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Zhang M, Li L, Li C, Ma A, Li J, Yang C, Chen X, Cao P, Li S, Zhang Y, Yuchi Z, Du X, Liu C, Wang X, Wang X, Xiang W. Natural product guvermectin inhibits guanosine 5'-monophosphate synthetase and confers broad-spectrum antibacterial activity. Int J Biol Macromol 2024; 267:131510. [PMID: 38608989 DOI: 10.1016/j.ijbiomac.2024.131510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 03/27/2024] [Accepted: 04/09/2024] [Indexed: 04/14/2024]
Abstract
Bacterial diseases caused substantial yield losses worldwide, with the rise of antibiotic resistance, there is a critical need for alternative antibacterial compounds. Natural products (NPs) from microorganisms have emerged as promising candidates due to their potential as cost-effective and environmentally friendly bactericides. However, the precise mechanisms underlying the antibacterial activity of many NPs, including Guvermectin (GV), remain poorly understood. Here, we sought to explore how GV interacts with Guanosine 5'-monophosphate synthetase (GMPs), an enzyme crucial in bacterial guanine synthesis. We employed a combination of biochemical and genetic approaches, enzyme activity assays, site-directed mutagenesis, bio-layer interferometry, and molecular docking assays to assess GV's antibacterial activity and its mechanism targeting GMPs. The results showed that GV effectively inhibits GMPs, disrupting bacterial guanine synthesis. This was confirmed through drug-resistant assays and direct enzyme inhibition studies. Bio-layer interferometry assays demonstrated specific binding of GV to GMPs, with dependency on Xanthosine 5'-monophosphate. Site-directed mutagenesis identified key residues crucial for the GV-GMP interaction. This study elucidates the antibacterial mechanism of GV, highlighting its potential as a biocontrol agent in agriculture. These findings contribute to the development of novel antibacterial agents and underscore the importance of exploring natural products for agricultural disease management.
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Affiliation(s)
- Manman Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, Plant Pathology Department, College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Lei Li
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China
| | - Cheng Li
- College of Agriculture, Key Laboratory of Agricultural Microbiology of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Aifang Ma
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Junzhou Li
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Chenyu Yang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xujun Chen
- Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, Plant Pathology Department, College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Peng Cao
- Key Laboratory of Drug Targets and Drug Leads for Degenerative Diseases, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Shanshan Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yanyan Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Zhiguang Yuchi
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Xiangge Du
- Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, Plant Pathology Department, College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Chongxi Liu
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China
| | - Xiangjing Wang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China
| | - Xiaodan Wang
- Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, Plant Pathology Department, College of Plant Protection, China Agricultural University, Beijing 100193, China.
| | - Wensheng Xiang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, China.
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Wang H, Mi Q, Mao Y, Tan Y, Yang M, Liu W, Wang N, Tian X, Huang L. Streptothricin-F Inhibition of FtsZ Function: A Promising Approach for Controlling Pseudomonas syringae pv. actinidiae. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:2624-2633. [PMID: 38277222 DOI: 10.1021/acs.jafc.3c08474] [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: 01/28/2024]
Abstract
Pseudomonas syringae pv. actinidiae (Psa) is a significant pathogenic bacterium affecting the kiwifruit industry. This study investigated the target sites of streptothricin-F (ST-F), produced by Streptomyces lavendulae gCLA4. The inhibition of ST-F on Psa was examined by the microscopic structural differences of Psa before and after treatment with ST-F, as well as the interaction between ST-F and cell division-related proteins. The results revealed filamentation of Psa after ST-F treatment, and fluorescence microscopy showed that ST-F inhibited the formation of the Z-ring composed of FtsZ protein. In vitro experiments and molecular docking demonstrated that ST-F can bind to FtsZ with a binding energy of 0.4 μM and inhibit FtsZ's GTP-dependent polymerization reaction. In addition, ST-F does not exert inhibitory effects on cell division in Psa strains overexpressing ftsZ. In conclusion, FtsZ is one of the target sites for ST-F inhibition of Psa, highlighting its potential as a therapeutic target for controlling Psa-induced kiwifruit bacterial canker.
