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Chen W, Li X, Wei L, Chen B, Han C, Duan Y, Chen C. Functional Differentiation of the Succinate Dehydrogenase Subunit SdhC Governs the Sensitivity to SDHI Fungicides, ROS Homeostasis, and Pathogenicity in Fusarium asiaticum. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:10314-10327. [PMID: 38661317 DOI: 10.1021/acs.jafc.4c02179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Succinate dehydrogenase (SDH) is an integral component of the tricarboxylic acid cycle (TCA) and respiratory electron transport chain (ETC), targeted by succinate dehydrogenase inhibitors (SDHIs). Fusarium asiaticum is a prominent phytopathogen causing Fusarium head blight (FHB) on wheat. Here, we characterized the functions of the FaSdhA, FaSdhB, FaSdhC1, FaSdhC2, and FaSdhD subunits. Deletion of FaSdhA, FaSdhB, or FaSdhD resulted in significant growth defects in F. asiaticum. The FaSdhC1 or FaSdhC2 deletion mutants exhibited substantial reductions in fungal growth, conidiation, virulence, and reactive oxygen species (ROS). The FaSdhC1 expression was significantly induced by pydiflumetofen (PYD). The ΔFaSdhC1 mutant displayed hypersensitivity to SDHIs, whereas the ΔFaSdhC2 mutant exhibited resistance against most SDHIs. The transmembrane domains of FaSdhC1 are essential for regulating mycelial growth, virulence, and sensitivity to SDHIs. These findings provided valuable insights into how the two SdhC paralogues regulated the functional integrity of SDH, ROS homeostasis, and the sensitivity to SDHIs in phytopathogenic fungi.
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Affiliation(s)
- Wenchan Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China
| | - Xiujuan Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Lingling Wei
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Bin Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Chenyang Han
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Yabing Duan
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Changjun Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
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2
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Zhang X, Peck LD, Flood J, Ryan MJ, Barraclough TG. Temperature contributes to host specialization of coffee wilt disease (Fusarium xylarioides) on arabica and robusta coffee crops. Sci Rep 2023; 13:9327. [PMID: 37291178 PMCID: PMC10250448 DOI: 10.1038/s41598-023-36474-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 06/04/2023] [Indexed: 06/10/2023] Open
Abstract
Coffee wilt disease, caused by the fungus Fusarium xylarioides, is a vascular wilt disease that has affected coffee production in sub-Saharan Africa over the past century. Today, the disease has two host-specific populations specialising on arabica and robusta coffee crops, which grow at high and low altitude, respectively. Here we test whether adaptation to different temperatures contributes to specialisation of the fungi on each crop. Firstly, climate models show that the severity of the arabica and robusta populations of coffee wilt disease correlates with temperature. The robusta population shows higher peak severity than the arabica population overall, but the latter has greater cold tolerance. Secondly, growth assays of thermal performance of fungal strains in vitro show that, while robusta strains grow faster than arabicas at intermediate temperatures, the arabica strains have higher sporulation and spore germination rates at temperatures below 15ºC. The match between environmental patterns of severity in nature with thermal performance of fungal cultures in the laboratory supports a role for temperature adaptation in specialisation on arabica and robusta coffee. Extrapolating our temperature-models to future climate change predicts that disease severity could decline on average due to increased temperature but could increase in some coffee-growing regions.
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Affiliation(s)
- Xiuhan Zhang
- Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire, SL5 7PY, UK
| | - Lily D Peck
- Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire, SL5 7PY, UK
- CABI, Bakeham Lane, Egham, TW20 9TY, Surrey, UK
| | - Julie Flood
- CABI, Bakeham Lane, Egham, TW20 9TY, Surrey, UK
| | | | - Timothy G Barraclough
- Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire, SL5 7PY, UK.
- Department of Biology, University of Oxford, 11a Mansfield Rd, Oxford, OX1 3SZ, UK.
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3
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Zhang TW, Wu DL, Li WD, Hao ZH, Wu XL, Xing YJ, Shi JR, Li Y, Dong F. Occurrence of Fusarium mycotoxins in freshly harvested highland barley (qingke) grains from Tibet, China. Mycotoxin Res 2023:10.1007/s12550-023-00487-1. [PMID: 37237114 DOI: 10.1007/s12550-023-00487-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 05/14/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023]
Abstract
Highland barley, also called "qingke" in Tibetan, is mainly cultivated in the Tibetan Plateau of China and has been used as a major staple food for Tibetans. Recently, Fusarium head blight (FHB) of qingke was frequently observed around the Brahmaputra River in Tibet. Considering the importance of qingke for Tibetans, the assessment of Fusarium mycotoxin contamination is essential for food safety. In this study, a total of 150 freshly harvested qingke grain samples were obtained from three regions around the Brahmaputra River in Tibet (China) in 2020. The samples were investigated for the occurrence of 20 Fusarium mycotoxins using high-performance liquid chromatography-tandem mass spectrometry (HPLC‒MS/MS). The most frequently occurring mycotoxin was enniatin B (ENB) (46%), followed by enniatin B1 (ENB1) (14.7%), zearalenone (ZEN) (6.0%), enniatin A1 (ENA1) (3.3%), enniatin A (ENA) (1.3%), beauvericin (BEA) (0.7%), and nivalenol (NIV) (0.7%). Due to the increase in altitude, the cumulative precipitation level and average temperature decreased from the downstream to the upstream of the Brahmaputra River; this directly correlated to the contamination level of ENB in qingke, which gradually decreased from downstream to upstream. In addition, the level of ENB in qingke obtained from qingke-rape rotation was significantly lower than that from qingke-wheat and qingke-qingke rotations (p < 0.05). These results disseminated the occurrence of Fusarium mycotoxins and provided further understanding of the effect of environmental factors and crop rotation on Fusarium mycotoxins.
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Affiliation(s)
- T W Zhang
- Institution of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850000, People's Republic of China
| | - D L Wu
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, People's Republic of China
| | - W D Li
- College of Food Science, Xizang Agricultural and Animal Husbandry University, Linzhi, 860000, People's Republic of China
| | - Z H Hao
- Institution of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850000, People's Republic of China
| | - X L Wu
- Institution of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850000, People's Republic of China
| | - Y J Xing
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, People's Republic of China
| | - J R Shi
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, People's Republic of China
| | - Y Li
- Institution of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850000, People's Republic of China.
- College of Food Science, Xizang Agricultural and Animal Husbandry University, Linzhi, 860000, People's Republic of China.
| | - F Dong
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, People's Republic of China.
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4
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Liu X, Wang L, Choera T, Fang X, Wang G, Chen W, Lee YW, Mohamed SR, Dawood DH, Shi J, Xu J, Keller NP. Paralogous FgIDO genes with differential roles in tryptophan catabolism, fungal development and virulence in Fusarium graminearum. Microbiol Res 2023; 272:127382. [PMID: 37030080 DOI: 10.1016/j.micres.2023.127382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/23/2023] [Accepted: 04/05/2023] [Indexed: 04/10/2023]
Abstract
Indoleamine 2,3-dioxygenase (Ido) is a tryptophan-degrading enzyme that is widely distributed across species. Ido catalyzes the first step of tryptophan (TRP) degradation and drives the de novo synthesis of nicotinamide adenine dinucleotide (NAD+) coenzymes via the kynurenine (KYN) pathway. The budding yeast Saccharomyces cerevisiae possesses a single IDO gene (BNA2) that is responsible for NAD+ synthesis, whereas a number of fungal species contain multiple IDO genes. However, the biological roles of IDO paralogs in plant pathogens remain unclear. In the current study, we identified three FgIDOs from the wheat head blight fungus Fusarium graminearum. FgIDOA/B/C expression was significantly induced upon TRP treatment. Targeted disruption of FgIDOA and/or FgIDOB caused different levels of NAD+ auxotrophy, thus resulting in pleotropic phenotypic defects. Loss of FgIDOA resulted in abnormal conidial morphology, reduced mycelial growth, decreased virulence in wheat heads and reduced deoxynivalenol accumulation. Exogenous addition of KYN or various intermediates involved in the KYN pathway rescued auxotrophy of the mutants. Metabolomics analysis revealed shifts toward alternative TRP degradation pathways to melatonin and indole derivatives in mutants lacking FgIDOB. Upregulation of partner genes in auxotrophic mutants and the capacity to rescue the auxotroph by overexpressing a partner gene indicated functional complementation among FgIDOA/B/C. Taken together, the results of this study provide insights into differential roles in paralogous FgIDOs and how fungal TRP catabolism modulates fungal development and virulence.
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Affiliation(s)
- Xin Liu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China; Department of Medical Microbiology and Immunology, Department of Bacteriology, University of Wisconsin-Madison, Madison 53706, WI, USA; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Liwen Wang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Tsokyi Choera
- Department of Medical Microbiology and Immunology, Department of Bacteriology, University of Wisconsin-Madison, Madison 53706, WI, USA
| | - Xin Fang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Gang Wang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Wenhua Chen
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China
| | - Yin-Won Lee
- School of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Sherif Ramzy Mohamed
- Food Toxicology and Contaminants Department, National Research Centre, Giza 12622, Egypt
| | - Dawood H Dawood
- Department of Agriculture Chemistry, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
| | - Jianrong Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Jianhong Xu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China.
| | - Nancy P Keller
- Department of Medical Microbiology and Immunology, Department of Bacteriology, University of Wisconsin-Madison, Madison 53706, WI, USA.
