The Paper's reporter He Liping
Recently, the Tobacco Research Institute of the Chinese Academy of Agricultural Sciences, the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences and Lancaster University in the United Kingdom have cooperated to discover the new insect virus partitivirus for the first time and analyze its interaction relationship with the invasive grassland nightcrawler.
The study found that the new insect virus partitivirus and its original host African armyworm (Spodoptera exempta) have a conditional mutually beneficial symbiotic relationship, but have a significant inhibitory effect on the population development of the invading new host grassland moth (S. frugiperda). This study provides new ideas for exploring new pest control strategies through the transfer of insect virus hosts. The results of the research are published online in The Public Science Library: PLoS Pathogenes.
Dr. Xu Pengjun of the Institute of Tobacco of the Chinese Academy of Agricultural Sciences is the first author of the paper, Academician Wu Kongming of the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences and Professor Kenneth Wilson of Lancaster University in the United Kingdom are the corresponding authors.
According to Xu Pengjun, the phenomenon of host transfer of viruses in nature rarely occurs, but if the virus successfully transfers hosts, it is usually due to the lack of relevant immunity and other defense systems of the new hosts and cause serious consequences. Insect viruses are derived from insects and are safe for humans and the environment. Most of the members of the genus Are important agricultural pests, especially the grassland moth has invaded China, seriously threatening crop safety, and is an ideal research model for new pest control strategies through the transfer of insect virus hosts.
Using sequencing technology (NGS), the researchers found three partiti-like new viruses in African armyworm that can be transmitted horizontally and maternally vertically by microinjection in African armyworm and grassland moths.
The results of the study found that the virus can delay the development rate of African armyworm and reduce the fertility of female insects, but can increase the level of larval resistance to karyotype polykeratovirus, which is a conditional mutually beneficial symbiotic relationship; however, the virus only has a negative impact on the grassland moth: reducing the fertility of female insects and the level of resistance of larvae to karyotype polyhedravirus.
Transcriptome sequencing showed that the virus reduced host fertility and regulated host resistance to nuclear polyhedravirus primarily by modulating immune-related and reproductive-related pathways. The study demonstrates a possible new pest control strategy: the use of NGS to discover new insect viruses, and the purpose of controlling pests by helping insect viruses complete host transfer.
Original link: https://journals.plos.org/plospathogens/article?id=10.1371%2Fjournal.ppat.1008467
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