水生生物学报2025，Vol.49Issue(7)：57-68,12.DOI:10.7541/2025.2024.0487
荒漠蓝藻中国新记录属——锥顶丝藻(Konicacronema,Gomontiellales)
KONICACRONEMA(GOMONTIELLALES):A NEWLY RECORDED DESERT CYANOBACTERIAL GENUS IN CHINA
摘要
Abstract
The genus Konicacronema,established by Machado de Lima et al.in 2020,was initially isolated from biological soil crusts in the semi-arid regions of Brazil(Caatinga community).In this study,we report the isolation and purification of three filamentous cyanobacterial strains:APE127,APE132,and APE190 from desert biocrust samples collected in Dalate County,Inner Mongolia,China.These strains exhibit morphological characteristics similar to Coleo-fasciculus-like and Microcoleus-like species.Based on 16S rRNA gene sequence analysis,strains APE127,APE132,and APE190 were identified as Konicacronema protuberans Jusko&Johansen 2024,demonstrating sequence similari-ties ranging from 98.7%to 99.3%with existing sequences of this species.Phylogenetic analyses further corroborate their placement within the Konicacronema genus,forming a robustly supported evolutionary clade.Moreover,the 16S—23S ITS secondary structure of these strains aligns with that of K.protuberans.Employing a polyphasic approach that integrates molecular,morphological,and ecological data,we confirm that strains APE127,APE132,and APE190 represent K.protuberans.These findings constitute the first records of this genus/species in China,expanding its known geographical distribution.关键词
荒漠蓝藻/锥顶丝藻属/生物土壤结皮/物种多样性/多相分类法Key words
Desert cyanobacteria/Konicacronema/Biocrusts/Species diversity/Polyphasic taxonomy分类
生物学引用本文复制引用
张阳,郭晓雨,胡春香,杨海剑,刘洋,李华..荒漠蓝藻中国新记录属——锥顶丝藻(Konicacronema,Gomontiellales)[J].水生生物学报,2025,49(7):57-68,12.基金项目
湖北省自然科学基金杰出青年基金(2022CFA105) （2022CFA105）
国家自然科学基金面上项目(41877419)资助[Supported by the Natural Science Foundation for Distinguished Young Scholars of Hubei Province(2022CFA105) （41877419）
the National Natural Science Foundation of China(41877419)] （41877419）
