Biodiversity of Colletotrichum spp. on Several Wild and Cultivated Plants

Biology Bulletin Reviews Pub Date : 2023-12-01 DOI:10.1134/s2079086423070071

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Abstract—The genus Colletotrichum includes a number of plant pathogens of major importance, causing diseases in a broad variety of woody and herbaceous plants. Due to recent molecular analysis, Colletotrichum spp. have undergone many taxonomic changes, i.e., introduction of a significant number of new species and abolition of some old ones. The data on the species diversity, abundance and host specialization of species in this genus on the territory of Russia and neighboring countries are obviously far from being complete, do not correspond to the modern taxonomy of the genus and require substantial revision. In this work, the molecular genetic identification and pathogenicity assessment of 35 isolates, previously identified as Colletotrichum spp., from the European part of Russia, Ukraine, Siberia, and the Russian Far East were carried out. It has been found that 12 isolates obtained from wild plants and crops belong to the species Colletotrichum coccodes. The remaining isolates belong to destructivum (14 isolates) and dematium (9 isolates) species complexes. Among the members of the destructivum complex, it was possible to identify the species C. destructivum and C. lini. C. dematium, C. lineola and Colletotrichum cf. spinaciae were defined among the isolates of the dematium complex. Three isolates of C. destructivum from wild plants of Leningrad oblast and Kamchatka, to our knowledge, are the first findings of this species for Russia. According to the results of the pathogenicity assessment, three isolates assigned to the destructivum species complex may be of interest for the biocontrol of Galinsoga parviflora, and one isolate identified as С. coccodes may be potentially used for the control of Ambrosia artemisiifolia.

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几种野生和栽培植物上 Colletotrichum 菌属的生物多样性

摘要：Colletotrichum 属包括许多重要的植物病原体，可引起多种木本和草本植物的病害。由于最近的分子分析，Colletotrichum 属经历了许多分类上的变化，即引入了大量新种，废除了一些旧种。有关该属物种在俄罗斯及其邻国境内的多样性、丰度和寄主专一性的数据显然远不够完整，与该属的现代分类法不符，需要进行大量修订。在这项工作中，对之前从俄罗斯欧洲地区、乌克兰、西伯利亚和俄罗斯远东地区鉴定为 Colletotrichum spp.的 35 个分离株进行了分子遗传鉴定和致病性评估。结果发现，从野生植物和农作物中获得的 12 个分离株属于 Colletotrichum coccodes 菌种。其余的分离物属于 destructivum（14 个分离物）和 dematium（9 个分离物）种群。在 destructivum 复合体成员中，可以鉴定出 C. destructivum 和 C. lini。在dematium复合体的分离物中，确定了C. dematium、C. lineola和Colletotrichum cf. spinaciae。据我们所知，从列宁格勒州和堪察加半岛的野生植物中分离出的三株破坏疫霉（C. destructivum）是俄罗斯首次发现该物种。根据致病性评估结果，属于 destructivum 物种复合体的三个分离物可能对 Galinsoga parviflora 的生物防治有意义，一个被鉴定为 С. coccodes 的分离物可能用于防治 Ambrosia artemisiifolia。

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Biology Bulletin Reviews

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