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Sun J, Wu J, Zhang X, Wei Q, Kang W, Wang F, Liu F, Zhao M, Xu S, Han B. Enantioselective toxicity of the neonicotinoid dinotefuran on honeybee (Apis mellifera) larvae. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 944:174014. [PMID: 38880156 DOI: 10.1016/j.scitotenv.2024.174014] [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: 05/13/2024] [Revised: 06/13/2024] [Accepted: 06/13/2024] [Indexed: 06/18/2024]
Abstract
The threat of neonicotinoids to insect pollinators, particularly honeybees (Apis mellifera), is a global concern, but the risk of chiral neonicotinoids to insect larvae remains poorly understood. In the current study, we evaluated the acute and chronic toxicity of dinotefuran enantiomers to honeybee larvae in vitro and explored the mechanism of toxicity. The results showed that the acute median lethal dose (LD50) of S-dinotefuran to honeybee larvae was 30.0 μg/larva after oral exposure for 72 h, which was more toxic than rac-dinotefuran (92.7 μg/larva) and R-dinotefuran (183.6 μg/larva). Although the acute toxicity of the three forms of dinotefuran to larvae was lower than that to adults, chronic exposure significantly reduced larval survival, larval weight, and weight of newly emerged adults. Analysis of gene expression and hormone titer indicated that dinotefuran affects larval growth and development by interfering with nutrient digestion and absorption and the molting system. Analysis of hemolymph metabolome further revealed that disturbances in the neuroactive ligand-receptor interaction pathway and energy metabolism are the key mechanisms of dinotefuran toxicity to bee larvae. In addition, melatonin and vitellogenin are used by larvae to cope with dinotefuran-induced oxidative stress. Our results contribute to a comprehensive understanding of dinotefuran damage to bees and provide new insights into the mechanism of enantioselective toxicity of insecticides to insect larvae.
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Affiliation(s)
- Jiajing Sun
- State Key Laboratory of Resource Insects, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Modern Agricultural College, Yibin Vocational and Technical College, Yibin 644100, China
| | - Jiangli Wu
- State Key Laboratory of Resource Insects, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xufeng Zhang
- Institute of Horticultural Research, Shanxi Academy of Agricultural Sciences, Shanxi Agricultural University, Taiyuan 030031, China
| | - Qiaohong Wei
- State Key Laboratory of Resource Insects, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Weipeng Kang
- State Key Laboratory of Resource Insects, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Feng Wang
- Institute of Horticultural Research, Shanxi Academy of Agricultural Sciences, Shanxi Agricultural University, Taiyuan 030031, China
| | - Fengying Liu
- State Key Laboratory of Resource Insects, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Meijiao Zhao
- State Key Laboratory of Resource Insects, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Shufa Xu
- State Key Laboratory of Resource Insects, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Bin Han
- State Key Laboratory of Resource Insects, Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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Hao M, Jiang L, Lv M, Ding H, Zhou Y, Xu H. Plant natural product-based pesticides in crop protection: semi-synthesis, mono-crystal structures and agrochemical activities of osthole ester derivatives, and study of their toxicology against Tetranychus cinnabarinus (Boisduval). PEST MANAGEMENT SCIENCE 2024. [PMID: 39118390 DOI: 10.1002/ps.8364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 07/22/2024] [Accepted: 07/25/2024] [Indexed: 08/10/2024]
Abstract
BACKGROUND Owing to large amounts of synthetic pesticides being extensively and unreasonably used for crop protection, currently, resistance and negative impacts on human health and environment safety have appeared. Therefore, development of potential pesticide candidates is highly urgent. Herein, a series of ester derivatives of osthole were designed and synthesized as pesticidal agents. RESULTS Six spatial configurations of 4'-(p-toluenoyloxy)osthole (4b), 4'-(m-fluorobenzoyloxy)osthole (4f), 4'-(p-fluorophenylacetyloxy)osthole (4m), 4'-(3'',4''-methylenedioxybenzoyloxy)osthole (4q), 4'-formyloxyosthole (4u) and 4'-acetyloxyosthole (4v) were determined by X-ray mono-crystal diffraction. Compounds 4b, 4'-(p-chlorobenzoyloxy)osthole (4g), 4'-(m-chlorobenzoyloxy)osthole (4h), 4'-(p-bromobenzoyloxy)osthole (4i) and 4'-(2''-chloropyridin-3''-ylcarbonyloxy)osthole (4p) showed higher insecticidal activity than toosendanin against Mythimna separata Walker; notably, compound 4b displayed 1.8 times insecticidal activity of the precursor osthole. Against Tetranychus cinnabarinus Boisduval, compounds 4g and 4h showed 3.3 and 2.6 times acaricidal activity of osthole, and good control effects in the glasshouse. Scanning electron microscopy assay demonstrated that compound 4g can damage the cuticle layer of T. cinnabarinus resulting in death. CONCLUSION Compounds 4g and 4h can be further studied as lead pesticidal agents for the management of M. separata and T. cinnabarinus. These results will pave the way for application of osthole derivatives as agrochemicals. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Meng Hao
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Linlin Jiang
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Min Lv
- College of Plant Protection, Northwest A&F University, Yangling, China
- School of Marine Sciences, Ningbo University, Ningbo, China
| | - Haixia Ding
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Yimeng Zhou
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Hui Xu
- College of Plant Protection, Northwest A&F University, Yangling, China
- School of Marine Sciences, Ningbo University, Ningbo, China
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Ribeiro VP, Bajsa-Hirschel J, Bastos JK, Reichley A, Duke SO, Meepagala KM. Characterization of the Phytotoxic Potential of Seven Copaifera spp. Essential Oils: Analyzing Active Compounds through Gas Chromatography-Mass Spectrometry Molecular Networking. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 39105735 DOI: 10.1021/acs.jafc.4c04586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
In recent years, there has been a need for environmentally friendly compounds for weed management in agriculture. This study is aimed to assess the phytotoxic constituents of oils obtained from oleoresins of seven Copaifera species (known as copaiba oils). Copaiba oils were separated from the resins by hydro-distillation, and the distillates were analyzed using gas chromatography-mass spectrometry (GC-MS) to characterize their chemical compositions. Multivariate analyses and molecular networking of GC-MS data were conducted to discern patterns in the chemical composition and phytotoxic activity of the oils, with the aim of identifying key compounds associated with phytotoxic activity. Seed germination bioassay revealed strong or complete germination inhibition against the monocot, Agrostis stolonifera but not the dicot Lactuca sativa. GC-MS analysis showed variations in composition among Copaifera species with some common compounds identified across multiple species. Caryophyllene oxide and junenol were associated with the observed phytotoxic effects. Automated flash chromatography was used to isolate the major compounds of the oils. Isolated compounds exhibited differing levels of phytotoxicity compared to the oils, suggesting the importance of interactions or synergism among oil components. These findings highlight the potential of copaiba oils as natural herbicidal agents and underscore the importance of considering species-specific responses in weed management strategies.
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Affiliation(s)
- Victor Pena Ribeiro
- Agricultural Research Service, U.S. Department of Agriculture, Natural Products Utilization Research Unit, University, Mississippi 38677, United States
| | - Joanna Bajsa-Hirschel
- Agricultural Research Service, U.S. Department of Agriculture, Natural Products Utilization Research Unit, University, Mississippi 38677, United States
| | - Jairo Kenupp Bastos
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, SP 14440-903,Brazil
| | - Amber Reichley
- Agricultural Research Service, U.S. Department of Agriculture, Natural Products Utilization Research Unit, University, Mississippi 38677, United States
| | - Stephen O Duke
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, Mississippi 39677, United States
| | - Kumudini M Meepagala
- Agricultural Research Service, U.S. Department of Agriculture, Natural Products Utilization Research Unit, University, Mississippi 38677, United States
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Xu D, Chi Y, He HW, Chen CY, Zhou H, Liu X, Xu G. Structural Simplification of Podophyllotoxin: Discovery of γ-Butyrolactone Derivatives as Novel Antiviral Agents for Plant Protection. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 39106460 DOI: 10.1021/acs.jafc.4c04312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
Natural products are a valuable resource for the discovery of novel crop protection agents. A series of γ-butyrolactone derivatives, derived from the simplification of podophyllotoxin's structure, were synthesized and assessed for their efficacy against tobacco mosaic virus (TMV). Several derivatives exhibited notable antiviral properties, with compound 3g demonstrating the most potent in vivo anti-TMV activity. At 500 μg/mL, compound 3g achieved an inactivation effect of 87.8%, a protective effect of 71.7%, and a curative effect of 67.7%, surpassing the effectiveness of the commercial plant virucides ningnanmycin and ribavirin. Notably, the syn-diastereomer (syn-3g) exhibited superior antiviral activity compared to the anti-diastereomer (anti-3g). Mechanistic studies revealed that syn-3g could bind to the TMV coat protein and interfere with the self-assembly process of TMV particles. These findings indicate that compound 3g, with its simple chemical structure, could be a potential candidate for the development of novel antiviral agents for crop protection.
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Affiliation(s)
- Dan Xu
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yuan Chi
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hong-Wei He
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Institute of Cotton Research, Shanxi Agricultural University, Yuncheng, Shanxi 044000, China
| | - Cai-Yun Chen
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Huan Zhou
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xili Liu
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, Shaanxi 712100, China
| | - Gong Xu
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
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Zhang S, Zhou Z, Wang T, Lu A. Design, Synthesis, and Antifungal Activities of Phenylpyrrole Analogues Based on Alkaloid Lycogalic Acid. Molecules 2024; 29:3150. [PMID: 38999100 PMCID: PMC11243374 DOI: 10.3390/molecules29133150] [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: 06/07/2024] [Revised: 06/26/2024] [Accepted: 06/30/2024] [Indexed: 07/14/2024] Open
Abstract
Plant diseases caused by pathogenic fungi seriously affect the yield and quality of crops, cause huge economic losses, and pose a considerable threat to global food security. Phenylpyrrole analogues were designed and synthesized based on alkaloid lycogalic acid. All target compounds were characterized by 1H NMR, 13C NMR, and HRMS. Their antifungal activities against seven kinds of phytopathogenic fungi were evaluated. The results revealed that most compounds had broad-spectrum fungicidal activities at 50 μg/mL; 14 compounds displayed more than 60% fungicidal activities against Rhizoctonia cerealis and Sclerotinia sclerotiorum, and in particular, the fungicidal activities of compounds 8g and 8h against Rhizoctonia cerealis were more than 90%, which could be further developed as lead agents for water-soluble fungicides. The molecular docking results indicate that compounds 8g and 8h can interact with 14α-demethylase (RcCYP51) through hydrogen bonding with strong affinity.
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Affiliation(s)
- Shuaiheng Zhang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China;
| | - Zhenghong Zhou
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China;
| | - Tienan Wang
- Key Laboratory of Traditional Chinese Medicine Research and Development of Hebei Province, Institute of Traditional Chinese Medicine, Chengde Medical University, Chengde 067000, China
| | - Aidang Lu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China;
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Li Y, Luo Z, Zhou A, Liu W, Fan J, Miao J, Guo B, Tang L, Fan L. Design and synthesis of novel benzoxazole/chromene-phthalide scaffolds hybrids as potential natural products-based fungicide. Nat Prod Res 2024; 38:2441-2446. [PMID: 36762769 DOI: 10.1080/14786419.2023.2177993] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/23/2023] [Accepted: 02/04/2023] [Indexed: 02/11/2023]
Abstract
Phthalide, benzoxazole, and chromene are important heterocyclic skeletons with extensive biological activities. In order to develop novel potential antifungal agents, twenty-two benzoxazole/chromene-containing phthalide derivatives were prepared, and their fungicidal activity against nine common plants pathogenic fungi were evaluated in vitro. The EC50 values indicated that compound Z-4b displayed superior antifungal activity against P. oryzae (11.0 μg/mL), F. solani (8.5 μg/mL), P. capsici (27.8 μg/mL), V. mali (3.1 μg/mL) and A. brassicae (4.3 μg/mL) strains, which was more potent than the two commercialized fungicides hymexazol and chlorothalonil. In addition, the structure-activity relationship analysis demonstrated that the combination site of oxazolamide with phthalide has an important effect on antifungal activity. This research offers a potential compound for the development of novel agricultural fungicides.
