A groundbreaking comparative transcriptome study has shed new light on the molecular mechanisms behind MYMIV (Mungbean Yellow Mosaic India Virus) resistance in Vigna mungo (black gram), one of Asia’s most important pulse crops. The research highlights how resistant varieties activate a sophisticated network of immune signaling, defense genes, and metabolic reprogramming to fight viral invasion.
The study compared resistant and susceptible genotypes and found that resistant plants rapidly trigger pathogen-recognition receptors (PRRs), followed by activation of salicylic acid signaling, ROS bursts, and WRKY, MYB, and NAC transcription factors. These regulators coordinate downstream responses such as cell wall strengthening, callose deposition, and enhanced antiviral protein production.
Researchers also identified key hub genes in protein–protein interaction networks, including those linked to RNA silencing, ubiquitin-mediated degradation, and secondary metabolite biosynthesis all crucial for restricting MYMIV replication. Enriched pathways like phenylpropanoid biosynthesis, MAPK signaling, and hormone crosstalk suggest a multi-layered defense mechanism.
This high-resolution transcriptome profiling not only deepens the understanding of virus–host interactions but also provides valuable molecular targets for developing durable MYMIV-resistant black gram varieties, supporting future breeding programs and sustainable agriculture.
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