Latest Articles from MycoKeys Latest 3 Articles from MycoKeys https://mycokeys.pensoft.net/ Thu, 28 Mar 2024 10:48:17 +0200 Pensoft FeedCreator https://mycokeys.pensoft.net/i/logo.jpg Latest Articles from MycoKeys https://mycokeys.pensoft.net/ Morphological characteristics and phylogenetic evidence reveal two new species and the first report of Comoclathris (Pleosporaceae, Pleosporales) on dicotyledonous plants from China https://mycokeys.pensoft.net/article/113040/ MycoKeys 101: 95-112

DOI: 10.3897/mycokeys.101.113040

Authors: Rong Xu, Wenxin Su, Yang Wang, Shangqing Tian, Yu Li, Chayanard Phukhamsakda

Abstract: Two novel Comoclathris species were identified from dicotyledonous plants (Clematis sp. and Xanthoceras sorbifolium) in China. The results were supported by morphological characters and Maximum Likelihood (ML) and Bayesian Inference (BI) analyses. Multi-gene phylogenetic analyses of the ITS, LSU, SSU and rpb2 sequences revealed two new species Comoclathris clematidis and C. xanthoceratis, which are phylogenetically distinct. The new species are phylogenetically closely related to C. arrhenatheri. However, they are distinguishable from C. arrhenatheri by having comparatively larger asci and ascospores. This study improves our knowledge of Comoclathris as no species has been previously described from China. This suggests such taxa may be rare and it is likely that new taxa will be discovered from hosts and environments that have not yet been extensively investigated.

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Research Article Fri, 12 Jan 2024 11:20:08 +0200
Seven new species of Alternaria (Pleosporales, Pleosporaceae) associated with Chinese fir, based on morphological and molecular evidence https://mycokeys.pensoft.net/article/115370/ MycoKeys 101: 1-44

DOI: 10.3897/mycokeys.101.115370

Authors: Jiao He, De-Wei Li, Wen-Li Cui, Lin Huang

Abstract: Chinese fir (Cunninghamia lanceolata) is a special fast-growing commercial tree species in China and has significant ecological and economic value. However, it experienced damage from leaf blight caused by pathogenic fungi of the genus Alternaria. To determine the diversity of Alternaria species associated with leaf blight of Chinese fir in China, infected leaves were collected from five major cultivation provinces (Fujian, Henan, Hunan, Jiangsu and Shandong provinces). A total of 48 fungal strains of Alternaria were obtained. Comparison of morphology and phylogenetic analyses, based on nine loci (ITS, SSU, LSU, GAPDH, RPB2, TEF1, Alt a1, endoPG and OPA10-2) of the representative isolates as well as the pairwise homoplasy index tests, revealed that the fungal strains belonged to seven undescribed taxa of Alternaria, which are described here and named as Alternaria cunninghamiicola sp. nov., A. dongshanqiaoensis sp. nov., A. hunanensis sp. nov., A. kunyuensis sp. nov., А. longqiaoensis sp. nov., A. shandongensis sp. nov. and A. xinyangensis sp. nov. In order to prove Koch’s postulates, pathogenicity tests on detached Chinese fir leaves revealed significant pathogenicity amongst these species, of which A. hunanensis is the most pathogenic to Chinese fir. This study represents the first report of A. cunninghamiicola, A. dongshanqiaoensis, A. hunanensis, A. kunyuensis, A. longqiaoensis, A. shandongensis and A. xinyangensis causing leaf blight on Chinese fir. Knowledge obtained in this study enhanced our understanding of Alternaria species causing leaf blight on Chinese fir and was crucial for the disease management and the further studies in the future.

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Research Article Fri, 5 Jan 2024 14:17:42 +0200
Morphological and molecular identification of two new Alternaria species (Ascomycota, Pleosporaceae) in section Radicina from China https://mycokeys.pensoft.net/article/64853/ MycoKeys 78: 187-198

DOI: 10.3897/mycokeys.78.64853

Authors: Lin He, Hong Cheng, Lin Zhao, Aye Aye Htun, Zhi He Yu, Jian Xin Deng, Qi Li Li

Abstract: The fungal genus Alternaria was distributed widely and found in different habitats such as plant or indoor environment. During an investigation into this genus in China, two new Alternaria species, Alternaria vulgarae and A. divaricatae were respectively isolated from diseased leaves of Foeniculum vulgare and Saposhnikovia divaricata, which both belonged to Umbelliferae. Phylogenetically, they were determined as new species belonging in the section Radicina of Alternaria based on the combined four gene fragments of ITS, TEF1, GAPDH and RPB2. Morphologically, the two species were illustrated and compared with other relevant Alternaria species in section Radicina.

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Research Article Fri, 9 Apr 2021 10:05:35 +0300