Current understanding of turnip mosaic virus pathogenesis and host resistance mechanisms in Brassica

Abstract

Turnip mosaic virus (TuMV) is a devastating potyvirus pathogen that infects a wide variety of both cultivated and wild Brassicaceae plants. We urgently need more information and understanding of TuMV pathogenesis and the host responses involved in disease development in cruciferous crops. TuMV displays great versatility in viral pathogenesis, especially in its replication and intercellular movement. Moreover, in the coevolutionary arms races between TuMV and its hosts, the virus has evolved to co-opt host factors to facilitate its infection and counter host defense responses. This review mainly focuses on recent advances in understanding the viral factors that contribute to the TuMV infection cycle and the host resistance mechanism in Brassica. Finally, we propose some future research directions on TuMV pathogenesis and control strategies to design durable TuMV-resistant Brassica crops.