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Affiliation(s)
- Hua Wang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100 Shaanxi Province, P. R. China
- College of Plant Protection, Northwest A&F University, Yangling Shaanxi Province 712100, P. R. China
| | - Qianqian Mi
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100 Shaanxi Province, P. R. China
- College of Plant Protection, Northwest A&F University, Yangling Shaanxi Province 712100, P. R. China
| | - Yiru Mao
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100 Shaanxi Province, P. R. China
- College of Plant Protection, Northwest A&F University, Yangling Shaanxi Province 712100, P. R. China
| | - Yunxiao Tan
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100 Shaanxi Province, P. R. China
- College of Plant Protection, Northwest A&F University, Yangling Shaanxi Province 712100, P. R. China
| | - Mingming Yang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100 Shaanxi Province, P. R. China
- College of Plant Protection, Northwest A&F University, Yangling Shaanxi Province 712100, P. R. China
| | - Wei Liu
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100 Shaanxi Province, P. R. China
- College of Plant Protection, Northwest A&F University, Yangling Shaanxi Province 712100, P. R. China
| | - Nana Wang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100 Shaanxi Province, P. R. China
- College of Life Science, Northwest A&F University, Yangling Shaanxi Province 712100, P. R. China
| | - Xiangrong Tian
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100 Shaanxi Province, P. R. China
- College of Forestry, Northwest A&F University, Yangling Shaanxi Province 712100, P. R. China
| | - Lili Huang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100 Shaanxi Province, P. R. China
- College of Plant Protection, Northwest A&F University, Yangling Shaanxi Province 712100, P. R. China
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Lan Y, Yan Z, Duan T. Luobuma Leaf Spot Disease Caused by Alternaria tenuissima in China. J Fungi (Basel) 2023; 9:1062. [PMID: 37998868 PMCID: PMC10671953 DOI: 10.3390/jof9111062] [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: 09/27/2023] [Revised: 10/24/2023] [Accepted: 10/26/2023] [Indexed: 11/25/2023] Open
Abstract
Luobuma (Apocynum venetum and Poacynum hendersonni) is widely cultivated for environmental conservation, medicinal purposes and the textile industry. In 2018, a severe leaf spot disease that attacked the leaves of Luobuma was observed in plants cultivated in Yuzhong County, Gansu Province, China. Symptoms of the disease appeared as white or off-white spots surrounded by brown margins on the leaves of A. venetum. The spots expanded and covered a large area of the leaf, presenting as "cankers" with progression of the disease, leading to leaf death. The initial symptoms of the disease on P. hendersonni were similar to the symptoms of A. venetum, with a larger disease spot than A. venetum, and the spot was black and thicker. The aim of this study was to identify the fungal species and evaluate the effectiveness of fungicides (hymexazol and zhongshengmycin) against the pathogen in vitro. The fungi species that caused the new disease was identified as Alternaria tenuissima based on the morphological characteristics, pathogenicity tests, and phylogenetic analysis of the internal transcribed spacer (ITS) region, glyceraldehyde 3-phosphate dehydrogenase (gpd), translation elongation factor 1-alpha (TEF) and the histone 3 (H3) gene sequences. The findings showed that hymexazol fungicide can be used to control leaf spot disease. This is the first report on Luobuma leaf spot disease caused by A. tenuissima in China.
