形态学和多基因系统发育揭示了中国云南省的一个榧科新种

Diversity Pub Date : 2024-09-05 DOI:10.3390/d16090551
Shucheng He, Deping Wei, Chitrabhanu S. Bhunjun, Ruvishika S. Jayawardena, Vinodhini Thiyagaraja, Qi Zhao, Al-Otibi Fatimah, Kevin D. Hyde
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引用次数: 0

摘要

榧科(Torulaceae)属于多孔菌目(Dothideomycetes),主要由无菌纲(saprobes)组成。这些类群广泛分布于陆生和水生生境中。本研究在中国云南省采集了 3 份薹草枯叶标本和 2 份沉水木标本。通过形态学检查和内部转录间隔区ITS1-5.8S-ITS2(ITS)、核大亚基rDNA(28S)、核小亚基rDNA(18S)、翻译延伸因子1-α(tef1)基因和RNA聚合酶II第二大亚基(rpb2)的多焦点系统发育分析,发现了一个新种Rutola kunmingensis和一个新收集的Torula sundara。Rutola kunmingensis 的特征是黑色、粉状菌落,微湿、匍匐、网状的分生孢子器,带有不明显、单体的分生孢子座,以及多隔、猫眼状、瘤状、褐色的分生孢子。将榧科各属的分生孢子器和分生孢子映射到系统发生树上,讨论了该科的属划分,还讨论了榧科中 ITS、18S、28S、rpb2 和 tef1 序列的显著分化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Morphology and Multi-Gene Phylogeny Reveal a New Species of Family Torulaceae from Yunnan Province, China
The Family Torulaceae belongs to the Order Pleosporales (Class Dothideomycetes) and mainly comprises saprobes. The taxa are widely distributed in both terrestrial and aquatic habitats. In this study, we collected three dead leaf specimens of Carex baccans and two submerged wood specimens in Yunnan Province, China. A biphasic approach of morphological examination and multi-locus phylogenetic analyses conducted for internal transcribed spacer region ITS1-5.8S-ITS2 (ITS), nuclear large subunit rDNA (28S), nuclear small subunit rDNA (18S), translation elongation factor 1-α (tef1) gene, and RNA polymerase II second-largest subunit (rpb2) revealed one new species Rutola kunmingensis and a new collection of Torula sundara. Rutola kunmingensis is characterized by black, powdery colonies, micronematous, creeping, reticular conidiophores bearing inconspicuous, monoblastic conidiogenous loci, and multi-septate, catenulate, verruculose, brown conidia. The conidiophores and conidia of each genus in Torulaceae are mapped onto the phylogenetic tree and the generic demarcations of this family are discussed and the significant divergence of ITS, 18S, 28S, rpb2, and tef1 sequences in Torulaceae is also discussed.
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