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Mao G, Lu W, Xu Y, Liu H, Xu H, Zeng J. Bruceine D inhibits the growth of Spodoptera litura by inducing cell apoptosis in the midgut via an oxidative burst. PEST MANAGEMENT SCIENCE 2024; 80:3126-3139. [PMID: 38344938 DOI: 10.1002/ps.8017] [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: 08/15/2023] [Revised: 02/02/2024] [Accepted: 02/07/2024] [Indexed: 03/01/2024]
Abstract
BACKGROUND Spodoptera litura is one of the most harmful lepidoptera pests in China, and is difficult to control due to its strong resistance to the current frequently used insecticide species. The requirement to develop pesticides with novel toxicology mechanisms to control S. litura is urgent. The quassinoid of bruceine D display outstanding systemic properties and strong insecticidal activity against S. litura, which possess notable application potential for integrative management of S. litura, but the mechanism of toxicity remains unclear. RESULTS In this study, we found that bruceine D exerts potent growth inhibitory activity against S. litura, disrupting the ecdysone and juvenile hormone titers, and causing long-term adverse effects. Association analysis between transcriptomics and metabolomics suggested that bruceine D affected the digestion and absorption capacity of S. litura larvae by inducing a strong oxidative stress response and cell apoptosis in the intestine. Further analysis demonstrated that bruceine D can inhibit the activities of digestive and antioxidant enzymes and induce malondialdehyde (MDA) and reactive oxygen species (ROS) overaccumulation in the midgut. Moreover, the protein level of Bax, cleavage caspase 3, and cytochrome c expressed in cytoplasm (cyto) were up-regulated by bruceine D, while Bcl-2 and cytochrome c expressed in mitochondria (mito) were down-regulated. In addition, there was a noticeable increase in caspase-3 protease activity. Histopathological observations revealed that bruceine D damages the structure of midgut epithelial cells and activates lysosomes, which subsequently disrupts the midgut tissue. CONCLUSION Overall, our findings suggested that bruceine D induced excessive ROS accumulation in midgut epithelial cells. The resulting cell apoptosis disrupted midgut tissue, leading ultimately to reduced nutrient digestion and absorption in the midgut and the inhibition of larval growth. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Genlin Mao
- Institute of Fruit Tree Research,Guangdong Academy of Agricultural Sciences, Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
| | - Wei Lu
- College of Agronomy, Xinjiang Agricultural University, Urumqi, China
| | - Yuhui Xu
- Institute of Fruit Tree Research,Guangdong Academy of Agricultural Sciences, Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
- College of Agronomy, Xinjiang Agricultural University, Urumqi, China
| | - Huan Liu
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
| | - Hanhong Xu
- National Key Laboratory of Green Pesticide and the State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
| | - Jiwu Zeng
- Institute of Fruit Tree Research,Guangdong Academy of Agricultural Sciences, Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou, China
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Wang M, Li G, Zhou L, Hao Y, Wang L, Mao X, Zhang G, Zhao C. Design, synthesis and bioactivity of a new class of antifungal amino acid-directed phthalide compounds. PEST MANAGEMENT SCIENCE 2024; 80:3182-3193. [PMID: 38358013 DOI: 10.1002/ps.8028] [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: 11/30/2023] [Revised: 01/31/2024] [Accepted: 02/08/2024] [Indexed: 02/16/2024]
Abstract
BACKGROUND Peanut southern blight disease, caused by Sclerotium rolfsii, is a destructive soil-borne fungal disease. The current control measures, which mainly employ succinate dehydrogenase inhibitors, are prone to resistance and toxicity to non-target organisms. As a result, it is necessary to explore the potential of eco-friendly fungicides for this disease. RESULTS Fourteen novel phthalide compounds incorporating amino acid moieties were designed and synthesized. The in vitro activity of analog A1 [half maximal effective concentration (EC50) = 332.21 mg L-1] was slightly lower than that of polyoxin (EC50 = 284.32 mg L-1). It was observed that on the seventh day, the curative activity of A1 at a concentration of 600.00 mg L-1 was 57.75%, while the curative activity of polyoxin at a concentration of 300.00 mg L-1 was 42.55%. These results suggested that our compound exhibited in vivo activity. Peanut plants treated with A1 showed significant agronomic improvements compared to the untreated control. Several compounds in this series exhibited superior root absorption and conduction in comparison to the endothermic fungicide thifluzamide. The growth promotion and absorption-conduction experiments demonstrated the reason for the superior in vivo activity of the target compound. Cytotoxic assays have demonstrated that this series of targeted compounds exhibit low toxicity levels toward human lo2 liver cells. CONCLUSION Our results provide a new strategy for the design and synthesis of novel green compounds. Furthermore, the target compound A1 can serve as a lead for further development of green fungicides. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Meizi Wang
- Department of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou, China
| | - Guangyao Li
- Department of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou, China
| | - Lin Zhou
- Department of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou, China
| | - Youwu Hao
- Department of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Longfei Wang
- Department of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Xuewei Mao
- Department of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
- Henan Key Laboratory of Creation and Application of New Pesticide, Henan Agricultural University, Zhengzhou, China
- Henan Research Center of Green Pesticide Engineering and Technology, Henan Agricultural University, Zhengzhou, China
| | - Guoyan Zhang
- Plant Protection and Quarantine Station of Henan Province, Zhengzhou, China
| | - Chenxiang Zhao
- Department of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, China
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Xiao Y, Wei X, Hu C, Hsiang T, Yin J, Li J. Multiple amino acid transporters as carriers load L-valine-phenazine-1-carboxylic acid conjugate into Ricinus sieve tubes for the phloem translocation. Int J Biol Macromol 2024; 257:128730. [PMID: 38081490 DOI: 10.1016/j.ijbiomac.2023.128730] [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: 12/14/2022] [Revised: 11/03/2023] [Accepted: 12/08/2023] [Indexed: 01/27/2024]
Abstract
Some transporters play important roles in the uptake and acropetal xylem translocation of vectorized agrochemicals. However, it is poorly understood the basipetally phloem-loading functions of transporters toward vectorized agrochemicals. Here, L-Val-PCA (L-valine-phenazine-1-carboxylic acid conjugate) uptake was demonstrated carrier-mediated. RcAAP2, RcANT7, and RcLHT1 showed a similarly up-regulated expression pattern from 62 transporter coding genes in Ricinus at 1 h after L-Val or L-Val-PCA treatment. Subcellular localization revealed that fusion RcAAP2-eGFP, RcANT7-eGFP and RcLHT1-eGFP proteins were expressed in the plasma membrane of mesophyll and phloem cells. Yeast assays found that RcAAP2, RcANT7, and RcLHT1 facilitated L-Val-PCA uptake. To further demonstrate the phloem-loading functions, using vacuum infiltration strategy, an Agrobacterium-mediated RNA interference (RNAi) protocol was constructed in seedlings. HPLC detection indicated that L-Val-PCA phloem sap concentrations were significantly decreased 54.5 %, 27.6 %, and 41.6 % after silencing for 72 h and increased 48.3 %, 52.6 %, and 52.4 % after overexpression, respectively. In conclusion, the plasma membrane-located RcAAP2, RcANT7, and RcLHT1 can loaded L-Val-PCA into Ricinus sieve tubes for the phloem translocation, which may aid in the utilization of transporters and molecular design of phloem-mobile fungicides target root or vascular pathogens.
