ArticleFunctional & integrative genomics2023
Synonymous sites for accessibility around microRNA binding sites in bacterial spot and speck disease resistance genes of tomato.
Article in Functional & integrative genomics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- The Roles of Plant MicroRNAs in Defence Against Pathogens.Molecular plant pathology · 2026Review
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2 authors.
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Abstract
The major causes of mass tomato infections in both covered and open ground are agents of bacterial spot and bacterial speck diseases. MicroRNAs (miRNAs) are 16-21 nucleotides in length, non-coding RNAs that inhibit translation and trigger mRNA degradation. MiRNAs play a significant part in plant resistance to abiotic and biotic stresses by mediating gene regulation via post-transcriptional RNA silencing. In this study, we analyzed a collection of bacterial resistance genes of tomato and their binding sites for tomato miRNAs and Pseudomonas syringe pv. tomato miRNAs. Our study found that two genes, bacterial spot disease resistance gene (Bs4) and bacterial speck disease resistance gene (Prf), have a 7mer-m8 perfect seed match with miRNAs. Bs4 was targeted by one tomato miRNA (sly-miR9470-3p) and three Pseudomonas syringe pv. tomato miRNAs (PSTJ4_3p_27246, PSTJ4_3p_27246, and PSTJ4_3p_27246). Again, Prf gene was found to be targeted by two tomato miRNAs namely, sly-miR9469-5p and sly-miR9474-3p. The accessibility of the miRNA-target site and its flanking regions and the relationship between relative synonymous codon usage and tRNAs were compared. Strong access to miRNA targeting regions and decreased rate of translations suggested that miRNAs might be efficient in binding to their particular targets. We also found the existence of rare codons, which suggests that it could enhance miRNA targeting even more. The codon usage pattern analysis of the two genes revealed that both were AT-rich (Bs4 = 63.2%; Prf = 60.8%). We found a low codon usage bias in both genes, suggesting that selective restriction might regulate them. The silencing property of miRNAs would allow researchers to discover the involvement of plant miRNAs in pathogen invasion. However, the efficient validation of direct targets of miRNAs is an urgent need that might be highly beneficial in enhancing plant resistance to multiple pathogenic diseases.
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