Ngubane Nombuso P, Dreyer Leanne L, Oberlander Kenneth C, Roets Francois
Department of Botany and Zoology, Stellenbosch University, Private Bag X1, Stellenbosch, 7600, South Africa.
DST/NRF Centre of Excellence in Tree Health Biotechnology (CTHB), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Hatfield, Pretoria, 0028, South Africa.
Antonie Van Leeuwenhoek. 2018 Jun;111(6):965-979. doi: 10.1007/s10482-017-0995-3. Epub 2017 Dec 6.
The inflorescences and infructescences of African Protea trees provide habitat for a large diversity of Sporothrix species. Here we describe two additional members, Sporothrix nsini sp. nov. and Sporothrix smangaliso sp. nov., that are associated with the infructescences of various Protea species from grasslands and savannas in the KwaZulu-Natal, North-West, Gauteng and Mpumalanga provinces of South Africa. Their description raises the number of described Protea-associated Sporothrix species to twelve. S. smangaliso sp. nov. is distantly related to other Protea-associated species and, in phylogenies using multiple markers (ITS, beta-tubulin and calmodulin), groups with taxa such as Sporothrix bragantina from Brazil and Sporothrix curviconia from the Ivory Coast. S. nsini sp. nov. resolved as sister to a clade containing four other Protea-associated species within the Sporothrix stenoceras complex. S. nsini sp. nov. was collected from within the same infructescences of Protea caffra that also contained the closely related S. africana and S. protearum. This highlights the need to study and understand the factors that influence host selection and speciation of Sporothrix in this atypical niche.
非洲山龙眼树的花序和果序为多种孢子丝菌属物种提供了栖息地。在此，我们描述另外两个成员，新种恩氏孢子丝菌（Sporothrix nsini sp. nov.）和新种斯芒加利斯孢子丝菌（Sporothrix smangaliso sp. nov.），它们与南非夸祖鲁 - 纳塔尔省、西北省、豪登省和姆普马兰加省草原和稀树草原上各种山龙眼属物种的果序有关。它们的描述使已描述的与山龙眼属相关的孢子丝菌属物种数量增加到十二个。新种斯芒加利斯孢子丝菌与其他与山龙眼属相关的物种关系较远，在使用多个标记（ITS、β - 微管蛋白和钙调蛋白）构建的系统发育树中，与来自巴西的布拉甘蒂纳孢子丝菌（Sporothrix bragantina）和来自象牙海岸的弯形孢子丝菌（Sporothrix curviconia）等分类群归为一组。新种恩氏孢子丝菌在孢子丝菌狭窄角变种复合体中，被解析为包含其他四个与山龙眼属相关物种的一个分支的姐妹种。新种恩氏孢子丝菌是从与咖啡山龙眼相同的果序中采集到的，该果序中还包含密切相关的非洲孢子丝菌（S. africana）和山龙眼孢子丝菌（S. protearum）。这突出了研究和理解影响这种非典型生态位中孢子丝菌宿主选择和物种形成因素的必要性。
