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Wohlgemuth F, Gomes RL, Singleton I, Rawson FJ, Avery SV. Top-Down Characterization of an Antimicrobial Sanitizer, Leading From Quenchers of Efficacy to Mode of Action. Front Microbiol 2020; 11:575157. [PMID: 33101251 PMCID: PMC7546784 DOI: 10.3389/fmicb.2020.575157] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 09/07/2020] [Indexed: 01/29/2023] Open
Abstract
We developed a top-down strategy to characterize an antimicrobial, oxidizing sanitizer, which has diverse proposed applications including surface-sanitization of fresh foods, and with benefits for water resilience. The strategy involved finding quenchers of antimicrobial activity then antimicrobial mode of action, by identifying key chemical reaction partners starting from complex matrices, narrowing down reactivity to specific organic molecules within cells. The sanitizer electrolyzed-water (EW) retained partial fungicidal activity against the food-spoilage fungus Aspergillus niger at high levels of added soils (30–750 mg mL–1), commonly associated with harvested produce. Soil with high organic load (98 mg g–1) gave stronger EW inactivation. Marked inactivation by a complex organics mix (YEPD medium) was linked to its protein-rich components. Addition of pure proteins or amino acids (≤1 mg mL–1) fully suppressed EW activity. Mechanism was interrogated further with the yeast model, corroborating marked suppression of EW action by the amino acid methionine. Pre-culture with methionine increased resistance to EW, sodium hypochlorite, or chlorine-free ozonated water. Overexpression of methionine sulfoxide reductases (which reduce oxidized methionine) protected against EW. Fluoroprobe-based analyses indicated that methionine and cysteine inactivate free chlorine species in EW. Intracellular methionine oxidation can disturb cellular FeS-clusters and we showed that EW treatment impairs FeS-enzyme activity. The study establishes the value of a top-down approach for multi-level characterization of sanitizer efficacy and action. The results reveal proteins and amino acids as key quenchers of EW activity and, among the amino acids, the importance of methionine oxidation and FeS-cluster damage for antimicrobial mode-of-action.
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Affiliation(s)
| | - Rachel L Gomes
- Faculty of Engineering, University of Nottingham, Nottingham, United Kingdom
| | - Ian Singleton
- School of Applied Sciences, Edinburgh Napier University, Edinburgh, United Kingdom
| | - Frankie J Rawson
- School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
| | - Simon V Avery
- School of Life Sciences, University of Nottingham, Nottingham, United Kingdom
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Li G, Chen T, Zhang Z, Li B, Tian S. Roles of Aquaporins in Plant-Pathogen Interaction. PLANTS (BASEL, SWITZERLAND) 2020; 9:E1134. [PMID: 32882951 PMCID: PMC7569825 DOI: 10.3390/plants9091134] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/28/2020] [Accepted: 08/30/2020] [Indexed: 12/21/2022]
Abstract
Aquaporins (AQPs) are a class of small, membrane channel proteins present in a wide range of organisms. In addition to water, AQPs can facilitate the efficient and selective flux of various small solutes involved in numerous essential processes across membranes. A growing body of evidence now shows that AQPs are important regulators of plant-pathogen interaction, which ultimately lead to either plant immunity or pathogen pathogenicity. In plants, AQPs can mediate H2O2 transport across plasma membranes (PMs) and contribute to the activation of plant defenses by inducing pathogen-associated molecular pattern (PAMP)-triggered immunity and systemic acquired resistance (SAR), followed by downstream defense reactions. This involves the activation of conserved mitogen-activated protein kinase (MAPK) signaling cascades, the production of callose, the activation of NPR1 and PR genes, as well as the opening and closing of stomata. On the other hand, pathogens utilize aquaporins to mediate reactive oxygen species (ROS) signaling and regulate their normal growth, development, secondary or specialized metabolite production and pathogenicity. This review focuses on the roles of AQPs in plant immunity, pathogenicity, and communications during plant-pathogen interaction.