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Affiliation(s)
- Yongxin Xiao
- College of Agriculture, Yangtze University, Jingzhou 434025, Hubei, China
| | - Xuehua Wei
- College of Agriculture, Yangtze University, Jingzhou 434025, Hubei, China
| | - Ciyin Hu
- College of Agriculture, Yangtze University, Jingzhou 434025, Hubei, China
| | - Tom Hsiang
- School of Environmental Sciences, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Junliang Yin
- College of Agriculture, Yangtze University, Jingzhou 434025, Hubei, China.
| | - Junkai Li
- College of Agriculture, Yangtze University, Jingzhou 434025, Hubei, China.
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Cheng Y, Wang X, Zhao L, Zhang X, Kong Q, Li H, You X, Li Y. Wheat straw pyrochar more efficiently decreased enantioselective uptake of dinotefuran by lettuce and dissemination of antibiotic resistance genes than hydrochar in an agricultural soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 880:163088. [PMID: 36996986 DOI: 10.1016/j.scitotenv.2023.163088] [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: 11/21/2022] [Revised: 03/01/2023] [Accepted: 03/23/2023] [Indexed: 05/27/2023]
Abstract
Remediation of soils pollution caused by dinotefuran, a chiral pesticide, is indispensable for ensuring human food security. In comparison with pyrochar, the effect of hydrochar on enantioselective fate of dinotefuran, and antibiotic resistance genes (ARGs) profiles in the contaminated soils remain poorly understood. Therefore, wheat straw hydrochar (SHC) and pyrochar (SPC) were prepared at 220 and 500 °C, respectively, to investigate their effects and underlying mechanisms on enantioselective fate of dinotefuran enantiomers and metabolites, and soil ARG abundance in soil-plant ecosystems using a 30-day pot experiment planted with lettuce. SPC showed a greater reduction effect on the accumulation of R- and S-dinotefuran and metabolites in lettuce shoots than SHC. This was mainly resulted from the lowered soil bioavailability of R- and S-dinotefuran due to adsorption/immobilization by chars, together with the char-enhanced pesticide-degrading bacteria resulted from increased soil pH and organic matter content. Both SPC and SHC efficiently reduced ARG levels in soils, owing to lowered abundance of ARG-carrying bacteria and declined horizontal gene transfer induced by decreased dinotefuran bioavailability. The above results provide new insights for optimizing char-based sustainable technologies to mitigate pollution of dinotefuran and spread of ARGs in agroecosystems.
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Affiliation(s)
- Yadong Cheng
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Xiao Wang
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Liuwei Zhao
- Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, China
| | - Xin Zhang
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Qingxian Kong
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Hui Li
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC 27695, United States
| | - Xiangwei You
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
| | - Yiqiang Li
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
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5
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Xiao Y, Hu C, Hsiang T, Li J. Amino acid permease RcAAP1 increases the uptake and phloem translocation of an L-valine-phenazine-1-carboxylic acid conjugate. FRONTIERS IN PLANT SCIENCE 2023; 14:1191250. [PMID: 37332709 PMCID: PMC10272580 DOI: 10.3389/fpls.2023.1191250] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/10/2023] [Indexed: 06/20/2023]
Abstract
Amino acid conjugates of pesticides can promote the phloem translocation of parent ingredients, allowing for the reduction of usage, and decreased environmental pollution. Plant transporters play important roles in the uptake and phloem translocation of such amino acid-pesticide conjugates such as L-Val-PCA (L-valine-phenazine-1-carboxylic acid conjugate). However, the effects of an amino acid permease, RcAAP1, on the uptake and phloem mobility of L-Val-PCA are still unclear. Here, the relative expression levels of RcAAP1 were found to be up-regulated 2.7-fold and 2.2-fold by the qRT-PCR after L-Val-PCA treatments of Ricinus cotyledons for 1 h and 3 h, respectively. Subsequently, expression of RcAAP1 in yeast cells increased the L-Val-PCA uptake (0.36 μmol/107 cells), which was 2.1-fold higher than the control (0.17 μmol/107 cells). Pfam analysis suggested RcAAP1 with its 11 transmembrane domains belongs to the amino acid transporter family. Phylogenetic analysis found RcAAP1 to be strongly similar to AAP3 in nine other species. Subcellular localization showed that fusion RcAAP1-eGFP proteins were observed in the plasma membrane of mesophyll cells and phloem cells. Furthermore, overexpression of RcAAP1 for 72 h significantly increased the phloem mobility of L-Val-PCA in Ricinus seedlings, and phloem sap concentration of the conjugate was 1.8-fold higher than the control. Our study suggested that RcAAP1 as carrier was involved in the uptake and phloem translocation of L-Val-PCA, which could lay foundation for the utilization of amino acids and further development of vectorized agrochemicals.
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Affiliation(s)
- Yongxin Xiao
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou, China
| | - Ciyin Hu
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou, China
| | - Tom Hsiang
- School of Environmental Sciences, University of Guelph, Guelph, ON, Canada
| | - Junkai Li
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou, China
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Wang M, Tian Q, Li H, Dai L, Wan Y, Wang M, Han B, Huang H, Zhang Y, Chen J. Visualization and metabolome for the migration and distribution behavior of pesticides residue in after-ripening of banana. JOURNAL OF HAZARDOUS MATERIALS 2023; 446:130665. [PMID: 36592559 DOI: 10.1016/j.jhazmat.2022.130665] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/05/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
Exploring the behavior of pesticide residues in fruits is important for effectively applying pesticides and minimizing the risk of pesticide exposure to humans. However, most studies do not consider in situ visual analysis of residues and migration patterns in fresh fruit samples. We investigated the migration patterns of thiram, propamocarb, imidacloprid and pyraclostrobin in fresh bananas based on ambient mass spectrometry imaging, metabolome and transcriptome analysis. The systemic pesticides entered via lateral penetration and vertical migration over time, which began to internally migrate to the inner core after 6 h. The non-systemic pesticide thiram did not enter the interior of the bananas, and remained only in the peel. The transportation rate of the pesticides increased with the decrease of water-octanol partition coefficient and the relative molecular mass. Moreover, the pesticide migrated fast with the increase of banana ripeness. The pesticides significantly enhanced pyruvate kinase, NADP-dependent malic enzyme, and malate synthase activities in the banana peels through carbohydrate metabolism. The banana pulp was also protected against the external toxicity of pesticides by the ascorbate-glutathione cycle. These results can provide guidelines for the appropriate application of pesticides and their safety evaluation.
