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. 1990 Apr;92(4):1081-5.
doi: 10.1104/pp.92.4.1081.

A Mutation Causing Imidazolinone Resistance Maps to the Csr1 Locus of Arabidopsis thaliana

G W Haughn  1 , C R Somerville
Affiliations

A Mutation Causing Imidazolinone Resistance Maps to the Csr1 Locus of Arabidopsis thaliana

G W Haughn et al. Plant Physiol. 1990 Apr.

Abstract

A mutant of Arabidopsis thaliana, two hundred times more resistant to the imidazolinone herbicide imazapyr than wild-type plants, was isolated by direct selection of seedlings from a mutagenized population. Genetic analysis showed that resistance is due to a single dominant nuclear mutation that could not be separated by recombination from a mutation in the CSR1 gene encoding acetohydroxy acid synthase. Acetohydroxy acid synthase activity in extracts isolated from the mutant was 1000-fold more resistant to inhibition by imazapyr than that of the wild type. The resistant enzyme activity cosegregated with whole plant resistance. These data strongly suggest that the mutation is an allele of CSR1 encoding an imazapyr-resistant AHAS.

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References

    1. EMBO J. 1988 May;7(5):1241-8 - PubMed
    1. Plant Physiol. 1988 Mar;86(3):863-7 - PubMed
    1. Proc Natl Acad Sci U S A. 1988 Sep;85(18):6856-60 - PubMed
    1. Proc Natl Acad Sci U S A. 1986 Jun;83(12):4418-22 - PubMed
    1. Science. 1985 Apr 12;228(4696):204-7 - PubMed

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