The bacterium Acidovorax avenae causes disease in a wide range of economically important monocotyledonous and dicotyledonous plants, including corn, rice, watermelon, anthurium, and orchids. Genotypic and phenotypic relatedness among strains of phytopathogenic A. avenae subsp. avenae, A. avenae subsp. citrulli, A. avenae subsp. cattleyae and A. konjaci, as well as all other Acidovorax species, including A. facilis, the type strain of Acidovorax, was determined. The 16s rDNA sequencing confirmed previous studies showing the environmental species to be very distant from the phytopathogenic species. DNA/DNA reassociation assays on the different strains of A. avenae revealed four (A, B, C, and D) distinct genotypes. Taxon A included six A. avenae subsp. avenae strains from corn that had a mean reciprocal similarity of 81%; taxon B included six A. avenae subsp. avenae strains from rice that had a mean reciprocal similarity of 97%; taxon C contained 11 A. avenae subsp. citrulli strains from cucurbits (cantaloupe, watermelon, and pumpkin) that had a mean reciprocal similarity of 88%, and taxon D contained four A. avenae subsp. cattleyae strains from orchids that had a mean similarity of 98%. The mean reciprocal relatedness between taxa A, B, C, and D was less than 70%. Sequence analysis of 16S rDNA and the 16S-23S rDNA internally transcribed spacer region, as well as AFLP analysis, revealed the same four taxa. All four were easily differentiated phenotypically from each other and from all other recognized Acidovorax species. Strains of A. avenae did not contain 3-hydroxyoctanoic acid, which was found in all other species. On the basis of these and previous genetic and phenotypic results, we propose an emendation of the species A. avenae. A. avenae subsp. citrulli (C strains) and A. avenae subsp. cattleyae (D strains) should be elevated to species rank as A. citrulli and A. cattleyae, respectively. We further propose a new taxon for the B strains, A. oryzae sp. nov. with FC-143T = ICPB 30003T = ICMP 3960T = ATCC 19882T as the type strain.

中文翻译：

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酸果蝇亚种的重分类为A. Avenae（Manns 1905）emend。，A。cowyae（Pavarino，1911）梳。，A。citrulli Schaad等，1978）梳。十一月，和A. oryzae sp。的提案。十一月

Acidovorax avenae细菌在许多重要的单子叶和双子叶植物中引起疾病​​，包括玉米，水稻，西瓜，红掌和兰花。植物致病性A. avenae亚种菌株之间的基因型和表型相关性。avenae，A。avenae子亚种。citrulli，A。avenae亚种。确定了卡特兰科和魔芋A以及所有其他嗜酸杆菌属物种，包括嗜酸杆菌属菌株Facilis A.。16s rDNA测序证实了先前的研究，表明环境物种与植物致病物种之间的距离非常远。在不同的A. avenae菌株上进行的DNA / DNA重新关联测定揭示了四种（A，B，C和D）不同的基因型。分类群A包括六个A. avenae亚种。来自玉米的avenae菌株，其平均倒数相似度为81％；B类群包括六个A。燕麦科亚种 水稻的avenae菌株，其平均倒数相似度为97％；分类单元C包含11个avenae亚种。来自葫芦科（哈密瓜，西瓜和南瓜）的citrulli菌株的平均倒数相似度为88％，而分类群D包含四个A. avenae亚种。来自兰花的卡特兰菌株，平均相似度为98％。A，B，C和D类群之间的平均倒数相关性小于70％。内部转录的16S rDNA和16S-23S rDNA间隔区的序列分析以及AFLP分析揭示了相同的四个分类单元。这四种很容易在表型上彼此区分，也很容易与所有其他公认的嗜酸性菌种区分开。燕麦曲霉菌株不包含3-羟基辛酸，而在所有其他物种中都发现了3-羟基辛酸。根据这些以及先前的遗传和表型结果，我们提议对A. avenae物种进行修订。燕麦属亚种 citrulli（C株）和A. avenae亚种。应将卡特兰（D株）的物种等级分别提高至A. citrulli和A. cowyae。我们进一步为B株米曲霉（A. oryzae sp。）提出了一个新的分类单元。十一月 使用FC-143T = ICPB 30003T = ICMP 3960T = ATCC 19882T作为类型株。