Phylogenetic and chemotaxonomic resolution of the genus Annulohypoxylon (Xylariaceae) including four new species
Phylogenetic and chemotaxonomic resolution of the genus Annulohypoxylon (Xylariaceae) including four new species
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DOI：
10.1007/s13225-016-0377-6
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发表时间：
2017-07-01
期刊：
影响因子：
20.3
通讯作者：
Stadler, Marc
中科院分区：
文献类型：
--
作者：
Kuhnert, Eric;Sir, Esteban B.;Stadler, Marc
本研究涉及一个广泛的评价，重点是系统发育和化学分类学亚属的关系，属Annulohypoxylon（炭角菌科，子囊菌门），其物种普遍与种子植物的内生菌和saprotrophs在世界上所有的森林地区。利用系统发育、化学分类和形态学资料，将该属内的各种变种提升到种的水平，从而产生了A. areolatum（相当于A.博韦湾microsporum）、A. macrosporum（相当于A.莱普塔斯库姆湾macrosporum），和A. microdiscum（相当于A.桑形变种microdiscum）。Annulohypoxylon substygium nom. nov.应用于A.斯蒂吉姆变种annulatum和4个热带亚热带新种A. Alzheimer，A. violaceopigmentum、紫黑A. viridistectum和A. yungensis等。此外，A. leucadendri由于其形态特征与属的概念不一致而被排除在属之外，最近建立的A. palmicola与A. leptascum和A. austrobahiense已被重新归类为Hypoxylon属。此外，还对A. annulatum和A. truncatum已经被重新研究并定义了表位型。首次提供了该属的二分检索表。系统发育的β-微管蛋白树结合基质HPLC图谱清楚地表明，Annulohypoxylon包括两个不同的谱系。助理随着进一步的分子数据的获得，cohaerens/multiforme群可能最终保证分离成一个新的属。
This study deals with an extensive evaluation focusing on phylogenetic and chemotaxonomic infrageneric relationships of the genus Annulohypoxylon (Xylariaceae, Ascomycota), whose species are ubiquitously associated with seed plants as endophytes and saprotrophs in all forested areas of the world. Using evidence from phylogenetic, chemotaxonomic and morphological data, various varieties within the genus are raised to species level, leading to the new combinations for A. areolatum (equivalent to A. bovei var. microsporum), A. macrosporum (equivalent to A. leptascum var. macrosporum), and A. microdiscum (equivalent to A. moriforme var. microdiscum). Annulohypoxylon substygium nom. nov. is applied for A. stygium var. annulatum and the four new tropical and subtropical species A. massivum, A. violaceopigmentum, A. viridistratum and A. yungensis are introduced. Furthermore, A. leucadendri is excluded from the genus as its morphological characters disagree with the generic concept, the recently erected A. palmicola is synonymized with A. leptascum and A. austrobahiense has been reassigned to the genus Hypoxylon. In addition, the key taxa A. annulatum and A. truncatum have been reinvestigated and epitypes have been defined. For the first time, a dichotomous key to the genus is provided. A phylogenetic beta-tubulin tree in conjunction with stromatal HPLC profiles clearly shows that Annulohypoxylon comprises two distinct lineages. The A. cohaerens/multiforme group might eventually warrant segregation into a new genus as further molecular data become available.