Silicon mediated resistance to rice sheath blight by increasing ferulic acid and chlorogenic acid

摘要

Silicon (Si) can enhance the resistance to rice sheath blight causing by Rhizoctonia solani (R. solani), but ferulic acid and chlorogenic acid involved in disease resistance with Si application on is scarcely known. The susceptible cultivar Ningjing 1 was selected to determine the effects of Si on disease index of rice sheath blight as well as if ferulic acid and chlorogenic acid were involved in disease resistance. The results showed that Si application reduced the disease index of sheath blight by 15.62. For uninoculated plants, Si application alone did not change the concentration of ferulic acid and chlorogenic acid significantly. For inoculated plants, Si application increased the concentration of ferulic acid and chlorogenic acid significantly. It is conclued that the important way of Si mediated resistance in rice against sheath blight is probably through increasing ferulic acid and chlorogenic acid.