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Affiliation(s)
- Yong Li
- College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang, People's Republic of China
| | - Zhongfu Luo
- College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang, People's Republic of China
| | - Akang Zhou
- College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang, People's Republic of China
| | - Wenjing Liu
- College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang, People's Republic of China
| | - Judi Fan
- College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang, People's Republic of China
| | - Jing Miao
- College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang, People's Republic of China
| | - Bing Guo
- College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang, People's Republic of China
| | - Lei Tang
- College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang, People's Republic of China
| | - Lingling Fan
- College of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang, People's Republic of China
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Zhang J, Gao L, Lin H, Liang Y, You M, Ding L, Feng F, Yang B, Liu Y. Discovery of Antibacterial Compounds against Xanthomonas citri subsp. citri from a Marine Fungus Aspergillus terreus SCSIO 41202 and the Mode of Action. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:12596-12606. [PMID: 38771666 DOI: 10.1021/acs.jafc.4c02769] [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: 05/23/2024]
Abstract
Citrus canker, caused by Xanthomonas citri subsp. citri (Xcc), is a severe citrus disease. Currently, copper-containing pesticides are widely used to manage this disease, posing high risks to the environment and human health. This study reports the discovery of naturally occurring anti-Xcc compounds from a deep-sea fungus, Aspergillus terreus SCSIO 41202, and the possible mode of action. The ethyl acetate extract of A. terreus was subjected to bioassay-guided isolation, resulting in the discovery of eight anti-Xcc compounds (1-8) with minimum inhibitory concentrations (MICs) ranging from 0.078 to 0.625 mg/mL. The chemical structures of these eight metabolites were determined by integrative analysis of various spectroscopic data. Among these compounds, Asperporonin A (1) and Asperporonin B (2) were identified as novel compounds with a very unusual structural skeleton. The electronic circular dichroism was used to determine the absolute configurations of 1 and 2 through quantum chemical calculation. A bioconversion pathway involving pinacol rearrangement was proposed to produce the unusual compounds (1-2). Compound 6 exhibited an excellent anti-Xcc effect with a MIC value of 0.078 mg/mL, which was significantly more potent than the positive control CuSO4 (MIC = 0.3125 mg/mL). Compound 6 inhibited cell growth by disrupting biofilm formation, destroying the cell membrane, and inducing the accumulation of reactive oxygen species. In vivo tests indicated that compound 6 is highly effective in controlling citrus canker disease. These results indicate that compounds 1-8, especially 6, have the potential as lead compounds for the development of new, environmentally friendly, and efficient anti-Xcc pesticides.
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Affiliation(s)
- Jun Zhang
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
| | - Liangliang Gao
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
| | - Huiting Lin
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
| | - Yan Liang
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
| | - Mingnan You
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
| | - Lijian Ding
- Department of Marine Pharmacy, Ningbo University, Ningbo 315211, China
| | - Fangjian Feng
- Department of Marine Pharmacy, Ningbo University, Ningbo 315211, China
| | - Bin Yang
- Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510000, P. R. China
| | - Yonghong Liu
- Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510000, P. R. China
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Vereschuk ML, Alvarenga AE, Zapata PD. Fungal Diseases in Yerba Mate: Status and Management Strategies. Curr Microbiol 2024; 81:190. [PMID: 38795143 DOI: 10.1007/s00284-024-03707-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 04/21/2024] [Indexed: 05/27/2024]
Abstract
Yerba mate (Ilex paraguariensis St. Hil.), with its health benefits and socioeconomic significance, plays a crucial role in Argentina and other South American countries like Brazil and Paraguay. Its cultivation in the Province of Misiones (Argentina) supports various sectors, contributes to regional development, and provides employment opportunities. However, the transition from extractive practices to monoculture, accompanied with increased demand, has led to phytosanitary challenges. Imbalanced native microbiota, disease development, and pathogen dispersion have become prevalent issues. Understanding the known pathogens associated with yerba mate plants is crucial for developing effective agricultural strategies. The primary objective of this study is to synthesise current knowledge on prevalent fungal diseases in yerba mate cultivation, as well as to provide agricultural management recommendations for effective disease control. Fungal diseases can cause significant damage to different parts of the plant, resulting in economic losses. The proximity of neighbouring plantations to yerba mate crops may contribute to the cross-contamination of pathogens, emphasizing the need for comprehensive epidemiology and accurate diagnosis. Multiple fungal genera have been reported to cause pathologies in yerba mate. Among the fungi causing foliar diseases are Ceratobasidium niltonsouzanum, Cylindrocladium spathulatum, Pseudocercospora mate, Asterina sphaerelloides, Colletotrichum gloeosporioides aff var. yerbae, and Phyllosticta sp. Caulinary diseases are caused by Alternaria sp., Phoma sp., Colletotrichum sp., and Ceratocystis fimbriata. Regarding root rot, the genera Rhizoctonia sp., Pythium sp., Fusarium sp., and Rosellinia sp. have been reported. Proper crop management practices and monitoring are essential for effective disease control. To reduce reliance on chemical compounds, the use of biocontrol agents like Trichoderma sp. has shown promise in regulating phytopathogenic fungi populations. Continued research is vital to preserve the yerba mate industry and ensure its long-term viability while minimizing environmental impact.
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Affiliation(s)
- Manuela Lizz Vereschuk
- Laboratorio de Biotecnología Molecular, Instituto de Biotecnología Misiones, Facultad de Ciencias Exactas, Químicas y Naturales (FCEQyN), Universidad Nacional de Misiones (UNaM), "Dra. María Ebe Reca", Ruta 12, km 7.5, C.P.: 3300, Miguel Lanús, Posadas, Misiones, Argentina.
- Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET), Buenos Aires, Argentina.
| | - Adriana Elizabet Alvarenga
- Laboratorio de Biotecnología Molecular, Instituto de Biotecnología Misiones, Facultad de Ciencias Exactas, Químicas y Naturales (FCEQyN), Universidad Nacional de Misiones (UNaM), "Dra. María Ebe Reca", Ruta 12, km 7.5, C.P.: 3300, Miguel Lanús, Posadas, Misiones, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET), Buenos Aires, Argentina
| | - Pedro Darío Zapata
- Laboratorio de Biotecnología Molecular, Instituto de Biotecnología Misiones, Facultad de Ciencias Exactas, Químicas y Naturales (FCEQyN), Universidad Nacional de Misiones (UNaM), "Dra. María Ebe Reca", Ruta 12, km 7.5, C.P.: 3300, Miguel Lanús, Posadas, Misiones, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET), Buenos Aires, Argentina
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Cao Y, Zhang X, Song X, Li W, Ren Z, Feng J, Ma Z, Liu X, Wang Y. Efficacy and toxic action of the natural product natamycin against Sclerotinia sclerotiorum. PEST MANAGEMENT SCIENCE 2024; 80:1981-1990. [PMID: 38087429 DOI: 10.1002/ps.7930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/16/2023] [Accepted: 12/10/2023] [Indexed: 12/31/2023]
Abstract
BACKGROUND Sclerotinia stem rot caused by Sclerotinia sclerotiorum seriously endangers oilseed rape production worldwide, and the occurrence of fungicide-resistant mutants of S. sclerotiorum leads to control decline. Thus, it is critical to explore new green substitutes with different action mechanisms and high antifungal activity. Herein, the activity and the action mechanism of natamycin against S. sclerotiorum were evaluated. RESULTS Natamycin showed potent inhibition on the mycelial growth of S. sclerotiorum, and half-maximal effective concentration (EC50 ) values against 103 S. sclerotiorum strains ranged from 0.53 to 4.04 μg/mL (mean 1.44 μg/mL). Natamycin also exhibited high efficacy against both carbendazim- and dimethachlone-resistant strains of S. sclerotiorum on detached oilseed rape leaves. No cross-resistance was detected between natamycin and carbendazim. Natamycin markedly disrupted hyphal form, sclerotia formation, integrity of the cell membrane, and reduced the content of oxalic acid and ergosterol, whereas it increased the reactive oxygen species (ROS) and malondialdehyde content. Interestingly, exogenous addition of ergosterol could reduce the inhibition of natamycin against S. sclerotiorum. Importantly, natamycin significantly inhibited expression of the Cyp51 gene, which is contrary to results for the triazole fungicide flusilazole, indicating a different action mechanism from triazole fungicides. CONCLUSION Natamycin is a promising effective candidate for the resistance management of S. sclerotiorum. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Yuxuan Cao
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Xianyang, China
| | - Xu Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Xianyang, China
| | - Xiaoning Song
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Xianyang, China
| | - Wenkui Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Xianyang, China
- Provincial Center for Bio-Pesticide Engineering, Xianyang, China
| | - Zheng Ren
- College of Language and Culture, Northwest A&F University, Xianyang, China
| | - Juntao Feng
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Xianyang, China
- Provincial Center for Bio-Pesticide Engineering, Xianyang, China
| | - Zhiqing Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Xianyang, China
- Provincial Center for Bio-Pesticide Engineering, Xianyang, China
| | - Xili Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Xianyang, China
| | - Yong Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Xianyang, China
- Provincial Center for Bio-Pesticide Engineering, Xianyang, China
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Dai P, Jiao J, Li Y, Teng P, Wang Q, Zhu Y, Zhang W. Novel 5-Sulfonyl-1,3,4-thiadiazole-Substituted Flavonoids as Potential Bactericides and Fungicides: Design, Synthesis, Three-Dimensional Quantitative Structure-Activity Relationship Studies. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:6672-6683. [PMID: 38481361 DOI: 10.1021/acs.jafc.3c06367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Flavonoids, ubiquitous natural products, provide sources for drug discovery owing to their structural diversity, broad-spectrum pharmacological activity, and excellent environmental compatibility. To develop antibacterial and antifungal agents with novel mechanisms of action and innovative structures, a series of novel 5-sulfonyl-1,3,4-thiadiazole-substituted flavonoids were designed and synthesized, and their biological activities against seven agriculturally common phytopathogenic microorganisms were evaluated. The results of the antimicrobial bioassay showed that most of the target compounds displayed excellent inhibitory effects against Xanthomonas oryzae, Rhizoctonia solani, and Colletotrichum orbiculare. Compounds 1, 3, 7, 9, 13, and 14 exhibited remarkable antibacterial activity against X. oryzae pv. oryzae with EC50 values below 10 μg/mL, which were superior to bismerthiazol (70.89 μg/mL). Compound 2 (EC50 = 0.41 μg/mL) displayed the most effective inhibitory potency against R. solani in vivo, comparable protective effects with the positive control carbendizam. Preliminary mechanistic studies indicated that compound 2 induced disordered entanglement of hyphae, shrinkage of hyphal surfaces, extravasation of cellular contents, and vacuole swelling and rupture, which disrupted normal hyphal growth. Subsequently, compounds 35-53 with good antifungal activity were designed and synthesized based on reliable three-dimensional quantitative structure-activity relationship (3D-QSAR) models. Compound 49 showed high efficacy and superior antifungal activity against R. solani, with an EC50 value of 0.28 μg/mL and a half-maximal effective concentration of 0.46 μg/mL.
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Affiliation(s)
- Peng Dai
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jian Jiao
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yufei Li
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Peng Teng
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Qingqing Wang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuchuan Zhu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Weihua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
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11
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Jang H, Choi M, Jang KS. Comprehensive phytochemical profiles and antioxidant activity of Korean local cultivars of red chili pepper ( Capsicum annuum L.). FRONTIERS IN PLANT SCIENCE 2024; 15:1333035. [PMID: 38318498 PMCID: PMC10840139 DOI: 10.3389/fpls.2024.1333035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Accepted: 01/09/2024] [Indexed: 02/07/2024]
Abstract
Red chili pepper (Capsicum annuum L.), which belongs to the Solanaceae family, contains a variety of phytochemicals with health-promoting properties including capsaicinoids, phenolics and fatty acids. Red chili pepper is one of the most consumed vegetables in Korea and occupies the largest cultivated area among spices. In this study, the ethanolic extracts from two Korean local cultivars, namely Subicho and Eumseong, were analyzed using a hybrid trapped ion mobility Q-TOF mass spectrometer equipped with a UPLC system, and their phytochemical profiles were then compared with those of a common phytophthora disease-resistant cultivar called Dokbulwang, which is extensively used for red chili pepper powder in public spaces across Korea. Utilizing high-resolution ion-mobility Q-TOF MS analysis, 458 and 192 compounds were identified from the three different red chili peppers in positive and negative ion modes, respectively, by matching with a reference spectral library. Principal component analysis revealed clear distinctions among the three cultivars, allowing us to identify key phytochemical components responsible for discriminating the local cultivars from the public cultivar. Furthermore, the assessment of total flavonoid, phenolic, and antioxidant activity in the red pepper extracts, highlighted their diverse molecular and chemical profiles. Despite the higher total flavonoid and phenolic content values observed in the public cultivar, the radical scavenging rate was higher in the local cultivars, particularly in Subicho. This suggest the presence of stronger antioxidant compounds in the local cultivar, indicating their potential health benefits due to their rich content of bioactive compounds. Notably, the local cultivars exhibited significantly higher proportions of organic compounds (more than four times) and terpenoids (more than two times) compared to the public cultivar. Specifically, higher levels of five major capsaicinoid compounds were found in the local cultivars when compared to the public cultivar. The observed disparities in phytochemical composition and antioxidant activities indicate the molecular diversity present among these cultivars. Further exploration of the bioactive compounds in these local cultivars could prove invaluable for the development of native crops, potentially leading to the discovery of novel sources of bioactive molecules for various applications in health and agriculture.
