Molecular characterization of atrazine resistance in common ragweed (Ambrosia artemisiifolia L.) |
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Authors: | A Cseh I Cernák J Taller |
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Institution: | 1. Georgikon Faculty, University of Pannonia, Deák Ferenc street 16, H-8360, Keszthely, Hungary
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Abstract: | Common ragweed (Ambrosia artemisiifolia L.) is the most frequent weed in the Carpathian Basin and is spreading fast in other parts of Europe. In recent years, besides
the wild type, a mutant genotype resistant to atrazine herbicides has evolved and is now widespread in many areas. The present
study demonstrates that the atrazine resistance of ragweed is maternally inherited, and is caused by a point mutation inthe psb A chloroplast gene. The promoter 5′-untranslated region and the open reading frame regions of the gene were analysed, and
a homology search was performed. Both the atrazine-resistant and susceptible types of cpDNA were present in atrazine-resistant
plants, while the mixed presence of both genotypes in the same plant, known as heteroplasmy, was not unequivocally detectable
in susceptible plants. |
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