To further investigate the role of the ET response in Si-induced defense against M. graminicola, ethylene level and nematode infection in two transgenic plants, OsEIL1–2-RNAi, which causes deficiencies in ET signaling, and OsEIL1-OX, which increases ET signaling by 15- to 20-fold [56], were investigated at different time points. Here, HCRT is linked to Nematoda infectious disease.