Strigolactones Negatively Regulate Tobacco Mosaic Virus Resistance in .

Strigolactones (SLs) are plant hormones that regulate diverse developmental processes and environmental responses in plants. It has been discovered that SLs play an important role in regulating plant immune resistance to pathogens but there are currently no reports on their role in the interaction between and the tobacco mosaic virus (TMV). In this study, the exogenous application of SLs weakened the resistance of to TMV, promoting TMV infection, whereas the exogenous application of Tis108, a SL inhibitor, resulted in the opposite effect.