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Affiliation(s)
- Meiran Wang
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences; Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation; Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs; Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China; College of Plant Protection, Hainan University, Haikou 570228, Hainan, China
| | - Qiaoxia Tian
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences; Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation; Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs; Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China; International School of Public Health and One Health, Hainan Medical University, Haikou 571199, Hainan, China
| | - Hongxing Li
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences; Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation; Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs; Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China
| | - Longjun Dai
- Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan, China
| | - Yi Wan
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, Hainan, China
| | - Mingyue Wang
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences; Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation; Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs; Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China
| | - Bingjun Han
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences; Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation; Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs; Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China.
| | - Huaping Huang
- Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, Hainan, China.
| | - Yunuo Zhang
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, Hainan, China.
| | - Juncheng Chen
- Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences; Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation; Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs; Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou, 571101, Hainan, China; International School of Public Health and One Health, Hainan Medical University, Haikou 571199, Hainan, China.
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Lin S, Zhang L, Zhang P, Huang R, Khan MM, Fahad S, Cheng D, Zhang Z. Effects of glycosylation on the accumulation and transport of fipronil in earthworm (Eisenia fetida). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:3688-3696. [PMID: 35953750 DOI: 10.1007/s11356-022-22417-x] [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: 04/19/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
In this study, the differences in the accumulation of fipronil (F) and the glycosylated product glucose-fipronil (GTF) in Eisenia fetida within 48 h were investigated, and the reason for these differences was discussed. The accumulation of F and GTF in E. fetida and soil was determined by high-performance liquid chromatography (HPLC) after simple, rapid pretreatment; the mean recoveries of F and GTF were 84.79 ~ 95.83%, and the relative standard deviations were 3.39 ~ 9.21%, indicating that the methods could accurately detect the accumulation of F and GTF in E. fetida and soil. Results showed that the accumulation concentrations of F and GTF in E. fetida increased with exposure time; the concentrations of F in E. fetida were 3.1 ~ 6.2 times higher than those of GTF. In addition, the half-lives of GTF in soil (16.90 ~ 18.24 days) were significantly lower than those of F (24.75 ~ 26.65 days). After the addition of phlorizin, a hexose transport inhibitor, the accumulation of F in E. fetida did not change significantly, but the accumulation of GTF in E. fetida was significantly inhibited. The concentrations of GTF in E. fetida after adding phlorizin were 32.71 ~ 59.07% of those without phlorizin. Overall, our results indicated that the uptake and transport of F and GTF in E. fetida were significantly different; the uptake and transport of GTF was related to monosaccharide transporters, and glycosylation could reduce the bioaccumulation of fipronil to E. fetida and shorten the half-life of fipronil in soil, providing an important reference for the application of glucose-fipronil.
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Affiliation(s)
- Sukun Lin
- Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Li Zhang
- Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Peiwen Zhang
- Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Rilin Huang
- Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Muhammad Musa Khan
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou, 510642, China
| | - Shah Fahad
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, 570228, China
- Department of Agronomy, The University of Haripur, Khyber Pakhtunkhwa, Pakistan
| | - Dongmei Cheng
- Department of Plant Protection, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Zhixiang Zhang
- Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou, 510642, China.
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Guichard B, Wu H, La Camera S, Hu R, Marivingt‐Mounir C, Chollet J. Synthesis, phloem mobility and induced plant resistance of synthetic salicylic acid amino acid or glucose conjugates. PEST MANAGEMENT SCIENCE 2022; 78:4913-4928. [PMID: 36054797 PMCID: PMC9804902 DOI: 10.1002/ps.7112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 07/29/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND The growing demand for food, combined with a strong social expectation for a diet produced with fewer conventional agrochemical inputs, has led to the development of new alternatives in plant protection worldwide. Among different possibilities, the stimulation of the plant innate immune system by chemicals represents a novel and promising way. The vectorization strategy of an active ingredient that we previously developed with fungicides can potentially extend to salicylic acid (SA) or its halogenated analogues. RESULTS Using the click chemistry method, six new conjugates combining SA or two mono- or di-halogenated analogues with L-glutamic acid or β-D-glucose via a 1,2,3-triazole nucleus have been synthesized. Conjugate 8a, which is derived from SA and glutamic acid, showed high phloem mobility in the Ricinus model, similar to that of SA alone despite a much higher steric hindrance. In vivo bioassays of the six conjugates against two maize pathogenic fungi Bipolaris maydis and Fusarium graminearum revealed that, unlike SA, the amino acid conjugate 8a with good phloem mobility exerted a protective effect not only locally at the application site, but also in distant stem tissues after foliar application. Moreover, compounds 8a and 8b induced up-regulation of both defense-related genes ZmNPR1 and ZmPR1 similar to their parent compounds upon challenge inoculation with B. maydis. CONCLUSION The vectorization of salicylic acid or its halogenated derivatives by coupling them with an α-amino acid can be a promising strategy to stimulate SA-mediated plant defenses responses against pathogens outside the application site. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Benoit Guichard
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), Unité Mixte de Recherche CNRS 7285Université de PoitiersPoitiersFrance
| | - Hanxiang Wu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Sylvain La Camera
- Laboratoire Écologie & Biologie des Interactions, Unité Mixte de Recherche CNRS 7267Université de PoitiersPoitiersFrance
| | - Richa Hu
- School of Nuclear Technology and Chemistry & BiologyHubei University of Science and TechnologyXianningChina
| | - Cécile Marivingt‐Mounir
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), Unité Mixte de Recherche CNRS 7285Université de PoitiersPoitiersFrance
| | - Jean‐François Chollet
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), Unité Mixte de Recherche CNRS 7285Université de PoitiersPoitiersFrance
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Cheng X, Zhang S, Shao S, Zheng R, Yu Z, Ye Q. Translocation and metabolism of the chiral neonicotinoid cycloxaprid in oilseed rape (Brassica napus L.). JOURNAL OF HAZARDOUS MATERIALS 2022; 426:128125. [PMID: 34971988 DOI: 10.1016/j.jhazmat.2021.128125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/17/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
Neonicotinoids have been banned in some countries because of increased nontarget resistance and ecological toxicity. Cycloxaprid is a potentially promising substitute, but its metabolism in plants is still poorly understood. The study aims to clarify the translocation of cycloxaprid, identify its metabolites, propose possible metabolic pathways and compare differences between enantiomers in oilseed rape via 14C tracing technology and HPLC-QTOF-MS. The results showed that most cycloxaprid remained in the treated leaves, and only a small amount translocated to the anthers. Seven metabolites were identified, and the possible metabolic pathway was divided into two phases. Phase Ⅰ metabolism included two metabolites obtained via cleavage of the oxa-bridged seven-membered ring. Phase II metabolism was responsible for glucose conjugate formation. The possible metabolic pathways revealed that the proportion of phase I metabolites gradually decreased over time, and the phase II metabolites transformed from monosaccharide and disaccharide conjugates to trisaccharide and tetrasaccharide conjugates. The levels of metabolites were significantly different between the enantiomers. In particular, the main metabolite was M4, which has confirmed biological toxicity. M2 was the only metabolite detected in rapeseed. The results will promote the scientific application of cycloxaprid in agriculture and could have implications for assessing environmental risk.