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Affiliation(s)
- Yanru Lan
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, Lanzhou University, Lanzhou 730020, China
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou 730020, China
- College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
| | - Zhichen Yan
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, Lanzhou University, Lanzhou 730020, China
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou 730020, China
- College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
| | - Tingyu Duan
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, Lanzhou University, Lanzhou 730020, China
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou 730020, China
- College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
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Huang H, Li D, Jiang S, Yang R, Yang Y, Xia Z, Jiang X, Zhao Y, Wang D, Song B, Chen Z. Integrated Transcriptome and Proteome Analysis Reveals that the Antimicrobial Griseofulvin Targets Didymella segeticola Beta-Tubulin to Control Tea Leaf Spot. PHYTOPATHOLOGY 2023; 113:194-205. [PMID: 36173282 DOI: 10.1094/phyto-02-22-0061-r] [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: 06/16/2023]
Abstract
Because effective control measures are lacking, tea leaf spot caused by Didymella segeticola results in huge tea (Camellia sinensis) production losses on tea plantations in Guizhou Province, southwestern China. Screening for natural antimicrobial agents with higher control effects against this pathogen and studying their modes of action may contribute to disease management. Here, Penicillium griseofulvum-derived antimicrobial griseofulvin (GSF) can inhibit the hyphal growth of D. segeticola strain GZSQ-4, with a half-maximal effective concentration of 0.37 μg/ml in vitro and a higher curative efficacy at a lower dose of 25 μg/ml for detached tea twigs. GSF induces deformed and slightly curly hyphae with enlarged ends, with protoplasts agglutinated in the hyphae, and higher numbers of hyphal protuberances. GSF alters hyphal morphology and the subcellular structure's order. The integrated transcriptome and proteome data revealed that the transport of materials in cells, cellular movement, and mitosis were modulated by GSF. Molecular docking indicated that beta-tubulin was the most potent target of GSF, with a binding free energy of -13.59 kcal/mol, and microscale thermophoresis indicated that the dissociation constant (Kd) value of GSF binding to beta-tubulin 1, compared with beta-tubulin 2, was significantly lower. Thus, GSF potentially targets beta-tubulin 1 to disturb the chromosomal separation and fungal mitosis, thereby inhibiting hyphal growth.
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Affiliation(s)
- Hongke Huang
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou, P.R. China
- College of Tea Science, Guizhou University, Guiyang, Guizhou, P.R. China
| | - Dongxue Li
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou, P.R. China
| | - Shilong Jiang
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou, P.R. China
- Agricultural College, Guizhou University, Guiyang, Guizhou, P.R. China
| | - Rui Yang
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou, P.R. China
- Agricultural College, Guizhou University, Guiyang, Guizhou, P.R. China
| | - Yuqing Yang
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou, P.R. China
- College of Tea Science, Guizhou University, Guiyang, Guizhou, P.R. China
| | - Zhongqiu Xia
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou, P.R. China
- College of Tea Science, Guizhou University, Guiyang, Guizhou, P.R. China
| | - Xinyue Jiang
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou, P.R. China
| | - Yongtian Zhao
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou, P.R. China
- College of Life Science and Agriculture, Qiannan Normal University for Nationalities, Duyun, Guizhou, P.R. China
| | - Delu Wang
- College of Forestry, Guizhou University, Guiyang, Guizhou, P.R. China
| | - Baoan Song
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou, P.R. China
| | - Zhuo Chen
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou, P.R. China
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Wang Y, Yang Y, Jiang X, Shi J, Yang Y, Jiang S, Li Z, Wang D, Chen Z. The Sequence and Integrated Analysis of Competing Endogenous RNAs Originating from Tea Leaves Infected by the Pathogen of Tea Leaf Spot, Didymella segeticola. PLANT DISEASE 2022; 106:1286-1290. [PMID: 34433319 DOI: 10.1094/pdis-06-21-1324-a] [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: 06/13/2023]
Abstract
Tea leaf spot, caused by Didymella segeticola, is an important disease which negatively affects the productivity and the quality of tea leaves. During infection by the pathogen, competing endogenous RNAs (ceRNAs) from tea leaves could contribute to achieving pathogenicity. In this study, circular RNAs (circRNAs) and long noncoding RNAs (lncRNAs), constituting ceRNAs, which share binding sites on microRNAs (miRNAs), and messenger RNAs (mRNAs) from infected and uninfected leaves of tea (Camellia sinensis 'Fuding-dabaicha') were sequenced and analyzed, and the identity and expression levels of the target genes of miRNA-mRNA and miRNA-lncRNA/circRNA were predicted. Analysis indicated that 10 mRNAs were bound by 20 miRNAs, 66 lncRNAs were bound by 40 miRNAs, and 17 circRNAs were bound by 29 miRNAs, respectively. For the regulation modes of ceRNAs, five ceRNA pairs were identified by the correlation analysis of lncRNA-miRNA-mRNA. For instance, expression of the xyloglucan endotransglycosylase gene in infected leaves was downregulated at the level of mRNA through miRNA PC-5p-3511474_3 binding with lncRNA TEA024202.1:MSTRG.37074.1. Gene annotation indicated that expression of this gene was significantly enriched in cell wall biogenesis and in the pathway of plant hormone signal transduction. The functional analysis of ceRNAs isolated from infected tea leaves will provide a valuable resource for future research on D. segeticola pathogenicity.
