Plenodomus species infecting oilseed rape in Russia

M. Gomzhina, E. Gasich
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Abstract

The Phoma disease (Phoma stem canker, black leg, Phoma leaf spot) is one of the most harmful diseases of oilseed rape and other Brassicaceae in the world, particularly in Russia. The causal agents of this disease are Plenodomus biglobosus and Plenodomus lingam. Since 2005, a number subclades have been described within P. biglobosus and P. lingam (2 and 7, respectively). These subclades can be identified by multilocus sequence analysis. So far, biodiversity and geographic distribution of Plenodomus spp. infecting oilseed rape in Russia, have not been comprehensively analyzed. For this study, as many as 18 Plenodomus spp. isolates were obtained from the samples of stem canker and leaf spot of oilseed rape from four regions of Russia in 2004–2021. The aims of this study were to identify the isolates by phylogenetic analyses inferred from 3 gene sequences: nuclear ribosomal internal transcribed spacer, actin, and β-tubulin, and to assess pathogenicity of the isolates. The phylogenetic reconstructions revealed two well-supported monophyletic clades corresponding to the two species of the genus Plenodomus., P. lingam ‘brassicae’ and P. biglobosus ‘brassicae’.This paper provides robust phylogeny of the Plenodomus spp. clade, accompanied with the detailed description of morphological features of both species, and results of pathogenicity tests.
俄国油菜的卷翅虫
鸢尾病(鸢尾茎溃疡病、黑腿病、鸢尾叶斑病)是世界上油菜及其他芸苔科植物最严重的病害之一,在俄罗斯尤为严重。本病的病原是大叶卷腹虫和林根卷腹虫。自2005年以来,在P. biglobosus和P. lingam中分别发现了2个和7个亚支系。这些亚支可以通过多位点序列分析来识别。到目前为止,俄罗斯油菜侵染菌的生物多样性和地理分布尚未得到全面分析。本研究从2004-2021年俄罗斯4个地区的油菜茎溃疡病和叶斑病样本中分离得到18株Plenodomus spsp .。本研究的目的是通过核糖体内转录间隔序列、肌动蛋白和β-微管蛋白3个基因序列的系统发育分析来鉴定分离株,并评估分离株的致病性。系统发育重建显示了两个支持良好的单系分支,对应于Plenodomus属的两个种。, P. lingam ' brassicae '和P. biglobosus ' brassicae '。本文提供了丰富的系统发育,并详细描述了两个物种的形态特征和致病性测试结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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