Several newly discovered Mo-enriched plants with a focus on Macleaya cordata
| Autor: | Jike Li, Zhenguo Shen, Yahua Chen, Hongxiao Zhang, Xiao Wang, Chen Chen, Yan Xia, Jie Wang |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
China Health Toxicology and Mutagenesis chemistry.chemical_element 010501 environmental sciences Photosynthesis 01 natural sciences Plant Roots Mining Soil Papaveraceae Environmental Chemistry Soil Pollutants Hyperaccumulator Biomass 0105 earth and related environmental sciences Molybdenum Macleaya cordata Cadmium biology Chemistry Soil classification General Medicine biology.organism_classification Pollution Soil contamination Phytoremediation Horticulture Biodegradation Environmental Shoot 010606 plant biology & botany Environmental Monitoring |
| Zdroj: | Environmental science and pollution research international. 25(26) |
| ISSN: | 1614-7499 |
| Popis: | Phytoremediation as an alternative strategy has been a widespread attention. The screening of enriched plants and hyperaccumulators is the key of the strategy. So this study examined the status of heavy metal pollution in molybdenum (Mo) mine soils, metal accumulation in plants growing on mine, and their tolerance strategies. The analysis of 14 soils and 27 plant samples in mining area showed that Mo, zinc (Zn), and cadmium (Cd) concentrations exceeded soil safety standards and their levels varied in 27 plant samples. Mo was the heavy pollution with an average total content of 256.1 mg/kg in soils. As Mo-enriched plants, Mo concentrations of Macleaya cordata (Willd.) R. Br. and Morus australis Poir. were 704.4 and 772.4 mg/kg, respectively. M. cordata was selected as the research material, due to its high biomass. Molybdenum significantly decreased the biomass and photosynthesis of M. cordata at high concentration (> 200 μmol/L), but its biomass and photosynthesis reached the maximum after 50 μmol/L Mo treatment, respectively. Analysis of the subcellular distribution and chemical speciation showed that Mo was distributed a certain way in the extracts and that this suggested that it may be present in cell wall and soluble fraction of roots (51.9–63.9%; 26.1–44.7%) or shoots (30.0–44.4%; 47.3–56.0%) and complexed to organic acid, pectate, oxalate, and protein. This might be responsible for the adaptation of M. cordata to Mo stress. Therefore, M. cordata could serve as a potential plant to utilize for the phytoremediation of Mo-contaminated soil. |
| Databáze: | OpenAIRE |
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