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Affiliation(s)
- Hyemi Jang
- Bio-Chemical Analysis Team, Korea Basic Science Institute, Cheongju, Republic of Korea
- Division of Bio-Analytical Science, University of Science and Technology, Daejeon, Republic of Korea
| | - Mira Choi
- Bio-Chemical Analysis Team, Korea Basic Science Institute, Cheongju, Republic of Korea
| | - Kyoung-Soon Jang
- Bio-Chemical Analysis Team, Korea Basic Science Institute, Cheongju, Republic of Korea
- Division of Bio-Analytical Science, University of Science and Technology, Daejeon, Republic of Korea
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12
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Ye J, Liu X, Zhou R, Hui T, Li J, Feng J, Ma Z, Gao Y. Natural terpene-based derivatives to control postharvest sclerotinia rot and the involved potential mechanism. Int J Food Microbiol 2024; 409:110461. [PMID: 37922858 DOI: 10.1016/j.ijfoodmicro.2023.110461] [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: 07/02/2023] [Revised: 09/23/2023] [Accepted: 10/24/2023] [Indexed: 11/07/2023]
Abstract
In an effort to develop novel postharvest preservatives of satisfactory environmental compatibility from natural monoterpene, a series of terpene-based derivatives containing oxime ester were designed and prepared. In this research, the inhibitory effect of target compounds against S. sclerotiorum were evaluated though in vitro and in vivo tests. It was investigated that most compounds exhibited promising antifungal activity, especially compound 4k with EC50 value of 3.02 μg/mL, which was significantly superior to commercial fungicide trifloxystrobin. Notably, compound 4k improved the physicochemical quality of carrot including weight loss, contents of titratable acidity, ascorbic acid, carotenoid, malondialdehyde, and enzymes activities, ensuring post-harvest preservation. Simultaneously, the mycelial morphology, ultrastructure, cell wall permeability, and defense/respiration-related enzymes of S. sclerotiorum were destructed. The preliminary toxicity evaluation of target compounds indicated that the prepared target compounds possessed safety and low toxicity. Additionally, the essential chemical features for activity and interaction mode between molecule and cytochrome bc1 complex were inquired by computer-aid technology. The study provided meaningful insight into formulation of natural terpene-based fresh-keeping agent to resist postharvest decay infected by S. sclerotiorum.
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Affiliation(s)
- Jiuhui Ye
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xin Liu
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Rui Zhou
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Tuoping Hui
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jian Li
- College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Juntao Feng
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Zhiqing Ma
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yanqing Gao
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling 712100, Shaanxi, China.
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Zorrilla JG, Innangi M, Cala Peralta A, Soriano G, Russo MT, Masi M, Fernández-Aparicio M, Cimmino A. Sesquiterpene Lactones Isolated from Centaurea cineraria L. subsp. cineraria Inhibit the Radicle Growth of Broomrape Weeds. PLANTS (BASEL, SWITZERLAND) 2024; 13:178. [PMID: 38256732 PMCID: PMC10818712 DOI: 10.3390/plants13020178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 12/27/2023] [Accepted: 01/04/2024] [Indexed: 01/24/2024]
Abstract
The plant Centaurea cineraria L. subsp. cineraria has been investigated as a potential source of inhibitors of broomrape radicle growth. The latter are weeds that pose a threat to agriculture and for which there are few methods available for the control of infestations. Four sesquiterpene lactones have been isolated from C. cineraria L. subsp. cineraria aerial parts and identified as isocnicin, cnicin, salonitenolide, and 11β,13-dihydrosalonitenolide using spectroscopic, spectrometric, and optical methods. Salonitenolide and 11β,13-dihydrosalonitenolide have been isolated for the first time from this plant. Tested at 1.0-0.1 mM against the broomrape species Phelipanche ramosa, Orobanche minor, Orobanche crenata, and Orobanche cumana, isocnicin, cnicin, and salonitenolide demonstrated remarkable inhibitory activity (over 80% in most of the cases) at the highest concentrations. Structure-activity relationship conclusions indicated the significance of the α,β-unsaturated lactone ring. In addition, the synthetic acetylated derivative of salonitenolide showed the strongest activity among all compounds tested, with inhibitions close to 100% at different concentrations, which has been related to a different lipophilicity and the absence of H-bond donor atoms in its structure. Neither the extracts nor the compounds exhibited the stimulating activity of broomrape germination (induction of suicidal germination). These findings highlight the potential of C. cineraria to produce bioactive compounds for managing parasitic weeds and prompt further studies on its sesquiterpene lactones as tools in developing natural product-based herbicides.
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Affiliation(s)
- Jesús G. Zorrilla
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, 80126 Naples, Italy; (J.G.Z.); (G.S.); (M.T.R.); (A.C.)
- Allelopathy Group, Department of Organic Chemistry, Facultad de Ciencias, Institute of Biomolecules (INBIO), University of Cadiz, C/Avenida República Saharaui, s/n, 11510 Puerto Real, Spain;
| | - Michele Innangi
- EnvixLab, Department of Biosciences and Territory, University of Molise, Contrada Fonte Lappone, 86090 Pesche, Italy;
| | - Antonio Cala Peralta
- Allelopathy Group, Department of Organic Chemistry, Facultad de Ciencias, Institute of Biomolecules (INBIO), University of Cadiz, C/Avenida República Saharaui, s/n, 11510 Puerto Real, Spain;
| | - Gabriele Soriano
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, 80126 Naples, Italy; (J.G.Z.); (G.S.); (M.T.R.); (A.C.)
| | - Maria Teresa Russo
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, 80126 Naples, Italy; (J.G.Z.); (G.S.); (M.T.R.); (A.C.)
| | - Marco Masi
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, 80126 Naples, Italy; (J.G.Z.); (G.S.); (M.T.R.); (A.C.)
| | - Mónica Fernández-Aparicio
- Department of Plant Breeding, Institute for Sustainable Agriculture (IAS), CSIC, Avenida Menéndez Pidal s/n, 14004 Córdoba, Spain
| | - Alessio Cimmino
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, 80126 Naples, Italy; (J.G.Z.); (G.S.); (M.T.R.); (A.C.)
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14
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Yang Q, Guo Y, Wang H, Luo Z, Chen Y, Jiang M, Lu H, Valverde BE, Qiang S, Strasser RJ, Chen S. Action of the fungal compound citrinin, a bioherbicide candidate, on photosystem II. PEST MANAGEMENT SCIENCE 2024; 80:133-148. [PMID: 37103431 DOI: 10.1002/ps.7513] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/06/2023] [Accepted: 04/27/2023] [Indexed: 05/12/2023]
Abstract
BACKGROUND Bioherbicides are becoming more attractive as safe weed control tools towards sustainable agriculture. Natural products constitute an important source chemicals and chemical leads for discovery and development of novel pesticide target sites. Citrinin is a bioactive compound produced by fungi of the genera Penicillium and Aspergillus. However, its physiological-biochemical mechanism as a phytotoxin remains unclear. RESULTS Citrinin causes visible leaf lesions on Ageratina adenophora similar to those produced by the commercial herbicide bromoxynil. Phytotoxicity bioassay tests using 24 plant species confirmed that citrinin has a broad activity spectrum and therefore has potential as a bioherbicide. Based on chlorophyll fluorescence studies, citrinin mainly blocks PSII electron flow beyond plastoquinone QA at the acceptor side, resulting in the inactivation of PSII reaction centers. Furthermore, molecular modeling of citrinin docking to the A. adenophora D1 protein suggests that it binds to the plastoquinone QB site by a hydrogen bond between the O1 hydroxy oxygen atom of citrinin and the histidine 215 of the D1 protein, the same way as classical phenolic PSII herbicides do. Finally, 32 new citrinin derivatives were designed and sorted according to free energies on the basis of the molecular model of an interaction between the citrinin molecule and the D1 protein. Five of the modeled compounds had much higher ligand binding affinity within the D1 protein compared with lead compound citrinin. CONCLUSION Citrinin is a novel natural PSII inhibitor that has the potential to be developed into a bioherbicide or utilized as a lead compound for discovery of new derivatives with high herbicidal potency. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Qian Yang
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Yanjing Guo
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
| | - He Wang
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Zhi Luo
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Ying Chen
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Mengyun Jiang
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Huan Lu
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Bernal E Valverde
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
- Research and Development in Tropical Agriculture, Alajuela, Costa Rica
| | - Sheng Qiang
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
| | - Reto Jörg Strasser
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
- Bioenergetics Laboratory, University of Geneva, Geneva, Switzerland
| | - Shiguo Chen
- Weed Research Laboratory, Nanjing Agricultural University, Nanjing, China
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15
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Wei C, Luo S, Liu L, Shi K, Han C, Mohamad OAA, Shao H. Potential of utilizing pathogen-derived mycotoxins as alternatives to synthetic herbicides in controlling the noxious invasive plant Xanthium italicum. PEST MANAGEMENT SCIENCE 2024; 80:122-132. [PMID: 37036068 DOI: 10.1002/ps.7499] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 03/24/2023] [Accepted: 04/10/2023] [Indexed: 05/03/2023]
Abstract
Discovery of environmentally friendly agents for controlling alien invasive species (AIS) is challenging and in urgent need as their expansion continues to increase. Xanthium italicum is a notorious invasive weed that has caused serious ecological and economic impacts worldwide. For the purpose of exploring the possibility of utilizing herbicidal mycotoxins to control this species, three compounds, a new compound, curvularioxide (1), a new naturally occurring compound, dehydroradicinin (2), and a known compound, radicinin (3), were isolated via activity-guided fractionation from the secondary metabolites of the pathogenic Curvularia inaequalis, which was found to infect X. italicum in natural habitats. All isolated compounds exhibited potent herbicidal activity on receiver species. It is noteworthy to mention that their effects on X. italicum in our bioassays were equivalent to the commercial herbicide glyphosate. Subsequent morphological analysis revealed that application of radicinin (3) severely hindered X. italicum seedlings' hypocotyl and root development. Malondialdehyde content and the activity of catalase and peroxidase of the seedlings were also significantly different from the control, implying the occurrence of induced oxidative stress. Our results suggest that pathogens infecting invasive plants might be valuable resources for developing safer herbicides for controlling weeds. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Caixia Wei
- State Key Laboratory of Desert and Oasis Ecology, National Key Laboratory of Ecological Security and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- University of Chinese Academy of Sciences, Beijing, China
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Shihong Luo
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, China
| | - Lin Liu
- College of Pharmacy, Linyi University, Linyi, China
| | - Kai Shi
- State Key Laboratory of Desert and Oasis Ecology, National Key Laboratory of Ecological Security and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Caixia Han
- State Key Laboratory of Desert and Oasis Ecology, National Key Laboratory of Ecological Security and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
| | - Osama Abdalla Abdelshafy Mohamad
- State Key Laboratory of Desert and Oasis Ecology, National Key Laboratory of Ecological Security and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
| | - Hua Shao
- State Key Laboratory of Desert and Oasis Ecology, National Key Laboratory of Ecological Security and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- University of Chinese Academy of Sciences, Beijing, China
- Research Center for Ecology and Environment of Central Asia, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
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16
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Ribeiro VP, Bajsa-Hirschel J, Tamang P, Meepagala K, Duke SO. Antifungal and Phytotoxic Activities of Isolated Compounds from Helietta parvifolia Stems. Molecules 2023; 28:7930. [PMID: 38067660 PMCID: PMC10708216 DOI: 10.3390/molecules28237930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/03/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023] Open
Abstract
The identification of natural and environmentally friendly pesticides is a key area of interest for the agrochemical industry, with many potentially active compounds being sourced from numerous plant species. In this study, we report the bioassay-guided isolation and identification of phytotoxic and antifungal compounds from the ethyl acetate extract of Helietta parvifolia stems. We identified eight compounds, consisting of two coumarins and six alkaloids. Among these, a new alkaloid, 2-hydroxy-3,6,7-trimethoxyquinoline-4-carbaldehyde (6), was elucidated, along with seven known compounds. The phytotoxicity of purified compounds was evaluated, and chalepin (4) was active against Agrostis stolonifera at 1 mM with 50% inhibition of seed germination and it reduced Lemna pausicotata (duckweed) growth by 50% (IC50) at 168 μM. Additionally, we evaluated the antifungal activity against the fungal plant pathogen Colletotrichum fragariae using a thin-layer chromatography bioautography assay, which revealed that three isolated furoquinoline alkaloids (flindersiamine (3), kokusagenine (7), and maculine (8)) among the isolated compounds had the strongest inhibitory effects on the growth of C. fragariae at all tested concentrations. Our results indicate that these active natural compounds, i.e., (3), (4), (7), and (8), could be scaffolds for the production of more active pesticides with better physicochemical properties.
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Affiliation(s)
- Victor Pena Ribeiro
- Agricultural Research Service, Natural Products Utilization Research Unit, U.S. Department of Agriculture, University, MS 38677, USA; (V.P.R.); (J.B.-H.); (P.T.)
| | - Joanna Bajsa-Hirschel
- Agricultural Research Service, Natural Products Utilization Research Unit, U.S. Department of Agriculture, University, MS 38677, USA; (V.P.R.); (J.B.-H.); (P.T.)
| | - Prabin Tamang
- Agricultural Research Service, Natural Products Utilization Research Unit, U.S. Department of Agriculture, University, MS 38677, USA; (V.P.R.); (J.B.-H.); (P.T.)
| | - Kumudini Meepagala
- Agricultural Research Service, Natural Products Utilization Research Unit, U.S. Department of Agriculture, University, MS 38677, USA; (V.P.R.); (J.B.-H.); (P.T.)
| | - Stephen O. Duke
- National Center for Natural Products Research, University, MS 38677, USA;
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Ren Z, Lv M, Liu H, Wen H, Zhang Y, Xu H. Optimization of Osthole as a Pesticide Candidate: Synthesis, Crystal Structures, and Agrochemical Properties of Acrylate Derivatives of Isopropenyl 2,3-Dihydrobenzofurans. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:18301-18311. [PMID: 37966481 DOI: 10.1021/acs.jafc.3c02213] [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: 11/16/2023]
Abstract
For high-value-added application of osthole derivatives as a pesticide candidate in crop protection, by the use of osthole as a lead compound, a series of novel acrylate derivatives of isopropenyl 2,3-dihydrobenzofurans were prepared by the successive bromination, rearrangement, and esterization reactions. Three-dimensional structures of four compounds were determined by single-crystal X-ray diffraction. The possible mechanism for construction of this new isopropenyl 2,3-dihydrobenzofuran skeleton from the osthole was presented. Against Plutella xylostella Linnaeus, compound 32 (R = PhCH2CH2) displayed 3.5-fold potent insecticidal activity of osthole. Against Tetranychus cinnabarinus Boisduval, compound 40 (LC50: 0.165 mg/mL; R = (CH2)13CH3) showed 8.3-fold pronounced acaricidal activity of osthole (LC50: 1.367 mg/mL); notably, its control effect can be comparable to that of the commercial acaricide spirodiclofen. Additionally, the scanning electron microscopy imaging method demonstrated that compound 40 can destroy the stratum corneum of T. cinnabarinus. Compound 40 can be further explored as a lead acaricidal agent.
