1
|
Leipner J, Ruta N. Discovery of anisiflupurin, an inhibitor of cytokinin dehydrogenase that mitigates heat-induced yield reduction in rice. PEST MANAGEMENT SCIENCE 2024. [PMID: 39140701 DOI: 10.1002/ps.8350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 07/15/2024] [Accepted: 07/18/2024] [Indexed: 08/15/2024]
Abstract
BACKGROUND In a screening of anilinopurine, anisiflupurin was identified as potent inhibitor of cytokinin dehydrogenase/oxidase (CKX). Inhibitors of CKX have been supposed to be potent plant growth regulators to alleviate the detrimental effects of abiotic stress on crop production. The aim of the study was to profile anisiflupurin in a set of physiological assays and to evaluate its potential for heat stress mitigation in rice field trials. RESULTS Anisiflupurin delayed dark-induced senescence and increased transpiration in detached maize leaves in a dose-dependent manner. Similarly, the transpiration of young rice plants under heat stress was increased for several days after application with anisiflupurin. Application of anisiflupurin during early phases of generative growth not only restored heat-induced pollen alterations it increased grain yield in field grown rice under heat conditions as demonstrated in a large field program conducted in southeast Asia. Thereby, efficacy of anisiflupurin was rate-dependent and most effective when applied during early generative growth phases prior heat stress. CONCLUSIONS Application of anisiflupurin secures seed setting by protecting pollen development and enhances grain weight under heat stress conditions in rice. The results of this research opens up a promising avenue for mitigating the adverse effects of heat stress in rice cultivation. © 2024 Society of Chemical Industry.
Collapse
Affiliation(s)
- Jörg Leipner
- Biology Research, Syngenta Crop Protection, Stein, Switzerland
| | - Nathinee Ruta
- Product Biology, Syngenta Crop Protection, Basel, Switzerland
| |
Collapse
|
2
|
Liu J, Wu J, Jin P, Hu J, Lamour K, Yang Z. Activity of the Succinate Dehydrogenase Inhibitor Fungicide Benzovindiflupyr Against Clarireedia spp. PLANT DISEASE 2023; 107:3924-3932. [PMID: 37340553 DOI: 10.1094/pdis-02-23-0201-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
Dollar spot (DS), caused by Clarireedia spp. (formerly Sclerotinia homoeocarpa), is one of the most important diseases of turfgrasses worldwide. Benzovindiflupyr, a pyrazole carboxamide fungicide belonging to succinate dehydrogenase inhibitors, was recently registered for DS control. In this study, baseline sensitivity, toxicity, and control efficacy of benzovindiflupyr against Clarireedia spp. were evaluated. The frequency of sensitivities had a unimodal distribution (Kolmogorov-Smirnov, P > 0.10). The mean EC50 value was 1.109 ± 0.555 μg/ml, with individual values ranging from 0.160 to 2.548 μg/ml. Benzovindiflupyr increased the number of hyphal offshoots and cell membrane permeability and inhibited oxalic acid production. Positive cross-resistance was observed between benzovindiflupyr and boscalid, but not between benzovindiflupyr and thiophanate-methyl, propiconazole, or iprodione. Benzovindiflupyr showed high protective and curative control efficacies in vivo and in field applications. Both protective and curative control efficacies of benzovindiflupyr were significantly better than propiconazole, and equivalent to boscalid, over 2 years of field research. The results have important implications for managing DS and fungicide resistance problems in Clarireedia spp.