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5
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Dong F, Chen X, Lei X, Wu D, Zhang Y, Lee YW, Mokoena MP, Olaniran AO, Li Y, Shen G, Liu X, Xu JH, Shi JR. Effect of Crop Rotation on Fusarium Mycotoxins and Fusarium Species in Cereals in Sichuan Province (China). PLANT DISEASE 2023; 107:1060-1066. [PMID: 36122196 DOI: 10.1094/pdis-01-22-0024-re] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The present study was performed to evaluate the effect of crop rotation on Fusarium mycotoxins and species in cereals in Sichuan Province. A total of 311 cereal samples were randomly collected and analyzed from 2018 to 2019 in Sichuan Province. The results of mycotoxin analysis showed that the major trichothecene mycotoxins in Sichuan Province were nivalenol (NIV) and deoxynivalenol (DON), and the mean concentration of total trichothecenes (including NIV, fusarenone X [4ANIV], DON, 3-acetyldeoxynivalenol [3ADON], and 15-acetyldeoxynivalenol [15ADON]) in wheat was significantly higher than that in maize and rice. The concentration of total trichothecenes in the succeeding crops was significantly higher than that in the previous crops. In addition, wheat grown after maize had reduced incidence and concentration of trichothecene mycotoxins compared with that grown after rice, and ratooning rice grown after rice had increased incidence and concentration of trichothecene mycotoxins. Our data indicated that Fusarium asiaticum with the NIV chemotype was predominant in wheat and rice samples, while the number of the NIV chemotypes of F. asiaticum and Fusarium meridionale and the 15ADON chemotype of Fusarium graminearum in maize were almost the same. Although the composition of Fusarium species was affected by crop rotations, there were no differences when comparing the same crop rotation except for the maize-wheat rotation. Moreover, the same species and chemotype of Fusarium strains originated from different crops in various rotations, but there were no significant differences in pathogenicity in wheat and rice. These results contribute to the knowledge of the effect of crop rotation on Fusarium mycotoxins and species affecting cereals in Sichuan Province, which may lead to improved strategies for control of Fusarium mycotoxins and fungal disease in China.
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Affiliation(s)
- Fei Dong
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P.R. China
- School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, South Africa
| | - Xiangxiang Chen
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Xinyu Lei
- Institute of Quality Standard and Testing Technology for Agro-products, Sichuan Academy of Agricultural Sciences, Chengdu 610066, P.R. China
| | - Deliang Wu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P.R. China
| | - Yifan Zhang
- Institution of Agricultural Product Quality Standard and Testing Research, Tibet Academy and Animal Husbandry Sciences, Lhasa 850032, P.R. China
| | - Yin-Won Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Mduduzi P Mokoena
- School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, South Africa
| | - Ademola O Olaniran
- School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, South Africa
| | - Ying Li
- Institution of Agricultural Product Quality Standard and Testing Research, Tibet Academy and Animal Husbandry Sciences, Lhasa 850032, P.R. China
| | - Guanghui Shen
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P.R. China
| | - Xin Liu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P.R. China
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Jian Hong Xu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P.R. China
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Jian Rong Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P.R. China
- School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, South Africa
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
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6
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An accurate and efficient method for simultaneous determination of 16 trichothecenes in maize and wheat by UHPLC-Q-Orbitrap-HRMS combined one-step pretreatment with a novel isotope multipoint calibration strategy. Food Control 2023. [DOI: 10.1016/j.foodcont.2023.109708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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7
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Wu L, Wu Z, Zhao F, Hahn M, Zhou M, Hou Y. Activity and cell toxicology of fluazinam on Fusarium graminearum. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 188:105253. [PMID: 36464359 DOI: 10.1016/j.pestbp.2022.105253] [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: 06/13/2022] [Revised: 09/17/2022] [Accepted: 09/20/2022] [Indexed: 06/17/2023]
Abstract
Fusarium graminearum is an important plant pathogen and the causal agent of Fusarium head blight (FHB). At present, the principal method of controlling FHB is through fungicides. Fluazinam is an agent with strong broad-spectrum antifungal activity and has been used to control many diseases. However, there are no reported uses of fluazinam for controlling FHB. This study reports the activity and cell toxicology mechanisms of fluazinam on the filamentous fungus F. graminearum and its effect on fungal growth and development. The activity of fluazinam was tested for 95 wild-type field strains of F. graminearum. The EC50 values (the 50% effective concentration) of fluazinam for inhibition of mycelial growth and spore germination ranged from 0.037 μg/ml to 0.179 μg/ml and from 0.039 μg/ml to 0.506 μg/ml, respectively. The fluazinam sensitivity of these strains varied in 4.9 and 13.0 folds, implying that the target of the fungicide remained unchanged. After treatment with 0.3 μg/ml (≈EC90) fluazinam, the production of conidia was reduced, and the cell wall and cell membrane had shrunked; the cell nucleus and septum morphology, cell membrane permeability, and sexual development were not affected. When treated with 0.1 μg/ml (≈EC50) or 0.3 μg/ml fluazinam, the mycelial respiration and deoxynivalenol (DON) synthesis of F. graminearum were decreased. Confocal images showed that the formation of toxisomes was disturbed after fluazinam treatment, suggesting that fluazinam reduces DON synthesis by inhibiting toxisome formation. Infection of wheat coleoptiles revealed that fluazinam had a strong protective activity against F. graminearum. At 250 μg/ml fluazinam the control efficacy of protective treatments reached 100% and controlled strains resistant to carbendazim. These results contribute to the understanding of the mode of action of fluazinam and its application.
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Affiliation(s)
- Luoyu Wu
- College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Pesticide, Nanjing, Jiangsu Province 210095, China
| | - Zhiwen Wu
- College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Pesticide, Nanjing, Jiangsu Province 210095, China
| | - Feifei Zhao
- College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Pesticide, Nanjing, Jiangsu Province 210095, China
| | - Matthias Hahn
- Department of Biology, University of Kaiserslautern, Germany
| | - Mingguo Zhou
- College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Pesticide, Nanjing, Jiangsu Province 210095, China.
| | - Yiping Hou
- College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Pesticide, Nanjing, Jiangsu Province 210095, China.
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8
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A predictive model on deoxynivalenol in harvested wheat in China: revealing the impact of the environment and agronomic practicing. Food Chem 2022; 405:134727. [DOI: 10.1016/j.foodchem.2022.134727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 10/05/2022] [Accepted: 10/21/2022] [Indexed: 11/24/2022]
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9
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Sun C, Li X, Huang B, Li N, Wang A, An C, Jiang J, Shen Y, Wang C, Zhan S, Gooneratne R, Cui H, Wang Y. Construction and characterization of ethyl cellulose-based nano-delivery system for phenamacril. Int J Biol Macromol 2022; 221:1251-1258. [PMID: 36070820 DOI: 10.1016/j.ijbiomac.2022.08.208] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 08/25/2022] [Accepted: 08/31/2022] [Indexed: 11/15/2022]
Abstract
Fungicide-resistant Fusarium has become a threaten to wheat production. Novel fungicide formulations can improve the efficacy of active ingredient and minimize the emergence of resistance. Encapsulation of fungicides in biodegradable carriers, especially, in polysaccharide, is a feasible approach to develop environment-friendly and efficient formulation. This study focused on the synthesis of ethyl cellulose-based phenamacril nano-delivery system by combining emulsion-solvent evaporation and high-pressure homogenization technology to improve the control of fusarium head blight in wheat. Emulsifier 125 and Tersperse 2500 were screened from eleven commonly used surfactants. Emulsifier 125 and Tersperse 2500 in a ratio of 2:1 and phenamacril nanocapsules with the mean particle size of 152.5 ± 1.3 nm were prepared. These showed excellent storage stability and wettability on crop leaves. A bioassay comparing the nanocapsules with a commercial preparation against Fusarium graminearum showed significantly improved biological activity. This formulation could be used to effectively not only to control fusarium head blight but also delay the occurrence of resistance.
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Affiliation(s)
- Changjiao Sun
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Xingye Li
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Bingna Huang
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Ningjun Li
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Anqi Wang
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Changcheng An
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Jiajun Jiang
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Yue Shen
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Chong Wang
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Shenshan Zhan
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Ravi Gooneratne
- Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand
| | - Haixin Cui
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China
| | - Yan Wang
- Institute of Environment and Sustainable Development in Agricultural, Chinese Academy of Agricultural Sciences, No.12 South Street of Zhongguancun, Haidian District, Beijing 100081, China.
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10
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Chen Y, Zhang R, Tong E, Wu P, Chen J, Zhao D, Pan X, Wang J, Wu X, Zhang H, Qi X, Wu Y, Fang L, Zhou B. Occurrence and Exposure Assessment of Deoxynivalenol and Its Acetylated Derivatives from Grains and Grain Products in Zhejiang Province, China (2017–2020). Toxins (Basel) 2022; 14:toxins14090586. [PMID: 36136524 PMCID: PMC9501392 DOI: 10.3390/toxins14090586] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/18/2022] [Accepted: 08/22/2022] [Indexed: 11/27/2022] Open
Abstract
Deoxynivalenol (DON) together with its acetylated derivatives cause detrimental effects on human health, and the purpose of this study was to assess the prevalence of DON and its acetylated derivatives from grains and grain products in Zhejiang province, China, and to assess the risk of DON and its acetylated derivatives due to multiple consumptions of grains and grain products among the Zhejiang population. Food samples numbering 713 were collected, and the LC-MS/MS method was used to determine the toxins. The levels of toxins from grains and grain products were relatively low: DON was the toxin at the highest levels. The food frequency questionnaire was used to collect food consumption data. The result of exposure assessments showed that the population was overall at low levels of toxin exposure. The probable mean group daily intake of toxins was 0.21 μg/kg bw/day, which was far from the group provisional maximum tolerable daily intake of 1 μg/kg bw/day, but 0.71% of participants were at high exposure levels. Rice and dried noodles (wheat-based food) were the main sources of toxin exposure, and reducing the consumption of rice and dried noodles while consuming more of other foods with lower levels of toxins is recommended.
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Affiliation(s)
- Yiming Chen
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
- Department of Epidemiology and Health Statistics, School of Public Health, Faculty of Medicine, Hangzhou Normal University, Hangzhou 311121, China
| | - Ronghua Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Enyu Tong
- Department of Epidemiology and Health Statistics, School of Public Health, Faculty of Medicine, Hangzhou Normal University, Hangzhou 311121, China
| | - Pinggu Wu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Jiang Chen
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Dong Zhao
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Xiaodong Pan
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Jikai Wang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Xiaoli Wu
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Hexiang Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Xiaojuan Qi
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Yinyin Wu
- Department of Epidemiology and Health Statistics, School of Public Health, Faculty of Medicine, Hangzhou Normal University, Hangzhou 311121, China
- Correspondence: (B.Z.); (L.F.); (Y.W.); Tel.: +86-15268588228 (B.Z.); +86-15168287896 (L.F.); +86-13588719343 (Y.W.)
| | - Lei Fang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
- Department of Critical Care Medicine, Sir Run Run Shaw Hospital, Zhejiang University College of Medicine, Hangzhou 310020, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou 310020, China
- Correspondence: (B.Z.); (L.F.); (Y.W.); Tel.: +86-15268588228 (B.Z.); +86-15168287896 (L.F.); +86-13588719343 (Y.W.)
| | - Biao Zhou
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
- Correspondence: (B.Z.); (L.F.); (Y.W.); Tel.: +86-15268588228 (B.Z.); +86-15168287896 (L.F.); +86-13588719343 (Y.W.)
