Abstract
AbstractIn plant-pathogen interactions, signal activation and transduction confer resistance in plants against various pathogens. Communication between host and pathogen is the prime step for a pathogen to cause infection. The molecular basis of pathogen response in plants depends on the pathogen types. Hypersensitive reactions usually result from Avr-R interactions that restrict pathogens’ development through cell death. These avr genes can be recognized directly and indirectly by the resistance (R) gene. The NBS-LRR family is an important resistance gene (R gene) family in plants, which is divided into subclasses. Resistant gene analogues (RGAs) are candidates for R genes that have a significant role in defense response against disease-causing pathogens and are classified into two classes. The first class is based on the immediate recognition of a pathogen called resistance genes (R genes), while the second class is based on the defense response generated by recognition events. Hence, this chapter attempts to delineate a comprehensive overview of resistance genes, their classes, identification, and characterization in plants.KeywordsDisease resistanceR genesResistance genes analogsPlant-pathogen interaction
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