Mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutions
Arbuscular mycorrhizal fungi (AMF) are common in cadmium (Cd)-contaminated soil. However, the effects of AMF on Cd migration in contaminated soil are still poorly understood. A pot experiment involving a control without AMF inoculation (CK), inoculation with AMF (AMF), and bacterial filtrate of the...
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Elsevier
2025-01-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651324015811 |
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| author | Wei Li Jiong Wu Jie Yan Xinran Liang Xiaoyi Li Yongmei He Bo Li Fangdong Zhan |
| author_facet | Wei Li Jiong Wu Jie Yan Xinran Liang Xiaoyi Li Yongmei He Bo Li Fangdong Zhan |
| author_sort | Wei Li |
| collection | DOAJ |
| description | Arbuscular mycorrhizal fungi (AMF) are common in cadmium (Cd)-contaminated soil. However, the effects of AMF on Cd migration in contaminated soil are still poorly understood. A pot experiment involving a control without AMF inoculation (CK), inoculation with AMF (AMF), and bacterial filtrate of the AMF inoculant (LY) was conducted in the present study. AMF caused an increase in total glomalin-related soil protein (T-GRSP) of 12.2 % and in the exudation of low-molecular-weight organic acids (LMWOAs), such as citric acid, malic acid, oxalic acid, and free amino acids, by maize roots of 30.4 %–200.0 % but caused a decrease in the Cd contents of the maize shoots and roots by 53.2 % and 47.2 %, respectively compared those of the CK. Moreover, AMF decreased the Cd concentration in the leachate by 36.0 %–76.3 % by reducing the proportion of Cd2 + and inorganic Cd complexes in the soil solution and leachate by 26.2 %–85.7 %, and increasing the proportion of organic Cd complexes. Structural equation analysis revealed that the GRSP and LMWOAs were the primary factors driving the potential of AMF to reduce Cd leaching loss from polluted soil. The adsorption of Cd ions by quartz sand increased with the application of GRSP and LMWOAs, which resulted in a 27.6 %–69.5 % reduction in Cd leaching loss in the sand column. In the soil with AMF, the proportion of organic-bound Cd increased and the proportion of inorganic-bound Cd decreased by promoting the secretion of LMWOAs via mycelium, thus reducing Cd leaching loss. |
| format | Article |
| id | doaj-art-f15bfb9d91df4ea8b7005847076b1d17 |
| institution | Kabale University |
| issn | 0147-6513 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj-art-f15bfb9d91df4ea8b7005847076b1d172025-01-23T05:25:48ZengElsevierEcotoxicology and Environmental Safety0147-65132025-01-01289117505Mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutionsWei Li0Jiong Wu1Jie Yan2Xinran Liang3Xiaoyi Li4Yongmei He5Bo Li6Fangdong Zhan7College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, ChinaCollege of Resources and Environment, Yunnan Agricultural University, Kunming 650201, ChinaCollege of Resources and Environment, Yunnan Agricultural University, Kunming 650201, ChinaCollege of Resources and Environment, Yunnan Agricultural University, Kunming 650201, ChinaCollege of Resources and Environment, Yunnan Agricultural University, Kunming 650201, ChinaCollege of Resources and Environment, Yunnan Agricultural University, Kunming 650201, ChinaCorresponding authors.; College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, ChinaCorresponding authors.; College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, ChinaArbuscular mycorrhizal fungi (AMF) are common in cadmium (Cd)-contaminated soil. However, the effects of AMF on Cd migration in contaminated soil are still poorly understood. A pot experiment involving a control without AMF inoculation (CK), inoculation with AMF (AMF), and bacterial filtrate of the AMF inoculant (LY) was conducted in the present study. AMF caused an increase in total glomalin-related soil protein (T-GRSP) of 12.2 % and in the exudation of low-molecular-weight organic acids (LMWOAs), such as citric acid, malic acid, oxalic acid, and free amino acids, by maize roots of 30.4 %–200.0 % but caused a decrease in the Cd contents of the maize shoots and roots by 53.2 % and 47.2 %, respectively compared those of the CK. Moreover, AMF decreased the Cd concentration in the leachate by 36.0 %–76.3 % by reducing the proportion of Cd2 + and inorganic Cd complexes in the soil solution and leachate by 26.2 %–85.7 %, and increasing the proportion of organic Cd complexes. Structural equation analysis revealed that the GRSP and LMWOAs were the primary factors driving the potential of AMF to reduce Cd leaching loss from polluted soil. The adsorption of Cd ions by quartz sand increased with the application of GRSP and LMWOAs, which resulted in a 27.6 %–69.5 % reduction in Cd leaching loss in the sand column. In the soil with AMF, the proportion of organic-bound Cd increased and the proportion of inorganic-bound Cd decreased by promoting the secretion of LMWOAs via mycelium, thus reducing Cd leaching loss.http://www.sciencedirect.com/science/article/pii/S0147651324015811Arbuscular mycorrhizal fungiGlomalin-related soil proteinLow-molecular-weight organic acidsSoil solutionCadmium formLeaching loss |
| spellingShingle | Wei Li Jiong Wu Jie Yan Xinran Liang Xiaoyi Li Yongmei He Bo Li Fangdong Zhan Mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutions Ecotoxicology and Environmental Safety Arbuscular mycorrhizal fungi Glomalin-related soil protein Low-molecular-weight organic acids Soil solution Cadmium form Leaching loss |
| title | Mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutions |
| title_full | Mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutions |
| title_fullStr | Mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutions |
| title_full_unstemmed | Mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutions |
| title_short | Mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutions |
| title_sort | mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutions |
| topic | Arbuscular mycorrhizal fungi Glomalin-related soil protein Low-molecular-weight organic acids Soil solution Cadmium form Leaching loss |
| url | http://www.sciencedirect.com/science/article/pii/S0147651324015811 |
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