Collapse
Affiliation(s)
- Jun Liu
- College of Agro-Grassland Science, Nanjing Agricultural University, Nanjing 210095, P.R. China
| | - Jiaxuan Wu
- College of Agro-Grassland Science, Nanjing Agricultural University, Nanjing 210095, P.R. China
| | - Peiyuan Jin
- College of Agro-Grassland Science, Nanjing Agricultural University, Nanjing 210095, P.R. China
| | - Jian Hu
- College of Agro-Grassland Science, Nanjing Agricultural University, Nanjing 210095, P.R. China
| | - Kurt Lamour
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN 37996, U.S.A
| | - Zhimin Yang
- College of Agro-Grassland Science, Nanjing Agricultural University, Nanjing 210095, P.R. China
| |
Collapse
|
3
|
Ji C, Miao J, Xia B, Dai Y, Yang J, Zhang G, Zhang Q, Wang F, Tang T, Zhao M. Evaluation of the toxic effects of fluindapyr, a novel SDHI fungicide, to the earthworms Eisenia fetida. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 899:165697. [PMID: 37482356 DOI: 10.1016/j.scitotenv.2023.165697] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 07/19/2023] [Accepted: 07/19/2023] [Indexed: 07/25/2023]
Abstract
The emergence of resistance to existing succinate dehydrogenase inhibitor fungicides (SDHIs) calls for the urgent innovation of novel formulations, but also results in an increase information gap on the ecological risks of novel SDHIs especially to non-target organisms. Herein, the environmental behavior and toxicological effects of a novel SDHI, fluindapyr (FIP), were evaluated using earthworm as model non-target organism. Results showed that FIP had a relatively shorter half-live (about 28 days) in artificial soil compared with traditional SDHIs. Besides, FIP exhibited a rapid uptake and bioaccumulation trend in earthworms. For the toxicological effects, FIP suppressed earthworm growth (≥ 5 mg/kg) and reproduction (≥ 1 mg/kg) whereas no lethal effects were observed up to the highest tested concentration of 25 mg/mg. FIP of high exposure concentrations also induced serious epidermis and intestines damage as well as oxidative stress to earthworms after 28-day exposure. In addition, expression of oxidative damage related genes (CAT, CRT, GST, HSP70, SOD) was further verified after FIP exposure. The earthworm Tier 1 RQ also indicated a potential risk for earthworm reproduction. Data presented here may be useful for the risk assessments of FIP in soil ecosystems and help to set appropriate precautions to ensure protection against novel SDHIs.
Collapse
Affiliation(s)
- Chenyang Ji
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy, Zhejiang Shuren University, Hangzhou 310015, PR China
| | - Jiahui Miao
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Bin Xia
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Yaoyao Dai
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Jiawen Yang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Guizhen Zhang
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, PR China
| | - Quan Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Feidi Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory for Pesticide Residue Detection of Ministry of Agriculture and Rural Affairs, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, PR China.
| | - Tao Tang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Key Laboratory for Pesticide Residue Detection of Ministry of Agriculture and Rural Affairs, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, PR China.
| | - Meirong Zhao
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, PR China
| |
Collapse
|
4
|
Li S, Li X, Zhang H, Wang Z, Xu H. The research progress in and perspective of potential fungicides: Succinate dehydrogenase inhibitors. Bioorg Med Chem 2021; 50:116476. [PMID: 34757244 DOI: 10.1016/j.bmc.2021.116476] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/24/2021] [Accepted: 10/11/2021] [Indexed: 12/21/2022]
Abstract
Succinate dehydrogenase inhibitors (SDHIs) have become one of the fastest growing classes of new fungicides since entering the market, and have attracted increasing attention as a result of their unique structure, high activity and broad fungicidal spectrum. The mechanism of SDHIs is to inhibit the activity of succinate dehydrogenase, thereby affecting mitochondrial respiration and ultimately killing pathogenic fungi. At present, they have become popular varieties researched and developed by major pesticide companies in the world. In the review, we focused on the mechanism, the history, the representative varieties, structure-activity relationship and resistance of SDHIs. Finally, the potential directions for the development of SDHIs were discussed. It is hoped that this review can strengthen the individuals' understanding of SDHIs and provide some inspiration for the development of new fungicides.
