甘蔗白条病及其致病菌Xanthomonas albilineans研究进展

Research advances in sugarcane leaf scald disease and its causal agent Xanthomonas albilineans

由白条黄单胞杆菌Xanthomonas albilineans引起的甘蔗白条病是一种寄生在植物维管组织的系统性细菌病害,在全球多数种植甘蔗的国家或地区普遍发生,对甘蔗产业的发展构成潜在威胁。本研究综述了甘蔗白条病的发生和分布、传播与流行规律以及病原菌生物学与基因组特性、鉴定与检测、遗传多样性和致病机理等方面内容;提出加强抗病种质挖掘与新品种选育推广、加快抗病分子育种进程、切断病害传播途径、加强隔离检验检疫等病害防控策略;此外,评估了该病害在我国蔗区流行暴发的风险,展望今后甘蔗抗病分子育种、病原菌致病机制及其与寄主互作机理等方面的分子基础研究重点与应用前景。

Sugarcane leaf scald, caused by proteobacteria Xanthomonas albilineans, is a systemic disease that occurs in the most sugarcane-producing countries/regions in the world and poses a potential threat to the development of the sugarcane industry. The occurrence, distribution, transmission and epidemiology of sugarcane leaf scald disease, the biological and genomic characteristics, identification and detection, and the genetic diversity and pathogenic mechanism of X. albilineans were reviewed in this paper. At the same time, current strategies for disease management were proposed to strengthen the development and utilization of disease-resistant germplasm resources, release new elite varieties by conventional breeding programs and molecular breeding, cut off the path of disease transmission, and strengthen disease inspection and quarantine. Besides, the risks of outbreak and spread of this epidemic disease in Chinese sugarcane-producing areas and the future prospects for research and application of molecular breeding for disease resistance, pathogenicity, and host-pathogen interaction mechanism were also discussed.