ARS | Publication request: REGISTRATION OF KATY LESION MIMIC MUTANT

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 31, 2005
Publication Date: June 24, 2005
Citation: Jia, Y. 2004. Registration of Katy lesion mimic mutant. Crop Science. 45:1675.

Interpretive Summary: We are developing useful genetic stocks for understanding molecular mechanisms of disease resistance using US rice. An ethyl methane sulfonate induced lesion-mimic mutant 1 (LMM1) of Katy rice was reported in this study. This mutant develops spontaneous lesions that resemble hypersensitive cell death (HR) even in the absence of pathogen attack. HR is a form of rapid plant defense response to the pathogen. The lesion mimic phenotypes resembling HR imply that they may represent steps involved in normal response pathways triggered by pathogen infection. Genetic analy7sis indicated that lesion-mimic phenotype segregated as a single recessive gene. Further analysis of LMM1 will lead to a better understanding of mechanisms of resistant pathways and programmed cell death in plants.

Technical Abstract: Lesion mimic mutants develop spontaneous lesions that resemble hypersensitive cell death (HR) even in the absence of pathogen attack. HR is a form of rapid plant defense response to the pathogen. The lesion mimic phenotypes resembling HR imply that they may represent steps involved in normal response pathways triggered by pathogen infection. Therefore, lesion-mimic mutants are useful for investigating mechanisms of disease resistance and programmed cell death in plants. An ethyl methane sulfonate induced lesion-mimic mutant 1 (LMM1) of Katy was reported in this study. Genetic analysis indicated that lesion-mimic phenotype segregated as a single recessive gene. Further analysis of LMM1 will lead to a better understanding of mechanisms of resistant pathways and programmed cell death in plants.