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首页> 外文期刊>Plant Disease >Diversity of Diatrypaceae Species Associated with Dieback of Grapevines in South Africa, with the Description of Eutypa cremea sp. nov.
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Diversity of Diatrypaceae Species Associated with Dieback of Grapevines in South Africa, with the Description of Eutypa cremea sp. nov.

机译：南非葡萄树陷入困境的滴岩物种多样性，具有Eutypa Cremea Sp的描述。 11月。

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摘要

Recent studies in grape-growing areas including Australia, California, and Spain have revealed an extensive diversity of Diatrypaceae species on grapevines showing dieback symptoms and cankers. However, in South Africa, little is known regarding the diversity of these species in vineyards. The aim of this study was, therefore, to identify and characterize Diatrypaceae species associated with dieback symptoms of grapevine in South Africa. Isolates were collected from dying spurs of grapevines aged 4 to 8 years old, grapevine wood showing wedge-shaped necrosis when cut in cross section as well as from perithecia on dead grapevine wood. The collected isolates were identified based on morphological characters and phylogenetic analyses of the internal transcribed spacer region (ITS) and fS-tubulin gene. Seven Diatrypaceae species were identified on grapevine, namely Cryptovalsa ampelina, C. rabenhorstii, Eutypa consobrina,E. lata, E. cremea sp. nov., Eutypella citricola, and E. microtheca. The dying spurs yielded the highest diversity of species when compared with the wedge-shaped necrosis and/or perithecia. C. ampelina was the dominant species in the dying spurs, followed by E. citricola, whereas E. lata was the dominant species isolated from the wedge-shaped necroses and perithecia. These results confirm E. lata as an important grapevine canker pathogen in South Africa, but the frequent association of C. ampelina withspur die-back suggests that this pathogen plays a more prominent role in dieback than previously assumed. In some cases, more than one species were isolated from a single symptom, which suggests that interactions may be occurring leading to decline of grapevines. C. rabenhorstii, E. consobrina, E. citricola, E. microtheca, and E. cremea are reported for the first time on grapevine in South Africa.
机译：最近在包括澳大利亚，加利福尼亚州和西班牙在内的葡萄种植地区的研究揭示了葡萄藤上的曲折型物种，显示死刑症状和溃疡。然而，在南非，对葡萄园中这些物种的多样性很少。因此，本研究的目的是鉴定和表征与南非葡萄葡萄酒的沉浸症状相关的滴岩型物种。从4至8岁的葡萄葡萄藤的垂死运动中收集分离物，葡萄木头显示楔形坏死，当切成横截面以及从死葡萄木上的佩里其赛中切割。基于内部转录间隔区（ITS）和Fs-管蛋白基因的形态特征和系统发育分析来鉴定收集的分离物。在葡萄藤上鉴定出七种卵黄型涂层物种，即Cryptovalsa Ampelina，C.Rabenhorstii，Eutypa Canoobrina，E。 Lata，E. Cremea sp。 11月，Eutypella Citricola和E. Microtheca。与楔形坏死和/或杠铃相比，垂死的孢子产生了最高的物种。 C.Ampelina是垂死的马刺中的主要种类，其次是Citicola，而E. Lata是从楔形的坏死和杠杆分离的主要物种。这些结果证实了Lata作为南非的重要葡萄溃疡病原体，而是C.Ampelina的频繁关联与乳头背面的频繁协会表明，这种病原体在难以以前假设的重婚中发挥更加突出的作用。在某些情况下，从单一的症状中分离了多种物种，这表明可能发生相互作用导致葡萄的衰落。 C. Rabenhorstii，E. CAMOBRINA，E. CITRICOLA，E. MICROTHECA和E.Cremea在南非葡萄葡萄树上举报。

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  • 来源
    《Plant Disease》 |2018年第1期|共11页
  • 作者

    Providence Moyo; Lizel Mostert; Christoffel F.J. Spies; Ulrike Damm; Francois Halleen;

  • 作者单位

    Department of Plant Pathology University of Stellenbosch Matieland 7602 South Africa;

    Department of Plant Pathology University of Stellenbosch Matieland 7602 South Africa;

    Plant Protection Division ARC Infruitec-Nietvoorbji Stellenbosch 7599 South Africa;

    Senckenberg Museum of Natural History Gorlitz 02806 Gorlitz Germany;

    Plant Protection Division ARC Infruitec-Nietvoorbji Stellenbosch 7599 South Africa;

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  • 正文语种 eng
  • 中图分类 植物保护;
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