香蕉枯萎病菌检测技术研究进展

    Research Progress on Detection Technologies for Fusarium Wilt of Banana

    • 摘要: 香蕉枯萎病是由尖孢镰刀菌古巴专化型(Fusarium oxysporum f. sp. cubenseFoc)引起的毁灭性土传病害,病害缺乏高效的防控措施,一旦发生便难以根治,且在土壤中可存活达数十年,对全球香蕉产业构成严重威胁。研发快速、准确的早期检测技术对于香蕉枯萎病菌诊断与防控、香蕉产业安全生产至关重要。目前,Foc检测技术主要包括传统诊断方法,以及PCR分子检测技术、等温扩增技术、生物传感器技术、光谱学与遥感技术的检测方法。该文从检测靶标、检测原理、优缺点及适用场景等方面对各类检测方法进行深入的比较分析。传统诊断方法可实现基础检测需求,但耗时、准确性不足、技术操作专业要求高;PCR分子检测技术具备高灵敏度、检测快速、准确性高等优势,但高度依赖已知特异序列信息及专业设备,仅适用于实验室定性或定量检测;等温扩增技术摆脱对设备的依赖,可实现现场快速检测,但易产生非特异性扩增或存在气溶胶污染导致假阳性风险;生物传感器技术具有操作简单、检测快速、设备可小型化等特点,但准确性不够,灵敏度取决于检测靶标的特异性;光谱学与遥感技术具备快速、直观、无损检测等特点,但特异性不足、对环境干扰敏感。基于此,提出Foc检测技术的未来研究方向主要包括开发高特异检测新靶标、优化现场快速检测体系、多技术融合应用等,以期促进Foc检测技术更加便携、准确、快速、易操作、低成本,推动香蕉枯萎病绿色高效防控与香蕉产业高质量发展。

       

      Abstract: Fusarium wilt of banana is a devastating soil-borne disease caused by Fusarium oxysporum f. sp. cubense (Foc). Due to the lack of effective management strategies, the disease is difficult to eradicate once occurred, and the pathogen can persist in soil for several decades, posing a severe threat to the global banana industry. The development of rapid and accurate early diagnostic techniques is therefore crucial for timely disease control and for ensuring sustainable banana production. Recently, traditional diagnostic method, PCR molecular detection technology, isothermal amplification technology, biosensor technology as well as spectroscopy and remote sensing tehndogy are used in Foc detection. Various detection methods are compared and analyzed in terms of detection targets, detection principles, advantages and disadvantages, and applicable scenarios. Traditional diagnostic method can meet basic identification needs but are time-consuming, lack accuracy, and are highly dependent on professional personnel. PCR molecular detection technology offer high sensitivity, rapid detection, and high accuracy, yet they rely on known specific sequence information, require specialized equipment, and are generally limited to laboratory-based qualitative or quantitative analysis. Isothermal amplification technology reduce dependence on sophisticated instruments and enable on-site rapid detection, however, they are prone to producing non-specific amplification or false positives due to aerosol pollution. Biosensor technology feature simple operation, rapid detection and miniaturization of equipment, but their accuracy remains limited, and the sensitivity is highly dependent on the specificity of detection targets. Spectroscopic and remote sensing technology enable rapid, intuitive, and non-destructive detection, but they often suffer from insufficient specificity and are sensitive to environmental interference. Based on recent advances, future research directions for Foc detection are prospected, including the development of new highly specific detection targets, optimization of on-site rapid detection systems, and the integrated application of multiple technologies. These efforts are expected to facilitate the establishment and application of protable, accurate, rapid, easy-to-operate and low-cost detection techniques for Foc, thereby supporting the green and efficient management of Fusarium wilt of banana and promoting the high-quality development of the banana industry.