Cytokinins/metabolism; Magnaporthe/metabolism; Oryza/immunology; Plant Diseases/immunology; Plant Growth Regulators/metabolism; Salicylic Acid/pharmacology; Cytokinins/analysis; Cytokinins/pharmacology; Drug Synergism; Gene Expression Regulation, Plant; Gene Knockdown Techniques; Host-Pathogen Interactions; Hyphae; Indoleacetic Acids/metabolism; Magnaporthe/physiology; Oryza/drug effects; Oryza/genetics; Oryza/metabolism; Plant Diseases/microbiology; Plant Growth Regulators/analysis; Plant Growth Regulators/pharmacology; Plant Immunity; Plant Leaves/drug effects; Plant Leaves/genetics; Plant Leaves/immunology; Plant Leaves/metabolism; Plant Proteins/genetics; Plant Proteins/metabolism; Plants, Genetically Modified; Promoter Regions, Genetic; RNA Interference; Seedlings/drug effects; Seedlings/genetics; Seedlings/immunology; Seedlings/metabolism; Signal Transduction; Spores, Fungal