Interaction mechanism between OsCdc48 and Pik1-H4, and its regulation on rice blast disease resistance

HUANG Qiwei; ZHANG Lina; WANG Jiafeng; CHEN Chun

doi:10.7671/j.issn.1001-411X.202402018

Journal of South China Agricultural University > 2025 > 46(2): 164-174. > DOI: 10.7671/j.issn.1001-411X.202402018

HUANG Qiwei, ZHANG Lina, WANG Jiafeng, et al. Interaction mechanism between OsCdc48 and Pik1-H4, and its regulation on rice blast disease resistance[J]. Journal of South China Agricultural University, 2025, 46(2): 164-174. DOI: 10.7671/j.issn.1001-411X.202402018

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Interaction mechanism between OsCdc48 and Pik1-H4, and its regulation on rice blast disease resistance

College of Agriculture, South China Agricultural University/National Engineering Technology Research Center of Plant Space Breeding/Guangdong Provincial Key Laboratory of Plant Molecular Breeding, Guangzhou 510642, China

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Received Date: February 29, 2024
Available Online: December 10, 2024
Published Date: December 12, 2024

Graphical Abstract

Abstract

Abstract

Objective
To investigate the interaction mechanism between Pik1-H4 and cell division cycle protein OsCdc48, clarify its role in rice blast disease resistance.
Method
Firstly, the interactions between Pik1-H4 and OsCdc48 were verified using yeast two-hybrid and luciferase complementation assays. Then, the expression patterns of OsCdc48 after infection of Magnaporthe oryzae and its tissue-specific expression were analyzed by RT-qPCR. Next, the determination of OsCdc48’s sequence conservation, protein domains, phylogenetic relationships, protein 3D structure prediction and subcellular localization were performed. Finally, OsCdc48 mutant was created using CRISPR/Cas9 technology, the resistance identification of transgenic mutant to rice blast disease and expression analysis of pathogenesis-related genes were also conducted.
Result
The interactions between Pik1-H4 and OsCdc48 were confirmed, and OsCdc48 was induced by rice blast fungus infection. OsCdc48 was expressed in all tissues and was localized to the nucleus and cytoplasm. The sequence of OsCdc48 was conserved across different species, with the closest phylogenetic relationship to maize and sorghum, and it might form homologous hexamers. The OsCdc48 loss-of-function mutant ko-oscdc48 up-regulated the expression of disease-related genes and enhanced the resistance to rice blast disease.
Conclusion
This study lays a theoretical basis for further elucidating the mechanism of OsCdc48 and NLR protein Pik1-H4 regulating blast disease resistance and rice disease-resistant breeding.
- Oryza sativa L.,
- Rice blast disease,
- Magnaporthe oryzae,
- Pik1-H4,
- OsCdc48

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References (46)

References

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Interaction mechanism between OsCdc48 and Pik1-H4, and its regulation on rice blast disease resistance

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