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11
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Aasa A, Fru F, Adelusi O, Oyeyinka S, Njobeh P. A review of toxigenic fungi and mycotoxins in feeds and food commodities in West Africa. WORLD MYCOTOXIN J 2022. [DOI: 10.3920/wmj2021.2766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Fungal contamination is a threat to food safety in West Africa with implications for food and feed due to their climate, which is characterised by high temperatures and high relative humidity, which are environmental favourable for fast fungal growth and mycotoxin production. This report gives perspective on studies on toxigenic fungi (Aspergillus, Fusarium and Penicillium) and their toxins, mainly aflatoxins, fumonisins and ochratoxins commonly found in some West African countries, including Benin, Burkina Faso, Gambia, Ghana, Ivory Coast, Mali, Nigeria, Senegal, Sierra Leone, and Togo. Only four of these countries have mycotoxins regulations in place for feeds and food products (Ghana, Ivory Coast, Nigeria, and Senegal). Food commodities that are widely consumed and were thoroughly investigated in this region include cereals, peanuts, cassava chips (flakes), cassava flour, chilies, peanuts, locust beans, melon, and yam products. In conclusion, authorities and scientists needed to consider research and approaches to monitor mycotoxins in foods and feeds produced and consumed in West Africa.
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Affiliation(s)
- A.O. Aasa
- Department of Biotechnology and Food Technology, Faculty of Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa
| | - F.F. Fru
- Department of Biotechnology and Food Technology, Faculty of Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa
| | - O.A. Adelusi
- Department of Biotechnology and Food Technology, Faculty of Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa
| | - S.A. Oyeyinka
- Department of Biotechnology and Food Technology, Faculty of Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa
| | - P.B. Njobeh
- Department of Biotechnology and Food Technology, Faculty of Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa
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12
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Yan Z, Chen W, van der Lee T, Waalwijk C, van Diepeningen AD, Feng J, Zhang H, Liu T. Evaluation of Fusarium Head Blight Resistance in 410 Chinese Wheat Cultivars Selected for Their Climate Conditions and Ecological Niche Using Natural Infection Across Three Distinct Experimental Sites. FRONTIERS IN PLANT SCIENCE 2022; 13:916282. [PMID: 35712562 PMCID: PMC9195592 DOI: 10.3389/fpls.2022.916282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 05/05/2022] [Indexed: 06/15/2023]
Abstract
Exploiting wheat cultivars with stable resistance to Fusarium Head blight (FHB) and toxin accumulation is a cost-effective and environmentally friendly strategy to reduce the risk of yield losses and contamination with mycotoxins. To facilitate the deployment of stable cultivar resistance, we evaluated FHB resistance and resistance to mycotoxin accumulation in 410 wheat lines bred by local breeders from four major wheat growing regions in China after natural infection at three distinct locations (Hefei, Yangzhou and Nanping). Significant differences in disease index were observed among the three locations. The disease indexes (DI's) in Nanping were the highest, followed by Yangzhou and Hefei. The distribution of DI's in Yangzhou showed the best discrimination of FHB resistance in cultivars. Growing region and cultivar had significant effect on DI and mycotoxins. Among the climate factors, relative humidity and rainfall were the key factors resulting in the severe disease. Even though most cultivars were still susceptible to FHB under the strongly conducive conditions applied, the ratio of resistant lines increased in the Upper region of the Yangtze River (UYR) and the Middle and Lower Region of the Yangtze River (MLYR) between 2015 and 2019. Deoxynivalenol (DON) was the dominant mycotoxin found in Hefei and Yangzhou, while NIV was predominant in Nanping. Disease indexes were significantly correlated with DON content in wheat grain.
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Affiliation(s)
- Zhen Yan
- College of Plant Protection, Gansu Agricultural University, Lanzhou, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng, China
| | - Wanquan Chen
- College of Plant Protection, Gansu Agricultural University, Lanzhou, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- National Agricultural Experimental Station for Plant Protection, Gangu, Ministry of Agriculture and Rural Affairs, Tianshui, China
| | - Theo van der Lee
- Wageningen University and Research Center, Wageningen, Netherlands
| | - Cees Waalwijk
- Wageningen University and Research Center, Wageningen, Netherlands
| | | | - Jie Feng
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hao Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- National Agricultural Experimental Station for Plant Protection, Gangu, Ministry of Agriculture and Rural Affairs, Tianshui, China
| | - Taiguo Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- National Agricultural Experimental Station for Plant Protection, Gangu, Ministry of Agriculture and Rural Affairs, Tianshui, China
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13
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Interindividual Differences in In Vitro Human Intestinal Microbial Conversion of 3-Acetyl-DON and 15-Acetyl-DON. Toxins (Basel) 2022; 14:toxins14030199. [PMID: 35324696 PMCID: PMC8953914 DOI: 10.3390/toxins14030199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 02/24/2022] [Accepted: 03/04/2022] [Indexed: 02/04/2023] Open
Abstract
In order to evaluate the potential differences between 3-Ac-DON and 15-Ac-DON in the human intestinal microbial metabolism, human fecal samples were anaerobically cultured in vitro. Quantitative fecal microbiota characteristics were obtained by 16S rRNA sequencing, and the data revealed several genera that may be relevant for the transformation of the acetylated DONs. Significant differences in the level of 3-Ac-DON and 15-Ac-DON conversion were observed among microbiota from different human individuals. 3-Ac-DON could be rapidly hydrolyzed; a ten-fold difference was observed between the highest and lowest in vitro conversion after 4 h. However, 15-Ac-DON was not fully transformed in the 4 h culture of all the individual samples. In all cases, the conversion rate of 3-Ac-DON was higher than that of 15-Ac-DON, and the conversion rate of 3-Ac-DON into DON varied from 1.3- to 8.4-fold that of 15-Ac-DON. Based on in vitro conversion rates, it was estimated that 45–452 min is required to convert all 3-Ac-DON to DON, implying that deacetylation of 3-Ac-DON is likely to occur completely in all human individuals during intestinal transit. However, for conversion of 15-Ac-DON, DON formation was undetectable at 4 h incubation in 8 out of the 25 human samples, while for 7 of these 8 samples conversion to DON was detected at 24 h incubation. The conversion rates obtained for these seven samples indicated that it would take 1925–4805 min to convert all 15-Ac-DON to DON, while the other 17 samples required 173–734 min. From these results it followed that for eight of the 25 individuals, conversion of 15-Ac-DON to DON was estimated to be incomplete during the 1848 min intestinal transit time. The results thus indicate substantial interindividual as well as compound specific differences in the deconjugation of acetylated DONs. A spearman correlation analysis showed a statistically significant relationship between deconjugation of both acetyl-DONs at 4 h and 24 h incubation. Based on the in vitro kinetic parameters and their scaling to the in vivo situation, it was concluded that for a substantial number of human individuals the deconjugation of 15-Ac-DON may not be complete upon intestinal transit.
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14
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Romoli JCZ, Silva MV, Pante GC, Hoeltgebaum D, Castro JC, Oliveira da Rocha GH, Capoci IRG, Nerilo SB, Mossini SAG, Micotti da Gloria E, Svidzinski TIE, Graton Mikcha JM, Machinski M. Anti-mycotoxigenic and antifungal activity of ginger, turmeric, thyme and rosemary essential oils in deoxynivalenol (DON) and zearalenone (ZEA) producing Fusarium graminearum. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2022; 39:362-372. [PMID: 34854801 DOI: 10.1080/19440049.2021.1996636] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 10/10/2021] [Indexed: 10/19/2022]
Abstract
This study aimed to evaluate the antimycotoxigenic effect of essential oils (EOs) obtained from four different aromatic plants on the production of deoxynivalenol (DON) and zearalenone (ZEA) by Fusarium graminearum. The EOs from ginger (GEO), turmeric (TEO), thyme (ThEO) and rosemary (REO) were obtained by hydrodistillation and identified by gas chromatography/mass spectrometry (GC/MS). The major compounds found were mostly monoterpenes and sesquiterpenes. The minimum inhibitory concentration (MIC) and minimum fungicide concentration (MFC) were 11.25, 364, 366 and 11,580 µg mL-1 for ThEO, GEO, REO and TEO, respectively. The results evidenced that the assessed EOs inhibited DON and partially ZEA production by F. graminearum. ThEO and GEO were the EOs with most potent antimycotoxigenic action for DON and ZEA, respectively. These EOs have shown promising results in vitro regarding inhibition of mycotoxin production and might be used in the future as substitutes for synthetic fungicides.
