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Lin L, Li J, Zveushe OK, Han Y, Zhang H, Qin Y, de Dios VR, Zhou L, Xi X, Zhang W, Zhao Y, Omer AM, Dong F. Newly isolated bacterium and arbuscular mycorrhizal fungus effectively reduce the root cadmium concentration and increase the root biomass of Ophiopogon japonicus. JOURNAL OF HAZARDOUS MATERIALS 2025; 488:137361. [PMID: 39874763 DOI: 10.1016/j.jhazmat.2025.137361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2024] [Revised: 01/14/2025] [Accepted: 01/22/2025] [Indexed: 01/30/2025]
Abstract
Soil cadmium (Cd) contamination is one of the major challenges in food production. This has led to above-maximum threshold accumulation of Cd in O. japonicus roots. This research identifies Pseudomonas tianjinensis S2 (PL), a newly isolated bacterium, and Corymbiglomus tortuosum (Ct), an arbuscular mycorrhizal fungus (AMF), as effective agents for reducing Cd concentration in the roots of O. japonicus. Compared to the control (CK) treatment, the root Cd levels decreased by 62.27 % and 46.13 %, respectively, significantly enhancing root biomass. We also noticed the involvement of -OH, -CH, and CC functional groups in Cd chelation in both treatments, and the formation of precipitates, including C2H2CdO4, C4H6CdO4, Cd(OH)2, and Cd3(PO4)2, in both PL and Ct treatments. Moreover, the proportion of residual Cd in soil increased by 21.21 % and 10.61 % for the PL and Ct treatments, respectively, compared to the CK. The findings suggest that P. tianjinensis S2 is more effective than C. tortuosum for high Cd-contaminated fields, while the fungal inoculant is suitable for lower contamination levels, offering valuable strategies for bioremediation. Therefore, we suggest further research to focus on elucidating the effect of a P. tianjinensis S2 and C. tortuosum combination on O. japonicus root growth and Cd accumulation.
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Affiliation(s)
- Lin Lin
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Jin Li
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Obey Kudakwashe Zveushe
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Ying Han
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China.
| | - Hengxing Zhang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Yu Qin
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Victor Resco de Dios
- Department of Crop and Forest Sciences, University of Lleida, Lleida, Spain; Joint Research Unit CTFC-AGROTECNIO, Universitat de Lleida, Lleida, Spain
| | - Lei Zhou
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Xiangyu Xi
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Wei Zhang
- Center of Analysis and Testing, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Yulian Zhao
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Amal Mohamed Omer
- Desert Research Center, Department of Soil Microbiology, Cairo, Egypt
| | - Faqin Dong
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China.
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Zveushe OK, Nkoh JN, de Dios VR, Manjoro TT, Suanon F, Zhang H, Chen W, Lin L, Zhou L, Zhang W, Sesu F, Li J, Han Y, Dong F. Enhancing hexavalent chromium stable reduction via sodium alginate encapsulation of newly isolated fungal and bacterial consortia. JOURNAL OF HAZARDOUS MATERIALS 2025; 486:136994. [PMID: 39740549 DOI: 10.1016/j.jhazmat.2024.136994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2024] [Revised: 12/18/2024] [Accepted: 12/23/2024] [Indexed: 01/02/2025]
Abstract
Chromium [Cr(VI)]-induced soil pollution is a serious environmental threat. Bioremediation utilizes specific microbes capable of transforming Cr(VI) into the less toxic Cr(III), however, microbial efficacy can be inhibited by elevated pollutant concentrations and competition from indigenous microbial communities. Thus, this study explored the potential of single and multi-domain microbial consortia encapsulated in alginate to overcome these shortcomings. The results revealed that (i) fungal treatments demonstrated an elevated tolerance and reduction ability for Cr(VI) compared to bacterial treatments; (ii) combined application of fungi and bacteria was more effective in degrading Cr(VI) in soil compared to the individual treatments; (iii) microbial encapsulation improved microbial response to Cr(VI) toxicity thereby increasing their lifespan and Cr(VI) degrading ability; (iv) microbial consortia significantly decreased soil pH, electrical conductivity, and redox potential while simultaneously increasing soil enzyme activities (urease, sucrase, phosphatase, catalase, and laccase); and (v) The improved tolerance in the inoculated treatment resulted in increased microbial diversity and a substantial variation in microbial community structures, with 10,753 bacterial and 2697 fungal amplicon sequence variants identified across the treatment groups. This study underscores the critical importance of microbial diversity in bioremediation, emphasizing that encapsulation with the right material could improve the effectiveness of environmental remediation strategies.
