具有厚壁孢梗束状分生孢子梗的Hypocrea/Trichoderma 种：T. minutisporum 和 T. polysporum 的有性型及其新发现的亲缘种。

Hypocrea/Trichoderma species with pachybasium-like conidiophores: teleomorphs for T. minutisporum and T. polysporum and their newly discovered relatives.

机构信息

Department of Plant Pathology, Agronomy College, Shanxi Agricultural University, Taigu, Shanxi 030801, China.

出版信息

Mycologia. 2004 Mar-Apr;96(2):310-42.

Abstract

We describe or redescribe species of Hypocrea/Trichoderma (Ascomycetes, Hypocreales) having hyaline ascospores and pachybasium-like conidiophores. Teleomorphs are reported for Trichoderma minutisporum (Hypocrea minutispora sp. nov.) and T. polysporum (H. pachybasioides). Hypocrea pilulifera/T. piluliferum is redescribed. Trichoderma croceum is synonymized with T. polysporum. The new species H. parapilulifera, H. stellata and H. lacuwombatensis are described. All of these species fall within the morphological concept of Trichoderma sect. Pachybasium and within the phylogenetic group pachybasium B5 of Kullnig-Gradinger et al (2002). Parsimony analysis of nucleotide sequences from three unlinked loci-ITS1 and 2, endochitinase (ech42) and translation elongation factor 1-alpha (tef1)-detects two distinct phylogenetic lineages within the group pachybasium B5. One comprises H. pachybasioides/T. polysporum, H. pilulifera/T. piluliferum, H. parapilulifera and H. stellata; this group, the "polysporum" lineage, is characterized by having conidia that are white in mass and is the only lineage within Hypocrea characterized by such conidia. The second group includes the green conidial T. minutisporum and H. lacuwombatensis. The partition homogeneity test reveals significant recombination within the "polysporum" lineage but not within the "minutisporum" lineage.

摘要

我们描述或重新描述了具有透明子囊孢子和厚壁分生孢子梗的 Hypocrea/Trichoderma（子囊菌门，Hypocreales）物种。报道了 Trichoderma minutisporum（Hypocrea minutispora sp. nov.）和 T. polysporum（H. pachybasioides）的有性型。重新描述了 Hypocrea pilulifera/T. piluliferum。将 Trichoderma croceum 与 T. polysporum 归为同义词。描述了新种 Hypocrea parapilulifera、H. stellata 和 H. lacuwombatensis。所有这些物种都属于 Trichoderma sect. Pachybasium 的形态概念，并且属于 Kullnig-Gradinger 等人（2002）的 pachybasium B5 系统发育群。从三个不相关的基因座（ITS1 和 2、内切几丁质酶（ech42）和翻译延伸因子 1-α（tef1））的核苷酸序列进行简约分析，检测到 pachybasium B5 组内存在两个不同的系统发育谱系。一个包含 H. pachybasioides/T. polysporum、H. pilulifera/T. piluliferum、H. parapilulifera 和 H. stellata；这个组，即“polysporum”谱系，其特征是具有白色的分生孢子，这是 Hypocrea 中唯一具有这种分生孢子的谱系。第二个组包括绿色分生孢子的 T. minutisporum 和 H. lacuwombatensis。分区同质性检验显示“polysporum”谱系内存在显著的重组，但在“minutisporum”谱系内不存在。