介体叶蝉传播水稻呼肠孤病毒的研究进展OA

The leafhopper,as one of the agricultural pests,not only causes direct feeding damage,but also further harms rice by transmitting viral diseases.To date,seven rice viruses transmitted by leafhoppers have been identified.Among them,the rice reoviruses such as rice dwarf virus(RDV)and rice gall dwarf virus(RGDV)of Phytoreovirus have persistently occurred since their initial discovery in China,causing severe damage to rice production.After over half a century of continuous research by scientists worldwide,great progress has been made in understanding the mechanisms of leafhopper-mediated transmission of plant reoviruses.In this article,the transmission characteristics of rice reoviruses by leafhoppers,the mechanisms of rice reoviral propagation within leafhoppers and the horizontal and vertical transmission of rice reoviruses by their vector leafhoppers,the strategies by which reoviruses overcome insect immune barriers,and the interaction mechanisms among rice reoviruses,leafhopper vectors and host rice,were reviewed.The characteristics of rice reoviruses transmitted by leafhoppers in a persistent-propagative manner were summarized.It was clarified that rice reoviruses use the viroplasm as the replication site and the virion-containing tubular structure to spread in leafhoppers.Meanwhile,salivary proteins act as effector proteins to promote viral horizontal transmission from the salivary gland to the phloem of plants.The unique mechanism that rice reoviruses are carried by leafhopper symbiotic bacteria and sperm to break through the vertical transmission barrier has been revealed.However,the mechanisms of the intermittent,explosive and migratory nature of viral diseases remain unclear,and there is still a lack of effective prevention and control strategies for viral diseases.Future research needs to further reveal the interaction mechanism between rice reoviruses and vectors,discover new antiviral genes and germplasm resources,and develop efficient virus prevention and control strategies,with the aim to provide references for the research and prevention and control of rice reoviruses and other insect-borne plant viruses.