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Affiliation(s)
- Zili Ren
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Min Lv
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Huqi Liu
- College of Life Science, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Houpeng Wen
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yuling Zhang
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Hui Xu
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
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18
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Zhang C, Wang X, Kaur P, Gan J. A critical review on the accumulation of neonicotinoid insecticides in pollen and nectar: Influencing factors and implications for pollinator exposure. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 899:165670. [PMID: 37478949 DOI: 10.1016/j.scitotenv.2023.165670] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/05/2023] [Accepted: 07/18/2023] [Indexed: 07/23/2023]
Abstract
Neonicotinoids are a class of neuro-active insecticides widely used to protect major crops, primarily because of their broad-spectrum insecticidal activity and low vertebrate toxicity. Owing to their systemic nature, plants readily take up neonicotinoids and translocate them through roots, leaves, and other tissues to flowers (pollen and nectar) that serve as a critical point of exposure to pollinators foraging on treated plants. The growing evidence for potential adverse effects on non-target species, especially pollinators, and persistence has raised serious concerns, as these pesticides are increasingly prevalent in terrestrial and aquatic systems. Despite increasing research efforts, our understanding of the potential toxicity of neonicotinoids and the risks they pose to non-target species remains limited. Therefore, this critical review provides a succinct evaluation of the uptake, translocation, and accumulation processes of neonicotinoids in plants and the factors that may affect the eventual build-up of neonicotinoids in pollen and nectar. The role of plant species, as well as the physicochemical properties and application methods of neonicotinoids is discussed. Potential knowledge gaps are identified, and questions meriting future research are suggested for improving our understanding of the relationship between neonicotinoid residues in plants and exposure to pollinators.
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Affiliation(s)
- Cheng Zhang
- Department of Environmental Sciences, University of California, Riverside 92521, CA, USA; Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China; College of Resources and Environment, Key Laboratory of Agricultural Environment in Universities of Shandong, Shandong Agricultural University, Taian 271018, China
| | - Xinru Wang
- Department of Environmental Sciences, University of California, Riverside 92521, CA, USA; Key Laboratory of Tea Biology and Resources Utilization Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Parminder Kaur
- Department of Environmental Sciences, University of California, Riverside 92521, CA, USA.
| | - Jay Gan
- Department of Environmental Sciences, University of California, Riverside 92521, CA, USA
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Sahni T, Sharma S, Verma D, Kaur H, Kumar S. Exploration of novel syringic esters as antifungal agent against phytopathogenic fungi of maize: Structure-activity studies. J Basic Microbiol 2023; 63:1265-1278. [PMID: 37236164 DOI: 10.1002/jobm.202300040] [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: 01/28/2023] [Revised: 04/13/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023]
Abstract
The production of maize is limited by major diseases such as foliar blights, stalk rot, maydis leaf blight; banded leaf and sheath blight and many more. Synthesis of ecologically sustainable and naturally derived products can help us counter these diseases. Hence, Syringaldehyde (a natural occurring isolate) should explore as a viable option as green agrochemical. We performed a structure-activity study to optimize syringaldehyde and its physicochemical properties. A series of novel syringaldehyde esters was synthesized and investigated focusing on esters' nature of lipophillicity, and membrane affinity. Tri-chloro acetylated ester of syringaldehyde was emerged as broad-spectrum fungicide.
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Affiliation(s)
- Tanvi Sahni
- Department of Chemistry, Punjab Agricultural University, Ludhiana, India
| | - Sunita Sharma
- Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, India
| | - Diksha Verma
- Department of Chemistry, Punjab Agricultural University, Ludhiana, India
| | - Harleen Kaur
- Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, India
| | - Sachin Kumar
- Department of Zoology, Punjab Agricultural University, Ludhiana, India
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20
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Lv M, Li S, Wen H, Wang Y, Du J, Xu H. Expedient discovery of novel oxime ester derivatives of piperine/piperine analogs as potent pesticide candidates and their mode of action against Tetranychus cinnabarinus Boisduval. PEST MANAGEMENT SCIENCE 2023; 79:3459-3470. [PMID: 37139821 DOI: 10.1002/ps.7521] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 04/27/2023] [Accepted: 05/01/2023] [Indexed: 05/05/2023]
Abstract
BACKGROUND Nowadays, pest infestation and resistance have appeared as a consequence of repeated and extensive use of pesticides. Thus, development of new effective pesticide candidates in crop protection is highly desirable. Herein, a series of new piperine derivatives containing oxime ester scaffolds were regioselectively and stereoselectively prepared as pesticidal agents. RESULTS Steric configurations of compounds 2, 5z and 13e were definitively determined by single-crystal X-ray diffraction. Against Tetranychus cinnabarinus, notably, compounds 5f [median lethal concentration (LC50 ) = 0.14 mg mL-1 ] and 5v (LC50 = 0.13 mg mL-1 ) showed >107-fold greater acaricidal activity than piperine (LC50 = 15.02 mg mL-1 ), which were comparable to the commercial acaricide spirodiclofen. Against Aphis citricola, compound 5d (LD50 = 19.12 ng aphid-1 ) exhibited 6.1-fold more potent aphicidal activity than piperine (LD50 = 116.06 ng aphid-1 ). Additionally, through scanning electron microscopy, the toxicology study suggested that the acaricidal activity of piperine derivatives may be related to damage of the cuticle layer crest of T. cinnabarinus. CONCLUSION The structure-activity relationships suggested that 3,4-dioxymethylene of piperine was crucial for its acaricidal activity; and introduction of a certain length of aliphatic chain at the C-2 position was beneficial to the aphicidal and acaricidal activities. Compounds 5f and 5v are potential leads for further structural modification as acaricidal agents. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Min Lv
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Shaochen Li
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Houpeng Wen
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Yanyan Wang
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Jiawei Du
- College of Plant Protection, Northwest A&F University, Yangling, China
| | - Hui Xu
- College of Plant Protection, Northwest A&F University, Yangling, China
- School of Marine Sciences, Ningbo University, Ningbo, China
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21
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Phogat A, Singh J, Malik V, Kumar V. Neuroprotective potential of berberine against acetamiprid induced toxicity in rats: Implication of oxidative stress, mitochondrial alterations, and structural changes in brain regions. J Biochem Mol Toxicol 2023; 37:e23434. [PMID: 37350525 DOI: 10.1002/jbt.23434] [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: 09/28/2022] [Revised: 05/10/2023] [Accepted: 06/12/2023] [Indexed: 06/24/2023]
Abstract
Acetamiprid (ACMP) is an extensively used neonicotinoid pesticide to control sucking and chewing insects and is known to cause nontarget toxicity. The present study aimed to evaluate the ameliorative potential of berberine (BBR)-a polyphenolic alkaloid- on ACMP-induced oxidative stress, mitochondrial dysfunctioning, and structural changes in different rat brain regions. The male Wistar rats were divided into four groups, that is, control, BBR-treated (150 mg/kg b.wt), ACMP-exposed (21.7 mg/kg b.wt) and BBR + ACMP co-treated; and were dosed intragastrically for 21 consecutive days. Results of the biochemical analysis showed that BBR significantly ameliorated ACMP-induced oxidative stress by decreasing lipid peroxidation and protein oxidation along with a marked increase in endogenous antioxidants and lowered AChE activity in rat brain regions. Inside mitochondria, BBR significantly attenuated the toxic effects of ACMP by increasing the activity of mitochondrial complexes. Findings of polymerase chain reaction also demonstrated the modulatory effects of BBR against ACMP-mediated downregulation of ND1, ND2, COX1, and COX4 subunits of mitochondrial complexes. The histopathological and ultrastructural examination also validated the biochemical and transcriptional alterations following toxicity of ACMP exposure and the protective potential of BBR against ACMP-induced neurotoxicity. Thus, the present study indicates the promising ameliorative potential of BBR against ACMP-induced neurotoxicity via its antioxidative and modulatory activities.
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Affiliation(s)
- Annu Phogat
- Department of Zoology, Maharshi Dayanand University, Rohtak, Haryana, India
| | - Jagjeet Singh
- Department of Zoology, Maharshi Dayanand University, Rohtak, Haryana, India
| | - Vinay Malik
- Department of Zoology, Maharshi Dayanand University, Rohtak, Haryana, India
| | - Vijay Kumar
- Department of Biochemistry, Maharshi Dayanand University, Rohtak, Haryana, India
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22
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Zhi XY, Zhang Y, Li YF, Liu Y, Niu WP, Li Y, Zhang CR, Cao H, Hao XJ, Yang C. Discovery of Natural Sesquiterpene Lactone 1- O-Acetylbritannilactone Analogues Bearing Oxadiazole, Triazole, or Imidazole Scaffolds for the Development of New Fungicidal Candidates. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37463456 DOI: 10.1021/acs.jafc.3c02497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
In recent decades, natural products have been considered important resources for developing of new agrochemicals because of their novel architectures and multibioactivities. Consequently, herein, 1-O-acetylbritannilactone (ABL), a natural sesquiterpene lactone from Inula britannica L., was used as a lead for further modification to discover fungicidal candidates. Six series of ABL-based derivatives containing an oxadiazole, triazole, or imidazole moiety were designed and synthesized, and their antifungal activities were also evaluated in vitro and in vivo. Bioassay results revealed that compounds 8d, 8h, and 8j (EC50 = 61.4, 30.9, and 12.4 μg/mL, respectively) exhibited more pronounced inhibitory activity against Fusarium oxysporum than their precursor ABL (EC50 > 500 μg/mL) and positive control hymexazol (EC50 = 77.2 μg/mL). Derivatives 8d and 11j (EC50 = 19.6 and 41.5 μg/mL, respectively) exhibited more potent antifungal activity toward Cytospora mandshurica than ABL (EC50 = 68.3 μg/mL). Compound 10 exhibited excellent and broad-spectrum antifungal activity against seven phytopathogenic fungal mycelia. Particularly, the inhibitory activity of compound 10 against the mycelium of Botrytis cinerea was more than 10.8- and 2.3-fold those of ABL and hymexazol, respectively. Meanwhile, derivative 10 (IC50 = 47.7 μg/mL) displayed more pronounced inhibitory activity against the spore of B. cinerea than ABL (IC50 > 500 μg/mL) and difenoconazole (IC50 = 80.8 μg/mL). Additionally, the in vivo control efficacy of compound 10 against B. cinerea was further studied using infected tomatoes (protective effect = 58.4%; therapeutic effect = 48.7%). The preliminary structure-activity relationship analysis suggested that the introduction of the 1,3,4-oxadiazole moiety (especially the 1,3,4-oxadiazole heterocycle containing the 4-chlorophenyl, 2-furyl, or 2-pyridinyl group) on the skeleton of ABL was more likely to produce potential antifungal compounds. These findings pave the way for further design and development of ABL-based derivatives as potential antifungal agents.