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Affiliation(s)
| | - Milena Veronezi Silva
- Department of Basic Health Sciences, Laboratory of Toxicology, State University of Maringá, Brazil
| | - Giseli Cristina Pante
- Department of Basic Health Sciences, Laboratory of Toxicology, State University of Maringá, Brazil
| | - Danielle Hoeltgebaum
- Department of Basic Health Sciences, Laboratory of Toxicology, State University of Maringá, Brazil
| | - Juliana Cristina Castro
- Department of Basic Health Sciences, Laboratory of Toxicology, State University of Maringá, Brazil
| | - Gustavo Henrique Oliveira da Rocha
- Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences, Laboratory of Experimental Toxicology, University of São Paulo, Brazil
| | - Isis Regina Grenier Capoci
- Department of Clinical Analysis and Biomedicine, Laboratory of Medical Mycology, State University of Maringá, Brazil
| | | | | | - Eduardo Micotti da Gloria
- Departament of Agri-Food, Food and Nutrition, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, Brazil
| | | | - Jane Martha Graton Mikcha
- Department of Clinical Analysis and Biomedicine, Laboratory of Medical Mycology, State University of Maringá, Brazil
| | - Miguel Machinski
- Department of Basic Health Sciences, Laboratory of Toxicology, State University of Maringá, Brazil
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15
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Chen L, Yang J, Wang H, Yang X, Zhang C, Zhao Z, Wang J. NX toxins: New threat posed by Fusarium graminearum species complex. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2021.11.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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16
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Gao T, Zhang Y, Shi J, Mohamed SR, Xu J, Liu X. The Antioxidant Guaiacol Exerts Fungicidal Activity Against Fungal Growth and Deoxynivalenol Production in Fusarium graminearum. Front Microbiol 2021; 12:762844. [PMID: 34867894 PMCID: PMC8634675 DOI: 10.3389/fmicb.2021.762844] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 10/08/2021] [Indexed: 11/30/2022] Open
Abstract
The main component of creosote obtained from dry wood distillation—guaiacol—is a natural antioxidant that has been widely used in pharmaceutical and food preservation applications. However, the antifungal mechanism of guaiacol against phytopathogens remains unclear. In this study, we found that guaiacol exerts inhibitory effects against mycelial growth, conidial formation and germination, and deoxynivalenol (DON) biosynthesis in Fusarium graminearum in a dose-dependent manner. The median effective concentration (EC50) value of guaiacol for the standard F. graminearum strain PH-1 was 1.838 mM. Guaiacol strongly inhibited conidial production and germination. The antifungal effects of guaiacol may be attributed to its capability to cause damage to the cell membrane by disrupting Ca2+ transport channels. In addition, the decreased malondialdehyde (MDA) levels and catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD) activity by guaiacol treatment indicate that guaiacol displays activity against DON production by modulating the oxidative response in F. graminearum. Taken together, this study revealed the potentials of antioxidant in inhibiting mycotoxins in F. graminearum.
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Affiliation(s)
- Tao Gao
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Key Laboratory for Control Technology and Standard for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Key Laboratory for Agro-Product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Collaborative Innovation Center for Modern Grain Circulation and Safety, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Yao Zhang
- School of Food Science And Engineering, Jiangsu Ocean University, Lianyungang, China
| | - Jianrong Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Key Laboratory for Control Technology and Standard for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Key Laboratory for Agro-Product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Collaborative Innovation Center for Modern Grain Circulation and Safety, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Sherif Ramzy Mohamed
- Department of Food Toxicology and Contaminant, National Research Centre of Egypt, Giza, Egypt
| | - Jianhong Xu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Key Laboratory for Control Technology and Standard for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Key Laboratory for Agro-Product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Collaborative Innovation Center for Modern Grain Circulation and Safety, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Xin Liu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Key Laboratory for Control Technology and Standard for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Key Laboratory for Agro-Product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Collaborative Innovation Center for Modern Grain Circulation and Safety, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
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17
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Fang X, Dong F, Wang S, Wang G, Wu D, Lee YW, Ramzy Mohamed S, Goda AAK, Xu J, Shi J, Liu X. The FaFlbA mutant of Fusarium asiaticum is significantly increased in nivalenol production. J Appl Microbiol 2021; 132:3028-3037. [PMID: 34865297 DOI: 10.1111/jam.15404] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 09/01/2021] [Accepted: 12/02/2021] [Indexed: 01/12/2023]
Abstract
AIMS Cereals contaminated with type B trichothecene nivalenol (NIV) and its acetylated derivative 4-acetyl-nivalenol (4-AcNIV) are a global mycotoxicological problem threatening the health of humans and livestock. Toxicological studies, quantitative determinations and screening for biodegrading micro-organisms require massive amounts of pure toxins. However, the low yield from fungal cultures and high prices of NIV and 4-AcNIV limit research progress in these areas. This work aimed to select Fusarium asiaticum mutant strains with enhanced production of NIV and 4-AcNIV. METHODS AND RESULTS A total of 62 NIV-producing F. asiaticum strains were isolated and compared regarding their ability to produce NIV. Strain RR108 had the highest yield of NIV among 62 field isolates surveyed and was then genetically modified for higher production. Targeted deletion of the FaFlbA gene, encoding a regulator of G protein signalling protein, resulted in a significant increase in NIV and 4-AcNIV production in the FaFlbA deletion mutant ΔFaFlbA. The expression of three TRI genes involved in the trichothecene biosynthetic pathway was upregulated in ΔFaFlbA. ΔFaFlbA produced the highest amount of NIV and 4-AcNIV when cultured in brown long-grain rice for 21 days, and the yields were 2.07 and 2.84 g kg-1 , respectively. The mutant showed reduced fitness, including reduced conidiation, loss of perithecial development and decreased virulence on wheat heads, which makes it biologically safe for large-scale preparation and purification of NIV and 4-AcNIV. CONCLUSIONS The F. asiaticum mutant strain ΔFaFlbA presented improved production of NIV and 4-AcNIV with reduced fitness and virulence in plants. SIGNIFICANCE AND IMPACT OF THE STUDY Targeted deletion of the FaFlbA gene resulted in increased NIV and 4-AcNIV production. Our results provide a practical approach using genetic modification for large-scale mycotoxin production.
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Affiliation(s)
- Xin Fang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Fei Dong
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China
| | - Shuang Wang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Gang Wang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Deliang Wu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China
| | - Yin-Won Lee
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China.,School of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
| | - Sherif Ramzy Mohamed
- Food Toxicology and Contaminants Department, National Research Centre, Giza, Egypt, Giza, Egypt
| | - Amira Abdel-Karim Goda
- Food Toxicology and Contaminants Department, National Research Centre, Giza, Egypt, Giza, Egypt
| | - Jianhong Xu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Jianrong Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Xin Liu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
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18
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Isolation and characterization of Bacillus amyloliquefaciens MQ01, a bifunctional biocontrol bacterium with antagonistic activity against Fusarium graminearum and biodegradation capacity of zearalenone. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.108259] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Yang X, Zhao Z, Wang J, Yang J, E H, Chen B, He P, Tan Y, Zhou C. Occurrence and Risk Assessment of Dietary Exposure to Deoxynivalenol in Wheat-Based Products Based Different Wheat-Producing Area for the Inhabitants in Shanghai, China. J Fungi (Basel) 2021; 7:1015. [PMID: 34946997 PMCID: PMC8703861 DOI: 10.3390/jof7121015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 01/19/2023] Open
Abstract
Deoxynivalenol (DON) is one of the major mycotoxins that contaminate cereals. In this study, we determined the DON level in wheat-based products from Chinese five main production areas collected in Shanghai and calculated the daily intake of DON for inhabitants using the point evaluation and the probabilistic evaluation based on Monte Carlo simulation. The results showed the positive rates of DON in the products were higher than 80.0%, with the concentrations ranging from 41.8 to 1110 µg/kg. The estimated mean daily intakes of DON for 7- to 10-year-old children and adults groups were below 1 µg/kg bw/day, the provisional maximum tolerable daily intake (PMTDI) set by the Joint FAO/WHO Expert Committee on Food Additives (JECFA), suggesting no health risks for the consumers. However, the 99th percentiles of dietary DON exposures for children and adults exceeded the PMTDI, indicating adverse health effects might occur if the two groups intake highly contaminated wheat-based products. The potential health risks for the two groups exposed to DON in the wheat-based products from the Middle and Lower Yangtze Valley (MLYV) were higher than those from the other areas in China.
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Affiliation(s)
- Xianli Yang
- Laboratory of Quality & Safety Risk Assessment for Agro-Products (Shanghai), Institute for Agro-Food Standards and Testing Technology, Ministry of Agriculture, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (J.W.); (J.Y.); (H.E.)
- Shanghai Co-Elite Agro-Food Testing Technical Service Co., Ltd., Shanghai 201106, China
| | - Zhiyong Zhao
- Laboratory of Quality & Safety Risk Assessment for Agro-Products (Shanghai), Institute for Agro-Food Standards and Testing Technology, Ministry of Agriculture, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (J.W.); (J.Y.); (H.E.)
| | - Jianhua Wang
- Laboratory of Quality & Safety Risk Assessment for Agro-Products (Shanghai), Institute for Agro-Food Standards and Testing Technology, Ministry of Agriculture, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (J.W.); (J.Y.); (H.E.)
| | - Junhua Yang
- Laboratory of Quality & Safety Risk Assessment for Agro-Products (Shanghai), Institute for Agro-Food Standards and Testing Technology, Ministry of Agriculture, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (J.W.); (J.Y.); (H.E.)
| | - Hengchao E
- Laboratory of Quality & Safety Risk Assessment for Agro-Products (Shanghai), Institute for Agro-Food Standards and Testing Technology, Ministry of Agriculture, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (J.W.); (J.Y.); (H.E.)
| | - Bo Chen
- Department of Nutrition and Food Hygiene, School of Public Health, Fudan University, Shanghai 200433, China;
| | - Pengzhen He
- College of Chemistry and Chemical Engineering, Mudanjiang Normal University, Mudanjiang 157012, China;
| | - Yanglan Tan
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai 200031, China;
| | - Changyan Zhou
- Laboratory of Quality & Safety Risk Assessment for Agro-Products (Shanghai), Institute for Agro-Food Standards and Testing Technology, Ministry of Agriculture, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (J.W.); (J.Y.); (H.E.)
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20
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Dong F, Li Y, Chen X, Wu J, Wang S, Zhang X, Ma G, Lee YW, Mokoena MP, Olaniran AO, Xu JH, Shi JR. Analysis of the Fusarium graminearum Species Complex from Gramineous Weeds Near Wheat Fields in Jiangsu Province, China. PLANT DISEASE 2021; 105:3269-3275. [PMID: 33847508 DOI: 10.1094/pdis-11-20-2376-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Several weed species are known as alternative hosts of the Fusarium graminearum species complex (FGSC), and their epidemiological significance in Fusarium head blight (FHB) has been investigated; however, scant information is available regarding FGSC occurrence in weeds near Chinese wheat fields. To evaluate the potential role of gramineous weeds surrounding wheat fields in FHB, 306 FGSC isolates were obtained from 210 gramineous weed samples in 2018 in Jiangsu Province. Among them, 289 were Fusarium asiaticum, and the remainder were F. graminearum. Trichothecene genotype and mycotoxin analyses revealed that 74.3% of the F. asiaticum isolates were the 3-acetyldeoxynivalenol (3ADON) chemotype, and the remainder were the nivalenol (NIV) chemotype. Additionally, 82.4% of F. graminearum isolates were the 15-acetyldeoxynivalenol (15ADON) chemotype, and the remainder were the NIV chemotype. FHB severity and trichothecene analysis indicated that F. asiaticum isolates with the 3ADON chemotype were more aggressive than those with the NIV chemotype in wheat. 3ADON and NIV chemotypes of F. asiaticum isolated from weeds and wheat showed no significant differences in pathogenicity in wheat. All selected F. asiaticum isolates produced perithecia, with little difference between the 3ADON and NIV chemotypes. These results highlight the epidemiology of the FGSC isolated from weeds near wheat fields, with implications for reducing FHB inoculum in China.
