Uranium enrichment performence and uranium stress mechanism of Deinococcus radiodurans

Deinococcus radiodurans (DR) was used as a biological adsorbent for uranium adsorption of low-concentration uranium wastewater.The enrichment performance of the DR was investigated at several conditions,and characterized by SEM and EDS, genes with relatively different expression of DR enriched uranium were screened through RNA-seq. Through GO analysis and KEGG pathway enrichment analysis, to find the main regulatory pathways.The results show that: The DR under the culture condition, pH = 5, temperature 30 ℃, initial concentration of 10 mg/L, dosage of DR 16 mL, adsorption time for 60 min, uranium(VI) adsorption rate was 91%, the solution pH = 6.1 after enrichment; several genes were up-regulated or down-regulated, which involved in a variety of signaling pathways, mainly involving oxidative phosphorylation, various glucose metabolism and amino acid synthesis metabolism. Cytochrome C oxidase was significantly up-regulated.