Taxonomy and phylogenetic position of Fomitiporia torreyae, a causal agent of trunk rot on Sanbu-sugi, a cultivar of Japanese cedar (Cryptomeria japonica) in Japan
Taxonomy and phylogenetic position of Fomitiporia torreyae, a causal agent of trunk rot on Sanbu-sugi, a cultivar of Japanese cedar (Cryptomeria japonica) in Japan
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DOI：
10.3852/13-045
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发表时间：
2014-01-01
期刊：
影响因子：
2.8
通讯作者：
Sotome, Kozue
中科院分区：
文献类型：
--
作者：
Ota, Yuko;Hattori, Tsutomu;Sotome, Kozue
柳杉是日本柳杉最重要的经济品种之一，树干腐烂病对柳杉造成了严重威胁。这种疾病的病因，包括其主要代理人，是不完全知道。这种树干腐烂病是由Fomitiporia（Auslinus）hartianus或F.（linus）punctata.在这里，我们从树干腐烂症状分离的一组菌株，并恢复了一个单一的，单系的分支，表明一个单一的分类群参与的四个标记的DNA序列进行了遗传分析。这个分支被鉴定为Fomitiporia torreyae，一个在中国东部描述的物种。这一分析也证明了其他针叶树和阔叶树的干腐病和/或枯梢病，包括泽原柏（Chamaaparis pisifera）、日本伞松（Sciadopitys verticillata）和日本梨（Pyrus pyrifolia var.（三）是由同一物种引起的。对层孔菌属的系统发育分析表明，F. torreyae分支与F. bannaensis与F. punctata，这最初被认为是三武杉树干腐烂的原因。根据来自日本和中国的40多个寄主的标本重新描述了Fomitiporia torreyae。提出了杜松层孔菌Fomitiporia juniperina comb. nov.。
Trunk rot poses a substantial threat to Sanbu-sugi, one of the most economically important cultivars of Japanese cedar (Cryptomeria japonica). The etiology of this disease, including its main agents, is incompletely known. This trunk rot was attributed to Fomitiporia (Phellinus) hartigii or F. (Phellinus) punctata. Here we phylogenetically analyzed DNA sequences of four markers from a set of strains isolated from trunk-rot symptoms and recovered a single, monophyletic clade, indicating that a single taxon is involved. This clade was identified as Fomitiporia torreyae, a species described from eastern China. This analysis also proved that trunk rot and/or dieback of other conifers and broadleaf trees, including Sawara cypress (Chamaecyparis pisifera), Japanese umbrella pine (Sciadopitys verticillata) and Japanese pear (Pyrus pyrifolia var. culta), were caused by the same species. The phylogenetic approach to Fomitiporia revealed that the F. torreyae clade was closely related to F. bannaensis but clearly distinct from F. punctata, which originally was thought to be the cause of trunk rot in Sanbu-sugi. Fomitiporia torreyae is redescribed on the basis of more than 40 specimens from multiple hosts from Japan and China. Fomitiporia juniperina comb. nov. is proposed.