Phylogeny and taxonomy of the genus Abundisporus (Polyporales, Basidiomycota)
Phylogeny and taxonomy of the genus Abundisporus (Polyporales, Basidiomycota)
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DOI：
10.1007/s11557-015-1062-y
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发表时间：
2015-06-01
影响因子：
2.4
通讯作者：
Cui, Bao-Kai
中科院分区：
文献类型：
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作者：
Zhao, Chang-Lin;Chen, Hong;Cui, Bao-Kai
对该属植物进行了系统发育和分类研究。根据内部转录间隔区（ITS）、核糖体大亚基RNA基因（nLSU）、线粒体小亚基rRNA基因序列（mtSSU）和翻译延伸因子1- α基因（tef1）等多个位点的DNA序列进行系统发育推断，目前Abundisporus概念下的物种代表了一个单系谱系，属于核心多poroid进化支。该属的形态特征是具复盖到具毛的担子果，具有苍白的数量到深紫褐色或灰色到数量棕色的背景；一种二聚体菌丝结构，具有黄色到浅棕色的骨架菌丝；淡黄色，非糊精状，椭圆形担子孢子具稍厚的壁；以及在KOH中变成棕色的组织。该属已发现7个分类群，并有形态学和分子学证据。这里描述了一个新种，A. mollissimus。该新种具有软质、多年生、渗出反射到绒毛的担子果皮、二聚体菌丝系统，具有糊精样、嗜蓝且较窄的骨状菌丝，以及椭圆形担子孢子，大小为4-4.5 × 3-3.5 μ m。
Phylogenetic and taxonomic studies of Abundisporus were carried out. Inferred from phylogenies based on DNA sequences of multiple loci including the internal transcribed spacer (ITS) regions, the large subunit nuclear ribosomal RNA gene (nLSU), the small subunit mitochondrial rRNA gene sequences (mtSSU) and the translation elongation factor 1-alpha gene (tef1), species falling under the current concept of Abundisporus represent a monophyletic lineage, which belongs to the core polyporoid clade. The genus is morphologically characterized by resupinate to pileate basidiocarps with pale umber to deep purplish brown or greyish to umber brown context; a dimitic hyphal structure with yellow to pale brown skeletal hyphae; pale yellowish, non-dextrinoid, ellipsoid basidiospores with slightly thick walls; and tissues that turn brown in KOH. Seven taxa have been recognized in the genus with both morphological and molecular evidence. A new species, A. mollissimus, is described here. The new species is characterized by its soft, perennial, effused-reflexed to pileate basidiocarp, a dimitic hyphal system with dextrinoid, cyanophilous and narrower skeletal hyphae, and ellipsoid basidiospores measuring 4-4.5x3-3.5 mu m. Illustrated descriptions and a key to all species in this genus are provided.