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Zhang J, Cai Y, Duan L. Rock fragments significantly affect the carbon and nitrogen distribution in the surface soil - Evidences from large number samples of soil rock fragment interfaces in a boreal forest watershed. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 925:171640. [PMID: 38479530 DOI: 10.1016/j.scitotenv.2024.171640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/03/2024] [Accepted: 03/09/2024] [Indexed: 03/23/2024]
Abstract
Rock fragments are widely distributed in soils. The material cycling and the physico-chemical processes of soil ecosystems are both inevitably spatially affected by rock fragments. However, the effect of rock fragments on the spatial distribution characteristics of soil carbon and nitrogen is still not well studied and understood. We carried out a study on the effect of rock fragments on the spatial distribution of soil carbon and nitrogen by mass sampling at the interfaces of rock fragments in a boreal forest watershed ecosystem of northest China. We found that the carbon and nitrogen content of rock fragments interface soil (SRIS) was significantly lower than that of general soil (GS). The content of total soil carbon (TC) and total soil nitrogen (TN) in 0-20 cm SRIS accounted for 73 % and 43 % of those in the GS, respectively. The content of TN in 20-40 cm SRIS was about 43 % of that in the GS. The results of Random Forest Model and Pearson correlation analysis (P < 0.01) indicated that the soil water content (SWC) and soil machinery composition (SMC) contributed most to the variabilities of soil carbon and nitrogen. We also found significant differences in SMC between GS and SRIS. Such evidences suggested that the presence of rock fragments was expected to promote the loss of soil carbon and nitrogen,and consequently influence soil carbon and nitrogen distribution nearby them. Our findings help improve the understanding of the impact of rock fragments on soil carbon and nitrogen distribution and provide new insights into the participation of rock fragments in the material-energy cycle of ecosystems.
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Affiliation(s)
- Jinhao Zhang
- College of Forestry, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Yushan Cai
- College of Forestry, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Liangliang Duan
- College of Forestry, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
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Fungal–Bacterial Networks in the Habitat of SongRong (Tricholoma matsutake) and Driving Factors of Their Distribution Rules. J Fungi (Basel) 2022; 8:jof8060575. [PMID: 35736058 PMCID: PMC9225054 DOI: 10.3390/jof8060575] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/15/2022] [Accepted: 05/25/2022] [Indexed: 12/12/2022] Open
Abstract
Soil origin, mycorrhizal plant partners and environmental factors affect the growth and development of SongRong (Tricholoma matsutake). In order to clarify the relationships of fungi–bacteria networks and various influence factors in the habitat of SongRong, we chose three collection sites with a Quercus mongolica pure forest (plot A without SongRong was used as the control sample site), Q. mongolica mixed Rhododendron dauricum (plot B) and Q. mongolica mixed with R. dauricum and Pinus densiflora (plot C). By using high-throughput sequencing, we obtained a total of 4930 fungal and 55501 bacterial amplicon sequence variants (ASVs) based on internally transcribed spacer ribosomal RNA (ITS rRNA) and 16S ribosomal RNA (16S rRNA) sequencing via the Illumina NovaSeq platform. In the habitat soil of SongRong (plot B and plot C), alpha or beta diversity and species compositions of fungi and bacteria were different from plot A. The fungal–bacterial networks follow the selection rule that few dominant genera account for the greater relative abundance. Forest types, but not the host itself, drove the fungal–bacterial networks of the forest soil, and soil physicochemical characteristics and texture affected their abundance. The abundance of Tricholoma was affected by the fungal and bacterial abundance in the habitat.
