1. Transcriptional Comparison Reveals Differential Resistance Mechanisms between CMV-Resistant PBC688 and CMV-Susceptible G29.
- Author
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Guo G, Pan B, Gong C, Wang S, Liu J, Gao C, and Diao W
- Subjects
- Abscisic Acid metabolism, Abscisic Acid pharmacology, Ethylenes metabolism, Transcriptome, Plant Proteins genetics, Plant Proteins metabolism, Gene Expression Profiling methods, Host-Pathogen Interactions genetics, Plant Growth Regulators genetics, Plant Growth Regulators pharmacology, Cucumovirus genetics, Cucumovirus pathogenicity, Disease Resistance genetics, Plant Diseases virology, Plant Diseases genetics, Capsicum virology, Capsicum genetics, Gene Expression Regulation, Plant
- Abstract
The Cucumber mosaic virus (CMV) presents a significant threat to pepper cultivation worldwide, leading to substantial yield losses. We conducted a transcriptional comparative study between CMV-resistant (PBC688) and -susceptible (G29) pepper accessions to understand the mechanisms of CMV resistance. PBC688 effectively suppressed CMV proliferation and spread, while G29 exhibited higher viral accumulation. A transcriptome analysis revealed substantial differences in gene expressions between the two genotypes, particularly in pathways related to plant-pathogen interactions, MAP kinase, ribosomes, and photosynthesis. In G29, the resistance to CMV involved key genes associated with calcium-binding proteins, pathogenesis-related proteins, and disease resistance. However, in PBC688, the crucial genes contributing to CMV resistance were ribosomal and chlorophyll a-b binding proteins. Hormone signal transduction pathways, such as ethylene (ET) and abscisic acid (ABA), displayed distinct expression patterns, suggesting that CMV resistance in peppers is associated with ET and ABA. These findings deepen our understanding of CMV resistance in peppers, facilitating future research and variety improvement.
- Published
- 2024
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