Yang Qin, Jiang Ning, Tian Cheng-Ming
Forestry Biotechnology Hunan Key Laboratories, Central South University of Forestry and Technology, Changsha 410004, China Beijing Forestry University Beijing China.
The Key Laboratory for Silviculture and Conservation of the Ministry of Education, Beijing Forestry University, Beijing 100083, China Central South University of Forestry and Technology Changsha China.
MycoKeys. 2020 Jul 10;69:71-89. doi: 10.3897/mycokeys.69.54012. eCollection 2020.
Species of Gnomoniaceae are commonly associated with leaf spot diseases of a wide range of plant hosts worldwide. During our investigation of fungi associated with tree diseases in China, several gnomoniaceous isolates were recovered from symptomatic branches and leaves on different woody plants in the Fagaceae, Pinaceae, and Salicaceae families. These isolates were studied by applying a polyphasic approach including morphological, cultural data, and phylogenetic analyses of partial ITS, LSU, , and gene sequences. As a result, three species were identified with characters fitting into the family Gnomoniaceae. One of these species is described herein as , characterized by developed pseudostromata and ascospores with obvious hyaline sheath; is illustrated showing sympodially branched conidiophore, oval or fusiform conidia; and one known species, . The current study improves the understanding of gnomoniaceous species causing diebacks and leaf spot on ecological and economic forest trees.
格孢腔菌科的物种通常与世界各地多种植物寄主的叶斑病有关。在我们对中国树木病害相关真菌的调查中，从壳斗科、松科和杨柳科不同木本植物上有症状的枝条和叶片中分离出了几株格孢腔菌科菌株。通过多相方法对这些分离株进行了研究，包括形态学、培养数据以及对部分ITS、LSU、 和 基因序列的系统发育分析。结果，鉴定出三个符合格孢腔菌科特征的物种。其中一个物种在此被描述为 ，其特征为发育良好的假子座和具明显透明鞘的子囊孢子； 展示了其呈合轴分枝的分生孢子梗、椭圆形或梭形分生孢子；还有一个已知物种， 。当前的研究增进了我们对导致生态和经济林木枯死和叶斑的格孢腔菌科物种的了解。
