干旱区生态环境知识资源中心(Arid): Rhizosheath-root system changes exopolysaccharide content but stabilizes bacterial community across contrasting seasons in a desert environment

Arid

DOI	10.1186/s40793-022-00407-3
	Rhizosheath-root system changes exopolysaccharide content but stabilizes bacterial community across contrasting seasons in a desert environment
	Marasco, Ramona; Fusi, Marco; Mosqueira, Maria; Booth, Jenny Marie; Rossi, Federico; Cardinale, Massimiliano; Michoud, Gregoire; Rolli, Eleonora; Mugnai, Gianmarco; Vergani, Lorenzo; Borin, Sara; De Philippis, Roberto; Cherif, Ameur; Daffonchio, Daniele
通讯作者	Marasco, R ; Daffonchio, D
来源期刊	ENVIRONMENTAL MICROBIOME
EISSN	2524-6372
出版年	2022
卷号	17 期号:1
英文摘要	Background In hot deserts daily/seasonal fluctuations pose great challenges to the resident organisms. However, these extreme ecosystems host unique microenvironments, such as the rhizosheath-root system of desert speargrasses in which biological activities and interactions are facilitated by milder conditions and reduced fluctuations. Here, we examined the bacterial microbiota associated with this structure and its surrounding sand in the desert speargrass Stipagrostis pungens under the contrasting environmental conditions of summer and winter in the Sahara Desert. Results The belowground rhizosheath-root system has higher nutrient and humidity contents, and cooler temperatures than the surrounding sand. The plant responds to the harsh environmental conditions of the summer by increasing the abundance and diversity of extracellular polymeric substances (EPS) compared to the winter. On the contrary, the bacterial community associated with the rhizosheath-root system and its interactome remain stable and, unlike the bulk sand, are unaffected by the seasonal environmental variations. The rhizosheath-root system bacterial communities are consistently dominated by Actinobacteria and Alphaproteobacteria and form distinct bacteria communities from those of bulk sand in the two seasons. The microbiome-stabilization mediated by the plant host acts to consistently retain beneficial bacteria with multiple plant growth promoting functions, including those capable to produce EPS, which increase the sand water holding capacity ameliorating the rhizosheath micro-environment. Conclusions Our results reveal the capability of plants in desert ecosystems to stabilize their below ground microbial community under seasonal contrasting environmental conditions, minimizing the heterogeneity of the surrounding bulk sand and contributing to the overall holobiont resilience under poly-extreme conditions.
英文关键词	Rhizosheath Plant-microbiome Desert Extracellular polymeric substances (EPS) Plant legacy Environmental fluctuation PGP microorganisms Desertification Environmentally-independent microbiome
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000777166800001
WOS关键词	BIOLOGICAL SOIL CRUSTS ; WATER-STRESS ; PLANT ; RESISTANCE ; DROUGHT ; MICROBIOME ; EXUDATION ; RESPONSES ; DYNAMICS ; TRAITS
WOS类目	Genetics & Heredity ; Microbiology
WOS研究方向	Genetics & Heredity ; Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392464
推荐引用方式 GB/T 7714	Marasco, Ramona,Fusi, Marco,Mosqueira, Maria,et al. Rhizosheath-root system changes exopolysaccharide content but stabilizes bacterial community across contrasting seasons in a desert environment[J],2022,17(1).
APA	Marasco, Ramona.,Fusi, Marco.,Mosqueira, Maria.,Booth, Jenny Marie.,Rossi, Federico.,...&Daffonchio, Daniele.(2022).Rhizosheath-root system changes exopolysaccharide content but stabilizes bacterial community across contrasting seasons in a desert environment.ENVIRONMENTAL MICROBIOME,17(1).
MLA	Marasco, Ramona,et al."Rhizosheath-root system changes exopolysaccharide content but stabilizes bacterial community across contrasting seasons in a desert environment".ENVIRONMENTAL MICROBIOME 17.1(2022).