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Affiliation(s)
- Xi Cheng
- Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture of the PRC and Zhejiang Province, Zhejiang University, Hangzhou 310058, PR China.
| | - Sufen Zhang
- Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture of the PRC and Zhejiang Province, Zhejiang University, Hangzhou 310058, PR China.
| | - Siyao Shao
- Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture of the PRC and Zhejiang Province, Zhejiang University, Hangzhou 310058, PR China.
| | - Ruonan Zheng
- Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture of the PRC and Zhejiang Province, Zhejiang University, Hangzhou 310058, PR China.
| | - Zhiyang Yu
- Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture of the PRC and Zhejiang Province, Zhejiang University, Hangzhou 310058, PR China.
| | - Qingfu Ye
- Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture of the PRC and Zhejiang Province, Zhejiang University, Hangzhou 310058, PR China.
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10
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Zhu X, Zhang M, Xiao Y, Hsiang T, Hu C, Li J. Systemic fungicidal activity of phenazine-1-carboxylic acid-valine conjugate against tobacco sore shin and its translocation and accumulation in tobacco (Nicotiana tabacum L.). PEST MANAGEMENT SCIENCE 2022; 78:1117-1127. [PMID: 34796616 DOI: 10.1002/ps.6724] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 11/02/2021] [Accepted: 11/19/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Tobacco sore shin caused by Rhizoctonia solani Kühn is a major soil-borne fungal disease of tobacco, gradually causing infected stems to become thin and dry, leading to great losses to China's tobacco industry. Fungicides with phloem mobility are needed for application to foliage to effectively control root or vascular system pathogens. In this study, phenazine-1-carboxylic acid-valine conjugate (PCA-Val) with strong phloem mobility was tested for control of tobacco sore shin. In vitro fungicidal activity, systemicity, and in vivo efficacy of PCA-Val against R. solani in tobacco seedling were evaluated. RESULTS In vitro fungicidal activity of PCA-L-Val against R. solani was lower than that of PCA or PCA-D-Val, but the in vivo protective activity and curative activity of PCA-L-Val was the highest among these chemicals tested. The systemicity tests in tobacco seedlings revealed that PCA did not possess phloem mobility, while PCA-L-Val and PCA-D-Val exhibited strong phloem mobility and could be transported and accumulated in the lower part of the seedling as well as throughout the phloem. In addition, we also found that, just like reported hormone amino acid conjugates, PCA-L-Val could be hydrolyzed by tobacco seedlings, to release free PCA. CONCLUSIONS The current research results indicated that PCA-L-Val possess good phloem transport in tobacco and promising in vivo antifungal activity against R. solani, which can be used as a phloem-mobile fungicide against tobacco sore shin in production practice.
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Affiliation(s)
- Xiang Zhu
- Hubei Engineering Technology Center for Pest Forewarning and Management, College of Agriculture, Yangtze University, Jingzhou, China
- Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Min Zhang
- Hubei Engineering Technology Center for Pest Forewarning and Management, College of Agriculture, Yangtze University, Jingzhou, China
- Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Yongxin Xiao
- Hubei Engineering Technology Center for Pest Forewarning and Management, College of Agriculture, Yangtze University, Jingzhou, China
- Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Tom Hsiang
- School of Environmental Sciences, University of Guelph, Guelph, ON, Canada
| | - Ciyin Hu
- Hubei Engineering Technology Center for Pest Forewarning and Management, College of Agriculture, Yangtze University, Jingzhou, China
- Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Junkai Li
- Hubei Engineering Technology Center for Pest Forewarning and Management, College of Agriculture, Yangtze University, Jingzhou, China
- Institute of Pesticides, Yangtze University, Jingzhou, China
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11
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Liu X, Chen Y, Deng Y, Xiao C, Luan S, Huang Q. Novel Galactosyl Moiety-Conjugated Furylchalcones Synthesized Facilely Display Significant Regulatory Effect on Plant Growth. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1766-1775. [PMID: 35107011 DOI: 10.1021/acs.jafc.1c05240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The expansion of weed infestation has increased the demand on new herbicides. A series of novel galactosyl moiety-conjugated furylchalcones was facilely synthesized in which the furyl group (A ring) was combined with the substituted benzene group (B ring), and a galactosyl moiety was introduced. All these galactosyl furylchalcones were predicted to be phloem-mobile. Most of the galactosyl furylchalcones significantly promoted early seedling growth of sorghum and barnyardgrass under dark conditions, but all of them revealed considerable anti-growth ability on illuminated pot plants; especially, 1-(3'-(4″-O-β-d-galactopyranosyl)furyl)-3-(4″-nitrophenyl)-2-en-1-one (B11) had a better herbicidal activity against rapeseed and Chinese amaranth than haloxyfop-R-methyl. The median efficient concentrations (EC50) of compound B11 against cucumber and wheat were 9.55 and 26.97 mg/L, respectively, also showing a stronger suppressing capacity than 2,4-D. Molecular docking with phosphoenolpyruvate carboxylase protein showed a stable binding conformation in which the galactosyl group interacted with LYS363 and GLU369, the furan ring and carbonyl bound with ARG184, and the crosslink of the nitro group with GLU240 formed a salt bridge. The results demonstrate that galactosyl furylchalcones possess the great potential as new herbicides for weed management, and further evaluations on more weeds are required for practical application.
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Affiliation(s)
- Xuefeng Liu
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Yongjun Chen
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Yunfei Deng
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Ciying Xiao
- School of Biochemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Shaorong Luan
- School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qingchun Huang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
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12
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You X, Suo F, Yin S, Wang X, Zheng H, Fang S, Zhang C, Li F, Li Y. Biochar decreased enantioselective uptake of chiral pesticide metalaxyl by lettuce and shifted bacterial community in agricultural soil. JOURNAL OF HAZARDOUS MATERIALS 2021; 417:126047. [PMID: 33992003 DOI: 10.1016/j.jhazmat.2021.126047] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 05/01/2021] [Accepted: 05/03/2021] [Indexed: 06/12/2023]
Abstract
A 35-day microcosmic experiment was conducted with lettuce (Lactuca sativa L.) and two metalaxyl (MET) enantiomers (R-MET and S-MET) to understand the roles of biochar in the enantioselective fate of chiral pesticides in soil-plant ecosystems. Wood waste-derived biochar (WBC) amendment effectively decreased the shoot concentrations of R-MET/S-MET and their metabolites R-MET/S-MET acid by 57.7-86.3% and 13.3-32.5%, respectively. The reduced uptake was mainly attributed to the decreased bioavailability of R-MET and S-MET. A lower fraction of R-MET was accumulated by the lettuce in the WBC-amended soils relative to the control, suggesting a decrease in the enantioselective uptake of the chiral pesticide MET in the presence of biochar. Regardless of the WBC amendment, no enantiomerization of MET or MET acid occurred. The application of WBC stimulated soil bacterial diversity, shifted the bacterial community, and enhanced the abundance of pesticide degrading bacteria (e.g., Luteimonas, Methylophilus, and Hydrogenophaga), which were responsible for the enantioselective degradation of MET in the soil. This work expands our understanding of the enantioselective fate of chiral pesticides in the biochar-amended soil ecosystems. These findings can be used to develop biochar-based technologies to remediate soils contaminated with these chiral pesticides to ensure food safety.
