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Four New Pale-Spored Species of Xylaria (Xylariaceae, Xylariales) with a Key to Worldwide Species on Fallen Fruits and Seeds

文献类型： 外文期刊

作者： Ma, Haixia 1 ; Song, Zikun 1 ; Pan, Xiaoyan 1 ; Qu, Zhi 1 ; Yang, Zhanen 1 ; Li, Yu 4 ; Zhu, Anhong 6 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 571101, Hainan, Peoples R China

2.Hainan Inst Trop Agr Resources, Haikou 571101, Hainan, Peoples R China

3.Hainan Key Lab Trop Microbe Resources, Haikou 571101, Hainan, Peoples R China

4.Jilin Agr Univ, Coll Plant Protect, Changchun 130118, Peoples R China

5.Southwest Forestry Univ, Coll Biodivers Conservat, Kunming 650224, Yunnan, Peoples R China

6.Chinese Acad Trop Agr Sci, Haikou 571101, Hainan, Peoples R China

关键词： Ascomycota; Xylariaceae; fructicolous fungi; molecular phylogenetics; taxonomy of new species

期刊名称：BIOLOGY-BASEL （ 影响因子：5.168； ）

ISSN：

年卷期： 2022 年 11 卷 6 期

页码：

收录情况： SCI

摘要： Simple Summary Xylaria, a large, complex, and cosmopolitan genus of Ascomycota, are known as a source of bioactive secondary metabolites with antibacterial, antioxidative, anti-carcinogenic, and other properties. The species of this genus usually grow on decayed wood, fallen fruits or seeds, fallen leaves or petioles, and termite nests. The present paper describes species of Xylaria associated with fruits and seeds using morphological and multigene phylogenetic analyses based on specimens collected in Southwest China. There are few detailed reports on Xylaria taxonomy from China, especially on the species associated with fallen fruits and seeds. In this study, we describe four new species from the genus Xylaria with pale-colored ascospores on fallen fruits. They are described, illustrated, and compared with morphologically similar species, and their nucleotide sequences of ITS, RPB2, and beta-tubulin were obtained and analysed. Our study reports new species of Xylaria with pale-colored ascospores associated with fallen fruits and seeds in China for the first time. Xylaria, a large and cosmopolitan genus of Ascomycota, plays an important ecological role in forest ecology as wood-decomposers, and serve as a source of bioactive secondary metabolites. The present work concerns a survey of Xylaria from Southwest China. Four new species of Xylaria with pale-colored ascospores associated with fallen fruits and seeds are described and illustrated based on morphological and phylogenetic evidences. The phylogeny inferred from a combined dataset of ITS-RPB2-beta-tubulin sequences supports these four species as distinct species. The four new taxa, namely Xylaria rogersii, X. schimicola, X. theaceicola, and X. wallichii, are compared and contrasted against morphologically similar species. A dichotomous identification key to all the accepted species of Xylaria associated with fallen fruits and seeds is given.

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