白背飞虱传播南方水稻黑条矮缩病毒的特性和机制研究进展OA

The rice viral disease caused by southern rice black-streaked dwarf virus(SRBSDV)can lead to severe plant stunting,substantial yield losses and even total crop failure of rice.Since its outbreak in the early 21st century,this disease has spread across many major rice-growing areas in Asia,posing a serious threat to rice production security.In response,it has been listed as a major disease in the"List of Class One Crop Pests and Diseases"by the Ministry of Agriculture and Rural Affairs of China.SRBSDV spreads in the field only through the migratory pest white-backed planthopper(Sogatella furcifera)in a persistent propagative manner.The epidemic intensity of the disease is directly influenced by the distribution,population dynamics and virus transmission efficiency of the vector S.furcifera.In this article,we systematically reviewed and discussed the research progress on the characteristics and mechanisms of SRBSDV transmission by the vector S.furcifera.First,we summarized the virion structure,genome composition,and functional roles of virus-encoded proteins.Second,we outlined the seasonal migration patterns of S.furcifera,and its role in the regional spread and field outbreaks of the virus disease,and analyzed the biological characteristics of virus transmission by the insect vector.On this basis,we focused on the molecular mechanisms underlying the efficient transmission of SRBSDV by S.furcifera,including the processes of viral replication and propogation,immune evasion strategies,and the key mechanisms for crossing tissue barriers such as the midgut within the vector.Furthermore,we revealed the molecular and ecological interaction network among SRBSDV,S.furcifera and rice,pointing out that the virus simultaneously manipulates vector behavior and host physiology to establish a cooperative transmission system that facilitates its own spread.Future research should aim to uncover the dynamic adaptation mechanisms between the virus and the insect vector during their long-term co-evolution.This includes investigating the specific functions of viral proteins in vector recognition,infection and transmission,as well as understanding the interplay between the vector's immune system and viral replication.At the application level,it is recommended to develop green management strategies that block the virus transmission by targeting the identified key virus transmission factors.This will provide theoretical support and new strategies for the sustainable management of rice viral diseases.