Qin W T, Zhuang W Y
State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
Mycologia. 2016 Jan-Feb;108(1):205-14. doi: 10.3852/15-144. Epub 2015 Nov 17.
Collections of hypocrealean fungi found on decaying wood in subtropical regions of China were examined. Two new species, Trichoderma confluens and T. hubeiense, were discovered and are described. Trichoderma confluens is characterized by its widely effuse to rarely pulvinate, yellow stromata with densely disposed yellowish brown ostioles, simple acremonium- to verticillium-like conidiophores, hyaline conidia and multiform chlamydospores. Trichoderma hubeiense has pulvinate, grayish yellow stromata with brownish ostioles, trichoderma- to verticillium-like conidiophores and hyaline conidia. The phylogenetic positions of the two fungi were investigated based on sequence analyses of RNA polymerase II subunit b and translation elongation factor 1-α genes. The results indicate that T. confluens belongs to the Hypocreanum clade and is associated with but clearly separated from T. applanatum and T. decipiens. Trichoderma hubeiense belongs to the Polysporum clade and related to T. bavaricum but obviously differs from other members of the clade in sequence data. Morphological distinctions between the new species and their close relatives are noted and discussed.
对在中国亚热带地区腐朽木上发现的肉座菌目真菌进行了研究。发现并描述了两个新物种，即融合木霉（Trichoderma confluens）和湖北木霉（T. hubeiense）。融合木霉的特征在于其广泛扩散至很少呈垫状，黄色子座具密集排列的黄褐色小孔，分生孢子梗简单，呈枝顶孢状至轮枝状，分生孢子透明，厚垣孢子形态多样。湖北木霉具垫状、灰黄色子座，具褐色小孔，分生孢子梗呈木霉状至轮枝状，分生孢子透明。基于RNA聚合酶II亚基b和翻译延伸因子1-α基因的序列分析，研究了这两种真菌的系统发育位置。结果表明，融合木霉属于肉座菌分支，与平展木霉（T. applanatum）和欺骗木霉（T. decipiens）相关但明显分开。湖北木霉属于多孢分支，与巴伐利亚木霉（T. bavaricum）相关，但在序列数据上明显不同于该分支的其他成员。注意并讨论了新物种与其近缘种之间的形态差异。