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Affiliation(s)
- Fei Dong
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
| | - Yunpeng Li
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Xinyuan Chen
- College of Marine Life and Fisheries, Jiangsu Ocean University, Lianyungang 222005, China
| | - Jirong Wu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Shufang Wang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Xiao Zhang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Guizhen Ma
- College of Marine Life and Fisheries, Jiangsu Ocean University, Lianyungang 222005, China
| | - Yin-Won Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Mduduzi P Mokoena
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
| | - Ademola O Olaniran
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
| | - Jian Hong Xu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Jian Rong Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
- College of Marine Life and Fisheries, Jiangsu Ocean University, Lianyungang 222005, China
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21
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Gao T, He D, Liu X, Ji F, Xu J, Shi J. The pyruvate dehydrogenase kinase 2 (PDK2) is associated with conidiation, mycelial growth, and pathogenicity in Fusarium graminearum. FOOD PRODUCTION, PROCESSING AND NUTRITION 2020. [DOI: 10.1186/s43014-020-00025-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Abstract
Pyruvate dehydrogenase kinase (PDK) is a mitochondrial enzyme in a variety of eukaryotes, including the plant pathogen Fusarium graminearum. This enzyme can reduce the oxidation of glucose to acetyl-coA by phosphorylation and selectively inhibits the activity of pyruvate dehydrogenase (PDH), which is a kind of pyruvate dehydrogenase complex (PDC). In this study, we investigated the F. graminearum pyruvate dehydrogenase kinase encoded by FgPDK2, which is a homologue of Neurospora crassa PDK2. The disruption of the FgPDK2 gene led to several phenotypic defects including effects on mycelial growth, conidiation, pigmentation, and pathogenicity. The mutants also showed decreased resistance to osmotic stress and cell membrane/wall-damaging agents. The FgPDK2 deletion mutant exhibited reduced virulence. All of these defects were restored by genetic complementation of the mutant with the complete FgPDK2 gene. Overall, the results demonstrated that FgPDK2 is crucial for the growth of F. graminearum and can be exploited as a potential molecular target for novel fungicides to control Fusarium head blight caused by F. graminearum.
Graphical abstract
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22
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Risk assessment and spatial analysis of deoxynivalenol exposure in Chinese population. Mycotoxin Res 2020; 36:419-427. [PMID: 32829468 DOI: 10.1007/s12550-020-00406-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 08/07/2020] [Accepted: 08/11/2020] [Indexed: 10/23/2022]
Abstract
Deoxynivalenol (DON) is one of the most commonly found mycotoxins across the world, and it mainly contaminates staple food crops. This study aims to evaluate the dietary exposure of DON and to provide a geographical profile of DON exposure in China. The concentrations of DON and its acetylated derivatives in 15,004 cereal samples (10,192 wheat flour, 1750 maize meal, 892 oat flakes, and 2170 polished rice) were collected from 30 provinces, autonomous regions, or municipalities across China during 2010-2017, through a national food safety risk surveillance system. The consumption data for cereals were obtained from China National Nutrition and Health Survey in 2002, and 67,923 respondents from the same 30 regions were included in the analysis. Among all the cereals considered, the concentration was the highest in wheat flour, with the mean concentration of 250.8 μg/kg. Applying a worst-case scenario, some individuals were possibly at risk, but the probability of acute effects was low. The mean and median exposure for the entire population was 0.61 and 0.36 μg/kg bw/day, respectively, below the (PM) TDI, indicating an acceptable overall health risk in Chinese population. Wheat contributed to 86% of the total DON exposure. Significant discrepancy was observed between the exposure and the contamination of DON. The high-exposure cluster area was in northern China, whilst the most seriously contaminated regions were all located in the southeast, which formed a seriously contaminated area.
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23
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Dong F, Zhang X, Xu JH, Shi JR, Lee YW, Chen XY, Li YP, Mokoena MP, Olaniran AO. Analysis of Fusarium graminearum Species Complex from Freshly Harvested Rice in Jiangsu Province (China). PLANT DISEASE 2020; 104:2138-2143. [PMID: 32539593 DOI: 10.1094/pdis-01-20-0084-re] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Members of Fusarium graminearum species complex (FGSC) are the major pathogens that cause Fusarium head blight (FHB) in cereals worldwide. Symptoms of FHB on rice, including dark staining or browning of rice glumes, were recently observed in Jiangsu Province, China. To improve our understanding of the pathogens involved, 201 FGSC isolates were obtained from freshly harvested rice samples and identified by phylogenetic analyses. Among the 201 FGSC isolates, 196 were F. asiaticum and the remaining 5 were F. graminearum. Trichothecene chemotype and chemical analyses showed that 68.4% of the F. asiaticum isolates were the 3-acetyldeoxynivalenol (3ADON) chemotype and the remainder were the nivalenol (NIV) chemotype. All of the F. graminearum isolates were the 15-acetyldeoxynivalenol chemotype. Pathogenicity assays showed that both the 3ADON and NIV chemotypes of F. asiaticum could infect wheat and rice spikes. FHB severity and trichothecene toxin analysis revealed that F. asiaticum with the NIV chemotype was less aggressive than that with the 3ADON chemotype in wheat, while the NIV-producing strains were more virulent than the 3ADON-producing strains in rice. F. asiaticum isolates with different chemotypes did not show significant differences in mycelial growth, sporulation, conidial dimensions, or perithecial production. These findings would provide useful information for developing management strategies for the control of FHB in China.
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Affiliation(s)
- Fei Dong
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
| | - Xiao Zhang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Jian Hong Xu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Jian Rong Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
| | - Yin-Won Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Xin Yuan Chen
- College of Marine Life and Fisheries, Jiangsu Ocean University, Lianyungang 222005, China
| | - Yun Peng Li
- Sanquan College of Xinxiang Medical University, Xinxiang 453003, China
| | - Mduduzi P Mokoena
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
| | - Ademola O Olaniran
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
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24
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Liu X, Jiang Y, He D, Fang X, Xu J, Lee YW, Keller NP, Shi J. Copper Tolerance Mediated by FgAceA and FgCrpA in Fusarium graminearum. Front Microbiol 2020; 11:1392. [PMID: 32676062 PMCID: PMC7333239 DOI: 10.3389/fmicb.2020.01392] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 05/29/2020] [Indexed: 01/01/2023] Open
Abstract
All organisms must secure essential trace elements (e.g., Cu) for survival and reproduction. However, excess trace element accumulation in cells is highly toxic. The maintenance of copper (Cu) homeostasis has been extensively studied in mammals, bacteria, and yeast but not in plant pathogens. In this study, we investigated the molecular mechanisms of copper tolerance in Fusarium graminearum, the important wheat head scab fungus. RNA-seq revealed induced expression of the P-type ATPase transporter FgCrpA and metallothionein (MT) FgCrdA after excess Cu treatment. Deletion of FgCrpA but not FgCrdA resulted in reduced tolerance to Cu toxicity. The “Cu fist” transcription factor FgAceA was involved in Cu detoxification through activation of FgCrpA. △FgAceA was more sensitive to copper toxicity than △FgCrpA and overexpression of FgCrpA restored copper tolerance in △FgAceA. FgAceA negatively regulated aurofusarin production and its biosynthetic gene expression. △FgCrpA and △FgAceA were reduced in virulence in flowering wheat heads and synthesized decreased amounts of the mycotoxin deoxynivalenol when challenged with excess Cu. Taken together, these results suggest that mediation of Cu tolerance in F. graminearum mainly relies on the Cu efflux pump and that FgAceA governs Cu detoxification through activation of FgCrpA.
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Affiliation(s)
- Xin Liu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, United States.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Yichen Jiang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,College of Food Science, Tibet Agriculture and Animal Husbandry University, Nyingchi, China
| | - Dan He
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Xin Fang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Jianhong Xu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Yin-Won Lee
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,School of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| | - Nancy P Keller
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, United States.,Department of Bacteriology, University of Wisconsin-Madison, Madison, WI, United States
| | - Jianrong Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
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25
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Dong F, Xing Y, Lee Y, Mokoena M, Olaniran A, Xu J, Shi J. Occurrence of Fusarium mycotoxins and toxigenic Fusarium species in freshly harvested rice in Jiangsu, China. WORLD MYCOTOXIN J 2020. [DOI: 10.3920/wmj2019.2477] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In 2017, 236 rice samples were collected from 42 counties in Jiangsu province, China, and analysed for Fusarium mycotoxins. Mycotoxin analyses showed that deoxynivalenol (DON), 3-acetyldeoxynivalenol (3-ADON), 15-acetyldeoxynivalenol (15-ADON), nivalenol (NIV), fusarenone X (FUS-X), zearalenone (ZEA), fumonisins (including FB1, FB2, and FB3), and beauvericin (BEA) were present in unhusked rice samples. Regional differences in mycotoxin contamination of unhusked rice were attributed to differences in precipitation during rice anthesis and agricultural practices among the three study regions. Importantly, the mean concentrations of DON, NIV, ZEA, and fumonisins in white rice were significantly lower than those in unhusked rice, and the relative proportion of the toxins in rice by-products exceeded 84%. Fusarium isolates were then obtained from the unhusked rice samples; Fusarium asiaticum was the most common, followed by Fusarium fujikuroi, Fusarium proliferatum, Fusarium verticillioides, and Fusarium commune. Genotype and chemical analyses of mycotoxins showed that most F. asiaticum isolates (71%) were 3-ADON chemotypes; the remainder were NIV producers. All of the F. proliferatum and F. verticillioides isolates, and most of the F. fujikuroi isolates produce fumonisins, and most of the three species coproduced BEA. The present study is the first to evaluate Fusarium mycotoxins and toxigenic Fusarium species from rice freshly harvested in Jiangsu province, China. The results of this study improve our understanding the population dynamics of Fusarium species in rice and the development of effective control measures.