Collapse
Affiliation(s)
- Shuqi Li
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, 150080 Harbin, China
| | - Xiangshuai Li
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, 150080 Harbin, China
| | - Hongmei Zhang
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, 150080 Harbin, China
| | - Zishi Wang
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, 150080 Harbin, China.
| | - Hongliang Xu
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, 150080 Harbin, China.
| |
Collapse
|
5
|
He F, Wan J, Li X, Chu S, Sun N, Liu R. Toxic effects of benzovindiflupyr, a new SDHI-type fungicide on earthworms (Eisenia fetida). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:62782-62795. [PMID: 34215985 DOI: 10.1007/s11356-021-15207-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
Benzovindiflupyr has received increasing attention as a new novel succinate dehydrogenase inhibitor (SDHI)-type fungicide. Nonetheless, its traces remaining in soil potentially trigger an ecotoxicological threat to soil organisms including earthworms. This paper evaluates the eco-toxicity of different benzovindiflupyr doses (0.1, 1, 5, and 10 mg kg-1) on earthworms (Eisenia fetida) after long-term exposure. Consequently, benzovindiflupyr at higher doses significantly inhibited the activities of respiratory chain complex II and succinate dehydrogenase (SDH) in E. fetida. Besides, the reactive oxygen species (ROS) and lipid peroxidation (LPO) were significantly induced in earthworms when treated with this fungicide. After benzovindiflupyr exposure, activities of antioxidant enzymes including catalase, peroxidase, and superoxide dismutase were activated. However, glutathione S-transferase activity in E. fetida was initially induced then inhibited in earthworms after treatment. Furthermore, benzovindiflupyr exposure induced the protein carbonylation (PCO) level in cells indicating oxidative damage to the cellular protein. Due to the destruction of the normal function in the coelomocytes, the phagocytic activity was initially activated, then inhibited when earthworms were treated at 5 and 10 mg kg-1 concentrations. Additionally, DNA damage was induced (larger olive tail moment (OTM) values) with the increase of benzovindiflupyr doses and exposure time. The weight was significantly decreased after benzovindiflupyr exposure on days 21 and 28. Benzovindiflupyr at higher doses significantly decreased the reproduction (number of cocoons and juveniles) of E. fetida. These findings reveal that benzovindiflupyr potentially induces a potential toxicological risk to earthworms when applied in the mentioned above dosages.
Collapse
Affiliation(s)
- Falin He
- School of Environmental Science and Engineering, America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, People's Republic of China.
| | - Jingqiang Wan
- School of Environmental Science and Engineering, America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, People's Republic of China
| | - Xiangxiang Li
- School of Environmental Science and Engineering, America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, People's Republic of China
| | - Shanshan Chu
- School of Environmental Science and Engineering, America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, People's Republic of China
| | - Ning Sun
- School of Environmental Science and Engineering, America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, People's Republic of China
| | - Rutao Liu
- School of Environmental Science and Engineering, America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, People's Republic of China
| |
Collapse
|
6
|
Zhu J, Li X, Zhang L, Gao Y, Mu W, Liu F. The Bioactivity and Efficacy of Benzovindiflupyr Against Corynespora cassiicola, the Causal Agent of Cucumber Corynespora Leaf Spot. PLANT DISEASE 2021; 105:3201-3207. [PMID: 33560881 DOI: 10.1094/pdis-11-20-2334-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Corynespora cassiicola, which causes Corynespora leaf spot, results in considerable yield loss of cucumber grown in greenhouses. Frequent reports of reduced efficacy and control failure of fungicides warrant new, efficient alternative chemistries. In this study, the sensitivity of C. cassiicola to benzovindiflupyr was evaluated using a collection of 81 isolates collected from Shandong, China. The mean EC50 values for mycelial growth, spore germination, and germ tube elongation of C. cassiicola were 0.69 ± 0.44, 0.12 ± 0.063, and 0.13 ± 0.076 µg ml-1, respectively. Benzovindiflupyr treatment led to a reduced respiration rate and ATP production of C. cassiicola and decreased spore pathogenicity by 21.9% on average. Additionally, detached cucumber leaves sprayed with fungicides before or after inoculation were used to assess the efficacy of benzovindiflupyr against C. cassiicola. Benzovindiflupyr (150 µg ml-1) exhibited preventive and curative efficacies of 86.9 and 77.1%, respectively. Benzovindiflupyr at 150 g a.i. ha-1 provided over 70% efficacy in field trials performed in 2018 and 2019, which was significantly higher than that of the reference fungicides fluopyram and fluxapyroxad at the same dose. Furthermore, the yield of commercial cucumber increased as disease incidence decreased. Our findings pave the way for the introduction of benzovindiflupyr in the integrated management of Corynespora leaf spot.
