篮状菌属二个中国新记录种

Two species of Talaromyces new to China

摘要:

【背景】调查我国滩涂土壤可培养真菌物种多样性，丰富我国真菌物种资源。【目的】报道我国篮状菌属2个产子囊孢子的新记录种。【方法】采用形态学和基于β-微管蛋白基因部分序列和rDNA ITS1-5.8S-ITS2序列系统学的多相分类学方法。【结果】分离鉴定出3种有性型篮状菌，即阿根廷篮状菌Talaromyces argentinensis （ZZ2-7-1h=CGMCC 3.16171）、巴塞篮状菌Talaromyces barcinensis （ZZ2-1-1=CGMCC 3.16172）和乌克兰篮状菌Talaromyces ucrainicus（JS11-5=CGMCC 3.16173），其中前2种为我国新记录种。阿根廷篮状菌在25℃生长适度，在37℃生长局限，形成絮状兼绳状菌落，其菌丝体白色夹杂浅粉色，产生稀少的橙黄色裸囊壳和壁具细密小刺的椭球形子囊孢子。巴塞篮状菌在25℃生长适度，在37℃不生长，形成绒状菌落，其菌丝体为白色兼黄色，裸囊壳稀少，较小，呈皮黄色，子囊孢子椭球形，壁具稀疏小刺。【结论】参考我国迄今已报道的篮状菌物种，确定阿根廷篮状菌和巴塞篮状菌为我国篮状菌属的新记录种。

Abstract:

[Background] A survey of the species diversity of culturable fungi in tidal flats of China was carried out, aiming at enriching the fungal species resource in China. [Objective] To report two Talaromyces species producing ascospores new to China.[Methods] A polyphasic taxonomic method, which integrated morphological identification and the phylogeny based on sequences of β-tubulin gene (BenA) and rDNA ITS1-5.8S-ITS2, was employed. [Results] Three teleomorphic Talaromyces species were isolated and identified, namely, T. argentinensis (ZZ2-7-1h=CGMCC 3.16171), T. barcinensis (ZZ2-1-1=CGMCC 3.16172) and T. ucrainicus (JS11-5=CGMCC 3.16173), among which, the former two are new to China. T. argentinensis grows well at 25℃ and is restricted at 37℃, presenting floccose and funiculose colonies with white mycelia mingled with a light pink tint and producing sparse orange-yellow gymnothecia with echinulate ellipsoidal ascospores. T. barcinensis grows well at 25℃ but does not grow at 37℃, presenting velutinous colonies with white and yellow mycelia and bearing sparse, small gymnothecia in buff-yellow color with ellipsoidal, sparsely echinulate ascospores. [Conclusion] In review of the Talaromyces species reported from China hitherto, we confirmed that T. argentinensis and T. barcinensis are two new records of China.