The plant hypersensitive response (HR) is a rapid localized cell death that occurs at the point of pathogen penetration and is associated with disease resistance. While others had noted similar phenomena previously it is believed that E.C. Stakman (Stakman, 1915) first to use the term ‘hypersensitive’ mentioning the extreme resistance of certain grass hosts to Puccinia graminis, author said, “in such cases, the host plant is hypersensitive to fungi.