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Affiliation(s)
- Xiangwei You
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Fengyue Suo
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Shaojing Yin
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Xiao Wang
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China; Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266100 China
| | - Hao Zheng
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China; Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266100 China.
| | - Song Fang
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Chengsheng Zhang
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Fengmin Li
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China; Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266100 China
| | - Yiqiang Li
- Marine Agriculture Research Center, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
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13
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Lv M, Chen S, Zhang S, Xu H. Toxicology study of fraxinellone as ovicidal agents against Mythimna separata Walker and Bombyx mori Linaeus. Z NATURFORSCH C 2020; 75:291-295. [PMID: 32568736 DOI: 10.1515/znc-2020-0041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 05/26/2020] [Indexed: 02/07/2023]
Abstract
Fraxinellone is a naturally occurring degraded limonoid isolated from many species of plants in Meliaceae and Rutaceae. Besides structural modification of the lead compounds, the toxicology study of the lead compounds is also a very important procedure to develop insecticidal agents. Herein the toxicology study of fraxinellone was carried out as the ovicidal agent against the eggs of two lepidopteran insects Mythimna separata Walker and Bombyx mori Linaeus. Fraxinellone selectively exhibited an ovicidal activity against the eggs of M. separata. After treatment with fraxinellone, the eggshells of M. separata were shrinked, whereas those of B. mori had no obvious change. The dynamic process of M. separata embryo development demonstrated that the distinct difference between the treated eggs and the control ones was obvious at the second day after treatment, especially, the control embryo finished blastokinesis, whereas the treated ones were still laid at pre-reversion status and a lot of yolk can be seen around the embryo. It ultimately resulted in the eggshell withered and the egg hatching inhibited.
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Affiliation(s)
- Min Lv
- College of Plant Protection, Northwest A&F University, Yangling, 712100, PR China
| | - Suying Chen
- College of Plant Protection, Northwest A&F University, Yangling, 712100, PR China
| | - Shaoyong Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou, 313000, PR China
| | - Hui Xu
- College of Plant Protection, Northwest A&F University, Yangling, 712100, PR China.,Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou, 313000, PR China
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14
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Zheng S, Lin X, Wu H, Zhao C, Xu H. Synthesis, bioactivities and phloem uptake of dipeptide-chlorantraniliprole derivatives. BMC Chem 2020; 14:22. [PMID: 32259134 PMCID: PMC7106865 DOI: 10.1186/s13065-020-00673-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 03/09/2020] [Indexed: 11/10/2022] Open
Abstract
Phloem systemicity is a desirable property for insecticides to control sucking insects. However, the development of phloem systemic insecticides is challenging. One possible strategy is to link existed insecticides with endogenous substances so that the resulting conjugates can be transported by specific transporters into the phloem. In this study, novel dipeptide promoieties were introduced into chlorantraniliprole, which is an efficient and broad-spectrum anthranilic diamide insecticide without phloem mobility. Twenty-two new dipeptide-chlorantraniliprole conjugates have been synthesized. Systemic tests showed that all conjugates exhibited phloem mobility in Ricinus communis. In particular, compound 4g with alanyl-alanine dipeptide fragment was able to accumulate in phloem sap (114.49 ± 11.10 μM) in the form of its hydrolysis product 5g. Results of bioassay showed that conjugates 4g and 5g were able to exhibit comparable insecticidal activity against Plutella xylostella L. and Spodoptera exigua compared to its parent compound chlorantraniliprole. This work demonstrated that the dipeptide structures were able to contribute to the improvement of the uptake and phloem mobility of chlorantraniliprole, and two phloem mobile conjugates with satisfactory in vivo insecticidal effect was obtained as new candidates for high-efficient insecticides.
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Affiliation(s)
- Shijie Zheng
- 1State Key Laboratory for Conservation and Utilization of Subtropical Argo-Bioresources, South China Agricultural University, Guangzhou, Guangdong China.,2Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642 China
| | - Xiaomin Lin
- 1State Key Laboratory for Conservation and Utilization of Subtropical Argo-Bioresources, South China Agricultural University, Guangzhou, Guangdong China.,2Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642 China
| | - Hanxiang Wu
- 1State Key Laboratory for Conservation and Utilization of Subtropical Argo-Bioresources, South China Agricultural University, Guangzhou, Guangdong China.,2Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642 China
| | - Chen Zhao
- 1State Key Laboratory for Conservation and Utilization of Subtropical Argo-Bioresources, South China Agricultural University, Guangzhou, Guangdong China.,2Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642 China
| | - Hanhong Xu
- 1State Key Laboratory for Conservation and Utilization of Subtropical Argo-Bioresources, South China Agricultural University, Guangzhou, Guangdong China.,2Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642 China
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15
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Xiong Y, Zhu X, Hu J, Wang Y, Du X, Li J, Wu Q. Effect of introducing amino acids into phenazine-1-carboxylic acid on phloem mobility. Nat Prod Res 2020; 35:4373-4379. [PMID: 31984778 DOI: 10.1080/14786419.2020.1716347] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
To develop new phenazine carboxylic acid derivatives with better phloem mobility, five novel 7-amino acid substituted phenazine-1-carboxylic acids were synthesised by introducing amino acids into PCA at the 7-position. The phloem mobility experiments in Ricinus communis seedlings showed that retaining the carboxyl group of PCA and conjugating amino acids to its phenazine ring can also endow PCA with phloem mobility. Comparing our previous research, we found the amino acids substituted at 7-position on phenazine ring of PCA could clearly enhance the phloem mobility of PCA than that of amino acids conjugated with carboxyl group. Especially, the phloem transport concentration of the compound 7-L-isoleucine substituted PCA (7d) was 21 times higher than PCA-L-isoleucine conjugate (8d). These data suggest that the introduction of amino acids at different structural sites on the phenazine ring could effectively enhance the phloem mobility of PCA and it is worth a further study.