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Affiliation(s)
- F. Dong
- Jiangsu Key Laboratory for Food Quality and Safety/State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural
- School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, South Africa
| | - Y.J. Xing
- Jiangsu Key Laboratory for Food Quality and Safety/State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural
| | - Y.W. Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - M.P. Mokoena
- School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, South Africa
| | - A.O. Olaniran
- School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, South Africa
| | - J.H. Xu
- Jiangsu Key Laboratory for Food Quality and Safety/State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China P.R
| | - J.R. Shi
- Jiangsu Key Laboratory for Food Quality and Safety/State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural
- School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, South Africa
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China P.R
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26
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Zhang C, Ren X, Wang X, Wan Q, Ding K, Chen L. FgRad50 Regulates Fungal Development, Pathogenicity, Cell Wall Integrity and the DNA Damage Response in Fusarium graminearum. Front Microbiol 2020; 10:2970. [PMID: 31998262 PMCID: PMC6962240 DOI: 10.3389/fmicb.2019.02970] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 12/09/2019] [Indexed: 12/26/2022] Open
Abstract
Rad50 is a member of the double strand break repair epistasis group of proteins that play important roles in regulating DNA damage checkpoint signaling, telomere maintenance, homologous recombination and non-homologous end-joining in eukaryotes. However, the function of Rad50 in fungal plant pathogens remains unknown. In this study, we report the functional investigation of FgRad50 in the wheat head blight pathogen Fusarium graminearum. FgRad50 is an ortholog of Saccharomyces cerevisiae Rad50 that could restore the sensitivity of the yeast Rad50 mutant to DNA damage agents. The FgRad50 deletion mutant (ΔFgRad50) exhibited defective vegetative growth, asexual/sexual development and virulence, as well as disrupted deoxynivalenol biosynthesis. Moreover, deletion of FgRad50 resulted in hypersensitivity to DNA damage agents. Unexpectedly, FgRad50 plays a key role in responses to cell wall-damaging agents by negatively regulating phosphorylation of FgMgv1, a MAP kinase in the cell wall integrity (CWI) pathway. Taken together, these results suggest that FgRad50 plays critical roles in fungal development, virulence and secondary metabolism in F. graminearum, as well as CWI and the DNA damage response.
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Affiliation(s)
- Chengqi Zhang
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Xuexiang Ren
- Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Xintong Wang
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Qiong Wan
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Kejian Ding
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Li Chen
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, College of Plant Protection, Anhui Agricultural University, Hefei, China
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Wang Y, Wang G, Dai Y, Wang Y, Lee YW, Shi J, Xu J. Biodegradation of Deoxynivalenol by a Novel Microbial Consortium. Front Microbiol 2020; 10:2964. [PMID: 31969870 PMCID: PMC6960266 DOI: 10.3389/fmicb.2019.02964] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Accepted: 12/09/2019] [Indexed: 12/27/2022] Open
Abstract
Deoxynivalenol (DON), a common mycotoxin of type B trichothecene, is produced mainly by several Fusarium species. DON causes great losses in farming and poses severe safety risks to human and animal health. Thus, DON contamination in cereals and DON toxicity are of worldwide concern. In this study, we screened the bacterial consortium C20, which efficiently degraded almost 70 μg ml−1 DON within 5 days. The bacterial consortium also had the ability to degrade 15-acetyl-DON, 3-acetyl-DON, and T-2 toxin. The bacterial consortium C20 was able to degrade DON under a wide range of pH and temperature conditions. The optimal temperature and pH for DON degradation were 30°C and pH 8.0, respectively. The bacterial consortium C20 comprised of different bacterial genera, and several strains were found to significantly increase when cultured in Mineral Medium with 100 μg ml−1 DON based on the analysis of the sequences of the hypervariable V3-V4 region of the 16S rRNA gene. 3-keto-DON was confirmed as a degradation product of DON by liquid chromatography/time-of-flight/mass spectrometry (LC-TOF-MS) and nuclear magnetic resonance (NMR) analyses. The results indicated that the bacterial consortium C20 is a potential candidate for the biodegradation of DON in a safe and environmentally friendly manner.
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Affiliation(s)
- Yanxia Wang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, China.,Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Key Laboratory for Agro-Product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Modern Grain Circulation and Safety, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Gang Wang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Key Laboratory for Agro-Product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Modern Grain Circulation and Safety, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Yijun Dai
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, China
| | - Yu Wang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, China.,Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Key Laboratory for Agro-Product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Modern Grain Circulation and Safety, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Yin-Won Lee
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Key Laboratory for Agro-Product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Modern Grain Circulation and Safety, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| | - Jianrong Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Key Laboratory for Agro-Product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Modern Grain Circulation and Safety, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Jianhong Xu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Key Laboratory for Agro-Product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Modern Grain Circulation and Safety, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China.,School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
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Wang L, Zhang L, Liu C, Sun S, Liu A, Liang Y, Yu J. The roles of FgPEX2 and FgPEX12 in virulence and lipid metabolism in Fusarium graminearum. Fungal Genet Biol 2019; 135:103288. [PMID: 31704369 DOI: 10.1016/j.fgb.2019.103288] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 09/19/2019] [Accepted: 10/29/2019] [Indexed: 12/12/2022]
Abstract
Fusarium head blight (FHB) is a wheat disease with a worldwide prevalence, caused by Fusarium graminearum. Peroxisomes are ubiquitous in eukaryotic cells and are involved in various biochemical phenomena. FgPEX2 and FgPEX12 encode RING-finger peroxins PEX2 and PEX12 in F. graminearum. This study aimed to functionally characterize FgPEX2 and FgPEX12 in F. graminearum. We constructed deletion mutants of FgPEX2 and FgPEX12 via homologous recombination. The ΔPEX2 and ΔPEX12 mutants displayed defects in sexual and asexual development, virulence, cell wall integrity (CWI), and lipid metabolism. Deletion of FgPEX2 and FgPEX12 significantly decreased deoxynivalenol production. Furthermore, fluorescence microscopic analysis of the subcellular localization of GFP-PMP70 and GFP-HEX1 revealed that FgPEX2 and FgPEX12 maintain Woronin bodies. These results show that FgPEX2 and FgPEX12 are required for growth, conidiation, virulence, cell wall integrity, and lipid metabolism in F. graminearum and do not influence their peroxisomes.
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Affiliation(s)
- Lina Wang
- Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Li Zhang
- Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Chunjie Liu
- Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Shaohua Sun
- Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Aixin Liu
- Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Yuancun Liang
- Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Jinfeng Yu
- Key Laboratory of Agricultural Microbiology, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China.
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Liu X, Jiang Y, Zhang Y, Yu M, Jiang H, Xu J, Shi J. FgIlv3a is crucial in branched-chain amino acid biosynthesis, vegetative differentiation, and virulence in Fusarium graminearum. J Microbiol 2019; 57:694-703. [PMID: 31079334 DOI: 10.1007/s12275-019-9123-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 03/25/2019] [Accepted: 03/27/2019] [Indexed: 12/22/2022]
Abstract
Dihydroxyacid dehydratase (DHAD), encoded by ILV3, catalyses the third step in the biosynthetic pathway of branched-chain amino acids (BCAAs), which include isoleucine (Ile), leucine (Leu), and valine (Val). Enzymes involved in BCAA biosynthesis exist in bacteria, plants, and fungi but not in mammals and are therefore attractive targets for antimicrobial or herbicide development. In this study, three paralogous ILV3 genes (FgILV3A, FgILV3B, and FgILV3C) were identified in the genome of Fusarium graminearum, the causal agent of Fusarium head blight (FHB). Deletion of FgILV3A alone or combined with FgILV3B or FgILV3C indicated an important role for FgILV3A in BCAA biosynthesis. FgILV3A deletion mutants lost the ability to grow on medium lacking amino acids. Exogenous supplementation of 1 mM Ile and Val rescued the auxotrophy of ΔFgIlv3A, though 5 mM was required to recover the growth defects in ΔFgIlv3AB and ΔFgIlv3AC strains, indicating that FgIlv3b and FgIlv3c exhibit redundant but accessory roles with FgIlv3a in BCAA biosynthesis. The auxotrophy of ΔFgIlv3A resulted in pleiotropic defects in aerial hyphal growth, in conidial formation and germination, and in aurofusarin accumulation. In addition, the mutants showed reduced virulence and deoxynivalenol production. Overall, our study demonstrates that FgIlv3a is crucial for BCAA biosynthesis in F. graminearum and a candidate fungicide target for FHB management.
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Affiliation(s)
- Xin Liu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, P. R. China.,School of Food and Biological Engineering, Jiangsu Univeristy, Zhenjiang, 212013, Jiangsu, P. R. China
| | - Yichen Jiang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, P. R. China.,College of Food Science, Tibet Agriculture and Animal Husbandry University, Linzhi, 860000, Tibet, P. R. China
| | - Yinghui Zhang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, P. R. China.,College of Life Science, Sanquan College of Xinxiang Medical University, Xinxiang, 453003, Henan, P. R. China
| | - Mingzheng Yu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, P. R. China
| | - Hongjun Jiang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, P. R. China.,College of Plant Protection, Nanjing Agriculture University, Nanjing, 210095, Jiangsu, P. R. China
| | - Jianhong Xu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, P. R. China.,School of Food and Biological Engineering, Jiangsu Univeristy, Zhenjiang, 212013, Jiangsu, P. R. China
| | - Jianrong Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, P. R. China. .,School of Food and Biological Engineering, Jiangsu Univeristy, Zhenjiang, 212013, Jiangsu, P. R. China.