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Gu X, Jiang Y, Wang X, Jia H, Li J, Cui Y, Hu J, Mao Q, He X. Differences in aluminum tolerance and immobilization between two indigenous ectomycorrhizal fungi Lactarius deliciosus and Pisolithus tinctorius from Southwest China's forest stands. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 213:112042. [PMID: 33607336 DOI: 10.1016/j.ecoenv.2021.112042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 01/28/2021] [Accepted: 02/06/2021] [Indexed: 06/12/2023]
Abstract
Aluminum (Al) toxicity severely decreases plant growth and productivity in acidic soil globally. Ectomycorrhizal (ECM) fungi can promote host plant's Al-tolerance by acting as a physical barrier or bio-filter. However, little information is available on the role of ECM fungus on Al immobilization with respect to Al-tolerance. This present study aimed to screen a promising indigenous ECM fungus with high Al-tolerance and to understand its role in Al immobilization related to Al-tolerance. Two ECM fungal strains (Lactarius deliciosus 2 and Pisolithus tinctorius 715) isolated from forest stands in Southwest China were cultured in vitro with 0.0, 1.0 or 2.0 mM Al addition for 21 days to compare their Al accumulation and Al-tolerance. Meanwhile, fungal mycelia were incubated in 0.037 mM Al3+ solutions, and then Al3+ concentrations in the solution were determined at time 2, 5, 10, 20, 40, 60, 120, 180, and 240 min, and the Al3+ immobilization characteristics were evaluated using the pseudo-first order, pseudo-second order and intraparticle diffusion models. Results showed that 1.0 or 2.0 mM Al3+ addition significantly increased fungal biomass production by 23% or 41% in L. deliciosus 2, not in P. tinctorius 715. Fungal Al3+ concentrations in L. deliciosus 2 and P. tinctorius 715 were significantly increased by 293% and 103% under 2.0 mM than under 1.0 mM Al3+ addition. The pH values in the culture solution were significantly decreased by 0.43 after 21 d fungus growth but no changes between these two fungi under the same Al3+ addition. Fungal Al3+ immobilization showed a three-stage trend with initially a rapid rate followed a relatively slower rate until reaching equilibrium. The pseudo-second order model was the best (R2 = 0.98 and 0.99 for L. deliciosus 2 and P. tinctorius 715) to fit the experimentally observed data among the three models. Compared to P. tinctorius 715, L. deliciosus 2 also had greater intercept value, cation exchange capacity (CEC), and extracellular Al3+ proportion in fungal mycelia. Additionally, bio-concentration on Al3+, active site numbers for Al3+, boundary layer thickness, CEC, and immobilization on the cell wall in fungal mycelia were involved in ECM fungal Al-tolerance. These results show that both ECM fungi are Al-tolerant while L. deliciosus 2 is a promising indigenous ECM isolate with higher Al-tolerance in Southwest China, and they can be hence applied to the afforestation and ecological restoration in acidic soil.
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Affiliation(s)
- Xirong Gu
- College of Resources and Environment, Centre of Excellence for Soil Biology, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Yanan Jiang
- College of Resources and Environment, Centre of Excellence for Soil Biology, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, China
| | - Xiaohe Wang
- College of Resources and Environment, Centre of Excellence for Soil Biology, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, China
| | - Hao Jia
- College of Resources and Environment, Centre of Excellence for Soil Biology, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, China
| | - Jie Li
- College of Resources and Environment, Centre of Excellence for Soil Biology, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, China
| | - Yao Cui
- College of Resources and Environment, Centre of Excellence for Soil Biology, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, China
| | - Jia Hu
- College of Resources and Environment, Centre of Excellence for Soil Biology, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, China
| | - Qiaozhi Mao
- College of Resources and Environment, Centre of Excellence for Soil Biology, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, China
| | - Xinhua He
- College of Resources and Environment, Centre of Excellence for Soil Biology, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, China; School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia.
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Świsłowski P, Dołhańczuk-Śródka A, Rajfur M. Bibliometric analysis of European publications between 2001 and 2016 on concentrations of selected elements in mushrooms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:22235-22250. [PMID: 32329001 PMCID: PMC7293692 DOI: 10.1007/s11356-020-08693-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
This article presents a bibliometric study of 200 European publications released between 2001 and 2016, about the contamination of mushrooms by selected elements. The analysis includes figures on the type of analyte, its concentration, the species of fungi, and its country of origin. In the literature review, 492 species of mushrooms (wild-growing and cultured) found in 26 European countries and their concentration of 74 associated elements were analysed. The papers, which dealt mainly with the heavy metal (Cd, Cu, Fe, Pb, and Zn) concentrations of mushrooms, primarily came from Turkey, Poland, Spain, and the Czech Republic. More than 50% of the publications provided data about edible mushrooms. The results of the bibliometric analysis showed that over the 16 years, European research on fungal contamination by selected analytes has not lessened in popularity and is ongoing. Many of the studies underlined the need to assess the risk to human health arising from the consumption of contaminated mushrooms taken from various habitats. These results were the effect of, among other things, the strong interest in studies carried out on edible species, in which concentrations of mainly heavy metals that are dangerous to health and are marked were indicated (Cd, Pb, and Hg).
