Potential of cadmium resistant Burkholderia contaminans strain ZCC in promoting growth of soy beans in the presence of cadmium
| Autor: | Christoper Rensing, Hong Liu, JiaXin Dai, Le-Xing You, YuanPing Li, Hend A. Alwathnani, ZiTing Lin, Jin-Lin Zhang, RuiRui Zhang, Renwei Feng, Chengkang Zhang, Martin Herzberg |
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| Rok vydání: | 2020 |
| Předmět: |
Burkholderia contaminans
Siderophore Burkholderia Health Toxicology and Mutagenesis ATPase chemistry.chemical_element Plant Development Extracellular polymeric substances Environmental pollution Mining Microbiology Soil Extracellular polymeric substance Plasmid Bioremediation Metals Heavy Soil Pollutants GE1-350 Soil Microbiology Soybean growth Cadmium Cadmium-resistance biology Indoleacetic Acids Public Health Environmental and Occupational Health General Medicine biology.organism_classification Pollution Adaptation Physiological Environmental sciences Biodegradation Environmental chemistry TD172-193.5 biology.protein Soybeans Bacteria |
| Zdroj: | Ecotoxicology and Environmental Safety, Vol 211, Iss, Pp 111914-(2021) |
| ISSN: | 1090-2414 |
| Popis: | Bioremediation of Cd contaminated environments can be assisted by plant-growth-promoting bacteria (PGPB) enabling plant growth in these sites. Here a gram-negative Burkholderia contaminans ZCC was isolated from mining soil at a copper-gold mine. When exposed to Cd(II), ZCC displayed high Cd resistance and the minimal inhibitory concentration was 7 mM in LB medium. Complete genome analysis uncovered B. contaminans ZCC contained 3 chromosomes and 2 plasmids. One of these plasmids was shown to contain a multitude of heavy metal resistance determinants including genes encoding a putative Cd-translocating PIB-type ATPase and an RND-type related to the Czc-system. These additional heavy metal resistance determinants are likely responsible for the increased resistance to Cd(II) and other heavy metals in comparison to other strains of B. contaminans. B. contaminans ZCC also displayed PGPB traits such as 1-aminocyclopropane-1-carboxylate deaminase activity, siderophore production, organic and inorganic phosphate solubilization and indole acetic acid production. Moreover, the properties and Cd(II) binding characteristics of extracellular polymeric substances was investigated. ZCC was able to induce extracellular polymeric substances production in response to Cd and was shown to be chemically coordinated to Cd(II). It could promote the growth of soybean in the presence of elevated concentrations of Cd(II). This work will help to better understand processes important in bioremediation of Cd-contaminated environment. |
| Databáze: | OpenAIRE |
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