Abstract
Vanisulfane is a plant resistance inducer that exhibits potent activity against potato virus Y (PVY), but its mechanism of action against this virus remains unclear. Our results showed that when we used 400 μg/mL of vanisulfane, it provided an impressive level of control (63.55%) against PVY in Nicotiana benthamiana L. Meanwhile, vanisulfane increased activities of catalase (CAT), superoxide dismutase (SOD), peroxidase (POD), and phenylalanine ammonia lyase (PAL) as well as inducing H2O2 accumulation and Ca2+ influx to mediate PVY resistance. Furthermore, combined transcriptome and proteome analyses revealed that vanisulfane upregulated the POD52, APX, and PR-1 genes and proteins in the salicylic acid (SA) signaling pathway. Experiments demonstrated that vanisulfane triggered the accumulation of SA, upregulated the expression of ICS1 and PR-1 genes, and induced resistance against PVY in transgenic Arabidopsis plants. Consequently, it can be concluded that vanisulfane mediates the SA-dependent signaling pathway to confer PVY resistance in plants.
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