch members sharing domain architectures, motifs, and genomic structure. Promoter cis-element analysis identified multiple motifs related to hormone signaling, light response, and stress response. Spatiotemporal expression patterns obtained via qRT-PCR revealed the functional roles of <i>SlPAE</i> genes. Notably, silencing <i>SlPAE16</i> effectively retarded pedicel abscission, a process mediated by the inhibition of <i>TAPG1/2/4</i> expression. These findings clarify the functional diversity within the PAE gene family, providing a much-needed framework for future research into their specific biological roles in tomatoes.</p>

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Genome-wide analysis of the pectin acetylesterase (PAE) gene family in tomato and SlPAE16 functional characterization associated with pedicel abscission

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月18日

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  • Ruizhen Li,
  • Lin Shen,
  • Jianzhong Tie,
  • Mingfang Qi,
  • Tao Xu,
  • Lina Cheng

摘要

Pectin acetylesterase (PAE) regulates pectin acetylation, which affects plant growth, development, and stress tolerance. While their functions are well-defined in models like Arabidopsis, we still know surprisingly little about how they operate in tomatoes (Solanum lycopersicum). We identified 17 SlPAE genes using tomato genome-wide analysis. These genes were classified phylogenetically into three conserved subfamilies, with branch members sharing domain architectures, motifs, and genomic structure. Promoter cis-element analysis identified multiple motifs related to hormone signaling, light response, and stress response. Spatiotemporal expression patterns obtained via qRT-PCR revealed the functional roles of SlPAE genes. Notably, silencing SlPAE16 effectively retarded pedicel abscission, a process mediated by the inhibition of TAPG1/2/4 expression. These findings clarify the functional diversity within the PAE gene family, providing a much-needed framework for future research into their specific biological roles in tomatoes.