Symptoms of general wilting and yellowing were found affecting Beta vulgaris L. (sugar beet, fodder beet and chard) in the Argentinean region of Bahía Blanca (Buenos Aires province), Valle Medio, and Valle Inferior de Rio Negro (Patagonia region). PCR amplification of the 16S rRNA region showed presence of phytoplasma in approximately 80% of the samples from symptomatic plants. Phylogenetic analyses revealed the presence of phytoplasmas of the 16SrIII-J subgroup. This is the first molecular evidence of phytoplasmas associated with yellow wilt disease in B. vulgaris in Argentina.

中文翻译：

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与阿根廷甜菜相关的 16SrIII-J 亚群植原体

在 Bahía Blanca（布宜诺斯艾利斯省）、Valle Medio 和 Valle Inferior de Rio Negro（巴塔哥尼亚地区）的阿根廷地区发现了普遍萎蔫和泛黄的症状。16S rRNA 区域的 PCR 扩增表明，大约 80% 的有症状植物样品中存在植原体。系统发育分析表明存在 16SrIII-J 亚群的植原体。这是阿根廷普通 B. vulgaris 黄萎病相关植原体的第一个分子证据。