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Rice stripe virus coat protein induces the accumulation of jasmonic acid,activating plant defence against the virus while also attracting its vector to feed |
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| Authors: | Kelei Han Haijian Huang Hongying Zheng Mengfei Ji Quan Yuan Weijun Cui Hehong Zhang Jiejun Peng Yuwen Lu Shaofei Rao Guanwei Wu Lin Lin Xuemei Song Zongtao Sun Junmin Li Chuanxi Zhang Yonggen Lou Jianping Chen Fei Yan |
| Institution: | 1. State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, China
Key Laboratory of Biotechnology in Plant Protection of MOA and Zhejiang Province, Zhejiang Academy of Agricultural Sciences, Hangzhou, China College of Plant Protection, Nanjing Agricultural University, Nanjing, China;2. State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, China Key Laboratory of Biotechnology in Plant Protection of MOA and Zhejiang Province, Zhejiang Academy of Agricultural Sciences, Hangzhou, China;3. State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, China;4. School of Medicine, Ningbo University, Ningbo, China;5. State Key Laboratory of Rice Biology, Institute of Insect Sciences, Zhejiang University, Hangzhou, China |
| Abstract: | The jasmonic acid (JA) pathway plays crucial roles in plant defence against pathogens and herbivores. Rice stripe virus (RSV) is the type member of the genus Tenuivirus. It is transmitted by the small brown planthopper (SBPH) and causes damaging epidemics in East Asia. The role(s) that JA may play in the tripartite interaction against RSV, its host, and vector are poorly understood. Here, we found that the JA pathway was induced by RSV infection and played a defence role against RSV. The coat protein (CP) was the major viral component responsible for inducing the JA pathway. Methyl jasmonate treatment attracted SBPHs to feed on rice plants while a JA-deficient mutant was less attractive than wild-type rice. SBPHs showed an obvious preference for feeding on transgenic rice lines expressing RSV CP. Our results demonstrate that CP is an inducer of the JA pathway that activates plant defence against RSV while also attracting SBPHs to feed and benefitting viral transmission. This is the first report of the function of JA in the tripartite interaction between RSV, its host, and its vector. |
| Keywords: | coat protein jasmonic acid Laodelphax striatellus rice stripe virus small brown planthopper (SBPH) |