Collapse
Affiliation(s)
- Jiamei Zhu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - Xiuhuan Li
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - Lingyan Zhang
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - Yangyang Gao
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - Wei Mu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China
- Key Laboratory of Pesticide Toxicology & Application Technique, Shandong Agricultural University, Tai'an, Shandong 271018, China
| | - Feng Liu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China
- Key Laboratory of Pesticide Toxicology & Application Technique, Shandong Agricultural University, Tai'an, Shandong 271018, China
| |
Collapse
|
7
|
Simón MR, Fleitas MC, Castro AC, Schierenbeck M. How Foliar Fungal Diseases Affect Nitrogen Dynamics, Milling, and End-Use Quality of Wheat. FRONTIERS IN PLANT SCIENCE 2020; 11:569401. [PMID: 33329626 PMCID: PMC7717975 DOI: 10.3389/fpls.2020.569401] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 09/23/2020] [Indexed: 05/16/2023]
Abstract
Foliar fungal diseases may cause important losses on yield and quality of wheat (Triticum aestivum L.). They may impact crop growth rate differently, modifying nitrogen (N) dynamics and carbohydrate accumulation in the grain. The relationship between N and carbohydrates accumulation determines the grain protein concentration, which impacts the gluten concentration and rheological properties of the wheat flour. In addition, types of fungicides and N fertilization can influence the intensity of foliar diseases and have an effect on the milling and end-use quality, depending on the bread-making aptitude of the genotypes, the nutritional habit of the pathogen involved, the amount and time of infection, environmental factors, and interactions between these factors. In that way, N fertilization may modify the severity of the diseases according to the nutritional habit of the pathogen involved. Some fungicides, such as strobilurins and carboxamides, produce high levels of disease control and prolong the healthy leaf area duration, which translates into important yield responses, potentially compromising the grain protein concentration by additional carbohydrate production, with consequences in the bread-making quality. Furthermore, infections caused by biotrophic pathogens can be more damaging to N deposition than to dry matter accumulation, whereas the reverse has been generally true for diseases caused by necrotrophic pathogens. The time of infection could also affect yield components and N dynamics differentially. Early epidemics may reduce the number of grains per area and the N remobilization, whereas late epidemics may affect the thousand kernel weight and mainly the N absorption post-flowering. A review updating findings of the effects of infections caused by foliar fungal pathogens of different nutritional habits and the incidence of several factors modifying these effects on the above-ground biomass generation, N dynamics, protein and gluten concentration, milling, rheological properties, loaf volume, and other quality-related traits is summarized. Three main pathogens in particular, for which recent information is available, were taken as representative of biotrophic (Puccinia triticina), necrotrophic (Pyrenophora tritici-repentis), and hemibiotrophic (Zymoseptoria tritici) nutritional habit, and some general models of their effects are proposed. New challenges for researchers to minimize the impact of foliar diseases on end-use quality are also discussed.
