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Zhang L, Huang Y, Duan X, Si H, Luo H, Chen S, Liu L, He H, Wang Z, Liao S. Antifungal Activity and Mechanism of Camphor Derivatives against Rhizoctonia solani: A Promising Alternative Antifungal Agent for Rice Sheath Blight. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:11415-11428. [PMID: 38727515 DOI: 10.1021/acs.jafc.4c02865] [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
Rice sheath blight, caused by the fungus Rhizoctonia solani, poses a significant threat to rice cultivation globally. This study aimed to investigate the potential mechanisms of action of camphor derivatives against R. solani. Compound 4o exhibited superior fungicidal activities in vitro (EC50 = 6.16 mg/L), and in vivo curative effects (77.5%) at 500 mg/L were significantly (P < 0.01) higher than the positive control validamycin·bacillus (66.1%). Additionally, compound 4o exhibited low cytotoxicity and acute oral toxicity for adult worker honeybees of Apis mellifera L. Mechanistically, compound 4o disrupted mycelial morphology and microstructure, increased cell membrane permeability, and inhibited both PDH and SDH enzyme activities. Molecular docking and molecular dynamics analyses indicated a tight interaction of compound 4o with PDH and SDH active sites. In summary, compound 4o exhibited substantial antifungal efficacy against R. solani, serving as a promising lead compound for further optimization of antifungal agents.
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Affiliation(s)
- Li Zhang
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
- College of Agronomy, Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Super Rice Engineering Technology Research Center, Jiangxi Agricultural University, Nanchang 330045, China
| | - Yizhong Huang
- College of Life Sciences, Nanchang Normal University, Nanchang 330032, China
| | | | - Hongyan Si
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
| | - Hai Luo
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
| | - Shangxing Chen
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
| | | | - Haohua He
- College of Agronomy, Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Super Rice Engineering Technology Research Center, Jiangxi Agricultural University, Nanchang 330045, China
| | - Zongde Wang
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
| | - Shengliang Liao
- College of Forestry, East China Woody Fragrance and Flavor Engineering Research Center of National Forestry and Grassland Administration, Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species, Jiangxi Agricultural University, Nanchang 330045, China
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Mao G, Tian Y, Shi J, Liao C, Huang W, Wu Y, Wen Z, Yu L, Zhu X, Li J. Design, Synthesis, Antibacterial, and Antifungal Evaluation of Phenylthiazole Derivatives Containing a 1,3,4-Thiadiazole Thione Moiety. Molecules 2024; 29:285. [PMID: 38257199 PMCID: PMC10820687 DOI: 10.3390/molecules29020285] [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: 12/19/2023] [Revised: 01/01/2024] [Accepted: 01/03/2024] [Indexed: 01/24/2024] Open
Abstract
To effectively control the infection of plant pathogens, we designed and synthesized a series of phenylthiazole derivatives containing a 1,3,4-thiadiazole thione moiety and screened for their antibacterial potencies against Ralstonia solanacearum, Xanthomonas oryzae pv. oryzae, as well as their antifungal potencies against Sclerotinia sclerotiorum, Rhizoctonia solani, Magnaporthe oryzae and Colletotrichum gloeosporioides. The chemical structures of the target compounds were characterized by 1H NMR, 13C NMR and HRMS. The bioassay results revealed that all the tested compounds exhibited moderate-to-excellent antibacterial and antifungal activities against six plant pathogens. Especially, compound 5k possessed the most remarkable antibacterial activity against R. solanacearum (EC50 = 2.23 μg/mL), which was significantly superior to that of compound E1 (EC50 = 69.87 μg/mL) and the commercial agent Thiodiazole copper (EC50 = 52.01 μg/mL). Meanwhile, compound 5b displayed the most excellent antifungal activity against S. sclerotiorum (EC50 = 0.51 μg/mL), which was equivalent to that of the commercial fungicide Carbendazim (EC50 = 0.57 μg/mL). The preliminary structure-activity relationship (SAR) results suggested that introducing an electron-withdrawing group at the meta-position and ortho-position of the benzene ring could endow the final structure with remarkable antibacterial and antifungal activity, respectively. The current results indicated that these compounds were capable of serving as promising lead compounds.
