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首页> 外文期刊>Mycologia >Two novel Fusarium species that cause canker disease of prickly ash (Zanthoxylum bungeanum) in northern China form a novel Glade with Fusarium torreyae
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Two novel Fusarium species that cause canker disease of prickly ash (Zanthoxylum bungeanum) in northern China form a novel Glade with Fusarium torreyae

机译：导致中国北部花椒溃疡病的两种新型镰刀菌物种与镰刀镰刀菌一起形成了一种新型Glade

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摘要

Canker disease of prickly ash (Zanthoxylum bungeanum) has caused a decline in the production of this economically important spice in northern China in the past 25 y. To identify the etiological agent, 38 fungal isolates were recovered from symptomatic tissues from trees in five provinces in China. These isolates were identified by conducting BLASTN queries of NCBI GenBank and phylogenetic analyses of DNA sequence data from the nuclear ribosomal internal transcribed spacer region (ITS rDNA), a portion of the translation elongation factor 1-alpha (TEF1) gene, and genes encoding RNA polymerase II largest (RPB1) and second largest (RPB2) subunits. Results of these analyses suggested that 30/38 isolates belonged to two novel fusaria most closely related to the Florida torreya (Torreya taxifolia Arm.) pathogen, Fusarium torreyae in Florida and Georgia. These three canker-inducing tree pathogens form a novel Glade within Fusarium here designated the F torreyae species complex (FTOSC). BLASTN queries of GenBank also revealed that 5/38 isolates recovered from cankers represented an undescribed phylogenetic species within the F. solani species complex (FSSC) designated FSSC 6. Stem inoculations of three fusaria on Z bungeanum resulted in consistent canker symptomg from which these three fusaria were recovered. The two novel fusaria, however, induced significantly larger lesions than FSSC 6. Herein, the two novel prickly ash pathogeris are formally described as E zanthoxyli and F continuum.
机译：在过去的25年中，花椒溃疡病（Zanthoxylum bungeanum）导致这种经济上重要的香料在中国北方的产量下降。为了鉴定病原，从中国五个省份的树木的有症状组织中回收了38株真菌。这些分离物是通过对NCBI GenBank进行BLASTN查询，以及对核糖体内部转录间隔区（ITS rDNA），翻译延伸因子1-alpha（TEF1）基因的一部分以及编码RNA的基因的DNA序列数据进行系统发育分析而鉴定的聚合酶II最大（RPB1）和第二大（RPB2）亚基。这些分析的结果表明，30/38的分离物属于与佛罗里达州的torreya（Torreya taxifolia Arm。）病原体最密切相关的两种新颖的败类，在佛罗里达州和佐治亚州的torreyae。这三种诱导溃疡的树木病原体在镰刀菌内形成了一种新型的沼地，在这里被称为to科植物复合体（FTOSC）。 GenBank的BLASTN查询还显示，从枯萎病菌中分离出的5/38分离物代表了F. solani菌种复合体（FSSC）中未描述的系统发育种，命名为FSSC6。茎秆接种三个紫茎泽兰在Z蹦极上导致一致的溃疡病症状，这三者紫us被发现。然而，这两种新颖的镰刀菌引起的损伤明显大于FSSC6。在这里，这两种新颖的花椒病菌被正式描述为E zanthoxyli和F Continuousum。

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