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首页> 外文期刊>Forest Pathology >Fungi in foliage and shoots of Fraxinus excelsior in eastern Ukraine: a first report on Hymenoscyphus pseudoalbidus
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Fungi in foliage and shoots of Fraxinus excelsior in eastern Ukraine: a first report on Hymenoscyphus pseudoalbidus

机译：乌克兰东部优质白蜡树的枝叶中的真菌：关于假单胞菌的首次报道

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摘要

In eastern Ukraine, the first symptoms of dieback on common ash (Fraxinus excelsior) were observed in 2010, as sparse flushing of leaves, bark necrosis and wood discoloration of shoots. The aim of this study was to assess possible causal agents of the damage by studying fungal communities in both symptomatic and healthy-looking shoots, and leaf petioles. Field sampling was carried out in 2010 in Kharkiv and Sumy regions in eastern Ukraine and included 68 segments of symptomatic shoots, 68 segments of healthy-looking shoots and 240 segments of petioles. DNA isolation from individual segments and direct sequencing of fungal ITS rRNA resulted in 430 fungal sequences representing 29 distinct taxa. Results showed that Hymenoscyphus pseudoalbidus - the primary causal agent of ash dieback in Europe - was present at low proportion (5.6%) in symptomatic shoots. Other more frequently detected fungi were Epicoccum nigrum, Venturia fraxini, Colletotrichum truncatum, Aureobasidium pullulans, Alternaria alternata, Alternaria sp. and Lophiostoma corticola. In conclusion, the study reports on the first incidence of ash decline in the Ukraine and other possible causal agents of damage which may help to evaluate and forecast the future situation with F.excelsior stands in the region.
机译：在乌克兰东部，2010年观察到普通灰烬上的第一个回缩症状，原因是叶片稀疏泛红，树皮坏死和枝条变色。这项研究的目的是通过研究有症状和健康外观的枝条以及叶柄中的真菌群落来评估造成损害的可能原因。野外采样于2010年在乌克兰东部的哈尔科夫和苏梅地区进行，包括68个有症状的芽，68个健康的芽和240个叶柄。从各个片段中分离DNA并直接对真菌ITS rRNA进行测序，得出代表29个不同类群的430个真菌序列。结果表明，在有症状的芽中，欧洲灰men的主要病原体Hymenoscyphus pseudoalbidus的含量较低（5.6％）。其他更经常检测到的真菌是黑附球菌，法国文图拉菌，圆头炭疽菌，金黄色葡萄球菌，链格孢菌，链格孢菌。和皮质phiphiostoma。总而言之，该研究报告了乌克兰灰烬下降的首例事件以及其他可能的破坏原因，这些因素可能有助于评估和预测该地区优良细枝木的未来状况。

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