| Polyaspartic acid enhances the Cd phytoextraction efficiency of Bidens pilosa by remolding the rhizospheric environment and reprogramming plant metabolism | |
Li, Xiong1,2; Tian, Liyan3; Li, Boqun4; Chen, Huafang1; Zhao, Gaojuan1; Qin, Xiangshi2; Liu, Yuanyuan2; Yang, Yongping2,5,6 ; Xu, Jianchu1,6
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| 2022 | |
| Source Publication | CHEMOSPHERE
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| ISSN | 0045-6535 |
| Volume | 307Issue:xPages:- |
| Abstract | The green soil chelator polyaspartic acid (PASP) can enhance heavy metal phytoextraction efficiency, but the potential mechanisms are not clearly understood from the whole soil-plant system. In this study, we explored the effects and potential mechanisms of PASP addition in soils on plant growth and cadmium (Cd) uptake in the Cd hyperaccumulator Bidens pilosa by analysing variations in chemical elements, rhizospheric microbial community, and plant metabolomics. The results showed that PASP significantly promoted the biomass yield and Cd con-centration in B. pilosa, leading to an increase in the total accumulated Cd by 46.4% and 76.4% in shoots and 124.7% and 197.3% in roots under 3 and 6 mg kg-1 PASP addition, respectively. The improved soil-available nutrients and enriched plant growth-promoting rhizobacteria (e.g., Sphingopyxis, Sphingomonas, Cupriavidus, Achromobacter, Nocardioides, and Rhizobium) were probably responsible for the enhanced plant growth after PASP addition. The increase in Cd uptake by plants could be due to the improved rhizosphere-available Cd, which was directly activated by PASP and affected by the induced rhizobacteria involved in immobilizing/ mobilizing Cd (e.g., Sphingomonas, Cupriavidus, Achromobacter, and Rhizobium). Notably, PASP and/or these potassium (K)-solubilizing rhizobacteria (i.e., Sphingomonas, Cupriavidus, and Rhizobium) highly activated rhizosphere-available K to enhance plant growth and Cd uptake in B. pilosa. Plant physiological and metabolomic results indicated that multiple processes involving antioxidant enzymes, amino acids, organic acids, and lipids contributed to Cd detoxification in B. pilosa. This study provides novel insights into understanding how soil chelators drive heavy metal transfer in soil-plant systems. |
| Keyword | Heavy metal Phytoremediation Soil chelator Plant metabolomics Rhizobacteria |
| Subject Area | Environmental Sciences & Ecology |
| DOI | 10.1016/j.chemosphere.2022.136068 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000846598100004 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/13098 |
| Collection | 2012年后新成立研究组 |
| Affiliation | 1.Chinese Acad Sci, Kunming Inst Bot, Ctr Mt Futures, Kunming 650201, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Dept Econ Plants & Biotechnol, Yunnan Key Lab Wild Plant Resources, Kunming 650201, Peoples R China 3.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Peoples R China 4.Yunnan Normal Univ, Sch Energy & Environm Sci, Kunming 650500, Peoples R China 5.Chinese Acad Sci, Kunming Inst Bot, Sci & Technol Informat Ctr, Kunming 650201, Peoples R China 6.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Xishuangbanna 666303, Peoples R China 7.132 Lanhei Rd, Kunming 650201, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Xiong,Tian, Liyan,Li, Boqun,et al. Polyaspartic acid enhances the Cd phytoextraction efficiency of Bidens pilosa by remolding the rhizospheric environment and reprogramming plant metabolism[J]. CHEMOSPHERE,2022,307(x):-. |
| APA | Li, Xiong.,Tian, Liyan.,Li, Boqun.,Chen, Huafang.,Zhao, Gaojuan.,...&Xu, Jianchu.(2022).Polyaspartic acid enhances the Cd phytoextraction efficiency of Bidens pilosa by remolding the rhizospheric environment and reprogramming plant metabolism.CHEMOSPHERE,307(x),-. |
| MLA | Li, Xiong,et al."Polyaspartic acid enhances the Cd phytoextraction efficiency of Bidens pilosa by remolding the rhizospheric environment and reprogramming plant metabolism".CHEMOSPHERE 307.x(2022):-. |
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