Diversity of Leptolvngbva-like cyanobacteria in biocrusts in desert area
Aims:Biological soil crusts are an important landscape in arid and semi-arid ecosystems.Leptolyngbya-like cyanobacteria are common groups of cyanobacteria found in biocrusts within arid ecosystem.However,their morphological characteristics are often subtle,making species-level differentiation based solely on morphological characteristics difficult.This study aims to enrich the understanding of the species diversity of biological crust cyanobacteria in arid and semi-arid regions by integrating morphological characteristics with molecular biology.Method:In this study,six strains of Leptolyngbya-like cyanobacteria,isolated from the Gurbantunggut Desert and the Mu Us Desert,were identified by morphological characteristics,16S rRNA molecular sequences,and ITS(internal transcribed spacer)secondary structure methods.Results:The results showed that all the experimental cyanobacterial strains belonged to 4 species and 4 genus of 3 families,2 orders,including Leptolyngbya boryana of Leptolyngbya and Myxacorys californica of Myxacorys in Leptolyngbyaceae,Trichocoleus desertorum of Trichocoleus in Trichocoleusaceae of Leptolynabgales,and Oculatella coburniia of Oculatella in Oculatellaceae of Oculatellales.Conclusion:We found Oculatellales as a new record order in China,along with Trichocoleusaceae and Oculatellaceae as new record families,Myxacorys,Trichocoleus,and Oculatella as new record genera.Additionally,T.desertorum,M.californica,and O.coburniia are newly recorded species in China.These findings enhance our understanding of cyanobacterial diversity in biocrusts in desert areas.
biocrustsLeptolyngbya-like cyanobacteriamorphological characteristic16S rRNAITS second structure
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