Collapse
Affiliation(s)
- María Rosa Simón
- Cerealicultura, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, La Plata, Argentina
- Comisión de Investigaciones Científicas Provincia Buenos Aires, La Plata, Argentina
| | - María Constanza Fleitas
- Department of Plant Sciences, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - Ana Carolina Castro
- Cerealicultura, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, La Plata, Argentina
| | - Matías Schierenbeck
- Cerealicultura, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, La Plata, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas, La Plata, Argentina
- Genebank Department, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| |
Collapse
|
8
|
Ido K, Kiguchi S, Iwahashi F, Yamato S. Physiological effects of mandestrobin. JOURNAL OF PESTICIDE SCIENCE 2020; 45:132-137. [PMID: 32913415 PMCID: PMC7453300 DOI: 10.1584/jpestics.d20-004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
Mandestrobin is a novel and potent fungicide with a methoxyacetamide structure, and inhibits complex III on the mitochondrial respiratory chain of fungi. It is widely accepted that some fungicides, including QOIs and SDHIs, have additional physiological effects on treated plants. In this study, we evaluated the physiological effects of mandestrobin both in the field and the laboratory. Mandestrobin treatment increased the yield of Brassica napus by an average of 6.3% in the field under disease-free conditions. Mandestrobin treatment delayed chlorophyll degradation and the senescence of B. napus leaf discs, and excised Arabidopsis thaliana leaves in darkness. Analyses of transcriptome and gene ontology enrichment of mandestrobin-upregulated genes showed that chlorophyll degradation genes and jasmonate-related genes were downregulated while salicylate-related genes were upregulated by mandestrobin treatment. A possible mechanism by which mandestrobin triggered the physiological effects observed in the field and the laboratory was discussed.
Collapse
Affiliation(s)
- Kunio Ido
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 2–1 Takatsukasa 4-chome, Takarazuka, Hyogo 665–8555, Japan
| | - So Kiguchi
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 2–1 Takatsukasa 4-chome, Takarazuka, Hyogo 665–8555, Japan
| | - Fukumatsu Iwahashi
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 2–1 Takatsukasa 4-chome, Takarazuka, Hyogo 665–8555, Japan
| | - Seiji Yamato
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 2–1 Takatsukasa 4-chome, Takarazuka, Hyogo 665–8555, Japan
| |
Collapse
|
9
|
Zhang Y, Chen Z, Nie J, Zhang FG, Ma JA. Development of Cyanopyrazoles as Building Blocks to Fungicide Fluxapyroxad and Analogues. J Org Chem 2019; 84:7148-7158. [PMID: 31058497 DOI: 10.1021/acs.joc.9b00819] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Herein, we present a facile approach to a diverse collection of 1,4-disubstituted 3-di- or mono-fluoromethylpyrazoles utilizing our previously developed cyanopyrazoles as key building blocks. This method features several merits, such as easily accessible starting materials, broad substrate scope, mild reaction conditions, and simple operation. This protocol further deserves to be highlighted by the successful translation into the synthesis of commercialized fungicide fluxapyroxad and its analogues.
Collapse
Affiliation(s)
- Yue Zhang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. of China
| | - Zhen Chen
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. of China
| | - Jing Nie
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. of China
| | - Fa-Guang Zhang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. of China
| | - Jun-An Ma
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. of China.,State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin 300071 , P. R. of China
| |
Collapse
|
10
|
Huang S, Braun HP, Gawryluk RMR, Millar AH. Mitochondrial complex II of plants: subunit composition, assembly, and function in respiration and signaling. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 98:405-417. [PMID: 30604579 DOI: 10.1111/tpj.14227] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 12/20/2018] [Accepted: 12/21/2018] [Indexed: 05/20/2023]
Abstract
Complex II [succinate dehydrogenase (succinate-ubiquinone oxidoreductase); EC 1.3.5.1; SDH] is the only enzyme shared by both the electron transport chain and the tricarboxylic acid (TCA) cycle in mitochondria. Complex II in plants is considered unusual because of its accessory subunits (SDH5-SDH8), in addition to the catalytic subunits of SDH found in all eukaryotes (SDH1-SDH4). Here, we review compositional and phylogenetic analysis and biochemical dissection studies to both clarify the presence and propose a role for these subunits. We also consider the wider functional and phylogenetic evidence for SDH assembly factors and the reports from plants on the control of SDH1 flavination and SDH1-SDH2 interaction. Plant complex II has been shown to influence stomatal opening, the plant defense response and reactive oxygen species-dependent stress responses. Signaling molecules such as salicyclic acid (SA) and nitric oxide (NO) are also reported to interact with the ubiquinone (UQ) binding site of SDH, influencing signaling transduction in plants. Future directions for SDH research in plants and the specific roles of its different subunits and assembly factors are suggested, including the potential for reverse electron transport to explain the succinate-dependent production of reactive oxygen species in plants and new avenues to explore the evolution of plant mitochondrial complex II and its utility.
