Phosphatidylinositol-phospholipase C4 suppresses the hypersensitive response of Nicotiana benthamiana
Year: 2023
Type: article
Abstract: Phospholipid signaling plays an important role in plant immune responses. Here, we isolated two phospholipase C4 (PLC4) orthologs in the Nicotiana benthamiana genome, designated as N. benthamiana PLC4-1 and PLC4-2 (NbPLC4-1 and NbPLC4-2). We created NbPLC4-1- and NbPLC4-2- silenced plants. Induction of the hypersensitive response (HR), including HR cell death and bacterial population reduction, was accelerated in both NbPLC4-1- and NbPLC4-2-silenced plants challenged with N. benthamiana-incompatible Ralstonia solanacearum 8107. The NbPLC4-1- and NbPLC4-2-silenced plants also showed enhanced expression of Nbhin1, a HR marker gene. Expressions of genes for salicylic acid (SA) and jasmonic acid (JA) signaling were drastically increased in NbPLC4-1- and NbPLC4-2-silenced plants by R. solanacearum inoculation. In addition, NbPLC4-1 and NbPLC4-2 silencing triggered reactive oxygen species (ROS) hyper-production. These results suggest that NbPLC4s are closely associated with JA, SA, and ROS signaling and act as negative regulators of the HR in N. benthamiana.
Source: Plant Biotechnology
Institutions: University of Kochi, Kōchi University
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: diamond
Awards: G4185481506, Study on the function of individual type III effectors of Ralstonis pseudosolanacearum using a super-multi deletion mutant, Analysis of conferred disease resistance by artificial control of phosphatidc acid metabolism in plants, Molecura mechanisms of planti immunuty by phospholipid turnover and plant disease management
OpenAlex ID: W4322392232