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Yang YM, Naseer M, Zhu Y, Wang BZ, Zhu SG, Chen YL, Ma Y, Ma BL, Guo JC, Wang S, Tao HY, Xiong YC. Iron Nanostructure Primes Arbuscular Mycorrhizal Fungi Symbiosis Tightly Connecting Maize Leaf Photosynthesis via a Nanofilm Effect. ACS NANO 2024. [PMID: 39072481 DOI: 10.1021/acsnano.4c04145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
It is crucial to clarify how the iron nanostructure activates plant growth, particularly in combination with arbuscular mycorrhizal fungi (AMF). We first identified 1.0 g·kg-1 of nanoscale zerovalent iron (nZVI) as appropriate dosage to maximize maize growth by 12.7-19.7% in non-AMF and 18.9-26.4% in AMF, respectively. Yet, excessive nZVI at 2.0 g·kg-1 exerted inhibitory effects while FeSO4 showed slight effects (p > 0.05). Under an appropriate dose, a nano core-shell structure was formed and the transfer and diffusion of electrons between PS II and PS I were facilitated, significantly promoting the reduction of ferricyanide and NADP (p < 0.05). SEM images showed that excessive nZVI particles can form stacked layers on the surface of roots and hyphae, inhibiting water and nutrient uptake. TEM observations showed that excessive nanoparticles can penetrate into root cortical cells, disrupt cellular homeostasis, and substantially elevate Fe content in roots (p < 0.05). This exacerbated membrane lipid peroxidation and osmotic regulation, accordingly restricting photosynthetic capacity and AMF colonization. Yet, appropriate nZVI can be adhered to a mycelium surface, forming a uniform nanofilm structure. The strength of the mycelium network was evidently enhanced, under an increased root colonization rate and an extramatrical hyphal length (p < 0.05). Enhanced mycorrhizal infection was tightly associated with higher gas exchange and Rubisco and Rubisco enzyme activities. This enabled more photosynthetic carbon to input into AMF symbiont. There existed a positive feedback loop connecting downward transfer of photosynthate and upward transport of water/nutrients. FeSO4 only slightly affected mycorrhizal development. Thus, it was the Fe nanostructure but not its inorganic salt state that primed AMF symbionts for better growth.
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Affiliation(s)
- Yu-Miao Yang
- State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Microbial Resources Exploitation and Application of Gansu Province, Institute of Biology, Gansu Academy of Sciences, Lanzhou, Gansu 730000, China
| | - Minha Naseer
- State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - Ying Zhu
- Key Laboratory of Microbial Resources Exploitation and Application of Gansu Province, Institute of Biology, Gansu Academy of Sciences, Lanzhou, Gansu 730000, China
| | - Bao-Zhong Wang
- State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - Shuang-Guo Zhu
- State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - Ying-Long Chen
- The UWA Institute of Agriculture, and School of Agriculture and Environment, The University of Western Australia, Perth, WA 6001, Australia
| | - Yue Ma
- State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - Bao-Luo Ma
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa K1A 0C6, Canada
| | - Jia-Cheng Guo
- State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - Song Wang
- State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - Hong-Yan Tao
- State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - You-Cai Xiong
- State Key Laboratory of Herbage Improvement and Grassland Agroecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China
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Guo S, Xia L, Xia D, Li M, Xu W, Liu L. Enhancing plant resilience: arbuscular mycorrhizal fungi's role in alleviating drought stress in vegetation concrete. FRONTIERS IN PLANT SCIENCE 2024; 15:1401050. [PMID: 38974980 PMCID: PMC11224527 DOI: 10.3389/fpls.2024.1401050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 06/04/2024] [Indexed: 07/09/2024]
Abstract
Introduction Drought stress usually inhibits plant growth, which may increase the difficulty of greening slopes. Methods In this study, we systematically investigated the effects of arbuscular mycorrhizal (AM) fungi on the growth and drought tolerance of two plant species, Festuca elata and Cassia glauca, in a vegetation concrete environment by exogenously inoculating AM fungi and setting three drought levels: well water, moderate drought and severe drought. The results showed that plant growth was significantly inhibited under drought stress; however, AM fungi inoculation significantly promoted plant height, root length, and above- and belowground biomass in these two plant species. Results Compared with, those in the CK treatment, the greatest increases in the net photosynthesis rate, stomatal conductance and transpiration rate in the AM treatment group were 36.72%, 210.08%, and 66.41%, respectively. Moreover, inoculation with AM fungi increased plant superoxide dismutase and catalase activities by 4.70-150.73% and 9.10-95.70%, respectively, and reduced leaf malondialdehyde content by 2.79-55.01%, which alleviated the damage caused by oxidative stress. These effects alleviated the damage caused by oxidative stress and increased the content of soluble sugars and soluble proteins in plant leaves by 1.52-65.44% and 4.67-97.54%, respectively, which further increased the drought adaptability of plants. However, inoculation with AM fungi had different effects on different plants. Conclusion In summary, this study demonstrated that the inoculation of AM fungi in vegetation concrete environments can significantly increase plant growth and drought tolerance. The plants that formed a symbiotic structure with AM fungi had a larger root uptake area, greater water uptake capacity, and greater photosynthesis and gas exchange efficiency. In addition, AM fungi inoculation further increased the drought adaptability of the plants by increasing their antioxidant enzyme activity and regulating their metabolite content. These findings are highly important for promoting plant growth and increasing drought tolerance under drought conditions, especially for potential practical applications in areas such as slope protection, and provide useful references for future ecological engineering and sustainable development.