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Affiliation(s)
- Xiao-Yan Zhi
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi, P. R. China
- Shanxi Key Laboratory for Modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu, 030801, Shanxi, P. R. China
| | - Yuan Zhang
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi, P. R. China
| | - Yang-Fan Li
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi, P. R. China
| | - Ying Liu
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi, P. R. China
| | - Wen-Peng Niu
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi, P. R. China
| | - Yang Li
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi, P. R. China
| | - Cheng-Ran Zhang
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi, P. R. China
| | - Hui Cao
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi, P. R. China
| | - Xiao-Juan Hao
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi, P. R. China
| | - Chun Yang
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi, P. R. China
- Shanxi Key Laboratory for Modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu, 030801, Shanxi, P. R. China
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23
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Yang C, Li Y, Zhang Y, Hu Q, Liu Y, Li YF, Shi HC, Song LL, Cao H, Hao XJ, Zhi XY. Natural Sesquiterpene Lactone as Source of Discovery of Novel Fungicidal Candidates: Structural Modification and Antifungal Activity Evaluation of Xanthatin Derived from Xanthium strumarium L. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37449982 DOI: 10.1021/acs.jafc.3c02435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
As part of our ongoing efforts to discover novel agricultural fungicidal candidates from natural sesquiterpene lactones, in the present work, sixty-three xanthatin-based derivatives containing a arylpyrazole, arylimine, thio-acylamino, oxime, oxime ether, or oxime ester moiety were synthesized. Their structures were well characterized by 1H and 13C nuclear magnetic resonance and high-resolution mass spectrometry, while the absolute configurations of compounds 5' and 6a were further determined by single-crystal X-ray diffraction. Meanwhile, the antifungal activities of the prepared compounds against several phytopathogenic fungi were investigated using the spore germination method and the mycelium growth rate method in vitro. The bioassay results illustrated that compounds 5, 5', and 15 exhibited excellent inhibitory activity against the tested fungal spores and displayed remarkable inhibitory effects on fungal mycelia. Compounds 5 and 5' exhibited more potent inhibitory activity (IC50 = 1.1 and 24.8 μg/mL, respectively) against the spore of Botrytis cinerea than their precursor xanthatin (IC50 = 37.6 μg/mL), wherein the antifungal activity of compound 5 was 34-fold higher than that of xanthatin and 71-fold higher than that of the positive control, difenoconazole (IC50 = 78.5 μg/mL). Notably, compound 6'a also demonstrated broad-spectrum inhibitory activity against the four tested fungal spores. Meanwhile, compounds 2, 5, 8, and 15 showed prominent inhibitory activity against the mycelia of Cytospora mandshurica with the EC50 values of 2.3, 11.7, 11.1, and 3.0 μg/mL, respectively, whereas the EC50 value of xanthatin was 14.8 μg/mL. Additionally, compounds 5' and 15 exhibited good in vivo therapeutic and protective effects against B. cinerea with values of 55.4 and 62.8%, respectively. The preliminary structure-activity relationship analysis revealed that the introduction of oxime, oxime ether, or oxime ester structural fragment at the C-4 position of xanthatin or the introduction of a chlorine atom at the C-3 position of xanthatin might be significantly beneficial to antifungal activity. In conclusion, the comprehensive investigation indicated that partial xanthatin-based derivatives from this study could be considered for further exploration as potential lead structures toward developing novel fungicidal candidates for crop protection.
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Affiliation(s)
- Chun Yang
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
- Shanxi Key Laboratory for Modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Yang Li
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Yuan Zhang
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Qiang Hu
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Ying Liu
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Yang-Fan Li
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Hong-Cheng Shi
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Li-Li Song
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Hui Cao
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Xiao-Juan Hao
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
| | - Xiao-Yan Zhi
- Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
- Shanxi Key Laboratory for Modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi Province, P. R. China
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24
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Steinborn C, Tancredi A, Habiger C, Diederich C, Kramer J, Reingruber AM, Laber B, Freigang J, Lange G, Schmutzler D, Machettira A, Besong G, Magauer T, Barber DM. Investigations into Simplified Analogues of the Herbicidal Natural Product (+)-Cornexistin. Chemistry 2023; 29:e202300199. [PMID: 36807428 PMCID: PMC7614749 DOI: 10.1002/chem.202300199] [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: 01/19/2023] [Revised: 02/17/2023] [Accepted: 02/20/2023] [Indexed: 02/22/2023]
Abstract
We report the design, synthesis and biological evaluation of simplified analogues of the herbicidal natural product (+)-cornexistin. Guided by an X-Ray co-crystal structure of cornexistin bound to transketolase from Zea mays, we attempted to identify the key interactions that are necessary for cornexistin to maintain its herbicidal profile. This resulted in the preparation of three novel analogues investigating the importance of substituents that are located on the nine-membered ring of cornexistin. One analogue maintained a good level of biological activity and could provide researchers insights in how to further optimize the structure of cornexistin for commercialization in the future.
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Affiliation(s)
- Christian Steinborn
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Aldo Tancredi
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Christoph Habiger
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Christina Diederich
- Research & Development, Weed Control Bayer AG, Crop Science Division, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Jan Kramer
- Research & Development, Weed Control Bayer AG, Crop Science Division, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Anna M Reingruber
- Research & Development, Weed Control Bayer AG, Crop Science Division, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Bernd Laber
- Research & Development, Weed Control Bayer AG, Crop Science Division, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Jörg Freigang
- Research & Development, Hit Discovery Bayer AG, Crop Science Division, Alfred-Nobel-Straße 50, 40789, Monheim am Rhein, Germany
| | - Gudrun Lange
- Research & Development, Weed Control Bayer AG, Crop Science Division, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Dirk Schmutzler
- Research & Development, Weed Control Bayer AG, Crop Science Division, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Anu Machettira
- Research & Development, Weed Control Bayer AG, Crop Science Division, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Gilbert Besong
- Research & Development, Weed Control Bayer AG, Crop Science Division, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Thomas Magauer
- Institute of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - David M Barber
- Research & Development, Weed Control Bayer AG, Crop Science Division, Industriepark Höchst, 65926, Frankfurt am Main, Germany
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25
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Wang N, Zhu K, Bi Y, Liu F, Yu Z. Anti-Aphid Polyketides from Streptomyces sp. SA61. JOURNAL OF NATURAL PRODUCTS 2023; 86:791-796. [PMID: 36988345 DOI: 10.1021/acs.jnatprod.2c00961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Myzus persicae (Sulzer) is a crop pest causing serious economic losses around the world. For many decades, the management of M. persicae has relied heavily on chemical pesticides, resulting in the development of resistance, and new compounds with activity against M. persicae are needed. Five novel polyketides, strekingmycins A-E (1-5), were isolated from Streptomyces sp. SA61. Their structures were determined based on MS, NMR, and X-ray diffraction data. Strekingmycins were active against M. persicae between 4.4 and 9.4 μg/mL.
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Affiliation(s)
- Ning Wang
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
| | - Kaihui Zhu
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
| | - Yuhui Bi
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
| | - Fei Liu
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
| | - Zhiguo Yu
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
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26
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Zhang YW, Fu XX, Chen JG, Yang YL, Wu WX, Xiao SL, Huang YJ, Peng WW. Antifungal alkaloids from the branch-leaves of Clausena lansium Lour. Skeels (Rutaceae). PEST MANAGEMENT SCIENCE 2023. [PMID: 36889932 DOI: 10.1002/ps.7441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 03/09/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND The rational utilization of botanical secondary metabolites is one of the strategies to reduce the application of chemical fungicides. The extensive biological activities of Clausena lansium indicate that it has the potential to develop botanical fungicides. RESULTS A systematic investigation on the antifungal alkaloids from C. lansium branch-leaves following bioassay-guided isolation was implemented. Sixteen alkaloids, including two new and nine known carbazole alkaloids, one known quinoline alkaloid and four known amides, were isolated. Compounds 4, 7, 12 and 14 showed strong antifungal activity on Phytophthora capsiciwith EC50 values ranging from 50.67 to 70.82 μg mL-1 . Compounds 1, 3, 8, 10, 11, 12 and 16 displayed different degrees of antifungal activity against Botryosphaeria dothidea with EC50 values ranging from 54.18 to 129.83 μg mL-1 . It was reported for the first time that these alkaloids had antifungal effects on P. capsici or B. dothidea, and their structure-activity relationships were further discussed systematically. Additionally, among all alkaloids, dictamine (12) had the strongest antifungal activities against P. capsici (EC50 = 50.67 μg mL-1 ) and B. dothidea (EC50 = 54.18 μg mL-1 ), and its physiological effects on P. capsici and B. dothidea also were further evaluated. CONCLUSION Capsicum lansium is a potential source of antifungal alkaloids, and C. lansium alkaloids had the potential as lead compounds of botanical fungicides in the development of new fungicides with novel action mechanism. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Yu-Wei Zhang
- The Laboratory for Phytochemistry and Botanical Pesticides, College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Xiao-Xiang Fu
- The Laboratory for Phytochemistry and Botanical Pesticides, College of Agriculture, Jiangxi Agricultural University, Nanchang, China
- Jiangxi Province Key Laboratory of Tuberous Plant Biology, Jiangxi Agricultural University, Nanchang, China
| | - Ji-Guang Chen
- The Laboratory for Phytochemistry and Botanical Pesticides, College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Yu-Le Yang
- The Laboratory for Phytochemistry and Botanical Pesticides, College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Wei-Xuan Wu
- The Laboratory for Phytochemistry and Botanical Pesticides, College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Su-Ling Xiao
- The Laboratory for Phytochemistry and Botanical Pesticides, College of Agriculture, Jiangxi Agricultural University, Nanchang, China
| | - Ying-Jin Huang
- Jiangxi Province Key Laboratory of Tuberous Plant Biology, Jiangxi Agricultural University, Nanchang, China
| | - Wen-Wen Peng
- The Laboratory for Phytochemistry and Botanical Pesticides, College of Agriculture, Jiangxi Agricultural University, Nanchang, China
- Jiangxi Province Key Laboratory of Tuberous Plant Biology, Jiangxi Agricultural University, Nanchang, China
- Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang, China
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27
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Alam MS, Sharma M, Kumar R, Das J, Rode S, Kumar P, Prasad R, Sharma AK. In silico identification of potential phytochemical inhibitors targeting farnesyl diphosphate synthase of cotton bollworm ( Helicoverpa armigera). J Biomol Struct Dyn 2023; 41:1978-1987. [PMID: 35037838 DOI: 10.1080/07391102.2022.2025904] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Helicoverpa armigera (Ha), a polyphagous pest, causes significant damage to several crop plants, including cotton. The control of this cosmopolitan pest is largely challenging due to the development of resistance to existing management practices. The Juvenile Hormone (JH) plays a pivotal role in the life cycle of insects by regulating their morphogenetic and gonadotropic development. Hence, enzymes involved in JH biosynthesis are an attractive target for the development of selective insecticides. Farnesyl diphosphate synthase (FPPS), a member protein of (E)-prenyl-transferases, is one of the most crucial enzymes in the biosynthetic pathway of JHs. It catalyzes the condensation of isopentenyl diphosphate (IPP) with dimethylallyl diphosphate (DMAPP), forming farnesyl diphosphate (FPP), a precursor of JH. The study was designed to identify an effective small inhibitory molecule that could inhibit the activity of Helicoverpa armigera - FPPS (HaFPPS) for an effective pest control intervention. Therefore, a 3D model of FPPS protein was generated using homology modeling. The FooDB database library of small molecules was selected for virtual screening, following which binding affinities were evaluated using docking studies. Three top-scored molecules were analyzed for various pharmacophore properties. Further, molecular dynamics (MD) simulation analysis showed that the identified molecules (mitraphylline-ZINC1607834, chlorogenic acid-ZINC2138728 and llagate-ZINC3872446) had a reasonably acceptable binding affinity for HaFPPS and resulted in the formation of a stable HaFPPS-inhibitor(s) complex. The identified phytochemical molecules may be used as potent inhibitors of HaFPPS thus, paving the way for further developing environment-friendly insect growth regulator(s). Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Md Shahid Alam
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Monica Sharma
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Rakesh Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Joy Das
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Surabhi Rode
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Pravindra Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Ramasare Prasad
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Ashwani Kumar Sharma
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, India
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28
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Liu X, Ban N, Fu Z, Gao X, Liu TX, Liang P. Persistent toxicity and dissipation dynamics of afidopyropen against the green peach aphid Myzus persicae (Sulzer) in cabbage and chili. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 252:114584. [PMID: 36724709 DOI: 10.1016/j.ecoenv.2023.114584] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 01/20/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
The green peach aphid, Myzus persicae (Sulzer), is a significant global pest in horticultural and field crops. Afidopyropen is a novel systemic insecticide with high efficacy against sucking pests, and it is suitable for the management of M. persicae. However, the persistent toxicity and dissipation dynamics of afidopyropen in vegetables remain unknown. In this study, we determined the residual activity and dissipation dynamics of afidopyropen against M. persicae on cabbage and chili. The data showed that the toxicity of afidopyropen against M. persicae lasted more than 30 days; the corrected mortality was greater than 80% 10 days after application and was 50-60% 30 days post-application. The afidopyropen residues on cabbage and chili plants were quantified using ultrahigh-pressure liquid chromatography-tandem mass spectrometry. The dissipation half-lives of afidopyropen on cabbage and chili plants ranged from 1.45 to 2.34 days and 3.98-5.98 days at different recommended dosages, respectively. Our findings provide valuable data for the maximum residue limits of afidopyropen on vegetables and will help growers determine the frequency and timing of its application on cabbage and chili.
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Affiliation(s)
- Xiaolan Liu
- Department of Entomology, College of Plant Protection, and Sanya Institute of China Agricultural University, Beijing 100193, China
| | - Ning Ban
- Institute of Entomology, Guizhou University, Guiyang, Guizhou, China
| | - Zhixiao Fu
- Institute of Entomology, Guizhou University, Guiyang, Guizhou, China
| | - Xiwu Gao
- Department of Entomology, College of Plant Protection, and Sanya Institute of China Agricultural University, Beijing 100193, China
| | - Tong-Xian Liu
- Institute of Entomology, Guizhou University, Guiyang, Guizhou, China.
| | - Pei Liang
- Department of Entomology, College of Plant Protection, and Sanya Institute of China Agricultural University, Beijing 100193, China.