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Affiliation(s)
- Paweł Świsłowski
- Institute of Environmental Engineering and Biotechnology, University of Opole, B. Kominka 6a Street, 45-032, Opole, Poland.
| | - Agnieszka Dołhańczuk-Śródka
- Institute of Environmental Engineering and Biotechnology, University of Opole, B. Kominka 6a Street, 45-032, Opole, Poland
| | - Małgorzata Rajfur
- Institute of Environmental Engineering and Biotechnology, University of Opole, B. Kominka 6a Street, 45-032, Opole, Poland
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Advances in the cultivation of the highly-prized ectomycorrhizal mushroom Tricholoma matsutake. MYCOSCIENCE 2020. [DOI: 10.1016/j.myc.2020.01.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Accumulation and Translocation of Phosphorus, Calcium, Magnesium, and Aluminum in Pinus massoniana Lamb. Seedlings Inoculated with Laccaria bicolor Growing in an Acidic Yellow Soil. FORESTS 2019. [DOI: 10.3390/f10121153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Research Highlights: We demonstrate that ectomycorrhizal (ECM) fungi improve plant aluminum (Al)-tolerance in the field and Laccaria bicolor S238A is a promising ECM isolate. Furthermore, we interpret the underlying nutritional mechanism that ECM inoculation facilitates aboveground biomass production as well as nutrients accumulation and translocation. Background and Objectives: Al toxicity is a primary limiting factor for plants growing in acidic soils. Hydroponic/sand culture studies have shown that some ECM fungi could enhance plant Al-tolerance. However, the underlying mechanisms of ECM fungi in improving plant Al-tolerance in the field are still unknown. To fill this knowledge gap, the present study aimed to examine roles of ECM inoculation in biomass production, accumulation and translocation of nutrients and Al in the host plant grown in the field under Al treatment. Materials and Methods: 4-week-old Pinus massoniana seedlings were inoculated with three Laccaria bicolor isolates (L. bicolor 270, L. bicolor S238A or L. bicolor S238N) and grown in an acidic yellow soil under 1.0 mM Al treatment for 12 weeks in the field. Biomass production, accumulation and translocation of P, Ca, Mg, and Al were investigated in these 16-week-old P. massoniana seedlings. Results: All three of these L. bicolor isolates improved biomass production as well as P, Ca and Mg accumulation in P. massoniana seedlings. Moreover, the three ECM isolates facilitated the translocation of P, Ca, and Mg to aboveground in response to Al treatment, particularly when seedlings were inoculated with L. bicolor S238A. In addition, both L. bicolor 270 and L. bicolor S238A had no apparent effects on Al accumulation, while enhanced Al translocation to aboveground. In contrast, L. bicolor S238N decreased Al accumulation but had no significant effect on Al translocation. Conclusions: ECM fungi in the field improved plant Al-resistance by increasing nutrient uptake, and this was mostly due to translocation of P, Ca, and Mg to aboveground, not by decreasing the uptake and translocation of Al.
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Shan L, Wang D, Li Y, Zheng S, Xu W, Shang Y. Identification of the Pol Gene as a Species-Specific Diagnostic Marker for Qualitative and Quantitative PCR Detection of Tricholoma matsutake. Molecules 2019; 24:molecules24030455. [PMID: 30696007 PMCID: PMC6384867 DOI: 10.3390/molecules24030455] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 01/22/2019] [Accepted: 01/24/2019] [Indexed: 11/16/2022] Open
Abstract
Tricholoma matsutake is a rare, precious, and wild edible fungus that could not be cultivated artificially until now. This situation has given way to the introduction of fake T. matsutake commodities to the mushroom market. Among the methods used to detect food adulteration, amplification of species-specific diagnostic marker is particularly important and accurate. In this study, the Pol gene is reported as a species-specific diagnostic marker to identify three T. matsutake varieties and 10 other types of edible mushrooms through qualitative and quantitative PCR. The PCR results did not reveal variations in the amplified region, and the detection limits of qualitative and quantitative PCR were found to be 8 ng and 32 pg, respectively. Southern blot showed that the Pol gene exists as a single copy in the T. matsutake genome. The method that produced the purest DNA of T. matsutake in this study was also determined, and the high-concentration salt precipitation method was confirmed to be the most suitable among the methods tested. The assay proposed in this work is applicable not only to the detection of raw materials but also to the examination of processed products containing T. matsutake.
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Affiliation(s)
- Luying Shan
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Yunnan 650500, China.
| | - Dazhou Wang
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Yunnan 650500, China.
| | - Yinjiao Li
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Yunnan 650500, China.
| | - Shi Zheng
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Yunnan 650500, China.
| | - Wentao Xu
- Beijing Laboratory of Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
| | - Ying Shang
- Yunnan Institute of Food Safety, Kunming University of Science and Technology, Yunnan 650500, China.