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Affiliation(s)
- Guoqing Mao
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (G.M.); (Y.T.); (J.S.); (C.L.); (W.H.); (Y.W.); (Z.W.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Yao Tian
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (G.M.); (Y.T.); (J.S.); (C.L.); (W.H.); (Y.W.); (Z.W.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Jinchao Shi
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (G.M.); (Y.T.); (J.S.); (C.L.); (W.H.); (Y.W.); (Z.W.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Changzhou Liao
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (G.M.); (Y.T.); (J.S.); (C.L.); (W.H.); (Y.W.); (Z.W.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Weiwei Huang
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (G.M.); (Y.T.); (J.S.); (C.L.); (W.H.); (Y.W.); (Z.W.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Yiran Wu
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (G.M.); (Y.T.); (J.S.); (C.L.); (W.H.); (Y.W.); (Z.W.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Zhou Wen
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (G.M.); (Y.T.); (J.S.); (C.L.); (W.H.); (Y.W.); (Z.W.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Linhua Yu
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (G.M.); (Y.T.); (J.S.); (C.L.); (W.H.); (Y.W.); (Z.W.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Xiang Zhu
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (G.M.); (Y.T.); (J.S.); (C.L.); (W.H.); (Y.W.); (Z.W.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Junkai Li
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (G.M.); (Y.T.); (J.S.); (C.L.); (W.H.); (Y.W.); (Z.W.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
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Tian Y, Shi J, Deng X, Yu T, Hu Y, Hu R, Lei Y, Yu L, Zhu X, Li J. Design, Synthesis, and Antifungal Activity of Some Novel Phenylthiazole Derivatives Containing an Acylhydrazone Moiety. Molecules 2023; 28:7084. [PMID: 37894562 PMCID: PMC10608836 DOI: 10.3390/molecules28207084] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/06/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Crop fungal diseases pose a serious threat to global crop production and quality. Developing new and efficient fungicides is an important measure to control crop diseases. Phenylthiazole was found to be an excellent antifungal skeleton based on our previous study on the structural optimization and biological activity of the natural product thiasporine A. To find new fungicides, 45 phenylthiazole derivatives containing an acylhydrazone moiety were designed and synthesized by the principle of active substructure splicing. Forty-two of the forty-five compounds are novel, except for compounds E1, E14, and E33. Their structures were structurally characterized by 1H NMR, 13C NMR, and HRMS. The antifungal activities of the target compounds against Magnaporthe oryzae Colletotrichum camelliaet, Bipolaris maydis, and Sclerotinia sclerotiorum were evaluated at 25 μg/mL. The bioassay results revealed that most of these compounds exhibited excellent antifungal activities against M. oryzae and C. camelliaet at 25 μg/mL. In particular, compounds E4, E10, E14, E17, E23, E26, and E27 showed the inhibition rate of more than 80% against M. oryzae, with EC50 values of 1.66, 2.01, 2.26, 1.45, 1.50, 1.29, and 2.65 μg/mL, respectively, which were superior to that of the commercial fungicides Isoprothiolane (EC50 = 3.22 μg/mL) and Phenazine-1-carboxylic acid (EC50 = 27.87 μg/mL). The preliminary structure-activity relationship (SAR) results suggested that introducing methyl, halogen, or methoxy at the ortho-position of R1 and the para-position of R2 can endow the final structure with excellent antifungal activity against M. oryzae. The current results provide useful data for developing phenylthiazole derivatives as new fungicides for controlling rice blast caused by M. oryzae.
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Affiliation(s)
- Yao Tian
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (Y.T.); (J.S.); (X.D.); (T.Y.); (Y.H.); (R.H.); (Y.L.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Jinchao Shi
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (Y.T.); (J.S.); (X.D.); (T.Y.); (Y.H.); (R.H.); (Y.L.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Xiaoqian Deng
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (Y.T.); (J.S.); (X.D.); (T.Y.); (Y.H.); (R.H.); (Y.L.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Tingyu Yu
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (Y.T.); (J.S.); (X.D.); (T.Y.); (Y.H.); (R.H.); (Y.L.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Yong Hu
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (Y.T.); (J.S.); (X.D.); (T.Y.); (Y.H.); (R.H.); (Y.L.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Richa Hu
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (Y.T.); (J.S.); (X.D.); (T.Y.); (Y.H.); (R.H.); (Y.L.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Yufeng Lei
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (Y.T.); (J.S.); (X.D.); (T.Y.); (Y.H.); (R.H.); (Y.L.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Linhua Yu
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (Y.T.); (J.S.); (X.D.); (T.Y.); (Y.H.); (R.H.); (Y.L.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
| | - Xiang Zhu
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (Y.T.); (J.S.); (X.D.); (T.Y.); (Y.H.); (R.H.); (Y.L.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Junkai Li
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China; (Y.T.); (J.S.); (X.D.); (T.Y.); (Y.H.); (R.H.); (Y.L.); (L.Y.)
- Institute of Pesticides, Yangtze University, Jingmi Road 88, Jingzhou 434025, China
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