A new circumscription of the genus Varicellaria (Pertusariales, Ascomycota)
A new circumscription of the genus Varicellaria (Pertusariales, Ascomycota)
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DOI：
10.3897/mycokeys.4.3545
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发表时间：
2012-08
期刊：
影响因子：
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通讯作者：
I. Schmitt;J. Otte;S. Parnmen;Anna D. Sadowska-Deś;R. Luecking;T. Lumbsch
中科院分区：
文献类型：
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作者：
I. Schmitt;J. Otte;S. Parnmen;Anna D. Sadowska-Deś;R. Luecking;T. Lumbsch
地衣形成的属Pertusaria在其目前的界限是多系和其系统发育关系是不确定的。本文研究了以蜡蚧酸为主要成分的百日咳菌属和水痘菌属的菌种，它们的子囊盘呈圆形，子囊淀粉样变强，子实层凝胶非淀粉样变强，子囊1-2孢子，子囊孢子1 - 2细胞，壁厚1层。我们推断系统发育关系，使用最大似然法和贝叶斯分析的基础上的四个分子位点（mtSSU，nuLSU rDNA，和蛋白质编码，核RPB 1和MCM 7基因）。我们的研究结果表明，含蜡蚧酸的物种形成了一个良好的支持，单系群，这是唯一的远亲，百日咳属。STR。该分支的系统发育位置尚不清楚，但放置在百日咳属。Varicellaria属的范围扩大到包括具有无隔子囊孢子的物种。该属已知7种：Varicellaria culbersonii（Vapezda）施密特& Lumbsch，comb. nov.，V. hemisphaerica（Flörke）施密特& Lumbsch，comb. nov.，V. kasandjeffii（Szatala）施密特& Lumbsch，comb. nov.，乳酸弧菌（V. lactea L.）施密特和伦布什，comb. nov.，菲律宾葡萄V. philippina（Vain.）施密特和伦布什，comb. nov.，红实V. rhodocarpa（Körb.）日神父，和V. velata（Turner）施密特& Lumbsch，comb. nov.
The lichen-forming genus Pertusaria under its current circumscription is polyphyletic and its phylogenetic affiliations are uncertain. Here we study the species of the genera Pertusaria and Varicellaria which contain lecanoric acid as major constituent, have disciform apothecia, strongly amyloid asci, non-amyloid hymenial gel, 1-2-spored asci, and 1or 2-celled ascospores with thick, 1-layered walls. We infer phylogenetic relationships using maximum likelihood and Bayesian analyses based on four molecular loci (mtSSU, nuLSU rDNA, and the protein-coding, nuclear RPB1 and MCM7 genes). Our results show that the lecanoric acid-containing species form a well-supported, monophyletic group, which is only distantly related to Pertusaria s.str. The phylogenetic position of this clade is unclear, but placement in Pertusaria s.str. is rejected using alternative hypothesis testing. The circumscription of the genus Varicellaria is enlarged to also include species with non-septate ascospores. Seven species are accepted in the genus: Varicellaria culbersonii (Vězda) Schmitt & Lumbsch, comb. nov., V. hemisphaerica (Flörke) Schmitt & Lumbsch, comb. nov., V. kasandjeffii (Szatala) Schmitt & Lumbsch, comb. nov., V. lactea (L.) Schmitt & Lumbsch, comb. nov., V. philippina (Vain.) Schmitt & Lumbsch, comb. nov., V. rhodocarpa (Körb.) Th. Fr., and V. velata (Turner) Schmitt & Lumbsch, comb. nov. A key to the species of Varicellaria is provided.