Collapse
Affiliation(s)
- Shaobai Huang
- School of Molecular Sciences & ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 6009, Crawley, WA, Australia
| | - Hans-Peter Braun
- Institute of Plant Genetics, Leibniz Universität Hannover, 30419, Hannover, Germany
| | | | - A Harvey Millar
- School of Molecular Sciences & ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 6009, Crawley, WA, Australia
| |
Collapse
|
11
|
Tan Z, Li Z, Jin G, Yu C. Continuous-Flow Process for the Synthesis of 5-Nitro-1,4-dihydro-1,4-methanonaphthalene. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00281] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhiyong Tan
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Chao Wang Road 18, Hangzhou 310014, P. R. China
| | - Zhenhua Li
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Chao Wang Road 18, Hangzhou 310014, P. R. China
| | - Guoqiang Jin
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Chao Wang Road 18, Hangzhou 310014, P. R. China
| | - Chuanming Yu
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region, Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| |
Collapse
|
12
|
Hou YP, Chen YL, Wu LY, Wang JX, Chen CJ, Zhou MG. Baseline sensitivity of Bipolaris maydis to the novel succinate dehydrogenase inhibitor benzovindiflupyr and its efficacy. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 149:81-88. [PMID: 30033021 DOI: 10.1016/j.pestbp.2018.06.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 06/01/2018] [Accepted: 06/10/2018] [Indexed: 06/08/2023]
Abstract
Benzovindiflupyr is a novel member of succinate dehydrogenase inhibitor (SDHI) fungicides. The filamentous fungus Bipolaris maydis Nisik. et Miyake was the causal agent of southern corn leaf blight (SCLB). Here, baseline sensitivity of B. maydis to benzovindiflupyr was established by mycelial growth and conidium germination methods using 96 B. maydis isolates collected from various places of Jiangsu Province of China, and EC50 values ranged from 0.0321 to 0.9149 μg/ml with the mean value of 0.3446 (±0.2248) μg/ml for mycelial growth, and 0.1864 to 0.964 μg/ml with the mean value of 0.5060 (±0.2094) μg/ml for conidium germination respectively. Treated with benzovindiflupyr, the distribution of nuclei and septum of hyphae did not change, but hyphae of offshoot and conidial production of B. maydis decreased significantly, the cell membrane permeability increased. The result of transmission electron microscope showed that the cross section of hypha was out of shape, the cell wall became thin and sparse, the cell membrane were distinctly damaged, organelles dissolved and vacuolated, and the cell nearly broke up. The results suggested that benzovindiflupyr had strong activity against mycelial growth and conidial production of B. maydis by damaging cell wall, membrane and organelles. The protective and curative activity assays for benzovindiflupyr indicated that benzovindiflupyr exhibited excellent suppression of B. maydis development on detached corn leaves. In protective activity assay with application of benzovindiflupyr at 10 μg/ml, the control efficacy reached to 100%. In curative activity assay with application of benzovindiflupyr at 50 μg/ml, the control efficacy reached to 90.72%. This is the first report of baseline sensitivity of B. maydis to benzovindiflupyr and its biological activity against B. maydis. It is recommended that benzovindiflupyr is a excellent candidate for controlling SCLB.
Collapse
Affiliation(s)
- Yi-Ping Hou
- College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Ya-Li Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Luo-Yu Wu
- College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Jian-Xin Wang
- College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Chang-Jun Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Ming-Guo Zhou
- College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China.
| |
Collapse
|