The consciousness of stress: Functional roles of ORFs and MicroRNAs in tomato defense against fungal pathogens

• ORFs drive immune responses in tomato plants. • MicroRNAs regulate defense gene expression post-transcriptionally. • ORF-miRNA interaction optimizes tomato defense mechanisms. • CRISPR/Cas9 enables fungal-resistant tomato development. • Environmental stresses impact tomato immune responses. • miRNAs fine-tune defense while balancing plant growth. Tomato plants constantly encounter fungal pathogens, which trigger intricate defense mechanisms at the molecular level. Among these, upstream open reading frames (uORFs) and main open reading frames (mORFs), together with microRNAs (miRNAs), play pivotal roles in orchestrating stress-responsive gene regulation. uORFs and mORFs encode or influence the synthesis of key proteins involved in pathogen recognition, signal transduction, and immune activation, whereas miRNAs act as post-transcriptional regulators that fine-tune the expression of these defense-related genes, including those governing signaling pathways and transcription factors. Recent studies have revealed coordinated crosstalk between uORFs, mORFs, and miRNAs that collectively shape tomato defense strategies against major fungal pathogens such as Botrytis cinerea and Fusarium oxysporum . This review synthesizes current insights into how uORFs and miRNAs interact to modulate immune regulation, gene silencing, and adaptive stress responses in tomato. A deeper understanding of these molecular networks offers promising avenues for developing fungal-resistant tomato cultivars through targeted genetic and biotechnological interventions. Integrated model illustrating how coordinated regulation between ORFs and microRNAs orchestrates tomato immune responses against fungal pathogens, emphasizing translational control, signaling crosstalk, and future prospects in RNA-based and genome-editing approaches for crop resilience.