Co-occurrence network analyses of rhizosphere soil microbial PLFAs and metabolites over continuous cropping seasons in tobacco

Autor:	Yuting Zhang, Bing Wang, Qingyou Xia, Yang Xingyong, Xin Wang, Xinhua He, Wenhui Yan, Hong Shen
Rok vydání:	2020
Předmět:	0106 biological sciences Rhizosphere biology Nicotiana tabacum Metabolite Soil Science Plant physiology 04 agricultural and veterinary sciences Plant Science biology.organism_classification 01 natural sciences Oleic acid chemistry.chemical_compound chemistry Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Food science Secondary metabolism Allelopathy 010606 plant biology & botany
Zdroj:	Plant and Soil. 452:119-135
ISSN:	1573-5036 0032-079X
DOI:	10.1007/s11104-020-04560-x
Popis:	To explore the mechanisms of continuous cropping obstacles of tobacco using co-occurrence network analyses to identify interactions between rhizosphere soil microbiota and metabolites. Using pot experiments, tobacco biomass, soil chemical properties were routinely determined over three continuous growth seasons. Rhizosphere microbiota and metabolites were respectively determined using phospholipid fatty acids (PLFAs) and gas chromatography-mass spectrometry, and then analysed using co-occurrence network analyses to explore growth obstacle mechanisms of tobacco. Tobacco biomass was significantly lower in the 2nd- and 3rd-season soils when compared with soils from the 1st-season – indicating growth obstacles. Three PLFA biomarkers (a16:0, 17:1ω8c, and 20:0) and five (i14:0, i15:1G, 17:0, 11Me18:1ω7c, and 16:1ω5c) were distinct to the 2nd- and 3rd-season soils, respectively. In the 2nd-season, 33 metabolites (phenol, cyclopropanebutanoic acid, 16-octadecenoic acid, n-hexadecanoic acid, and [z]-13-docosenamide, etc.) were up-regulated, and 10 metabolites (d-(−)-ribofuranose, d-(+)-cellobiose, and myo-inositol, etc.) down-regulated. Co-occurrence network analyses indicated that 16-octadecenoic acid, n-hexadecanoic acid, oleic acid and [z]-13-docosenamide might act as “hubs” to alter the secondary metabolism, d-(−)-ribofuranose and d-(+)-cellobiose as key metabolites to induce the changes in microbial compositions, while myo-inositol as a “trigger” metabolite in negative feedback signaling between plants and microbes. We found that a combination of positive feedback involving allelochemicals (i.e. phenolic acids) and negative feedback involving metabolites (i.e. myo-inositol, D-(−)-ribofuranose and D-(+)-cellobiose) could result in changes to soil microbial composition associated with plant growth obstacles.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::679d4e4f8d5288bd7dc7debc3adff64a https://doi.org/10.1007/s11104-020-04560-x Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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