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Affiliation(s)
- Yongtong Xiong
- School of Agriculture, Yangtze University, Jingzhou, China
| | - Xiang Zhu
- School of Agriculture, Yangtze University, Jingzhou, China.,Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Jinyu Hu
- School of Agriculture, Yangtze University, Jingzhou, China
| | - Yunping Wang
- School of Agriculture, Yangtze University, Jingzhou, China
| | - Xiaoying Du
- School of Agriculture, Yangtze University, Jingzhou, China.,Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Junkai Li
- School of Agriculture, Yangtze University, Jingzhou, China.,Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Qinglai Wu
- School of Agriculture, Yangtze University, Jingzhou, China.,Institute of Pesticides, Yangtze University, Jingzhou, China
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16
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Zhu X, Yu L, Hsiang T, Huang D, Xu Z, Wu Q, Du X, Li J. The influence of steric configuration of phenazine-1-carboxylic acid-amino acid conjugates on fungicidal activity and systemicity. PEST MANAGEMENT SCIENCE 2019; 75:3323-3330. [PMID: 31021517 DOI: 10.1002/ps.5455] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 03/30/2019] [Accepted: 04/25/2019] [Indexed: 05/27/2023]
Abstract
BACKGROUND Conjugating an amino acid onto existing fungicidal parent structures has been demonstrated to be an effective way to endow non-phloem mobile fungicides with phloem mobility. To alter the systemicity of the fungicide PCA (phenazine-1-carboxylic acid), 10 amino acids derivatives of this fungicide were designed and synthesized, and their synthesis, characterization, phloem and xylem mobility in Ricinus communis L, and their fungicidal activity in vitro are described. RESULTS The systemicity experiments in Ricinus communis system demonstrated that all conjugates exhibited obvious phloem mobility compared with non-phloem-mobile PCA, and the introduction of an L-amino acid to PCA more greatly enhanced the phloem mobility. The five D-amino acid conjugates exhibited higher xylem mobility than that of PCA and of each corresponding L-amino acid conjugate. Most conjugates were found to exhibit moderate in vitro fungicidal activities against six pathogenic fungi, which were lower than that of PCA. The results of the bioassay showed fungicidal activities of PCA-amino acid conjugates associated not only with different amino acids, but also with their conformation. Conjugation with D-amino acid contributed to the in vitro fungicidal activities of PCA-amino acid conjugates. CONCLUSIONS The current research offers a new strategy for enhancing the systemicity of non-phloem-mobile fungicides and presents some useful information on the effects of introducing amino acids of different steric configurations on the fungicidal activity, phloem and xylem mobility of the parent fungicide. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Xiang Zhu
- College of Agriculture, Yangtze University, Jingzhou, China
- Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Linhua Yu
- College of Agriculture, Yangtze University, Jingzhou, China
| | - Tom Hsiang
- School of Environmental Sciences, University of Guelph, Guelph, Canada
| | - Di Huang
- College of Agriculture, Yangtze University, Jingzhou, China
| | - Zhihong Xu
- College of Agriculture, Yangtze University, Jingzhou, China
- Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Qinglai Wu
- College of Agriculture, Yangtze University, Jingzhou, China
- Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Xiaoying Du
- College of Agriculture, Yangtze University, Jingzhou, China
- Institute of Pesticides, Yangtze University, Jingzhou, China
| | - Junkai Li
- College of Agriculture, Yangtze University, Jingzhou, China
- Institute of Pesticides, Yangtze University, Jingzhou, China
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17
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Ren Z, Chen Z, Luo X, Su J, Yao G, Xu H, Lin F. Overexpression of AtAAP1 increased the uptake of an alanine-chlorantraniliprole conjugate in Arabidopsis thaliana. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:36680-36687. [PMID: 31741272 DOI: 10.1007/s11356-019-06671-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 10/01/2019] [Indexed: 06/10/2023]
Abstract
Transporters play an important role in the uptake and redistribution of agrochemicals to the site of insect feeding. The product of the Arabidopsis thaliana gene AtAAP1 substantially contributes to inorganic nitrogen acquisition under ecologically relevant amino acid concentrations. Here, the transporter ability of AtAAP1 to a chlorantraniliprole-alanine conjugate (CAP-Ala-1) was tested both in planta and in vitro. Thirty-day-old and 15-day-old plants overexpressing AtAAP1 increased the uptake of CAP-Ala-1 into the roots, whereas AtAAP1 deficiency did not completely block the uptake of CAP-Ala-1. An uptake experiment carried out in Xenopus laevis oocytes expressing AtAAP1 showed that CAP-Ala-1 interacted with AtAAP1. Although little native AtAAP1 transcription was present in the leaves, constitutive expression of AtAAP1 in plants significantly increased the ability of the leaf mesophyll protoplasts to take up CAP-Ala-1. The observations supported the possibility of exploiting AtAAP1 as a component of a novel delivery and redistribution system for amino acid-based pesticide conjugates.
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Affiliation(s)
- Zhanfu Ren
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, Guangdong, China
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Zhiting Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, Guangdong, China
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Xiao Luo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, Guangdong, China
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Jiebing Su
- Guangdong Eco-engineering Polytechnic, Guangzhou, 510520, Guangdong, China
| | - Guangkai Yao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, Guangdong, China
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Hanhong Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, Guangdong, China.
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China.
| | - Fei Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, Guangdong, China.
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China.
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18
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Zhao Q, Sun R, Liu Y, Chen P, Li Y, Yang S, Wang Q. Synthesis and insecticidal activity studies of novel phenylpyrazole derivatives containing arylimine or carbimidate moiety. Bioorg Med Chem 2019; 27:115092. [PMID: 31521460 DOI: 10.1016/j.bmc.2019.115092] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/18/2019] [Accepted: 09/06/2019] [Indexed: 12/30/2022]
Abstract
Phenylpyrazole insecticides are successful for crop protection and public hygiene by blocking gamma-aminobutyric acid (GABA)-gated chloride channels and glutamate-gated chloride (GluCl) channels. A series of novel phenylpyrazoles containing arylimine or 1-methoxyaryl groups were designed and synthesized. The addition reaction of methanol to the imines 1-11 was investigated and the cayno addition products 13-15 were obtained. The compounds 1-15 were confirmed by 1H NMR and elemental analysis. The results of bioassay indicated that some compounds exhibited comparable bioactivity to fipronil against a broad spectrum of insects such as bean aphid (Aphis craccivora), mosquito (Culex pipiens pallens), diamondback moth (Plutella xylostella) and Oriental armyworm (Mythimna separata). Especially, the foliar contact activity against bean aphid of compound 7 at 10 µg mL-1 was 68%, the larvacidal activity against mosquito of compounds 5, 13 and 15 at 0.0025 µg mL-1 was 100%, the larvacidal activity against diamondback moth of compounds 9 and 11 at 0.05 µg mL-1 was 100%, the larvacidal activity against Oriental armyworm of compound 9 at 1 µg mL-1 was 100%. The 3-cayno moiety on pyrazole ring was essential for the high insecticidal activities against bean aphid, diamondback moth and Oriental armyworm, while the 3-carbimidate moiety on pyrazole ring was crucial to the excellent high insecticidal activities against mosquito.