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Affiliation(s)
- Obey Kudakwashe Zveushe
- School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Jackson Nkoh Nkoh
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Science and Oceanography, Shenzhen University, Shenzhen 518060, China
| | - Víctor Resco de Dios
- Joint Research Unit CTFC-AGROTECNIO-CERCA Center, Lleida 25198, Spain; Department of Forest and Agricultural Sciences and Engineering, University of Lleida, Lleida 25198, Spain
| | - Tendai Terence Manjoro
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Fidèle Suanon
- School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Hengxing Zhang
- School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Wenfang Chen
- School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Lin Lin
- School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Lei Zhou
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China
| | - Wei Zhang
- Center of Analysis and Testing, Southwest University of Science and Technology, Mianyang 621010, China
| | - Frank Sesu
- School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Jin Li
- School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Ying Han
- School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang 621010, China.
| | - Faqin Dong
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China.
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Li R, Guo X, Qi Y, Wang Y, Wang J, Zhang P, Cheng S, He W, Zhao T, Li Y, Li L, Ji J, He A, Ai Z. Soil Amendments and Slow-Release Urea Improved Growth, Physiological Characteristics, and Yield of Salt-Tolerant Rice Under Salt Stress Conditions. PLANTS (BASEL, SWITZERLAND) 2025; 14:543. [PMID: 40006802 PMCID: PMC11859376 DOI: 10.3390/plants14040543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2024] [Revised: 01/29/2025] [Accepted: 02/07/2025] [Indexed: 02/27/2025]
Abstract
The present study aimed to investigate the effects of different soil amendments coupled with nitrogen fertilizer on the morpho-physiological characteristics and yield of salt-tolerant rice under saline conditions. The soil amendments, i.e., S1: zeolite amendment, S2: coconut coir amendment, S3: humic acid amendment, and S0: no amendment, and fertilizer treatments, i.e., N1: urea, N2: slow-release urea, and N0: no N fertilizer, were kept in main plots and sub-plots, respectively, in a split-plot design. The salt-tolerant variety 'Shuangliangyou 138' was exposed to 0.3% salt irrigation water. The results showed that during the entire growth period, compared to S0, the S1 and S3 treatments increased the SPAD values by an average of 6.3%and 5.5%, respectively, the leaf area index by an average of 24.5% and 19.8%, the canopy interception rate by an average of 11.5% and 4.1%, and the aboveground biomass by an average of 36.8% and 13.9%, respectively. Moreover, under S1 and S3 conditions, the tiller number per square meter, leaf water potential, leaf water content, and chlorophyll contents were also improved under the slow-release urea than urea. Moreover, slow-release urea promoted root vitality and nutrient absorption as well as enhanced the activity of antioxidant and nitrogen metabolism enzymes than urea under the S1 and S3 conditions. In sum, the rational application of soil amendments and slow-release urea could improve the rice productivity on saline-alkali land.
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Affiliation(s)
- Rongyi Li
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Xiayu Guo
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
- Hunan Hybrid Rice Research Center, Changsha 410125, China
| | - Yucheng Qi
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Yuyuan Wang
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Jianbo Wang
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Pengfei Zhang
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Shenghai Cheng
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Wenli He
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Tingcheng Zhao
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Yusheng Li
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Lin Li
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Junchao Ji
- College of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; (R.L.); (Y.Q.); (Y.W.); (J.W.); (P.Z.); (S.C.); (W.H.); (T.Z.); (Y.L.); (L.L.); (J.J.)