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Sparks TC, Sparks JM, Duke SO. Natural Product-Based Crop Protection Compounds─Origins and Future Prospects. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:2259-2269. [PMID: 36693160 DOI: 10.1021/acs.jafc.2c06938] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The continuing need to protect food and fiber production to address the demands of an expanding global population requires new pest management tools for crop protection. Natural products (NPs) have been and continue to be a key source of inspiration for new active ingredients (AIs) for crop protection, accounting for 17% of all crop protection AIs. However, potentially 50% of all crop protection compounds have or could have a NP origin if NP synthetic equivalents (NPSEs, synthetic compounds discovered by other approaches but for which a NP model also happens to exist) are also considered. The real and hypothetical NPs have their greatest impact as insight for new classes of crop protection compounds. Among the different product areas, NPs have their largest influence on the discovery of new insecticides, while herbicides have been the least affected by mining NPs for new AIs. While plants have historically been the largest (60% of the total) source of NPs of AIs for crop protection, in the last 30 years, bacterial NPs have become the largest source (42% of the total) of new classes (first in class) of NP-inspired crop protection AIs. Interest in NPs for crop protection continues, an aspect that is highlighted by the notable rise in the numbers of publications and patents on this topic, especially in the last 20 years. The present analysis further illustrates the continuing interest and value in NPs as sources of and inspiration for new classes of crop protection compounds.
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Affiliation(s)
| | - Janine M Sparks
- Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, Indiana 47907, United States
| | - Stephen O Duke
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Oxford, Mississippi 38655, United States
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da Silva UP, Ferreira BW, de Sousa BL, Barreto RW, Martins FT, de A Neto JH, Vaz BG, da Silva RR, Martins TVF, de Oliveira Mendes TA, Varejão EVV. Synthesis of bis(ylidene) cyclohexanones and their antifungal activity against selected plant pathogenic fungi. Mol Divers 2023; 27:281-297. [PMID: 35441971 DOI: 10.1007/s11030-022-10431-7] [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: 12/10/2021] [Accepted: 03/31/2022] [Indexed: 02/08/2023]
Abstract
Botrytis cinerea, Rhizoctonia solani and Hemileia vastatrix are three species of phytopathogenic fungi behind major crop losses worldwide. These have been selected as target models for testing the fungicide potential of a series of bis(ylidene) cyclohexanones. Although some compounds of this chemical class are known to have inhibitory activity against human pathogens, they have never been explored for the control of phytopathogens until now. In the present work, bis(ylidene) cyclohexanones were synthesized through simple, fast and low-cost base- or acid-catalyzed aldol condensation reaction and tested in vitro against B. cinerea, R. solani and H. vastatrix. bis(pyridylmethylene) cyclohexanones showed the highest activity against the target fungi. When tested at 200 nmol per mycelial plug against R. solani., these compounds completely inhibited the mycelial growth, and the most active bis(pyridylmethylene) cyclohexanone compound had an IC50 of 155.5 nmol plug-1. Additionally, bis(pyridylmethylene) cyclohexanones completely inhibited urediniospore germination of H. vastatrix, at 125 μmol L-1. The most active bis(pyridylmethylene) cyclohexanone had an IC50 value of 4.8 µmol L-1, which was estimated as approximately 2.6 times lower than that found for the copper oxychloride-based fungicide, used as control. Additionally, these substances had a low cytotoxicity against the mammalian Vero cell line. Finally, in silico calculations indicated that these compounds present physicochemical parameters regarded as suitable for agrochemicals. Bis(ylidene) cyclohexanones may constitute promising candidates for the development of novel antifungal agents for the control of relevant fungal diseases in agriculture.
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Affiliation(s)
- Ueveton Pimentel da Silva
- Department of Chemistry, Universidade Federal de Viçosa, Av PH Rolfs sn, Viçosa, Minas Gerais, 36.570-900, Brazil
| | - Bruno Wesley Ferreira
- Department of Phytopathology, Universidade Federal de Viçosa, Av PH Rolfs sn, Viçosa, Minas Gerais, 36.570-900, Brazil
| | - Bianca Lana de Sousa
- Department of Chemistry, Universidade Federal de Viçosa, Av PH Rolfs sn, Viçosa, Minas Gerais, 36.570-900, Brazil
| | - Robert Weingart Barreto
- Department of Phytopathology, Universidade Federal de Viçosa, Av PH Rolfs sn, Viçosa, Minas Gerais, 36.570-900, Brazil
| | - Felipe Terra Martins
- Institute of Chemistry, Universidade Federal de Goiás, Av Esperança, sn, Samambaia, Goiânia, 74.690-900, Brazil
| | - João Honorato de A Neto
- Department of Chemistry, Universidade Federal de São Carlos, Rodovia Washington Luís s/n Km 235, Sao Carlos, SP, 74.690-900, Brazil
| | - Boniek Gontijo Vaz
- Institute of Chemistry, Universidade Federal de Goiás, Av Esperança, sn, Samambaia, Goiânia, 74.690-900, Brazil
| | - Rodolfo Rodrigues da Silva
- Institute of Chemistry, Universidade Federal de Goiás, Av Esperança, sn, Samambaia, Goiânia, 74.690-900, Brazil
| | - Thaís Viana Fialho Martins
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av PH Rolfs sn, Viçosa, Minas Gerais, 36.570-900, Brazil
| | - Tiago Antônio de Oliveira Mendes
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av PH Rolfs sn, Viçosa, Minas Gerais, 36.570-900, Brazil
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Collares LJ, Turchen LM, Guedes RNC. Research Trends, Biases, and Gaps in Phytochemicals as Insecticides: Literature Survey and Meta-Analysis. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12020318. [PMID: 36679031 PMCID: PMC9866902 DOI: 10.3390/plants12020318] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/03/2023] [Accepted: 01/06/2023] [Indexed: 05/26/2023]
Abstract
A 76-year literature survey and meta-analyses were carried out to recognize the trends, biases, and knowledge gaps of studies focusing on major groups of compounds of botanical origin, or phytochemicals, as insecticides. The survey found that the main phytochemicals prospected as insecticides belong to the following major chemical groups: terpenoids, terpenes, and carbonyl, all of which were tested, mainly against beetles (Coleoptera), caterpillars (i.e., larvae of Lepidoptera), and mosquitoes and other flies (i.e., Diptera). These studies are burgeoning at an exponential rate, with an evident focus on mortality endpoint estimates, but they are also neglecting sublethal assessments. China and India in Asia, as well as Brazil in the Americas, were responsible for most studies. The majority of the papers used stored grain insects as experimental models, which limits the applicability and representativeness of the findings. As a result, the main modes of exposure tested were fumigation and contact, which leads to the prevalence of estimates of lethal concentration in these studies. Therefore, a broader range of insect species deserves testing, with suitable modes of exposure identifying and characterizing the main molecules responsible for the insecticidal activity, which is seldom performed. Attention to these needs will circumvent current biases and allow the recognition of the main patterns of association between the origin and structure of phytochemicals and their insecticidal effects.
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Affiliation(s)
- Lara J. Collares
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa 3657-900, MG, Brazil
- Neo Ventures, Rua Alameda Vicente Pinzon, 54, 9° Andar, Vila Olímpia, São Paulo 04547-130, SP, Brazil
| | - Leonardo M. Turchen
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa 3657-900, MG, Brazil
| | - Raul Narciso C. Guedes
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa 3657-900, MG, Brazil
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Wang D, Li M, Li J, Fang Y, Zhang Z. Synthesis of 3,4-dihydroisoquinolin-1(2 H)-one derivatives and their antioomycete activity against the phytopathogen Pythium recalcitrans†. RSC Adv 2023; 13:10523-10541. [PMID: 37021099 PMCID: PMC10068754 DOI: 10.1039/d3ra00855j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 03/27/2023] [Indexed: 04/05/2023] Open
Abstract
In an effort to exploit the bioactive natural scaffold 3,4-dihydroisoquinolin-1(2H)-one for plant disease management, 59 derivatives of this scaffold were synthesized using the Castagnoli–Cushman reaction. The results of bioassay indicated that their antioomycete activity against Pythium recalcitrans was superior to the antifungal activity against the other 6 phytopathogens. Compound I23 showed the highest in vitro potency against P. recalcitrans with an EC50 value of 14 μM, which was higher than that of the commercial hymexazol (37.7 μM). Moreover, I23 exhibited in vivo preventive efficacy of 75.4% at the dose of 2.0 mg/pot, which did not show significant differences compared with those of hymexazol treatments (63.9%). When the dose was 5.0 mg per pot, I23 achieved a preventive efficacy of 96.5%. The results of the physiological and biochemical analysis, the ultrastructural observation and lipidomics analysis suggested that the mode of action of I23 might be the disruption of the biological membrane systems of P. recalcitrans. In addition, the established CoMFA and CoMSIA models with reasonable statistics in the three-dimensional quantitative structure–activity relationship (3D-QSAR) study revealed the necessity of the C4-carboxyl group and other structural requirements for activity. Overall, the above results would help us to better understand the mode of action and the SAR of these derivatives, and provide crucial information for further design and development of more potent 3,4-dihydroisoquinolin-1(2H)-one derivatives as antioomycete agents against P. recalcitrans. A collection of 3,4-dihydroisoquinolin-1(2H)-one derivatives were synthesized by Castagnoli–Cushman reaction to screen antioomycete agents against Pythium recalcitrans.![]()
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Affiliation(s)
- Delong Wang
- Department of Pharmaceutical Engineering, College of Plant Protection, Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Shanxi Agricultural UniversityTaiyuan 030031China
| | - Min Li
- Department of Pharmaceutical Engineering, College of Plant Protection, Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Shanxi Agricultural UniversityTaiyuan 030031China
| | - Jing Li
- Department of Pharmaceutical Engineering, College of Plant Protection, Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Shanxi Agricultural UniversityTaiyuan 030031China
| | - Yali Fang
- Department of Pharmaceutical Engineering, College of Plant Protection, Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Shanxi Agricultural UniversityTaiyuan 030031China
| | - Zhijia Zhang
- Department of Pharmaceutical Engineering, College of Plant Protection, Shanxi Key Laboratory of Integrated Pest Management in Agriculture, Shanxi Agricultural UniversityTaiyuan 030031China
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Seepe HA, Raphoko L, Amoo SO, Nxumalo W. Lantadene A and boswellic acid isolated from the leaves of Lantana camara L. have the potential to control phytopathogenic Fusarium species. Heliyon 2022; 8:e12216. [PMID: 36582687 PMCID: PMC9792760 DOI: 10.1016/j.heliyon.2022.e12216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 09/04/2022] [Accepted: 11/30/2022] [Indexed: 12/16/2022] Open
Abstract
Phytopathogenic Fusarium species are restricting factors causing diseases and yield loss in crop production. As part of exploration for pesticides from medicinal plants, this study aimed to isolate and characterize bioactive compounds from Lantana camara L. and evaluate their efficiency against Fusarium phytopathogens. Phytochemical investigation of ethyl acetate leaf extract led to separation of lantadene A (22-angeloyloxy-9-hydroxy-3-oxo-olean-12-en-28-oic acid) and boswellic acid (11-keto-β-boswellic acid). The chemical structures of the aforementioned compounds were confirmed using physical properties, spectroscopic analysis, and published data. Lantadene A exhibited significant antifungal activity against F. subglutinans, F. proliferatum, F. solani, F. graminearum, and F. semitectum with minimum inhibitory concentration (MIC) less than or equal to 0.63 mg/mL. Boswellic acid exhibited strong activity (MIC = 0.63 mg/mL) against F. subglutinans and F. semitectum. In terms of their toxicity towards Raw 264.7 cells, lantadene A and boswellic acid recorded half-maximal inhibitory concentration values of 84.2 μg/mL and 186.6 μg/mL, respectively. Both lantadene A and boswellic acid had no phytotoxic effect against seed germination and seedling root length. Lantadene A and boswellic acid have strong potential to be further investigated as lead natural fungicides (biopesticides) to control Fusarium crop diseases.
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Affiliation(s)
- Hlabana Alfred Seepe
- Agricultural Research Council—Vegetables, Industrial and Medicinal Plants, Roodeplaat, Private Bag X293, Pretoria 0001, South Africa,Department of Chemistry, University of Limpopo, Private Bag X1106, Sovenga, 0727, Polokwane, South Africa,Döhne Agricultural Development Institute, Plant and Crops Production Research, Private Bag X 15, Stutterheim, 4930, South Africa,Corresponding author.
| | - Lerato Raphoko
- Department of Chemistry, University of Limpopo, Private Bag X1106, Sovenga, 0727, Polokwane, South Africa
| | - Stephen O. Amoo
- Agricultural Research Council—Vegetables, Industrial and Medicinal Plants, Roodeplaat, Private Bag X293, Pretoria 0001, South Africa,Indigenous Knowledge Systems Centre, Faculty of Natural and Agricultural Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa,Department of Botany and Plant Biotechnology, Faculty of Science, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
| | - Winston Nxumalo
- Department of Chemistry, University of Limpopo, Private Bag X1106, Sovenga, 0727, Polokwane, South Africa
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Status of the Resistance of Aphis gossypii Glover, 1877 (Hemiptera: Aphididae) to Afidopyropen Originating from Microbial Secondary Metabolites in China. Toxins (Basel) 2022; 14:toxins14110750. [PMID: 36356000 PMCID: PMC9695873 DOI: 10.3390/toxins14110750] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/18/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022] Open
Abstract
The resistance of cotton aphids to various forms of commonly used pesticides has seriously threatened the safety of the cotton production. Afidopyropen is a derivative of microbial metabolites with pyropene insecticide, which has been shown to be effective in the management of Aphis gossypii. Several field populations of Aphis gossypii were collected from the major cotton-producing regions of China from 2019 to 2021. The resistance of these populations to afidopyropen was estimated using the leaf-dipping method. The LC50 values of these field populations ranged from 0.005 to 0.591 mg a.i. L-1 in 2019, from 0.174 to 4.963 mg a.i. L-1 in 2020 and from 0.517 to 14.16 mg a.i. L-1 in 2021. The resistance ratios for all A. gossypii populations ranged from 0.03 to 3.97 in 2019, from 1.17 to 33.3 in 2020 and from 3.47 to 95.06 in 2021. The afidopyropen resistance exhibited an increasing trend in the field populations of Cangzhou, Binzhou, Yuncheng, Kuerle, Kuitun, Changji and Shawan from 2019 to 2021. This suggests that the resistance development of the cotton aphid to afidopyropen is inevitable. Therefore, it is necessary to rotate or mix afidopyropen with other insecticides in order to inhibit the development of afidopyropen resistance in field populations.