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Affiliation(s)
- Qiqi Zhao
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China; Patent Examination Cooperation Center of the Patent Office, SIPO, Beijing 100081, People's Republic of China
| | - Ranfeng Sun
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Ministry of Education, College of Plant Protection, Hainan University, Haikou 570228, People's Republic of China.
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China
| | - Peiqi Chen
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Ministry of Education, College of Plant Protection, Hainan University, Haikou 570228, People's Republic of China
| | - Yongqiang Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China.
| | - Shaoxiang Yang
- Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100081, People's Republic of China.
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China.
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19
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Wu H, Xu H, Marivingt-Mounir C, Bonnemain JL, Chollet JF. Vectorizing agrochemicals: enhancing bioavailability via carrier-mediated transport. PEST MANAGEMENT SCIENCE 2019; 75:1507-1516. [PMID: 30537141 DOI: 10.1002/ps.5298] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 11/14/2018] [Accepted: 11/30/2018] [Indexed: 05/02/2023]
Abstract
Systemicity of agrochemicals is an advantageous property for controlling phloem sucking insects, as well as pathogens and pests not accessible to contact products. After the penetration of the cuticle, the plasma membrane constitutes the main barrier to the entry of an agrochemical into the sap flow. The current strategy for developing systemic agrochemicals is to optimize the physicochemical properties of the molecules so that they can cross the plasma membrane by simple diffusion or ion trapping mechanisms. The main problem with current systemic compounds is that they move everywhere within the plant, and this non-controlled mobility results in the contamination of the plant parts consumed by vertebrates and pollinators. To achieve the site-targeted distribution of agrochemicals, a carrier-mediated propesticide strategy is proposed in this review. After conjugating a non-systemic agrochemical with a nutrient (α-amino acids or sugars), the resulting conjugate may be actively transported across the plasma membrane by nutrient-specific carriers. By applying this strategy, non-systemic active ingredients are expected to be delivered into the target organs of young plants, thus avoiding or minimizing subsequent undesirable redistribution. The development of this innovative strategy presents many challenges, but opens up a wide range of exciting possibilities. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Hanxiang Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Hanhong Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Cécile Marivingt-Mounir
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), Unité Mixte de Recherche CNRS 7285, Université de Poitiers, Poitiers Cedex 9, France
| | - Jean-Louis Bonnemain
- Laboratoire Écologie et Biologie des Interactions, Unité Mixte de Recherche CNRS 7267, Université de Poitiers, Poitiers Cedex 9, France
| | - Jean-François Chollet
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), Unité Mixte de Recherche CNRS 7285, Université de Poitiers, Poitiers Cedex 9, France
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Gierer F, Vaughan S, Slater M, Thompson HM, Elmore JS, Girling RD. A review of the factors that influence pesticide residues in pollen and nectar: Future research requirements for optimising the estimation of pollinator exposure. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 249:236-247. [PMID: 30893636 DOI: 10.1016/j.envpol.2019.03.025] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 03/07/2019] [Accepted: 03/08/2019] [Indexed: 06/09/2023]
Abstract
In recent years, the impact of Plant Protection Products (PPPs) on insect pollinator decline has stimulated significant amounts of research, as well as political and public interest. PPP residues have been found in various bee-related matrices, resulting in governmental bodies worldwide releasing guidance documents on methods for the assessment of the overall risk of PPPs to different bee species. An essential part of these risk assessments are PPP residues found in pollen and nectar, as they represent a key route of exposure. However, PPP residue values in these matrices exhibit large variations and are not available for many PPPs and crop species combinations, which results in inaccurate estimations and uncertainties in risk evaluation. Additionally, residue studies on pollen and nectar are expensive and practically challenging. An extrapolation between different cropping scenarios and PPPs is not yet justified, as the behaviour of PPPs in pollen and nectar is poorly understood. Therefore, this review aims to contribute to a better knowledge and understanding of the fate of PPP residues in pollen and nectar and to outline knowledge gaps and future research needs. The literature suggests that four primary factors, the crop type, the application method, the physicochemical properties of a compound and the environmental conditions have the greatest influence on PPP residues in pollen and nectar. However, these factors consist of many sub-factors and initial effects may be disguised by different sampling methodologies, impeding their exact characterisation. Moreover, knowledge about these factors is ambiguous and restricted to a few compounds and plant species. We propose that future research should concentrate on identifying relationships and common features amongst various PPP applications and crops, as well as an overall quantification of the described parameters; in order to enable a reliable estimation of PPP residues in pollen, nectar and other bee matrices.
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Affiliation(s)
- Fiona Gierer
- School of Agriculture, Policy and Development, University of Reading, Reading, UK.
| | - Sarah Vaughan
- Syngenta Ltd, Jealott's Hill International Research Centre, Bracknell, Berkshire, UK
| | - Mark Slater
- Syngenta Ltd, Jealott's Hill International Research Centre, Bracknell, Berkshire, UK
| | - Helen M Thompson
- Syngenta Ltd, Jealott's Hill International Research Centre, Bracknell, Berkshire, UK
| | - J Stephen Elmore
- Department of Food and Nutritional Sciences, University of Reading, Reading, UK
| | - Robbie D Girling
- School of Agriculture, Policy and Development, University of Reading, Reading, UK
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Design, Synthesis, Phloem Mobility, and Bioactivities of a Series of Phenazine-1-Carboxylic Acid-Amino Acid Conjugates. Molecules 2018; 23:molecules23092139. [PMID: 30149611 PMCID: PMC6225111 DOI: 10.3390/molecules23092139] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 08/20/2018] [Accepted: 08/23/2018] [Indexed: 11/17/2022] Open
Abstract
Developing fungicides with phloem mobility that can be applied to leaves to control root or vascular pathogens has long been desirable. To achieve this goal, an efficient and economical strategy involves introducing an amino acid into the existing highly active parent pesticide molecule. Hence, 12 L-phenazine-1-carboxylic acid (PCA)-amino acid conjugates 4a⁻l were designed and synthesized via a simple synthetic route. In vitro bioassays results showed that all synthesized compounds 4a⁻l exhibited certain fungicidal activities against six tested fungi. Compound 4c exhibited relatively good fungicidal activity against Rhizoctonia solani, and the EC50 value was 0.084 ± 0.006 mmol/L. The phloem mobility experiments revealed that introducing an amino acid to PCA could effectively endow PCA with phloem mobility in R. communis L. Among them, nine conjugates were found in phloem sap, and L-PCA-Valine 4d exhibited the highest phloem mobility. Analysis results from the prediction of the Kleier model indicated that an active carrier-mediated mechanism may be involved in L-PCA-amino acid conjugates-a result that needs to be confirmed and complemented with further tests. The current research provides useful data for modifying non-phloem-mobile fungicidal molecules to phloem-mobile types.
