干旱区生态环境知识资源中心(Arid): Microenvironmental Conditions Drive the Differential Cyanobacterial Community Composition of Biocrusts from the Sahara Desert

Arid

DOI	10.3390/microorganisms9030487
	Microenvironmental Conditions Drive the Differential Cyanobacterial Community Composition of Biocrusts from the Sahara Desert
	Mehda, Smail; Munoz-Martin, M. Angeles; Oustani, Mabrouka; Hamdi-Aissa, Baelhadj; Perona, Elvira; Mateo, Pilar
通讯作者	Mateo, P (corresponding author), Univ Autonoma Madrid, Fac Ciencias, Dept Biol, Madrid 28049, Spain.
来源期刊	MICROORGANISMS
EISSN	2076-2607
出版年	2021
卷号	9 期号:3
英文摘要	The Sahara Desert is characterized by extreme environmental conditions, which are a unique challenge for life. Cyanobacteria are key players in the colonization of bare soils and form assemblages with other microorganisms in the top millimetres, establishing biological soil crusts (biocrusts) that cover most soil surfaces in deserts, which have important roles in the functioning of drylands. However, knowledge of biocrusts from these extreme environments is limited. Therefore, to study cyanobacterial community composition in biocrusts from the Sahara Desert, we utilized a combination of methodologies in which taxonomic assignation, for next-generation sequencing of soil samples, was based on phylogenetic analysis (16S rRNA gene) in parallel with morphological identification of cyanobacteria in natural samples and isolates from certain locations. Two close locations that differed in microenvironmental conditions were analysed. One was a dry salt lake (a chott), and the other was an extension of sandy, slightly saline soil. Differences in cyanobacterial composition between the sites were found, with a clear dominance of Microcoleus spp. in the less saline site, while the chott presented a high abundance of heterocystous cyanobacteria as well as the filamentous non-heterocystous Pseudophormidium sp. and the unicellular cf. Acaryochloris. The cyanobacteria found in our study area, such as Microcoleus steenstrupii, Microcoleus vaginatus, Scytonema hyalinum, Tolypothrix distorta, and Calothrix sp., are also widely distributed in other geographic locations around the world, where the conditions are less severe. Our results, therefore, indicated that some cyanobacteria can cope with polyextreme conditions, as confirmed by bioassays, and can be considered extremotolerant, being able to live in a wide range of conditions.
英文关键词	biocrust cyanobacteria Sahara Desert polyextreme conditions hyperarid deserts
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000633909700001
WOS类目	Microbiology
WOS研究方向	Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351144
作者单位	[Mehda, Smail; Munoz-Martin, M. Angeles; Perona, Elvira; Mateo, Pilar] Univ Autonoma Madrid, Fac Ciencias, Dept Biol, Madrid 28049, Spain; [Mehda, Smail; Hamdi-Aissa, Baelhadj] Univ Ouargla, Lab Biogeochem Desert Areas, Ouargla 30000, Algeria; [Mehda, Smail] Univ El Oued, Fac Life & Nat Sci, Dept Agron, El Oued 39000, Algeria; [Oustani, Mabrouka] Univ Ouargla, Lab Saharan Bioresources Preservat & Dev, Ouargla 30000, Algeria
推荐引用方式 GB/T 7714	Mehda, Smail,Munoz-Martin, M. Angeles,Oustani, Mabrouka,et al. Microenvironmental Conditions Drive the Differential Cyanobacterial Community Composition of Biocrusts from the Sahara Desert[J],2021,9(3).
APA	Mehda, Smail,Munoz-Martin, M. Angeles,Oustani, Mabrouka,Hamdi-Aissa, Baelhadj,Perona, Elvira,&Mateo, Pilar.(2021).Microenvironmental Conditions Drive the Differential Cyanobacterial Community Composition of Biocrusts from the Sahara Desert.MICROORGANISMS,9(3).
MLA	Mehda, Smail,et al."Microenvironmental Conditions Drive the Differential Cyanobacterial Community Composition of Biocrusts from the Sahara Desert".MICROORGANISMS 9.3(2021).