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Huang S, Huang H, Xie J, Wang F, Fan S, Yang M, Zheng C, Han L, Zhang D. The latest research progress on the prevention of storage pests by natural products: Species, mechanisms, and sources of inspiration. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Wang D, Li M, Yuan C, Fang Y, Zhang Z. Guaiacol as a natural melanin biosynthesis inhibitor to control northern corn leaf blight. PEST MANAGEMENT SCIENCE 2022; 78:4557-4568. [PMID: 35833811 DOI: 10.1002/ps.7075] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 05/04/2022] [Accepted: 07/14/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND The natural 1,8-dihydroxynaphthalene (DHN) melanin biosynthesis inhibitors (MBIs) are one of the promising approaches to the integrated management of plant diseases but have received scarce attention until now. Herein, to explore the natural DHN MBIs used in the control of northern corn leaf blight (NCLB), a library of 53 essential oil compounds was used to screen the MBIs against Exserohilum turcicum, the causal pathogen of NCLB, using tricyclazole as a reference compound. RESULTS The results of morphological change in the colony, thermogravimetric analysis, ultraviolet-visible spectroscopy, and transmission electron microscopy confirmed that guaiacol could effectively inhibit the melanin production at 50 μg/mL under in vitro conditions. The in vitro bioassay results indicated that this inhibition effect was concentration-dependent and the minimum inhibition concentration of guaiacol was 50 μg/mL. The in vivo experimental results demonstrated that guaiacol significantly inhibited appressorium formation and penetration on corn leaf sheaths at the concentration of 500 μg/mL. The pot experiment results revealed that there were no differences between guaiacol (500 μg/mL) and tricyclazole (100 μg/mL) in control efficacy. The enzymatic assay suggested that guaiacol might exert the activity through inhibiting DHN polymerization to form melanins, which was distinct from tricyclazole. CONCLUSIONS Taken together, this study screened out guaiacol as a natural MBI from 53 essential oil compounds and verified its effectiveness in the control of NCLB at 500 μg/mL. Above all, this research opened an avenue for exploring natural DHN MBIs in the integrated management of plant diseases. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Delong Wang
- College of Plant Protection, Shanxi Agricultural University, Taiyuan, China
| | - Min Li
- College of Plant Protection, Shanxi Agricultural University, Taiyuan, China
| | - Chunxia Yuan
- College of Plant Protection, Shanxi Agricultural University, Taiyuan, China
| | - Yali Fang
- College of Plant Protection, Shanxi Agricultural University, Taiyuan, China
| | - Zhijia Zhang
- College of Plant Protection, Shanxi Agricultural University, Taiyuan, China
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Li X, Zhao Q, Li A, Jia S, Wang Z, Zhang Y, Wang W, Zhou Q, Pan Y, Shi P. Spatiotemporal distribution and fates of neonicotinoid insecticides during the urban water cycle in the lower reaches of the Yangtze River, China. WATER RESEARCH 2022; 226:119232. [PMID: 36270144 DOI: 10.1016/j.watres.2022.119232] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 09/16/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
Neonicotinoid insecticides (NNIs) are the most popular insecticides worldwide, yet their spatiotemporal distribution and fates during the urban water cycle remain limited on a large watershed scale. Thus, we investigated ten kinds of NNIs in surface water from the lower reaches of the Yangtze River and hubs of the urban water cycle in all seasons. In brief, eight out of ten NNIs were detected, and thiamethoxam (THM), imidacloprid (IMI), and dinotefuran (DNT) were the most abundant NNIs in surface water, with concentrations of 0.29-48.15 ng/L, 1.69-20.57 ng/L, and 0.98-25.32 ng/L, respectively. The average concentrations of total NNIs in summer were 1.96-4.41 folds higher than those in other seasons. NNIs in the effluents of municipal wastewater treatment plants (WWTPs) were lower than those in surface water, while the average concentrations of total NNIs in the effluents of industrial WWTPs were 1.56-6.86 folds higher than those in surface water, indicating that insecticide production is an important source for NNIs in surface water. DNT was the most recalcitrant NNI in WWTPs, with an average removal efficiency of 49.89%, while in drinking water treatment plants (DWTPs), the removal efficiencies of most NNIs were limited, except for clothianidin (CLO) (90%). Risk assessment showed that NNIs posed medium or high risks to aquatic life, and DNT contributed 26.86-51.48% to the cumulative risks of detected NNIs. This study investigates the spatiotemporal distribution and risks of NNIs and provides information for the supervision of NNIs in the Yangtze River basin, China.
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Affiliation(s)
- Xiuwen Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Qiuyun Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Aimin Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Shuyu Jia
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zheng Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Ying Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Wenhui Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Qing Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Yang Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Peng Shi
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
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Wang X, Chai J, Gu Y, Zhang D, Meng F, Si X, Yang C, Xue W. Expedient Discovery for Novel Antifungal Leads Inhibiting Fusarium graminearum: 3-(Phenylamino)quinazolin-4(3 H)-ones Deriving from Systematic Optimizations on a Tryptanthrin Structure. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:13165-13175. [PMID: 36194787 DOI: 10.1021/acs.jafc.2c04933] [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
The ever-increasing resistance of Fusarium graminearum has emerged as a pressing agricultural issue that could be settled by developing novel fungicides owning inimitable action mechanisms. With the aim of discovering novel antifungal leads inhibiting F. graminearum, a tryptanthrin structure was dexterously optimized to generate 30 novel quinazolin-4(3H)-one derivatives. The aforementioned optimization generated the molecule C17 that owned exhilarating in vitro anti-F. graminearum effect (EC50 value = 0.76 μg/mL). Whereafter, the in vivo anti-F. graminearum preventative efficacy of the molecule C17 was measured to be 59.5% at 200 μg/mL, which was approximately comparable with that of carbendazim (64.9%). Furthermore, morphological observations indicated that the molecule C17 could cause the hypha to become slender and dense, distort the outline of cell walls, induce an increase in liposome numbers, and cause the reduction of mitochondria numbers. The above results have emerged as an obbligato complement for developing novel antifungal leads that could effectively control Fusarium head blight.
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Affiliation(s)
- Xiaobin Wang
- College of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China
| | - Jianqi Chai
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yifei Gu
- College of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China
| | - Di Zhang
- College of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China
| | - Fei Meng
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xinxin Si
- College of Pharmacy, Jiangsu Ocean University, Lianyungang 222005, China
| | - Chunlong Yang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wei Xue
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
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Wang R, Gao B, Zhang Q, Qu C, Luo C. Knockdown of TRPV gene Nanchung decreases resistance to the novel pyropene insecticide, afidopyropen, in Bemisia tabaci. Int J Biol Macromol 2022; 224:1566-1575. [DOI: 10.1016/j.ijbiomac.2022.10.242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/10/2022] [Accepted: 10/25/2022] [Indexed: 11/05/2022]
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Qiao Y, Zhang M, Cao Y, Mi Q, Liang S, Feng J, Wang Y. Postharvest sclerotinia rot control in carrot by the natural product hinokitiol and the potential mechanisms involved. Int J Food Microbiol 2022; 383:109939. [PMID: 36166914 DOI: 10.1016/j.ijfoodmicro.2022.109939] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 09/08/2022] [Accepted: 09/20/2022] [Indexed: 11/16/2022]
Abstract
Sclerotinia rot infected by cosmopolitan fungi Sclerotinia sclerotiorum is a serious and destructive disease in carrot production, especially during their postharvest storage. Natural products with the advantages of environmentally friendly and safety have been widely concerned. This research estimated the impact of hinokitiol against S. sclerotiorum and on the quality of carrots. In vitro and in vivo tests demonstrated that hinokitiol had promising antifungal activities against both carbendazim-susceptible and -resistant isolates of S. sclerotiorum. Importantly, it effectively kept the quality and prolonged the shelf life of carrot by declining the loss of weight, ascorbic acid, carotenoid, and total phenolics content, preventing the formation of malondialdehyde, and enhancing the activities of antioxidant enzymes. Further study found that hinokitiol inhibited the formation of sclerotia by destroying the morphology and the integrality of cell membrane, reduced the pathogenicity by suppressing the synthesis of oxalic acid and exopolysaccharide, declined the activities of enzymes and the gene expression related to sclerotia development in S. sclerotiorum. These information evidenced the great potential of hinokitiol as a natural fresh-keeping agent for the management of postharvest decay infected by S. sclerotiorum.
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Affiliation(s)
- Yonghui Qiao
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Mengwei Zhang
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yuxuan Cao
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Qianqian Mi
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shen Liang
- Horticulture Research Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450000, Henan, China
| | - Juntao Feng
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yong Wang
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China; Shaanxi Key Laboratory of Plant Nematology, Bio-Agriculture Institute of Shaanxi, Xi'an 710000, Shaanxi, China.
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Sparks TC, Bryant RJ. Innovation in insecticide discovery: Approaches to the discovery of new classes of insecticides. PEST MANAGEMENT SCIENCE 2022; 78:3226-3247. [PMID: 35452182 DOI: 10.1002/ps.6942] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 04/22/2022] [Indexed: 06/14/2023]
Abstract
The continuing demand for agrochemical insecticides that can meet increasing grower, environmental, consumer and regulatory requirements creates the need for the development of new solutions for managing crop pest insects. The development of resistance to the currently available insecticidal products adds another critical driver for new insecticidal active ingredients (AIs). One avenue to meeting these challenges is the creation of new classes of insecticidal molecules to act as starting points and prototypes stimulating further spectrum, efficacy and environmental impact refinements. A new class of insecticides is foreshadowed by the first molecule exemplifying that class (first-in-class, FIC) and offers one measure of innovation within the agrochemical industry. Most insecticides owe their discovery to competitor-inspired (i.e. competitor patents/products) or next-generation (follow-on to a company's pre-existing product) strategies. In contrast, FIC insecticides primarily emerge from a bioactive hypothesis approach, with the largest segment resulting from the exploration of new areas of chemistry/heterocycles and underexploited motifs. Natural products also play an important role in the discovery of FIC insecticides. Understanding the origins of these FIC compounds and the approaches used in their discovery can provide insights into successful strategies for future FIC insecticides. This review analyses information on historic and recently introduced FIC insecticides. Its main objective has been to identify the most successful discovery strategies for identifying new agrochemical solutions to meet the challenge of minimizing crop losses resulting from insects. © 2022 Society of Chemical Industry.
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Rhizospheric Actinomycetes Revealed Antifungal and Plant-Growth-Promoting Activities under Controlled Environment. PLANTS 2022; 11:plants11141872. [PMID: 35890505 PMCID: PMC9317816 DOI: 10.3390/plants11141872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/12/2022] [Accepted: 07/13/2022] [Indexed: 12/25/2022]
Abstract
Actinomycetes has large habitats and can be isolated from terrestrial soil, rhizospheres of plant roots, and marine sediments. Actinomycetes produce several bioactive secondary metabolites with antibacterial, antifungal, and antiviral properties. In this study, some Actinomycetes strains were isolated from the rhizosphere zone of four different plant species: rosemary, acacia, strawberry, and olive. The antagonistic activity of all isolates was screened in vitro against Escherichia coli and Bacillus megaterium. Isolates with the strongest bioactivity potential were selected and molecularly identified as Streptomyces sp., Streptomyces atratus, and Arthrobacter humicola. The growth-promoting activity of the selected Actinomycetes isolates was in vivo evaluated on tomato plants and for disease control against Sclerotinia sclerotiorum. The results demonstrated that all bacterized plants with the studied Actinomycetes isolates were able to promote the tomato seedlings’ growth, showing high values of ecophysiological parameters. In particular, the bacterized seedlings with Streptomyces sp. and A. humicola showed low disease incidence of S. sclerotiorum infection (0.3% and 0.2%, respectively), whereas those bacterized with S. atratus showed a moderate disease incidence (7.6%) compared with the positive control (36.8%). In addition, the ability of the studied Actinomycetes to produce extracellular hydrolytic enzymes was verified. The results showed that A. humicola was able to produce chitinase, glucanase, and protease, whereas Streptomyces sp. and S. atratus produced amylase and pectinase at high and moderate levels, respectively. This study highlights the value of the studied isolates in providing bioactive metabolites and extracellular hydrolytic enzymes, indicating their potential application as fungal-biocontrol agents.
