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<p>Plants have developed defensive mechanisms against insect herbivory to deter pests, mitigate insect feeding, and resist plant injury. Defense reactions induced by herbivory are regulated by phytohormones like salicylic acid (SA) and jasmonic acid (JA). The jasmonate-ZIM/TIFY domain (JAZ) gene family is intrinsically linked to the JA pathway where the JAZ proteins function as critical repressors, but their role in eggplant defense against herbivores remains unexplored. In this study, bioinformatics analysis and infestation assays were performed to investigate herbivory-induced re-programming of <i>JAZ</i> gene expression. We identified eleven (11) <i>JAZ</i> genes in eggplant (<i>Solanum melongena</i>) and their corresponding proteins, investigated gene structure, evolutionary relationships and herbivory-responsive expression patterns induced by the eggplant fruit and shoot borer (EFSB). All <i>SmelJAZ</i> genes encode the conserved TIFY and Jas-CCT protein domains. Phylogenetic and synteny analysis, and interaction modeling revealed structural conservation of <i>Smel</i>JAZs in eggplant, tomato, potato, tobacco and <i>Arabidopsis</i>. Functional annotation, RNA-seq re-analysis, and cis-acting regulatory element (CARE) analysis predicted involvement of <i>SmelJAZ</i> genes in defense reactions, responses to wounding, and inducibility by many phytohormones. Indeed, <i>SmelJAZ</i> genes were revealed to be expressed in eggplant shortly and within two weeks after initial EFSB infestation. These findings provide insights into understanding insect resistance in eggplant, as well as in elucidating the molecular bases of plant-insect interactions.</p>

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Genome-Wide Investigation of Eggplant JAZ Genes in Response to Herbivory

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Ian Bien M. Oloc-oloc,
  • Eureka Teresa M. Ocampo,
  • Lourdes D. Taylo,
  • Desiree M. Hautea

摘要

Plants have developed defensive mechanisms against insect herbivory to deter pests, mitigate insect feeding, and resist plant injury. Defense reactions induced by herbivory are regulated by phytohormones like salicylic acid (SA) and jasmonic acid (JA). The jasmonate-ZIM/TIFY domain (JAZ) gene family is intrinsically linked to the JA pathway where the JAZ proteins function as critical repressors, but their role in eggplant defense against herbivores remains unexplored. In this study, bioinformatics analysis and infestation assays were performed to investigate herbivory-induced re-programming of JAZ gene expression. We identified eleven (11) JAZ genes in eggplant (Solanum melongena) and their corresponding proteins, investigated gene structure, evolutionary relationships and herbivory-responsive expression patterns induced by the eggplant fruit and shoot borer (EFSB). All SmelJAZ genes encode the conserved TIFY and Jas-CCT protein domains. Phylogenetic and synteny analysis, and interaction modeling revealed structural conservation of SmelJAZs in eggplant, tomato, potato, tobacco and Arabidopsis. Functional annotation, RNA-seq re-analysis, and cis-acting regulatory element (CARE) analysis predicted involvement of SmelJAZ genes in defense reactions, responses to wounding, and inducibility by many phytohormones. Indeed, SmelJAZ genes were revealed to be expressed in eggplant shortly and within two weeks after initial EFSB infestation. These findings provide insights into understanding insect resistance in eggplant, as well as in elucidating the molecular bases of plant-insect interactions.