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Affiliation(s)
- Guangjin Li
- Key Laboratory of Plant Resources, Institute of Botany, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100093, China; (G.L.); (T.C.); (Z.Z.); (B.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tong Chen
- Key Laboratory of Plant Resources, Institute of Botany, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100093, China; (G.L.); (T.C.); (Z.Z.); (B.L.)
| | - Zhanquan Zhang
- Key Laboratory of Plant Resources, Institute of Botany, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100093, China; (G.L.); (T.C.); (Z.Z.); (B.L.)
| | - Boqiang Li
- Key Laboratory of Plant Resources, Institute of Botany, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100093, China; (G.L.); (T.C.); (Z.Z.); (B.L.)
| | - Shiping Tian
- Key Laboratory of Plant Resources, Institute of Botany, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100093, China; (G.L.); (T.C.); (Z.Z.); (B.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
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Li B, Chen Y, Zhang Z, Qin G, Chen T, Tian S. Molecular basis and regulation of pathogenicity and patulin biosynthesis in
Penicillium expansum. Compr Rev Food Sci Food Saf 2020; 19:3416-3438. [DOI: 10.1111/1541-4337.12612] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/26/2020] [Accepted: 07/19/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Boqiang Li
- Key Laboratory of Plant Resources, Institute of Botany, The Innovative Academy of Seed Design Chinese Academy of Sciences Beijing China
- Key Laboratory of Post‐Harvest Handing of Fruits Ministry of Agriculture Beijing China
| | - Yong Chen
- Key Laboratory of Plant Resources, Institute of Botany, The Innovative Academy of Seed Design Chinese Academy of Sciences Beijing China
| | - Zhanquan Zhang
- Key Laboratory of Plant Resources, Institute of Botany, The Innovative Academy of Seed Design Chinese Academy of Sciences Beijing China
| | - Guozheng Qin
- Key Laboratory of Plant Resources, Institute of Botany, The Innovative Academy of Seed Design Chinese Academy of Sciences Beijing China
- Key Laboratory of Post‐Harvest Handing of Fruits Ministry of Agriculture Beijing China
| | - Tong Chen
- Key Laboratory of Plant Resources, Institute of Botany, The Innovative Academy of Seed Design Chinese Academy of Sciences Beijing China
| | - Shiping Tian
- Key Laboratory of Plant Resources, Institute of Botany, The Innovative Academy of Seed Design Chinese Academy of Sciences Beijing China
- Key Laboratory of Post‐Harvest Handing of Fruits Ministry of Agriculture Beijing China
- University of Chinese Academy of Sciences Beijing China
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Li X, Li C, Cheng Y, Hou J, Zhang J, Ge Y. Postharvest Application of Acibenzolar- S-methyl Delays the Senescence of Pear Fruit by Regulating Reactive Oxygen Species and Fatty Acid Metabolism. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:4991-4999. [PMID: 32271567 DOI: 10.1021/acs.jafc.0c01031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This study investigated the changes in enzyme activity and gene expression in reactive oxygen species (ROS) and fatty acid metabolism in Docteur Jules Guyot pears after acibenzolar-S-methyl (ASM) treatment to elucidate the role of ROS and fatty acid metabolism in senescence. The results demonstrated that applying ASM postharvest significantly suppressed H2O2 content and enhanced catalase and superoxide dismutase activities in pears. Ascorbate peroxidase, glutathione reductase, dehydroascorbate reductase, and monodehydroascorbate reductase activities and the reduced glutathione content in pears were also induced by ASM. Postharvest ASM dipping remarkably enhanced PcSOD, PcCAT, PcAPX, and PcDHAR expressions and fatty acid synthetase activity in pears. Postharvest applying ASM significantly decreased malondialdehyde content and lipoxygenase, hydroperoxidelyase, alcohol dehydrogenase, and alcohol acyltransferase activities in pears. ASM distinctly inhibited PcPLD, PcLOX, PcHPL, PcADH, and PcAAT expressions in pears. The findings suggest that postharvest applying ASM could modulate ROS and fatty acid metabolism to delay senescence in pears.
