Microbial cell wall sorption and Fe-Mn binding in rhizosphere contribute to the obstruction of cadmium from soil to rice
文献类型：期刊论文
| 作者 | Li, Jie; Guo, Yi-Kai; Zhao, Qing-Xia; He, Ji-Zheng; Zhang, Qian; Cao, Hong-Ying; Liang, Chao-Qiong |
| 刊名 | FRONTIERS IN MICROBIOLOGY
 |
| 出版日期 | 2023-04-17 |
| 卷号 | 14页码:1162119 |
| 关键词 | cadmium bio-sorption tolerant species Cd accumulation rice |
| DOI | 10.3389/fmicb.2023.1162119 |
| 文献子类 | Article |
| 英文摘要 | Screening high-tolerant microorganisms to cadmium (Cd) and revealing their bio-obstruction mechanism could be significant for Cd regulation from farmland to the food chain. We examined the tolerance and bio-removal efficiency of Cd ions of two bacterial strains, Pseudomonas putida 23483 and Bacillus sp. GY16, and measured the accumulation of Cd ions in rice tissues and its different chemical forms in soil. The results showed that the two strains had high tolerance to Cd, but the removal efficiency was decreased successively with increasing Cd concentrations (0.05 to 5 mg kg(-1)). Cell-sorption accounted for the major proportion of Cd removal compared with excreta binding in both strains, which was conformed to the pseudo-second-order kinetics. At the subcellular level, Cd was mostly taken up by the cell mantle and cell wall, and only a small amount entered into the cytomembrane and cytoplasmic with time progressed (0 to 24 h) in each concentration. The cell mantle and cell wall sorption decreased with increasing Cd concentration, especially in the cytomembrane and cytoplasmic. The scanning electron microscope (SEM) and energy dispersive X-ray (EDS) analysis verified that Cd ions were attached to the cell surface, and the functional groups of C-H, C-N, C=O, N-H, and O-H in the cell surface may participate in cell-sorption process tested by the FTIR analysis. Furthermore, inoculation of the two strains significantly decreased Cd accumulation in rice straw and grain but increased in the root, increased Cd enrichment ratio in root from soil, decreased Cd translocation ratio from root to straw and grain, and increased the Cd concentrations of Fe-Mn binding form and residual form in rhizosphere soil. This study highlights that the two strains mainly removed Cd ions in solution through biosorption and passivated soil Cd as Fe-Mn combined form ascribe to its characteristics of manganese-oxidizing, eventually achieving bio-obstruction of Cd from soil to rice grain. |
| 学科主题 | Microbiology |
| WOS关键词 | HEAVY-METAL RESISTANCE ; PLANT-GROWTH ; BACTERIAL COMMUNITIES ; CONTAMINATED SOILS ; TOLERANT BACTERIA ; AQUEOUS-SOLUTIONS ; MANGANESE OXIDES ; CD ACCUMULATION ; EDIBLE TISSUES ; BIOSORPTION |
| 语种 | 英语 |
| 出版者 | FRONTIERS MEDIA SA |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/193468]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 作者单位 | 1.Guizhou Univ, Inst New Rural Dev, Guiyang, Peoples R China 2.Univ Melbourne, Fac Vet & Agr Sci, Parkville, Vic, Australia 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing Key Lab Environm Damage Assessment & Remed, Beijing, Peoples R China 4.Shaanxi Acad Forestry, Xian, Peoples R China 5.Chinese Acad Sci, Inst Microbiol, State Key Lab Mycol, Beijing, Peoples R China 6.Ecol Environm Planning & Environm Protect Technol, Xining, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jie,Guo, Yi-Kai,Zhao, Qing-Xia,et al. Microbial cell wall sorption and Fe-Mn binding in rhizosphere contribute to the obstruction of cadmium from soil to rice[J]. FRONTIERS IN MICROBIOLOGY,2023,14:1162119. |
| APA | Li, Jie.,Guo, Yi-Kai.,Zhao, Qing-Xia.,He, Ji-Zheng.,Zhang, Qian.,...&Liang, Chao-Qiong.(2023).Microbial cell wall sorption and Fe-Mn binding in rhizosphere contribute to the obstruction of cadmium from soil to rice.FRONTIERS IN MICROBIOLOGY,14,1162119. |
| MLA | Li, Jie,et al."Microbial cell wall sorption and Fe-Mn binding in rhizosphere contribute to the obstruction of cadmium from soil to rice".FRONTIERS IN MICROBIOLOGY 14(2023):1162119. |
入库方式： OAI收割
来源：地理科学与资源研究所
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