Potassium sulphate induces resistance of rice against the root-knot nematode Meloidogynegraminicola

Potassium (K), an important nutrient element, can improve the stress resistance/tolerance of crops. The application K in resisting plant-parasitic nematodes shows that treatment reduce occurrence nematode diseases and increase crop yield. However, data on K2SO4 induced rice resistance against root-knot Meloidogyne graminicola are still lacking. In this work, reduced galls plants delayed development nematodes. Rather than affecting attractiveness roots to morphological phenotype giant cells at feeding sites, such effect is achieved by rapidly priming hydrogen peroxide (H2O2) accumulation increasing callose deposition. Meanwhile, were more potassium channel OsAKT1 transporter OsHAK5 gene-deficient wild-type, while K2SO4-induced showed weaker defective plants. addition, during process infection, expression jasmonic acid (JA)/ethylene (ET)/brassinolide (BR) signaling pathway-related genes pathogenesis-related (PR) OsPR1a/OsPR1b was up-regulated after treatment. conclusion, M. graminicola. mechanism inducing prime basal defense required participation K+ rice. These laid a foundation for further study rational use fertilizer improving field.