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Affiliation(s)
- Xue Li
- College of Food Science and Technology, Bohai University, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
| | - Canying Li
- College of Food Science and Technology, Bohai University, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
| | - Yuan Cheng
- College of Food Science and Technology, Bohai University, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
| | - Jiabao Hou
- College of Food Science and Technology, Bohai University, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
| | - Junhu Zhang
- College of Food Science and Technology, Bohai University, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
| | - Yonghong Ge
- College of Food Science and Technology, Bohai University, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, No. 19 Keji Road, Jinzhou 121013, People's Republic of China
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The Pattern and Function of DNA Methylation in Fungal Plant Pathogens. Microorganisms 2020; 8:microorganisms8020227. [PMID: 32046339 PMCID: PMC7074731 DOI: 10.3390/microorganisms8020227] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/06/2020] [Accepted: 02/06/2020] [Indexed: 01/05/2023] Open
Abstract
To successfully infect plants and trigger disease, fungal plant pathogens use various strategies that are dependent on characteristics of their biology and genomes. Although pathogenic fungi are different from animals and plants in the genomic heritability, sequence feature, and epigenetic modification, an increasing number of phytopathogenic fungi have been demonstrated to share DNA methyltransferases (MTases) responsible for DNA methylation with animals and plants. Fungal plant pathogens predominantly possess four types of DNA MTase homologs, including DIM-2, DNMT1, DNMT5, and RID. Numerous studies have indicated that DNA methylation in phytopathogenic fungi mainly distributes in transposable elements (TEs), gene promoter regions, and the repetitive DNA sequences. As an important and heritable epigenetic modification, DNA methylation is associated with silencing of gene expression and transposon, and it is responsible for a wide range of biological phenomena in fungi. This review highlights the relevant reports and insights into the important roles of DNA methylation in the modulation of development, pathogenicity, and secondary metabolism of fungal plant pathogens. Recent evidences prove that there are massive links between DNA and histone methylation in fungi, and they commonly regulate fungal development and mycotoxin biosynthesis.
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Pho QH, Losic D, Ostrikov K(K, Tran NN, Hessel V. Perspectives on plasma-assisted synthesis of N-doped nanoparticles as nanopesticides for pest control in crops. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00069h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Green plasma-based technology production of N-doped NPs for a new agri-tech revolution in pest control.
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Affiliation(s)
- Quoc Hue Pho
- School of Chemical Engineering and Advanced Materials
- The University of Adelaide
- Adelaide
- Australia
| | - Dusan Losic
- School of Chemical Engineering and Advanced Materials
- The University of Adelaide
- Adelaide
- Australia
- The ARC Graphene Research Hub
| | - Kostya (Ken) Ostrikov
- School of Chemistry, Physics, and Mechanical Engineering
- Queensland University of Technology
- Brisbane
- Australia
| | - Nam Nghiep Tran
- School of Chemical Engineering and Advanced Materials
- The University of Adelaide
- Adelaide
- Australia
- School of Chemical Engineering
| | - Volker Hessel
- School of Chemical Engineering and Advanced Materials
- The University of Adelaide
- Adelaide
- Australia
- School of Engineering
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Chen C, Cai N, Chen J, Wan C. UHPLC-Q-TOF/MS-Based Metabolomics Approach Reveals the Antifungal Potential of Pinocembroside against Citrus Green Mold Phytopathogen. PLANTS (BASEL, SWITZERLAND) 2019; 9:E17. [PMID: 31877872 PMCID: PMC7020183 DOI: 10.3390/plants9010017] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/16/2019] [Accepted: 12/20/2019] [Indexed: 02/07/2023]
Abstract
Pinocembroside (PiCB) isolated from Ficus hirta Vahl. fruit was studied herein with the aim to find the potential mechanism for significant inhibition of growth of Penicillium digitatum, a causative pathogen of citrus green mold disease. PiCB substantially inhibited mycelial growth of P. digitatum, with the observed half maximal effective concentration (EC50), minimum inhibitory concentration (MIC), and minimum fungicidal concentration (MFC) of 120.3, 200, and 400 mg/L, respectively. Moreover, PiCB altered hyphal morphology and cellular morphology by breaking and shrinking of mycelia, decomposing cell walls, cytoplasmic inclusions. In addition to, a non-targeted metabolomics analysis by UHPLC-Q-TOF/MS was also performed, which revealed that PiCB treatment notably disrupted the metabolisms of amino acids, lipids, fatty acids, TCA, and ribonucleic acids, thereby contributing to membrane peroxidation. Current findings provide a new perception into the antifungal mechanism of PiCB treatment in inhibiting P. digitatum growth through membrane peroxidation.
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Affiliation(s)
- Chuying Chen
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Postharvest Key Technology and Quality Safety of Fruits & Vegetables in Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045, China; (C.C.); (N.C.)
| | - Nan Cai
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Postharvest Key Technology and Quality Safety of Fruits & Vegetables in Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045, China; (C.C.); (N.C.)
| | - Jinyin Chen
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Postharvest Key Technology and Quality Safety of Fruits & Vegetables in Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045, China; (C.C.); (N.C.)
- Pingxiang University, Pingxiang 337055, China
| | - Chunpeng Wan
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits & Vegetables, Collaborative Innovation Center of Postharvest Key Technology and Quality Safety of Fruits & Vegetables in Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045, China; (C.C.); (N.C.)
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