桔黄赛多孢，一种潜在的致病有丝分裂产孢真菌

Scedosporium aurantiacum, a potential pathogenic mitosporic fungus

摘要:

【目的】调查发现我国土壤中稀有且重要的真菌资源。【方法】采用经典形态学及分子系统学方法对获得的菌株进行鉴定。【结果】从一养殖场含有猪粪的土样中分离获得一赛多孢EM12901菌株。其主要鉴别特征是：在查氏培养基上，绒状，灰白色至淡棕色。分生孢子梗单生或分枝；单生的分生孢子梗常退化为产孢细胞。产孢细胞顶生或侧生，透明至半透明，薄壁，柱状或轻微膨大的烧瓶状，(3.5-45.0) μm×(1.5-3.0) μm；分生孢子顶生或侧生，单生，透明至半透明，光滑，椭圆形、倒卵圆形或近柱状，(4.3-14.0) μm×(2.5-5.5) μm。【结论】基于形态学及分子系统学方法相结合鉴定，赛多孢EM12901菌株为我国一新记录种，桔黄赛多孢Scedosporium aurantiacum Gilgado, Cano, Gené & Guarro。

Abstract:

[Objective] The objectives were to investigate and discover some rare and important fungi from the soil in China. [Methods] The classical morphological characters and molecular systematics were used for identification of strains obtained. [Results] A strain of the genus Scedosporium was isolated from the soil of pig manure. The main characters were as follows: on Czapek agar, floccose, gray white to light brown. Conidiophore was single or branched; Single conidiophores was usually reduced to the conidiogenous cells, which is terminal or lateral, hyaline to subhyaline, smooth, cylindrical or lightly inflated flask-shaped, (3.5-45.0) μm×(1.5-3.0) μm; Conidia single, terminal or lateral, smooth, ellipsoidal, obovoid or sub-cylindral, (4.3-14.0) μm×(2.5-5.5) μm. [Conclusion] Based on the morphological characters and molecular systematic, the strain was proposed as S. aurantiacum Gilgado, Cano, Gené & Guarro, which is a new record species in China.