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Affiliation(s)
- Yu Wang
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou 550025, China
- Agricultural College, Guizhou University, Guiyang, Guizhou 550025, China
| | - Yuanyou Yang
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou 550025, China
| | - Xinyue Jiang
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou 550025, China
| | - Jiayan Shi
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou 550025, China
| | - Yuqin Yang
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou 550025, China
- College of Tea Science, Guizhou University, Guiyang, Guizhou 550025, China
| | - Shilong Jiang
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou 550025, China
- Agricultural College, Guizhou University, Guiyang, Guizhou 550025, China
| | - Zhong Li
- Agricultural College, Guizhou University, Guiyang, Guizhou 550025, China
| | - Delu Wang
- College of Forestry, Guizhou University, Guiyang, Guizhou 550025, China
| | - Zhuo Chen
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, Guizhou 550025, China
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Exogenous Alanine Reverses the Bacterial Resistance to Zhongshengmycin with the Promotion of the P Cycle in Xanthomonas oryzae. Antibiotics (Basel) 2022; 11:antibiotics11020245. [PMID: 35203847 PMCID: PMC8868265 DOI: 10.3390/antibiotics11020245] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/02/2022] [Accepted: 02/11/2022] [Indexed: 12/10/2022] Open
Abstract
Microbial antibiotic resistance has become a worldwide concern, as it weakens the efficiency of the control of pathogenic microbes in both the fields of medicine and plant protection. A better understanding of antibiotic resistance mechanisms is helpful for the development of efficient approaches to settle this issue. In the present study, GC-MS-based metabolomic analysis was applied to explore the mechanisms of Zhongshengmycin (ZSM) resistance in Xanthomonas oryzae (Xoo), a bacterium that causes serious disease in rice. Our results show that the decline in the pyruvate cycle (the P cycle) was a feature for ZSM resistance in the metabolome of ZSM-resistant strain (Xoo-ZSM), which was further demonstrated as the expression level of genes involved in the P cycle and two enzyme activities were reduced. On the other hand, alanine was considered a crucial metabolite as it was significantly decreased in Xoo-ZSM. Exogenous alanine promoted the P cycle and enhanced the ZSM-mediated killing efficiency in Xoo-ZSM. Our study highlights that the depressed P cycle is a feature in Xoo-ZSM for the first time. Additionally, exogenous alanine is a candidate enhancer and can be applied with ZSM to improve the antibiotic-mediated killing efficiency in the control of infection caused by Xoo.
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Elevation of Fatty Acid Biosynthesis Metabolism Contributes to Zhongshengmycin Resistance in Xanthomonas oryzae. Antibiotics (Basel) 2021; 10:antibiotics10101166. [PMID: 34680747 PMCID: PMC8532796 DOI: 10.3390/antibiotics10101166] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/15/2021] [Accepted: 09/22/2021] [Indexed: 11/16/2022] Open
Abstract
Xanthomonas oryzae severely impacts the yield and quality of rice. Antibiotics are the most common control measure for this pathogen; however, the overuse of antibiotics in past decades has caused bacterial resistance to these antibiotics. The agricultural context is of particular importance as antibiotic-resistant bacteria are prevalent, but the resistance mechanism largely remains unexplored. Herein, using gas chromatography-mass spectrometry (GC-MS), we demonstrated that zhongshengmycin-resistant X. oryzae (Xoo-Rzs) and zhongshengmycin-sensitive X. oryzae (Xoo-S) have distinct metabolic profiles. We found that the resistance to zhongshengmycin (ZS) in X. oryzae is related to increased fatty acid biosynthesis. This was demonstrated by measuring the Acetyl-CoA carboxylase (ACC) activity, the expression levels of enzyme genes involved in the fatty acid biosynthesis and degradation pathways, and adding exogenous materials, i.e., triclosan and fatty acids. Our work provides a basis for the subsequent control of the production of antibiotic-resistant strains of X. oryzae and the development of coping strategies.
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