Rapid detection of the rice false smut fungus Ustilaginoidea virens by lateral flow strip-based recombinase polymerase amplification assay

Rice false smut, caused by Ustilaginoidea virens, is a devastating disease that greatly reduces rice yield and quality. However, controlling rice false smut disease is challenging due to the unique infection mode of U. virens. Therefore, there is a need for early diagnosis and monitoring techniques...

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Veröffentlicht in:Journal of Integrative Agriculture 2024-11, Vol.23 (11), p.3763-3773
Hauptverfasser: Xi, Jiacheng, Wan, Sanlian, Li, Yue, Xu, Yuandi, Yang, Jing, Zhang, Ting, Chen, Jiajia, Zhang, Zhengguang, Shen, Danyu, Zhang, Haifeng
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Sprache:eng
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Zusammenfassung:Rice false smut, caused by Ustilaginoidea virens, is a devastating disease that greatly reduces rice yield and quality. However, controlling rice false smut disease is challenging due to the unique infection mode of U. virens. Therefore, there is a need for early diagnosis and monitoring techniques to prevent the spread of this disease. Lateral flow strip-based recombinase polymerase amplification (LF-RPA) overcomes the limitations of current U. virens detection technologies, which are time-consuming, require delicate equipment, and have a high false-positive rate. In this study, we used a comparative genomics approach to identify Uv_3611, a specific gene of U. virens, as the target for the LF-RPA assay. The designed primers and probe efffectively detected the genomic DNA (gDNA) of U. virens and demonstrated no cross-reactivity with related pathogens. Under optimal conditions, the LF-RPA assay demonstrated a sensitivity of 10 pg of U. virens gDNA. Additionally, by incorporating a simplified PEG-NaOH method for plant DNA extraction, the LF-RPA assay enabled the detection of U. virens in rice spikelets within 30 min, without the need for specialized equipment. Furthermore, the LF-RPA assay successfully detected U. virens in naturally infected rice and seed samples in the field. Therefore, the LF-RPA assay is sensitive, efficient, and convenient, and could be developed as a kit for monitoring rice false smut disease in the field.
ISSN:2095-3119
DOI:10.1016/j.jia.2023.09.027