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Biodegradation of deoxynivalenol and its derivatives by Devosia insulae A16. Food Chem 2019; 276:436-442. [DOI: 10.1016/j.foodchem.2018.10.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 09/15/2018] [Accepted: 10/02/2018] [Indexed: 11/21/2022]
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Mishra S, Srivastava S, Dewangan J, Divakar A, Kumar Rath S. Global occurrence of deoxynivalenol in food commodities and exposure risk assessment in humans in the last decade: a survey. Crit Rev Food Sci Nutr 2019; 60:1346-1374. [DOI: 10.1080/10408398.2019.1571479] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Sakshi Mishra
- Genotoxicity Laboratory, Division of Toxicology and Experimental Medicine, Central Drug Research Institute (CSIR-CDRI), Lucknow, Uttar Pradesh, India
| | - Sonal Srivastava
- Genotoxicity Laboratory, Division of Toxicology and Experimental Medicine, Central Drug Research Institute (CSIR-CDRI), Lucknow, Uttar Pradesh, India
| | - Jayant Dewangan
- Genotoxicity Laboratory, Division of Toxicology and Experimental Medicine, Central Drug Research Institute (CSIR-CDRI), Lucknow, Uttar Pradesh, India
| | - Aman Divakar
- Genotoxicity Laboratory, Division of Toxicology and Experimental Medicine, Central Drug Research Institute (CSIR-CDRI), Lucknow, Uttar Pradesh, India
| | - Srikanta Kumar Rath
- Genotoxicity Laboratory, Division of Toxicology and Experimental Medicine, Central Drug Research Institute (CSIR-CDRI), Lucknow, Uttar Pradesh, India
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Xu W, Han X, Li F. Co-occurrence of multi-mycotoxins in wheat grains harvested in Anhui province, China. Food Control 2019. [DOI: 10.1016/j.foodcont.2018.09.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Lu X, Luo C, Xing J, Han Z, Li T, Wu W, Xu H, Zhan R, Chen W. Optimization of Storage Conditions of the Medicinal Herb Ilex asprella against the Sterigmatocystin Producer Aspergillus versicolor Using Response Surface Methodology. Toxins (Basel) 2018; 10:toxins10120499. [PMID: 30486344 PMCID: PMC6316290 DOI: 10.3390/toxins10120499] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 11/19/2018] [Accepted: 11/20/2018] [Indexed: 11/16/2022] Open
Abstract
The root of Ilex asprella is a commonly used herb in Southern China, and also constitutes the main raw material of Canton herbal tea. I. asprella is readily contaminated by mildew because of rich nutrients. Aspergillus versicolor producing sterigmatocystin is one of the most common molds that contaminate foodstuffs and medicinal herbs. Previous study on the evaluation of fungal contamination on samples of I. asprella revealed that A. versicolor was the dominant contaminant. In this study, experiments based on response surface methodology combined with central composite design were carried out to determine the optimal storage conditions of I. asprella to minimize the contamination of sterigmatocystin. The herb, manually innoculated with A. versicolor, was stored under different temperatures (20⁻40 °C) and humidity (80⁻95%) for seven days. The effects of temperature and humidity were evaluated using total saponin, polysaccharide and the sterigmatocystin levels as quality indexes. The results showed that A. versicolor grew quickly and produced large amounts of sterigmatocystin on I. asprella, at humidity ranging from 85% to 90% and temperatures above 26 °C. Meanwhile, total saponin and polysaccharide amounts were reduced significantly. These findings suggested that I. asprella samples should be stored in an environment with humidity and temperature below 85% and 26 °C, respectively, to reduce A. versicolor growth and sterigmatocystin production.
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Affiliation(s)
- Xiaofang Lu
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
- Ministry of Education Key Laboratory of Chinese Medicinal Resource from Lingnan, Guangzhou 510006, China.
- Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, Guangzhou 510006, China.
| | - Chaoquan Luo
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
- Ministry of Education Key Laboratory of Chinese Medicinal Resource from Lingnan, Guangzhou 510006, China.
- Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, Guangzhou 510006, China.
| | - Jianyong Xing
- China Resources Sanjiu Medical & Pharmaceutical Co, Ltd., Shenzhen 518110, China.
| | - Zhengzhou Han
- China Resources Sanjiu Medical & Pharmaceutical Co, Ltd., Shenzhen 518110, China.
| | - Tong Li
- School Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Weiwei Wu
- School Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Hui Xu
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
- Ministry of Education Key Laboratory of Chinese Medicinal Resource from Lingnan, Guangzhou 510006, China.
- Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, Guangzhou 510006, China.
| | - Ruoting Zhan
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
- Ministry of Education Key Laboratory of Chinese Medicinal Resource from Lingnan, Guangzhou 510006, China.
- Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, Guangzhou 510006, China.
| | - Weiwen Chen
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
- Ministry of Education Key Laboratory of Chinese Medicinal Resource from Lingnan, Guangzhou 510006, China.
- Joint Laboratory of National Engineering Research Center for the Pharmaceutics of Traditional Chinese Medicines, Guangzhou 510006, China.
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Chen Y, Zheng S, Ju Z, Zhang C, Tang G, Wang J, Wen Z, Chen W, Ma Z. Contribution of peroxisomal docking machinery to mycotoxin biosynthesis, pathogenicity and pexophagy in the plant pathogenic fungusFusarium graminearum. Environ Microbiol 2018; 20:3224-3245. [DOI: 10.1111/1462-2920.14291] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 05/17/2018] [Accepted: 05/19/2018] [Indexed: 01/07/2023]
Affiliation(s)
- Yun Chen
- State Key Laboratory of Rice Biology; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
- Institute of Biotechnology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
| | - Shiyu Zheng
- State Key Laboratory of Rice Biology; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
- Institute of Biotechnology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
| | - Zhenzhen Ju
- State Key Laboratory of Rice Biology; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
- Institute of Biotechnology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
| | - Chengqi Zhang
- State Key Laboratory of Rice Biology; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
| | - Guangfei Tang
- State Key Laboratory of Rice Biology; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
- Institute of Biotechnology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
| | - Jing Wang
- State Key Laboratory of Rice Biology; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
- Institute of Biotechnology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
| | - Ziyue Wen
- State Key Laboratory of Rice Biology; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
- Institute of Biotechnology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
| | - Wei Chen
- State Key Laboratory of Rice Biology; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
| | - Zhonghua Ma
- State Key Laboratory of Rice Biology; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
- Institute of Biotechnology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects; Zhejiang University; 866 Yuhangtang Road, Hangzhou 310058 China
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35
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Tang G, Zhang C, Ju Z, Zheng S, Wen Z, Xu S, Chen Y, Ma Z. The mitochondrial membrane protein FgLetm1 regulates mitochondrial integrity, production of endogenous reactive oxygen species and mycotoxin biosynthesis in Fusarium graminearum. MOLECULAR PLANT PATHOLOGY 2018; 19:1595-1611. [PMID: 29077257 PMCID: PMC6637989 DOI: 10.1111/mpp.12633] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 10/10/2017] [Accepted: 10/23/2017] [Indexed: 05/14/2023]
Abstract
Deoxynivalenol (DON) is a mycotoxin produced in cereal crops infected with Fusarium graminearum. DON poses a serious threat to human and animal health, and is a critical virulence factor. Various environmental factors, including reactive oxygen species (ROS), have been shown to interfere with DON biosynthesis in this pathogen. The regulatory mechanisms of how ROS trigger DON production have been investigated extensively in F. graminearum. However, the role of the endogenous ROS-generating system in DON biosynthesis is largely unknown. In this study, we genetically analysed the function of leucine zipper-EF-hand-containing transmembrane 1 (LETM1) superfamily proteins and evaluated the role of the mitochondrial-produced ROS in DON biosynthesis. Our results show that there are two Letm1 orthologues, FgLetm1 and FgLetm2, in F. graminearum. FgLetm1 is localized to the mitochondria and is essential for mitochondrial integrity, whereas FgLetm2 plays a minor role in the maintenance of mitochondrial integrity. The ΔFgLetm1 mutant demonstrated a vegetative growth defect, abnormal conidia and increased sensitivity to various stress agents. More importantly, the ΔFgLetm1 mutant showed significantly reduced levels of endogenous ROS, decreased DON biosynthesis and attenuated virulence in planta. To our knowledge, this is the first report showing that mitochondrial integrity and endogenous ROS production by mitochondria are important for DON production and virulence in Fusarium species.
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Affiliation(s)
- Guangfei Tang
- Institute of BiotechnologyZhejiang UniversityHangzhou 310058China
| | - Chengqi Zhang
- Institute of BiotechnologyZhejiang UniversityHangzhou 310058China
- College of Plant ProtectionAnhui Agricultural UniversityHefei 230036China
| | - Zhenzhen Ju
- Institute of BiotechnologyZhejiang UniversityHangzhou 310058China
| | - Shiyu Zheng
- Institute of BiotechnologyZhejiang UniversityHangzhou 310058China
| | - Ziyue Wen
- Institute of BiotechnologyZhejiang UniversityHangzhou 310058China
| | - Sunde Xu
- Institute of BiotechnologyZhejiang UniversityHangzhou 310058China
| | - Yun Chen
- Institute of BiotechnologyZhejiang UniversityHangzhou 310058China
| | - Zhonghua Ma
- Institute of BiotechnologyZhejiang UniversityHangzhou 310058China
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Tang G, Chen Y, Xu JR, Kistler HC, Ma Z. The fungal myosin I is essential for Fusarium toxisome formation. PLoS Pathog 2018; 14:e1006827. [PMID: 29357387 PMCID: PMC5794197 DOI: 10.1371/journal.ppat.1006827] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 02/01/2018] [Accepted: 12/18/2017] [Indexed: 01/12/2023] Open
Abstract
Myosin-I molecular motors are proposed to function as linkers between membranes and the actin cytoskeleton in several cellular processes, but their role in the biosynthesis of fungal secondary metabolites remain elusive. Here, we found that the myosin I of Fusarium graminearum (FgMyo1), the causal agent of Fusarium head blight, plays critical roles in mycotoxin biosynthesis. Inhibition of myosin I by the small molecule phenamacril leads to marked reduction in deoxynivalenol (DON) biosynthesis. FgMyo1 also governs translation of the DON biosynthetic enzyme Tri1 by interacting with the ribosome-associated protein FgAsc1. Disruption of the ATPase activity of FgMyo1 either by the mutation E420K, down-regulation of FgMyo1 expression or deletion of FgAsc1 results in reduced Tri1 translation. The DON biosynthetic enzymes Tri1 and Tri4 are mainly localized to subcellular structures known as toxisomes in response to mycotoxin induction and the FgMyo1-interacting protein, actin, participates in toxisome formation. The actin polymerization disruptor latrunculin A inhibits toxisome assembly. Consistent with this observation, deletion of the actin-associated proteins FgPrk1 and FgEnd3 also results in reduced toxisome formation. Unexpectedly, the FgMyo1-actin cytoskeleton is not involved in biosynthesis of another secondary metabolite tested. Taken together, this study uncovers a novel function of myosin I in regulating mycotoxin biosynthesis in filamentous fungi. The mycotoxin deoxynivalenol (DON) is the most frequently detected secondary metabolite produced by Fusarium graminearum and other Fusarium spp. To date, relatively few studies have addressed how mycotoxin biosynthesis occurs in fungal cells. Here we found that myosin I governs translation of DON biosynthetic enzyme Tri1 via interacting with the ribosome-associated protein FgAsc1. Moreover, the key DON biosynthetic enzymes Tri1 and Tri4 are mainly localized to the toxisomes derived from endoplasmic reticulum under toxin inducing conditions. We further found that the FgMyo1-actin cytoskeleton was involved in toxisome formation but not for the biosynthesis of another secondary metabolite tested. Taken together, these results indicate for the first time that myosin I plays critical roles in mycotoxin biosynthesis.
