ArticleMolecular biotechnology2025
Investigating the Role of OsHDT701 and Other Blast-Associated Negative Regulatory Genes in Indica Rice Cultivar Ranjit Using Combined Wet Lab and Computational Approaches.
Article in Molecular biotechnology, 2025. 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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7 authors.
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Abstract
Rice blast, caused by Magnaporthe oryzae, severely impacts global rice production. Understanding the role of the host's blast negative regulatory genes is crucial for combating this disease. We studied the expression of seven rice blast negative regulatory genes (previously characterized in ssp. japonica) in susceptible (Ranjit and Mahsuri) and tolerant/resistant (Shahsarang 1 and IR64) indica rice cultivars during M. oryzae infection. The selected genes showed differential expression patterns, with OsHDT701 (histone H4 deacetylase) downregulated in tolerant/resistant and upregulated in susceptible cultivars. Promoter analysis of OsHDT701 in cv. Ranjit revealed biotic stress-responsive and M. oryzae effector binding motifs (MoHTR2 and MoSPAB1). Protein-DNA docking showed an interaction for both the effectors and promoter sequences. Furthermore, a strong interaction between the OsERF922 transcription factor (a negative regulator of rice blast) and GCC box at the promoter suggests OsERF922-mediated regulation of OsHDT701. Next, a comparative analysis of ssp. japonica (Nipponbare) OsHDT701 CDS to 11 indica rice cultivars, including Ranjit, detected an SNP (T-A) at position 591. Moreover, the structure modeling and protein-protein interaction reveal that OsHDT701 may form a complex with other histone deacetylases to regulate defense-related gene expression. Taken together, our study unveils new possibilities for OsHDT701 regulation mechanisms during M. oryzae infection.
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