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New endophytic Toxicocladosporium species from cacti in Brazil, and description of Neocladosporium gen. nov.
IMA Fungus ( IF 5.2 ) Pub Date : 2017-08-22 , DOI: 10.5598/imafungus.2017.08.01.06
Jadson D P Bezerra 1, 2, 3 , Marcelo Sandoval-Denis 3, 4, 5 , Laura M Paiva 1 , Gladstone A Silva 1, 2 , Johannes Z Groenewald 4 , Cristina M Souza-Motta 1, 2 , Pedro W Crous 4, 5, 6
Affiliation  

Brazil harbours a unique ecosystem, the Caatinga, which belongs to the tropical dry forest biome. This region has an important diversity of organisms, and recently several new fungal species have been described from different hosts and substrates within it. During a survey of fungal endophyte diversity from cacti in this forest, we isolated cladosporium-like fungi that were subjected to morphological and multigene phylogenetic analyses including actA, ITS, LSU, rpb2 and tub2 gene sequences. Based on these analyses we identified two new species belonging to the genus Toxicocladosporium, described here as T. cacti and T. immaculatum spp. nov., isolated from Pilosocereus gounellei subsp. gounellei and Melocactus zehntneri, respectively. To improve the species recognition and assess species diversity in Toxicocladosporium we studied all ex-type strains of the genus, for which actA, rpb2 and tub2 barcodes were also generated. After phylogenetic reconstruction using five loci, we differentiated 13 species in the genus. Toxicocladosporium velox and T. chlamydosporum are synonymized based on their phylogenetic position and limited number of unique nucleotide differences. Six strains previously assigned to T. leucadendri, including the ex-type strain (CBS 131317) of that species, were found to belong to an undescribed genus here named as Neocladosporium gen. nov., with N. leucadendri comb. nov. as type species. Furthermore, this study proposes the actA, ITS, rpb2 and tub2 as main phylogenetic loci to recognise Toxicocladosporium species.

中文翻译:

来自巴西仙人掌的新内生Toxicocladosporium种类,以及Neocladosporium gen的描述。十一月

巴西拥有独特的生态系统Caatinga,属于热带干旱森林生物群落。该区域具有重要的生物多样性,最近已从该区域内不同的宿主和底物描述了几种新的真菌物种。在对该森林中仙人掌的真菌内生菌多样性进行调查的过程中,我们分离了枝状孢子状真菌,并对其进行了形态和多基因系统发育分析,包括actA,ITS,LSU,rpb2和tub2基因序列。根据这些分析,我们确定了两个属于弓形虫属的新物种,在这里被称为仙人掌和不动杆菌。十一月,与Pilosocereus gounellei subsp分离。gounellei和Melocactus zehntneri。为了提高对Toxicocladosporium的物种识别和评估物种多样性,我们研究了该属的所有ex型菌株,并为其生成了actA,rpb2和tub2条形码。使用5个基因座进行系统发育重建后,我们在该属中区分了13种。根据其系统发生位置和有限的独特核苷酸差异数目,将Toxicocladosporium v​​elox和T. chlamydosporum成为同义词。已发现先前分配给白斑三叶草的六种菌株,包括该物种的前型菌株(CBS 131317),属于此处未描述的新孢子虫属。十一月,用N. leucadendri梳子。十一月 作为类型物种。此外,这项研究提出actA,ITS,rpb2和tub2作为识别Toxicocladosporium物种的主要系统发生基因座。还生成了rpb2和tub2条形码。在使用5个基因座进行系统发育重建后,我们区分了该属中的13种。由于其系统发生位置和有限数量的独特核苷酸差异,Toxicocladosporium v​​elox和T. chlamydosporum是同义词。已发现先前分配给白斑三叶草的六种菌株,包括该物种的ex型菌株(CBS 131317),属于此处未描述的属,称为新孢子虫属。十一月,用N. leucadendri梳子。十一月 作为类型物种。此外,这项研究提出actA,ITS,rpb2和tub2作为识别Toxicocladosporium物种的主要系统发生基因座。还生成了rpb2和tub2条形码。使用5个基因座进行系统发育重建后,我们在该属中区分了13种。由于其系统发生位置和有限数量的独特核苷酸差异,Toxicocladosporium v​​elox和T. chlamydosporum是同义词。已发现先前分配给白斑三叶草的六种菌株,包括该物种的ex型菌株(CBS 131317),属于此处未描述的属,称为新孢子虫属。十一月,用N. leucadendri梳子。十一月 作为类型物种。此外,这项研究提出actA,ITS,rpb2和tub2作为识别Toxicocladosporium物种的主要系统发生基因座。基于衣原体的系统发生位置和有限的独特核苷酸差异数目,它们是同义词。已发现先前分配给白斑三叶草的六种菌株,包括该物种的ex型菌株(CBS 131317),属于此处未描述的属,称为新孢子虫属。十一月,用N. leucadendri梳子。十一月 作为类型物种。此外,这项研究提出actA,ITS,rpb2和tub2作为识别Toxicocladosporium物种的主要系统发生基因座。基于衣原体的系统发生位置和有限的独特核苷酸差异数目,它们是同义词。已发现先前分配给白斑三叶草的六种菌株,包括该物种的ex型菌株(CBS 131317),属于此处未描述的属,称为新孢子虫属。十一月,用N. leucadendri梳子。十一月 作为类型物种。此外,这项研究提出actA,ITS,rpb2和tub2作为识别Toxicocladosporium物种的主要系统发生基因座。
更新日期:2019-11-01
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