- Beijing Laboratory of Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
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Li Q, Xiong C, Li X, Jin X, Huang W. Ectomycorrhization of Tricholoma matsutake with Quercus aquifolioides affects the endophytic microbial community of host plant. J Basic Microbiol 2018; 58:238-246. [PMID: 29359810 DOI: 10.1002/jobm.201700506] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 12/19/2017] [Accepted: 12/30/2017] [Indexed: 11/10/2022]
Abstract
Tricholoma matsutake (S. Ito et Imai) is an ectomycorrhizal basidiomycete associated with Pinaceae and Fagaceae trees in the Northern Hemisphere. It is still unknown whether the symbiotic relationship with this ectomycorrhiza could affect the host plant's endophytic microbial community. In this study, we used high throughput sequencing to analyze the endophytic microbial communities of different Quercus aquifolioides tissues with or without T. matsutake partner. About 35,000 clean reads were obtained per sample, representing 34 bacterial phyla and 7 fungal phyla. We observed 3980 operational taxonomic units (OTUs) of bacteria and 457 OTUs of fungi at a 97% similarity level. Three bacterial phyla, Proteobacteria, Cyanobacteria, and Bacteroidetes, and the fungal phylum Ascomycota were dominant in all tissues. The relative abundance of these taxa differed significantly between Q. aquifolioides tissues with and without T. matsutake partner (p < 0.05). The bacterial genus Pseudomonas and the fungal genus Cryptosporiopsis were more abundant in mycorrhized roots than in control roots. This study showed that the community structure and dominant species of endophytic microbial communities in Q. aquifolioides tissues might be altered by colonization with T. matsutake. This work provides a new insight into the interactions between ectomycorrhizal fungus and host plant.
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Affiliation(s)
- Qiang Li
- Biotechnology and Nuclear Technology Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu, Sichuan, P. R. China.,Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, P. R. China
| | - Chuan Xiong
- Biotechnology and Nuclear Technology Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu, Sichuan, P. R. China
| | - Xiaolin Li
- Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu, Sichuan, P. R. China
| | - Xin Jin
- Biotechnology and Nuclear Technology Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu, Sichuan, P. R. China
| | - Wenli Huang
- Biotechnology and Nuclear Technology Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu, Sichuan, P. R. China
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Saito C, Ogawa W, Kobayashi H, Yamanaka T, Fukuda M, Yamada A. In vitro ectomycorrhization of Tricholoma matsutake strains is differentially affected by soil type. MYCOSCIENCE 2018. [DOI: 10.1016/j.myc.2017.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Fahad ZA, Bolou-Bi EB, Köhler SJ, Finlay RD, Mahmood S. Fractionation and assimilation of Mg isotopes by fungi is species dependent. ENVIRONMENTAL MICROBIOLOGY REPORTS 2016; 8:956-965. [PMID: 27588362 DOI: 10.1111/1758-2229.12459] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 08/18/2016] [Accepted: 08/25/2016] [Indexed: 06/06/2023]
Abstract
Symbiotic ectomycorrhizal fungi mobilize nutrients from both organic and inorganic substrates and supply them to their host plants. Their role in mobilizing base cations and phosphorus from mineral substrates through weathering has received increasing attention in recent years but the processes involved remain to be elucidated. We grew selected ectomycorrhizal and nonmycorrhizal fungi in axenic systems containing mineral and organic substrates and examined their capacity to fractionate and assimilate stable isotopes of magnesium. The mycorrhizal fungi were significantly depleted in heavy isotopes with the lowest Δ26 Mg values (the difference between δ26 Mg in fungal tissue and δ26 Mg in the substrate) compared with nonmycorrhizal fungi, when grown on mineral substrates containing granite particles. The ectomycorrhizal fungi accumulated significantly higher concentrations of Mg, K and P than the nonmycorrhizal fungi. There was a highly significant statistical relationship between δ26 Mg tissue signature and mycelial concentration of Mg, with a clear separation between most ectomycorrhizal fungi and the nonmycorrhizal fungi. These results are consistent with the idea that ectomycorrhizal fungi have evolved efficient mechanisms to mobilize, transport and store Mg within their mycelia.
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Affiliation(s)
- Zaenab A Fahad
- Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Uppsala, SE, 750 07, Sweden
| | - Emile B Bolou-Bi
- Department of Earth Sciences, Uppsala University, Uppsala, SE, 752 36, Sweden
- Institut d'Ecologie et des Sciences de l'Environnement IEES Paris, équipe Géomicrobiologie des sols et des eaux, Université de Paris-Est Créteil Val de Marne, Créteil Cedex, FR, 94 010, France
| | - Stephan J Köhler
- Department of Aquatic Sciences and Assessment, Soil-Water-Environment Center, Swedish University of Agricultural Sciences, Uppsala, SE, 750 07, Sweden
| | - Roger D Finlay
- Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Uppsala, SE, 750 07, Sweden
| | - Shahid Mahmood
- Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Uppsala, SE, 750 07, Sweden
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