AI Article Synopsis
- Researchers identified 169 armadillo repeat (ARM) genes in upland cotton, categorizing them into 11 subfamilies based on phylogenetic analysis, highlighting the gene family's expansion through genome duplication.
- Expression studies indicate that the GhARM144 gene could negatively regulate cotton’s immune response against the plant pathogen Verticillium dahliae, potentially by affecting salicylic acid levels.
- GhARM144 interacts with another protein, GhOSM34, which appears to enhance resistance to V. dahliae; silencing this protein weakened cotton’s defense, suggesting a complex interplay in the plant's immune system.
Article Abstract
Proteins of the armadillo repeat gene family play important roles in plant pathogen response. Here, 169 armadillo (ARM) genes were identified in upland cotton (Gossypium hirsutum). Phylogenetic analysis grouped these into 11 subfamilies, with conserved protein structures within each subfamily. The results signify that the expansion of the gene family occurred via whole genome duplication and dispersed duplication. Expression profiling and network analysis suggest that GhARM144 may regulate cotton resistance to Verticillium dahliae. GhARM144 was upregulated in roots by V. dahliae infection or salicylic acid treatment. This upregulation indicates a negative regulatory role of GhARM144' in the cotton immune responses, potentially by manipulating salicylic acid biosynthesis. Protein interaction studies found that GhARM144 associates with an osmotin-like protein, GhOSM34, at the plasma membrane. Silencing GhOSM34 reduced the resistance to V. dahliae, suggesting it may play a positive regulatory role. The results demonstrate that GhARM144 modulates cotton immunity through interaction with GhOSM34 and salicylic acid signalling. Further study of these proteins may yield insights into disease resistance mechanisms in cotton and other plants.
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| http://dx.doi.org/10.1111/ppl.14259 | DOI Listing |
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