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首页> 外文期刊>Mycologia >Evolutionary analysis of the powdery mildew fungi using nucleotide sequences of the nuclear ribosomal DNA.
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Evolutionary analysis of the powdery mildew fungi using nucleotide sequences of the nuclear ribosomal DNA.

机译：使用核糖体DNA核苷酸序列对白粉病真菌进行进化分析。

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摘要

The nucleotide sequences of the nuclear ribosomal DNA including 18S, 5.8S and 28S rDNA and the internal transcribed spacer regions were determined for 33 powdery mildew taxa spanning 15 genera to infer the phylogenetic relationships for these fungi.Phylogenetic analyses revealed that Uncinula septata was placed in the primitive base to the large clade composed of all other powdery mildew taxa. Powdery mildews excluding U. septata were split into 5 major lineages. The Pseudoidium lineage consistedof 6 genera, i.e., Erysiphe, Microsphaera, Uncinula, Uncinuliella, Brasiliomyces and Typhulochaeta, all of which are characterized by polyascal cleistothecia and Pseudoidium-type anamorph. The Eudoidium lineage consisted of 3 Erysiphe species (E. cichoracearum, E. orontii and E. galeopsidis) and Arthrocladiella mougeotii, which are characterized by polyascal cleistothecia and Euoidium-type anamorph. The endophytic lineage consisted of 2 Phyllactinia species (P. moricola and P. kakicola), Leveillula taurica and Pleochaeta shiraiana, which are characterized by the presence of endophytic or partly endophytic mycelia. The fibrosin lineage consisted of the genera Sawadaea, Cystotheca, Podosphaera and Sphaerotheca, all of which are characterized by the presence of well-developed fibrosin bodies in the conidia and conidiophores. The monocot lineage consisted of a single species, Blumeria graminis, which is well characterized by being parasitic to monocots, especially to cereal plants. Character polarizationwas discussed on several major characteristics. The mycelioid appendage which has long been regarded as an ancestral character may be a derived character as a result of an event that may have occurred multiple times independently due to convergence. Euoidium-type anamorph and clavate appressorial germ tube are considered to be ancestral characters to Pseudoidium-type anamorph and lobed germ tube. Ectophytic nature and polyascal cleistothecia are also regarded as ancestral features to endophytic nature and monoascal cleistothecia.
机译：确定了15个属的33个白粉病类群的核糖体DNA的核苷酸序列（包括18S，5.8S和28S rDNA）以及内部转录的间隔区，以推断这些真菌的系统亲缘关系。它是由所有其他白粉病类群组成的大型进化枝的原始基地。不包括七叶草的白粉病分为5个主要谱系。假单胞菌谱系由6个属组成，即，Erysiphe，Microsphaera，Uncinula，Uncinuliella，Brasiliomyces和Typhulochaeta，所有这些均以多头型鞘膜病和假单胞菌型无性型为特征。 udo族谱系由3种E属（E. cichoracearum，E。orontii和E. galeopsidis）和Arthrocladiella mougeotii组成，它们的特征是多齿型鞘膜上皮和Euoidium型无性型。内生谱系由2种毛木兰属（P. moricola和P. kakicola），Leveillula taurica和Pleochaeta shiraiana组成，其特征是存在内生或部分内生菌丝体。纤维蛋白谱系由Sawadaea，Cystotheca，Podosphaera和Sphaerotheca属组成，所有这些都以在分生孢子和分生孢子中存在成熟的纤维蛋白体为特征。单子叶植物谱系由单一物种Blumeria graminis组成，其特征是寄生于单子叶植物，特别是谷物植物。讨论了字符极化的几个主要特征。长期以来一直被认为是祖先特征的类胡萝卜素附肢可能是由于可能由于会聚而独立发生多次的事件的结果而衍生的特征。假单胞菌型无性型和叶状胚芽管被认为是祖先型的无性型和棒状附生生殖管。赘生性和多齿型毛囊性上皮性也被认为是内生性和单齿性毛囊性上皮性的祖先特征。

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