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.

中文翻译：

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普通豚草（Ambrosia artemisiifolia L.）阿特拉津抗性的分子特征。

豚草 ( Ambrosia artemisiifolia L.) 是喀尔巴阡盆地最常见的杂草，在欧洲其他地区迅速蔓延。近年来，除野生型外，还进化出一种对莠去津除草剂具有抗性的突变基因型，现已在许多地区广泛传播。本研究表明豚草的阿特拉津抗性是母系遗传的，是由psb 中的点突变引起的。叶绿体基因。分析启动子5'-非翻译区和基因的开放阅读框区，并进行同源性搜索。阿特拉津抗性和易感 cpDNA 类型均存在于阿特拉津抗性植物中，而同一植物中两种基因型的混合存在（称为异质性）在易感植物中无法明确检测到。