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Affiliation(s)
- Shiwei Guo
- Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang, Hubei, China
- College of Civil Engineering & Architecture, China Three Gorges University, Yichang, Hubei, China
- Hubei Provincial Engineering Research Center of Cement-based Ecological Restoration Technology (China Three Gorges University), Yichang, Hubei, China
| | - Lu Xia
- Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang, Hubei, China
- College of Civil Engineering & Architecture, China Three Gorges University, Yichang, Hubei, China
- Hubei Provincial Engineering Research Center of Cement-based Ecological Restoration Technology (China Three Gorges University), Yichang, Hubei, China
| | - Dong Xia
- Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang, Hubei, China
- Hubei Provincial Engineering Research Center of Cement-based Ecological Restoration Technology (China Three Gorges University), Yichang, Hubei, China
- College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, China
| | - Mingyi Li
- Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang, Hubei, China
- College of Civil Engineering & Architecture, China Three Gorges University, Yichang, Hubei, China
- Hubei Provincial Engineering Research Center of Cement-based Ecological Restoration Technology (China Three Gorges University), Yichang, Hubei, China
| | - Wennian Xu
- Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang, Hubei, China
- College of Civil Engineering & Architecture, China Three Gorges University, Yichang, Hubei, China
- Hubei Provincial Engineering Research Center of Cement-based Ecological Restoration Technology (China Three Gorges University), Yichang, Hubei, China
| | - Liming Liu
- Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang, Hubei, China
- College of Civil Engineering & Architecture, China Three Gorges University, Yichang, Hubei, China
- Hubei Provincial Engineering Research Center of Cement-based Ecological Restoration Technology (China Three Gorges University), Yichang, Hubei, China
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Hou D, Cui X, Liu M, Qie H, Tang Y, Xu R, Zhao P, Leng W, Luo N, Luo H, Lin A, Wei W, Yang W, Zheng T. The effects of iron-based nanomaterials (Fe NMs) on plants under stressful environments: Machine learning-assisted meta-analysis. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120406. [PMID: 38373376 DOI: 10.1016/j.jenvman.2024.120406] [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: 10/26/2023] [Revised: 01/28/2024] [Accepted: 02/14/2024] [Indexed: 02/21/2024]
Abstract
Mitigating the adverse effects of stressful environments on crops and promoting plant recovery in contaminated sites are critical to agricultural development and environmental remediation. Iron-based nanomaterials (Fe NMs) can be used as environmentally friendly nano-fertilizer and as a means of ecological remediation. A meta-analysis was conducted on 58 independent studies from around the world to evaluate the effects of Fe NMs on plant development and antioxidant defense systems in stressful environments. The application of Fe NMs significantly enhanced plant biomass (mean = 25%, CI = 20%-30%), while promoting antioxidant enzyme activity (mean = 14%, CI = 10%-18%) and increasing antioxidant metabolite content (mean = 10%, CI = 6%-14%), reducing plant oxidative stress (mean = -15%, CI = -20%∼-10%), and alleviating the toxic effects of stressful environments. The observed response was dependent on a number of factors, which were ranked in terms of a Random Forest Importance Analysis. Plant species was the most significant factor, followed by Fe NM particle size, duration of application, dose level, and Fe NM type. The meta-analysis has demonstrated the potential of Fe NMs in achieving sustainable agriculture and the future development of phytoremediation.
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Affiliation(s)
- Daibing Hou
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Xuedan Cui
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Meng Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Hantong Qie
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Yiming Tang
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Ruiqing Xu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Pengjie Zhao
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Wenpeng Leng
- Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100095, PR China
| | - Nan Luo
- Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100095, PR China
| | - Huilong Luo
- Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100095, PR China
| | - Aijun Lin
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Wenxia Wei
- Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100095, PR China.
| | - Wenjie Yang
- Chinese Academy of Environmental Planning, Beijing, 100012, PR China.
| | - Tianwen Zheng
- Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100095, PR China.
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