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
| | - Aibin He
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
- Hunan Hybrid Rice Research Center, Changsha 410125, China
| | - Zhiyong Ai
- National Innovation Center of Saline-Alkali Tolerant Rice in Sanya, Sanya 572000, China;
- Hunan Hybrid Rice Research Center, Changsha 410125, China
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Huo X, Wang C, Huang Y, Kong W, Wang X. Effect of S-Allyl-L-Cysteine on Nitric Oxide and Cadmium Processes in Rice ( Oryza sativa L. sp. Zhongzao35) Seedlings. TOXICS 2024; 12:805. [PMID: 39590985 PMCID: PMC11598062 DOI: 10.3390/toxics12110805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2024] [Revised: 11/03/2024] [Accepted: 11/05/2024] [Indexed: 11/28/2024]
Abstract
Nitric oxide (NO) is an important signaling molecule involved in regulating plant processes to cope with abiotic stress. S-allyl-L-cysteine (SAC) is known to induce NO synthesis in animals. However, it is unknown whether SAC can trigger NO biosynthesis, regulate Cd transport, or alleviate Cd stress in plants. After being sprayed with 0.2 mM SAC, rice seedlings had a NO content that was 1.8 times higher than that of the control (ctrl) group at the ninth hour, which then gradually decreased. The expressions of Cd uptake and transport genes in the roots (including OsNRAMP5, OsNRAMP1, and OsHMA2) were markedly downregulated by 27.2%, 24.8%, and 49.1%, respectively, 72 h after SAC spraying treatment. The Cd content in seedling roots' cell wall (CW) components significantly increased by 43.5% compared to that of the ctrl group. The Cd content in the shoots and roots decreased by 49.0% and 29.8%, respectively. Cd stress in the seedlings was also substantially alleviated. In conclusion, spraying rice seedlings with SAC triggered an increase in NO synthesis, regulated the expression of genes related to Cd transport, increased Cd fixation in the root CW components, and reduced Cd accumulation in the roots and shoots.
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Affiliation(s)
| | | | - Yongchun Huang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; (X.H.); (C.W.); (W.K.); (X.W.)
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Maqbool Z, Shahbaz Farooq M, Rafiq A, Uzair M, Yousuf M, Ramzan Khan M, Huo S. Unlocking the potential of biochar in the remediation of soils contaminated with heavy metals for sustainable agriculture. FUNCTIONAL PLANT BIOLOGY : FPB 2024; 51:FP23257. [PMID: 38310926 DOI: 10.1071/fp23257] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 12/20/2023] [Indexed: 02/06/2024]
Abstract
Agricultural soils contaminated with heavy metals (HMs) impose a threat to the environmental and to human health. Amendment with biochar could be an eco-friendly and cost-effective option to decrease HMs in contaminated soil. This paper reviews the application of biochar as a soil amendment to immobilise HMs in contaminated soil. We discuss the technologies of its preparation, their specific properties, and effect on the bioavailability of HMs. Biochar stabilises HMs in contaminated soil, enhance the overall quality of the contaminated soil, and significantly reduce HM uptake by plants, making it an option in soil remediation for HM contamination. Biochar enhances the physical (e.g. bulk density, soil structure, water holding capacity), chemical (e.g. cation exchange capacity, pH, nutrient availability, ion exchange, complexes), and biological properties (e.g. microbial abundance, enzymatic activities) of contaminated soil. Biochar also enhances soil fertility, improves plant growth, and reduces the plant availability of HMs. Various field studies have shown that biochar application reduces the bioavailability of HMs from contaminated soil while increasing crop yield. The review highlights the positive effects of biochar by reducing HM bioavailability in contaminated soils. Future work is recommended to ensure that biochars offer a safe and sustainable solution to remediate soils contaminated with HMs.
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Affiliation(s)
- Zubaira Maqbool
- School of Food Science and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Department of Soil Science and Environmental Science, Arid Agriculture University, Rawalpindi, Pakistan
| | - Muhammad Shahbaz Farooq
- School of Food Science and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Rice Research Program, Crop Sciences Institute (CSI), National Agricultural Research Centre (NARC), Park Road, Islamabad 44000, Pakistan
| | - Anum Rafiq
- Institute Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Muhammad Uzair
- National Institute of Genomics and Advanced Biotechnology (NIGAB), National Agriculture Research Center (NARC), Park Road, Islamabad, Pakistan
| | - Muhammad Yousuf
- Pakistan Agriculture Research Council (PARC), G5, Islamabad, Pakistan
| | - Muhammad Ramzan Khan
- National Institute of Genomics and Advanced Biotechnology (NIGAB), National Agriculture Research Center (NARC), Park Road, Islamabad, Pakistan
| | - Shuhao Huo
- School of Food Science and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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