Effects of Salt Stress on the Structure and Function of Oil-Contaminated Soil Bacteria

Hou, Xinran; Ji, Lei; Li, Tian; Qi, Zhichong; Sun, Xu Hua; Li, Qi; Zhang, Qiang

doi:10.1007/s11270-022-05797-1

Cited by 5 publications

(1 citation statement)

References 40 publications

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“…Bacillus belonging to the phylum Firmicutes is noteworthy in this study. Firmicutes is often considered as one of the most important phyla in the biodegradation of petroleum-contaminated soil and has a degrading effect on petroleum alkanes, some aromatic hydrocarbons, and other stubborn components ( Gao et al, 2022 ; Hou et al, 2022 ). Most of the strains of degreasing bacteria in the microbial agent used in our study belong to the genus Bacillus , and there was a corresponding increase in the relative abundance of Bacillus at the genus level in the treatments where the microbial agent was applied, especially in the treatments where it was applied in combination with plants, or with plants and biochar.…”

Section: Discussionmentioning

confidence: 99%

Biochar-bacteria-plant combined potential for remediation of oil-contaminated soil

Fang,

Zhang,

Zheng

et al. 2024

Front. Microbiol.

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Oil pollution is a common type of soil organic pollution that is harmful to the ecosystem. Bioremediation, particularly microbe-assisted phytoremediation of oil-contaminated soil, has become a research hotspot in recent years. In order to explore more appropriate bioremediation strategies for soil oil contamination and the mechanism of remediation, we compared the remediation effects of three plants when applied in combination with a microbial agent and biochar. The combined remediation approach of Tagetes erecta, microbial agent, and biochar exhibited the best plant growth and the highest total petroleum hydrocarbons degradation efficiency (76.60%). In addition, all of the remediation methods provided varying degrees of restoration of carbon and nitrogen contents of soils. High-throughput sequencing found that microbial community diversity and richness were enhanced in most restored soils. Some soil microorganisms associated with oil degradation and plant growth promotion such as Cavicella, C1_B045, Sphingomonas, MND1, Bacillus and Ramlibacter were identified in this study, among which Bacillus was the major component in the microbial agent. Bacillus was positively correlated with all soil remediation indicators tested and was substantially enriched in the rhizosphere of T. erecta. Functional gene prediction of the soil bacterial community based on the KEGG database revealed that pathways of carbohydrate metabolism and amino acid metabolism were up-regulated during remediation of oil-contaminated soils. This study provides a potential method for efficient remediation of oil-contaminated soils and thoroughly examines the biochar–bacteria–plant combined remediation mechanisms of oil-contaminated soil, as well as the combined effects from the perspective of soil bacterial communities.

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Section: Discussionmentioning

confidence: 99%