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Affiliation(s)
- Guangfei Tang
- Institute of Biotechnology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou, China
| | - Yun Chen
- Institute of Biotechnology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou, China
| | - Jin-Rong Xu
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana, United States of America
| | - H. Corby Kistler
- Department of Plant Pathology, University of Minnesota, St. Paul, Minnesota, United States of America
| | - Zhonghua Ma
- Institute of Biotechnology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou, China
- State Key Laboratory of Rice Biology, Zhejiang University, Hangzhou, China
- * E-mail:
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Khan N, Maymon M, Hirsch AM. Combating Fusarium Infection Using Bacillus-Based Antimicrobials. Microorganisms 2017; 5:E75. [PMID: 29165349 PMCID: PMC5748584 DOI: 10.3390/microorganisms5040075] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 01/19/2023] Open
Abstract
Despite efforts to control toxigenic Fusarium species, wilt and head-blight infections are destructive and economically damaging diseases that have global effects. The utilization of biological control agents in disease management programs has provided an effective, safe, and sustainable means to control Fusarium-induced plant diseases. Among the most widely used microbes for biocontrol agents are members of the genus Bacillus. These species influence plant and fungal pathogen interactions by a number of mechanisms such as competing for essential nutrients, antagonizing pathogens by producing fungitoxic metabolites, or inducing systemic resistance in plants. The multivariate interactions among plant-biocontrol agent-pathogen are the subject of this study, in which we survey the advances made regarding the research on the Bacillus-Fusarium interaction and focus on the principles and mechanisms of action among plant-growth promoting Bacillus species. In particular, we highlight their use in limiting and controlling Fusarium spread and infestations of economically important crops. This knowledge will be useful to define strategies for exploiting this group of beneficial bacteria for use as inoculants by themselves or in combination with other microbes for enhanced crop protection.
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Affiliation(s)
- Noor Khan
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA 90095, USA.
| | - Maskit Maymon
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA 90095, USA.
| | - Ann M Hirsch
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA 90095, USA.
- The Molecular Biology Institute, University of California, Los Angeles, CA 90095, USA.
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Dong F, Wang S, Yu M, Sun Y, Xu J, Shi J. Natural occurrence of deoxynivalenol and deoxynivalenol-3-glucoside in various wheat cultivars grown in Jiangsu province, China. WORLD MYCOTOXIN J 2017. [DOI: 10.3920/wmj2016.2158] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Deoxynivalenol (DON) is a major mycotoxin found in wheat infected with Fusarium fungi. DON can be converted by plant detoxification into a form of ‘masked mycotoxin’ termed deoxynivalenol-3-glucoside (DON-3G). To recommend appropriate wheat cultivars for planting in order to reduce DON contamination in Jiangsu province, where a traditional Fusarium head blight (FHB) epidemic area is located in the lower reaches of Yangtze-Huaihe, we evaluated the capacity of various wheat cultivars to transform DON into DON-3G under field conditions. We collected and evaluated samples from 11 major wheat cultivars grown in 63 experimental stations in Jiangsu province in 2015 and 2016. All samples were contaminated with DON, with an average concentration of 2,087±112 and 2,601±126 µg/kg in 2015 and 2016, respectively. DON-3G was detected in 425 (96%) and 405 (97%) samples in 2015 and 2016, with an average concentration of 545±28 and 819±44 µg/kg, respectively. The DON-3G/DON ratio ranged from 5 to 84% (average, 30%) in 2015 and from 0 to 71% (average, 31%) in 2016. DON levels were highly correlated with DON-3G concentrations (P<0.01), and the FHB resistance of the wheat cultivars was proportional to their capacity to convert DON to DON-3G. Importantly, region, cultivar, and region × cultivar interaction all significantly affected DON and DON-3G concentrations and DON-3G/DON ratios. In general, FHB-resistant cultivars, such as Sumai 188 and Ningmai 13, had lower levels of DON and DON-3G than the others. However, additional factors, including the growing region and environmental variables, were important for wheat management when other wheat cultivars were evaluated.
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Affiliation(s)
- F. Dong
- Institute of Food Quality and Safety, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China P.R
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China P.R
- Key Laboratory of Control Technology and Standard for Agro-Product Quality and Safety, Ministry of Agriculture, Nanjing 210014, China P.R
- Key Laboratory of Agro-Product Safety Risk Evaluation, Ministry of Agriculture, Nanjing 210014, China P.R
- Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing 210014, China P.R
| | - S. Wang
- Institute of Food Quality and Safety, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China P.R
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China P.R
- Key Laboratory of Control Technology and Standard for Agro-Product Quality and Safety, Ministry of Agriculture, Nanjing 210014, China P.R
- Key Laboratory of Agro-Product Safety Risk Evaluation, Ministry of Agriculture, Nanjing 210014, China P.R
- Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing 210014, China P.R
| | - M. Yu
- Institute of Food Quality and Safety, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China P.R
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China P.R
- Key Laboratory of Control Technology and Standard for Agro-Product Quality and Safety, Ministry of Agriculture, Nanjing 210014, China P.R
- Key Laboratory of Agro-Product Safety Risk Evaluation, Ministry of Agriculture, Nanjing 210014, China P.R
- Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing 210014, China P.R
| | - Y. Sun
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China P.R
| | - J. Xu
- Institute of Food Quality and Safety, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China P.R
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China P.R
- Key Laboratory of Control Technology and Standard for Agro-Product Quality and Safety, Ministry of Agriculture, Nanjing 210014, China P.R
- Key Laboratory of Agro-Product Safety Risk Evaluation, Ministry of Agriculture, Nanjing 210014, China P.R
- Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing 210014, China P.R
| | - J. Shi
- Institute of Food Quality and Safety, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China P.R
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China P.R
- Key Laboratory of Control Technology and Standard for Agro-Product Quality and Safety, Ministry of Agriculture, Nanjing 210014, China P.R
- Key Laboratory of Agro-Product Safety Risk Evaluation, Ministry of Agriculture, Nanjing 210014, China P.R
- Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing 210014, China P.R
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Wu L, Qiu L, Zhang H, Sun J, Hu X, Wang B. Optimization for the Production of Deoxynivalenoland Zearalenone by Fusarium graminearum UsingResponse Surface Methodology. Toxins (Basel) 2017; 9:toxins9020057. [PMID: 28208576 PMCID: PMC5331436 DOI: 10.3390/toxins9020057] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 01/26/2017] [Accepted: 02/04/2017] [Indexed: 11/16/2022] Open
Abstract
Fusarium mycotoxins deoxynivalenol (DON) and zearalenone (ZEN) are the most common contaminants in cereals worldwide, causing a wide range of adverse health effects on animals and humans. Many environmental factors can affect the production of these mycotoxins. Here, we have used response surface methodology (RSM) to optimize the Fusarium graminearum strain 29 culture conditions for maximal toxin production. Three factors, medium pH, incubation temperature and time, were optimized using a Box-Behnken design (BBD). The optimized conditions for DON production were pH 4.91 and an incubation temperature of 23.75 °C for 28 days, while maximal ZEN production required pH 9.00 and an incubation temperature of 15.05 °C for 28 days. The maximum levels of DON and ZEN production were 2811.17 ng/mL and 23789.70 ng/mL, respectively. Considering the total level of DON and ZEN, desirable yields of the mycotoxins were still obtained with medium pH of 6.86, an incubation temperature of 17.76 °C and a time of 28 days. The corresponding experimental values, from the validation experiments, fitted well with these predictions. This suggests that RSM could be used to optimize Fusarium mycotoxin levels, which are further purified for use as potential mycotoxin standards. Furthermore, it shows that acidic pH is a determinant for DON production, while an alkaline environment and lower temperature (approximately 15 °C) are favorable for ZEN accumulation. After extraction, separation and purification processes, the isolated mycotoxins were obtained through a simple purification process, with desirable yields, and acceptable purity. The mycotoxins could be used as potential analytical standards or chemical reagents for routine analysis.
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Affiliation(s)
- Li Wu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, No.12 Zhongguancun South St., Haidian District, Beijing 100081, China.
- Laboratory of Quality and Safety Risk Assessment for Cereal Products (Beijing), Ministry of Agriculture, Beijing 100081, China.
| | - Lijuan Qiu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, No.12 Zhongguancun South St., Haidian District, Beijing 100081, China.
| | - Huijie Zhang
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, No.12 Zhongguancun South St., Haidian District, Beijing 100081, China.
- Laboratory of Quality and Safety Risk Assessment for Cereal Products (Beijing), Ministry of Agriculture, Beijing 100081, China.
| | - Juan Sun
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, No.12 Zhongguancun South St., Haidian District, Beijing 100081, China.
- Laboratory of Quality and Safety Risk Assessment for Cereal Products (Beijing), Ministry of Agriculture, Beijing 100081, China.
| | - Xuexu Hu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, No.12 Zhongguancun South St., Haidian District, Beijing 100081, China.
- Laboratory of Quality and Safety Risk Assessment for Cereal Products (Beijing), Ministry of Agriculture, Beijing 100081, China.
| | - Bujun Wang
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, No.12 Zhongguancun South St., Haidian District, Beijing 100081, China.
- Laboratory of Quality and Safety Risk Assessment for Cereal Products (Beijing), Ministry of Agriculture, Beijing 100081, China.
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