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Han L, Zhao W, Li A, Zhou B, Zhang J, Wu W. Antifungal activity of l-azetidine-2-carboxylic acid isolated from Disporopsis aspera rhizomes against Podosphaera xanthii. PEST MANAGEMENT SCIENCE 2022; 78:1946-1952. [PMID: 35085420 DOI: 10.1002/ps.6812] [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: 07/17/2021] [Revised: 01/11/2022] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Powdery mildew is one of the fungal diseases commonly occurring in the process of cucurbits protected and open cultivation. Cucumbers, melons and pumpkins are extremely susceptible. The secondary metabolites produced by plants are important sources of fungicides with low toxicity and environment-friendly characteristics. The aim of this study was to reveal the main active ingredient in the crude extracts of Disporopsis aspera rhizomes that inhibit cucurbits powdery mildew and evaluate its activities. RESULTS In this study, the crude extracts of Disporopsis aspera rhizomes were found to exhibit excellent antifungal activity aganist Podosphaera xanthii, a causal agent of cucurbits powdery mildew. Based on the bioassay-guided method, l-azetidine-2-carboxylic acid (l-Aze) was isolated from this genus for the first time. l-Aze showed unique curative and eradicative activity against Podosphaera xanthii in vivo, which has never been reported before. Microscopic observation revealed that the curative spraying of l-Aze could effectively inhibit the mycelial growth, resulting in hollow parts of the mycelia, not forming conidiophores, and interrupting the life cycle of powdery mildew. The eradicative spraying of l-Aze caused the fracture of mycelia and deformity of conidiophores, which could not continue to produce conidia. CONCLUSION l-Aze was the main active ingredient of D. aspera against Podosphaera xanthii, which had both curative and eradicative effects. The results provided a strong possibility of using the crude extracts of D. aspera rhizomes and its main effective component, l-Aze as biocontrol agents to control cucurbits powdery mildew.
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Affiliation(s)
- Lijuan Han
- College of Chemistry & Pharmacy, State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, P. R. China
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, P. R. China
| | - Wangyu Zhao
- College of Chemistry & Pharmacy, State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, P. R. China
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, P. R. China
| | - Aijuan Li
- College of Chemistry & Pharmacy, State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, P. R. China
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, P. R. China
| | - Bo Zhou
- College of Chemistry & Pharmacy, State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, P. R. China
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, P. R. China
| | - Jiwen Zhang
- College of Chemistry & Pharmacy, State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, P. R. China
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, P. R. China
| | - Wenjun Wu
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, P. R. China
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Liu Z, Li QX, Song B. Pesticidal Activity and Mode of Action of Monoterpenes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:4556-4571. [PMID: 35380824 DOI: 10.1021/acs.jafc.2c00635] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Synthetic pesticides are often associated with issues such as pest resistance, persistent residue, nontarget toxicity, and environmental issues. Therefore, the research and development of novel, safe, and effective pesticides has become a focus in pesticide discovery. Monoterpenes are secondary plant metabolites that commonly have multiple action targets and have been used in aromatherapy, alternative medicine, and food industries. Some are highly potent and stereoselective. They can potentially be botanical pesticides and serve as lead candidates for the design and synthesis of new monoterpenoid pesticides for agricultural applications. This article reviews publications and patents found in SciFinder Scholar between 2000 and May 2021 on monoterpenes and mainly focuses on pesticidal activities of frequently studied monoterpenes and their modes of action. The presented information and our views are hopefully useful for the development of monoterpenes as biopesticides and monoterpenoid pesticides.
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Affiliation(s)
- Zhengjun Liu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, P. R. China
- College of Chemistry and Chemical Engineering, Anshun University, Anshun, Guizhou 561000, P. R. China
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Baoan Song
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, P. R. China
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Wang Y, Mu Y, Hu X, Zhang C, Gao Y, Ma Z, Feng J, Liu X, Lei P. Indole/Tetrahydroquinoline as Renewable Natural Resource-Inspired Scaffolds in the Devising and Preparation of Potential Fungicide Candidates. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:4582-4590. [PMID: 35385275 DOI: 10.1021/acs.jafc.1c07879] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
As a continuous effort toward developing novel and highly efficient agrochemicals for integrated management of crop pathogens, two series of oxime ester derivatives from indole and tetrahydroquinoline natural scaffolds were prepared. Guided by the preliminary inhibition rates against ubiquitous and representative fungi, the antifungal profile of the target compounds against Valsa mali was intensively and extensively studied. The tetrahydroquinoline-based derivatives 12a-12r exerted a promising inhibition effect, especially against V. mali. The remarkable compounds 12p (R = 4-OCF3) and 12r (R = 4-OBn) with EC50 values of 0.81 and 0.47 μg/mL, respectively, have a far more prominent activity than commercial fungicide trifloxystrobin. The biochemistry and physiology responses of V. mali after treatment with target compound 12p was examined, and the fruit body production, hyphae morphology, and organelles were profoundly affected. Moreover, the curative effects of compound 12p on apple detached branches and leaves were 57.69 and 64.84% at 100 μg/mL, respectively, which were even superior to that of trifloxystrobin. Meanwhile, the three-dimensional quantitative structure-activity relationship model [comparative molecular field analysis (CoMFA): q2 = 0.823, r2 = 0.924, F = 189.781, and standard error of estimation (SEE) = 0.138 and comparative molecular similarity index analysis (CoMSIA): q2 = 0.795, r2 = 0.904, F = 145.644, and SEE = 0.156] indicated that the antifungal activity of target compounds was facilitated by crucial structural factors, which would render inspiration for further design and discovery of novel fungicidal candidates.
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Affiliation(s)
- Yujia Wang
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yali Mu
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiatong Hu
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Caixia Zhang
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yanqing Gao
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhiqing Ma
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Juntao Feng
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xili Liu
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Peng Lei
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China
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Sparks TC, Bryant RJ. Impact of natural products on discovery of, and innovation in, crop protection compounds. PEST MANAGEMENT SCIENCE 2022; 78:399-408. [PMID: 34549518 DOI: 10.1002/ps.6653] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/10/2021] [Accepted: 09/21/2021] [Indexed: 05/26/2023]
Abstract
Natural products (NPs) have long been an important source of, and inspiration for, developing novel compounds to control weeds, pathogens and insect pests. In this review, we use a dataset of 800 historic, current and emerging crop protection compounds to explore the influence of NPs on the introduction of new crop protection compounds (fungicides, herbicides, insecticides) as a function of time. NPs, their semisynthetic derivatives (NPDs) and compounds inspired by NPs (NP mimics, NPMs) account for 17% of all crop protection compounds. NPs, NPDs, and NPMs have been a fairly constant source of new agrochemicals over the past 70 years. NP synthetic equivalents (NPSEs) is a fourth group of NP-related crop protection compounds composed of synthetic compounds which by chance also happen to have an NP model (but are not involved in the discovery). If NPSE compounds are also included, then 50% of all crop protection compounds hypothetically could have had a NP origin. Similar trends also hold true for the impact of NPs on the discovery of new modes of action (MoA) or innovation in crop protection compounds as measured by the number of first-in-class compounds. NPs have had the largest impact on the numbers and global sales (2018 USD) of insecticides compared to fungicides and herbicides. The present analysis highlights NPs as a long-standing and continuing source of new chemistry, new MoAs and innovation in crop protection compound discovery. © 2021 Society of Chemical Industry.
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Duke SO, Pan Z, Bajsa-Hirschel J, Boyette CD. The potential future roles of natural compounds and microbial bioherbicides in weed management in crops. ADVANCES IN WEED SCIENCE 2022; 40. [PMID: 0 DOI: 10.51694/advweedsci/2022;40:seventy-five003] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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Carvalho R, Dhar P, Haselton A, Heckler I, Hoffmann J, Wilklow-Marnell M, Juneja R, Li Y. Evaluation of the insecticidal properties of Terminalia arjuna ethanolic extracts against Drosophila melanogaster. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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Huang X, Lv M, Ma Q, Zhang Y, Xu H. High Value-Added Application of Natural Products in Crop Protection: Semisynthesis and Acaricidal Activity of Limonoid-Type Derivatives and Investigation of Their Biocompatible O/W Nanoemulsions as Agronanopesticide Candidates. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:14488-14500. [PMID: 34842424 DOI: 10.1021/acs.jafc.1c05450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The increasingly serious resistance of Tetranychus cinnabarinus Boisduval to a wide range of insecticides/acaricides poses a major challenge to their control. The citrus processing industry generates a huge quantity of various wastes that contain many limonoids. To effectively utilize these byproducts and discover more potent green acaricidal molecules as sustainable alternatives for traditional resistant pesticides, various limonoid-type derivatives (halogenated/seven-membered lactam derivatives of obacunone and halogenated/oxime esters/oxime ethers/seven-membered lactam derivatives of limonin) were synthesized based on a diversity-oriented synthetic strategy. The key steric configurations of 10 derivatives were further confirmed by X-ray crystallography. Compound 9m, which displayed greater than 9.7-fold potent acaricidal activity of limonin, was of preeminence. In addition, some interesting structure-activity relationships were observed. Moreover, a biocompatible O/W nanoemulsion delivery system was used to prepare the limonin-based agronanoacaricide, which exhibited pronounced control efficiency against T. cinnabarinus Boisduval in the greenhouse. This systematic investigation will provide valuable information and guidance for future value-added applications of novel eco-friendly natural product-based nanopesticides.
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Affiliation(s)
- Xiaobo Huang
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Min Lv
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qianjun Ma
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yuanyuan Zhang
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Hui Xu
- College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
- School of Marine Sciences, Ningbo University, Ningbo 315211, Zhejiang, China
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Natal CM, Fernandes MJG, Pinto NFS, Pereira RB, Vieira TF, Rodrigues ARO, Pereira DM, Sousa SF, Fortes AG, Castanheira EMS, T Gonçalves MS. New carvacrol and thymol derivatives as potential insecticides: synthesis, biological activity, computational studies and nanoencapsulation. RSC Adv 2021; 11:34024-34035. [PMID: 35497284 PMCID: PMC9042360 DOI: 10.1039/d1ra05616f] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 09/23/2021] [Indexed: 12/12/2022] Open
Abstract
New compounds with potential insecticide activity were synthesized by structural modifications performed in the monoterpenoid phenolic moieties of carvacrol and thymol, resulting in a set of derivatives with the ether function containing the propyl, chloropropyl or hydroxypropyl chains, as well as a bicyclic ether with an unsaturated chain containing a carboxylic acid terminal. In addition, an analogue of carvacrol and thymol isomers bearing methoxyl, 1-hydroxyethyl and (3-chlorobenzoyl)oxy, instead of the three original methyl groups, was also synthesized. Several structural changes that resulted in diminished insecticide activity have been identified, but two significantly active molecules have been synthesized, one of them being less toxic to human cells than the naturally-derived starting materials. Structure-based inverted virtual screening and molecular dynamics simulations demonstrate that these active molecules likely target the insect odorant binding proteins and/or acetylcholinesterase and are able to form stable complexes. For the most promising compounds, nanoencapsulation assays were carried out in liposomes of egg phosphatidylcholine/cholesterol (7 : 3) prepared by both thin film hydration and ethanolic injection methods. The compound-loaded liposomes were generally monodisperse and with sizes smaller than or around 200 nm. The thin film hydration method allowed high encapsulation efficiencies (above 85%) for both compounds and a delayed release, while for the systems prepared by ethanolic injection the encapsulation efficiency is lower than 50%, but the release is almost complete in two days.
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Affiliation(s)
- Carolina M Natal
- Centre of Chemistry, Department of Chemistry, University of Minho Campus of Gualtar 4710-057 Braga Portugal
| | - Maria José G Fernandes
- Centre of Chemistry, Department of Chemistry, University of Minho Campus of Gualtar 4710-057 Braga Portugal
| | - Nuno F S Pinto
- Centre of Chemistry, Department of Chemistry, University of Minho Campus of Gualtar 4710-057 Braga Portugal
| | - Renato B Pereira
- REQUIMTE/LAQV, Laboratory of Pharmacognosy, Department of Chemistry, Faculty of Pharmacy, University of Porto R. Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
| | - Tatiana F Vieira
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Medicine, University of Porto 4200-319 Porto Portugal.,UCIBIO - Applied Molecular Biosciences Unit, BioSIM - Department of Biomedicine, Faculty of Medicine, University of Porto 4200-319 Porto Portugal
| | - Ana Rita O Rodrigues
- Centre of Physics of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus of Gualtar 4710-057 Braga Portugal
| | - David M Pereira
- REQUIMTE/LAQV, Laboratory of Pharmacognosy, Department of Chemistry, Faculty of Pharmacy, University of Porto R. Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
| | - Sérgio F Sousa
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Medicine, University of Porto 4200-319 Porto Portugal.,UCIBIO - Applied Molecular Biosciences Unit, BioSIM - Department of Biomedicine, Faculty of Medicine, University of Porto 4200-319 Porto Portugal
| | - A Gil Fortes
- Centre of Chemistry, Department of Chemistry, University of Minho Campus of Gualtar 4710-057 Braga Portugal
| | - Elisabete M S Castanheira
- Centre of Physics of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus of Gualtar 4710-057 Braga Portugal
| | - M Sameiro T Gonçalves
- Centre of Chemistry, Department of Chemistry, University of Minho Campus of Gualtar 4710-057 Braga Portugal
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