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Jiang X, Xie Y, Ren Z, Ganeteg U, Lin F, Zhao C, Xu H. Design of a New Glutamine-Fipronil Conjugate with α-Amino Acid Function and Its Uptake by A. thaliana Lysine Histidine Transporter 1 ( AtLHT1). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:7597-7605. [PMID: 29944366 DOI: 10.1021/acs.jafc.8b02287] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Creating novel pesticides with phloem mobility is essential for controlling insects in vascular tissue and root, and conjugating existing pesticides with amino acid is an effective approach. In order to obtain a highly phloem-mobile candidate for efficient pesticides, an electro-neutral l-glutamine-fipronil conjugate (l-GlnF) retaining α-amino acid function was designed and synthesized to fit the substrate specificity of an amino acid transporter. Cotyledon uptake and phloem loading tests with Ricinus communis have verified that l-GlnF was phloem mobile, and its phloem mobility was higher than that of its enantiomer d-GlnF and other previously reported amino acid-fipronil conjugates. Inhibition experiments then suggested that the uptake of l-GlnF was, at least partially, mediated by an active transport mechanism. This inference was further strengthened by assimilation experiments with Xenopus oocytes and genetically modified Arabidopsis thaliana, which showed a direct correlation between the uptake of l-GlnF and the expression of amino acid transporter AtLHT1. Thus, conjugation with l-Gln appears to be a potential strategy to ensure the uptake of pesticides via an endogenous amino acid transport system.
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Affiliation(s)
- Xunyuan Jiang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education , South China Agricultural University , Guangzhou 510642 , China
| | - Yun Xie
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education , South China Agricultural University , Guangzhou 510642 , China
| | - Zhanfu Ren
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education , South China Agricultural University , Guangzhou 510642 , China
| | - Ulrika Ganeteg
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology , Swedish University of Agricultural Sciences , SE-901 83 Umeå , Sweden
| | - Fei Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education , South China Agricultural University , Guangzhou 510642 , China
| | - Chen Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education , South China Agricultural University , Guangzhou 510642 , China
| | - Hanhong Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education , South China Agricultural University , Guangzhou 510642 , China
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Wu H, Marhadour S, Lei ZW, Yang W, Marivingt-Mounir C, Bonnemain JL, Chollet JF. Vectorization of agrochemicals: amino acid carriers are more efficient than sugar carriers to translocate phenylpyrrole conjugates in the Ricinus system. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:14336-14349. [PMID: 27966081 DOI: 10.1007/s11356-016-8107-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 11/14/2016] [Indexed: 06/06/2023]
Abstract
Producing quality food in sufficient quantity while using less agrochemical inputs will be one of the great challenges of the twenty-first century. One way of achieving this goal is to greatly reduce the doses of plant protection compounds by improving the targeting of pests to eradicate. Therefore, we developed a vectorization strategy to confer phloem mobility to fenpiclonil, a contact fungicide from the phenylpyrrole family used as a model molecule. It consists in coupling the antifungal compound to an amino acid or a sugar, so that the resulting conjugates are handled by active nutrient transport systems. The method of click chemistry was used to synthesize three conjugates combining fenpiclonil to glucose or glutamic acid with a spacer containing a triazole ring. Systemicity tests with the Ricinus model have shown that the amino acid promoiety was clearly more favorable to phloem mobility than that of glucose. In addition, the transport of the amino acid conjugate is carrier mediated since the derivative of the L series was about five times more concentrated in the phloem sap than its counterpart of the D series. The systemicity of the L-derivative is pH dependent and almost completely inhibited by the protonophore carbonyl cyanide 3-chlorophenylhydrazone (CCCP). These data suggest that the phloem transport of the L-derivative is governed by a stereospecific amino acid carrier system energized by the proton motive force.
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Affiliation(s)
- Hanxiang Wu
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), Unité Mixte de Recherche CNRS 7285, Université de Poitiers, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 9, France
- Laboratoire Écologie et Biologie des Interactions, Unité Mixte de Recherche CNRS 7267, Université de Poitiers, 3 rue Jacques Fort, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Sophie Marhadour
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), Unité Mixte de Recherche CNRS 7285, Université de Poitiers, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Zhi-Wei Lei
- Guizhou Tea Reasearch Institute, Guizhou Academy of Agricultural Science, Guiyang, Guizhou, 550009, China
| | - Wen Yang
- Guizhou Tea Reasearch Institute, Guizhou Academy of Agricultural Science, Guiyang, Guizhou, 550009, China
| | - Cécile Marivingt-Mounir
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), Unité Mixte de Recherche CNRS 7285, Université de Poitiers, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Jean-Louis Bonnemain
- Laboratoire Écologie et Biologie des Interactions, Unité Mixte de Recherche CNRS 7267, Université de Poitiers, 3 rue Jacques Fort, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Jean-François Chollet
- Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), Unité Mixte de Recherche CNRS 7285, Université de Poitiers, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 9, France.
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Sheng Q, Liu X, Xie Y, Lin F, Zhang Z, Zhao C, Xu H. Synthesis of Novel Amino Acid-Fipronil Conjugates and Study on Their Phloem Loading Mechanism. Molecules 2018; 23:molecules23040778. [PMID: 29597301 PMCID: PMC6017586 DOI: 10.3390/molecules23040778] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 03/15/2018] [Accepted: 03/21/2018] [Indexed: 01/02/2023] Open
Abstract
To develop a new pesticide with phloem mobility, a series of new amino acid–fipronil conjugates were designed and synthesized based on derivatization at the 3-position of the pyrazole ring of fipronil. Experiments using a Ricinus communis seedling system showed that all tested conjugates were phloem mobile except for the isoleucine–fipronil conjugate, and that the serine–fipronil conjugate (4g) exhibited the highest concentration in phloem sap (52.00 ± 5.80 μM). According to prediction with log Cf values and uptake experiments with Xenopus oocytes, the phloem loading process of conjugate 4g involved both passive diffusion and an active carrier system (RcANT15). In particular, compared with for a previously reported glycinergic–fipronil conjugate (GlyF), passive diffusion played a more important role for conjugate 4g in the enhancement of phloem mobility. This study suggests that associating a nutrient at a different position of an existing pesticide structure could still be effective in obtaining phloem-mobile derivatives, but the distinct physicochemical properties of resultant conjugates may lead to different phloem loading mechanisms.
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Affiliation(s)
- Qingqing Sheng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China.
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, China.
| | - Xinxin Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China.
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, China.
| | - Yun Xie
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China.
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, China.
| | - Fei Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China.
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, China.
| | - Zhixiang Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China.
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, China.
| | - Chen Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China.
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, China.
| | - Hanhong Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China.
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, China.
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Wu H, Marhadour S, Lei ZW, Dugaro É, Gaillard C, Porcheron B, Marivingt-Mounir C, Lemoine R, Chollet JF, Bonnemain JL. Use of D-glucose-fenpiclonil conjugate as a potent and specific inhibitor of sucrose carriers. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:5599-5613. [PMID: 29088431 PMCID: PMC5853465 DOI: 10.1093/jxb/erx354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 09/25/2017] [Indexed: 05/12/2023]
Abstract
Until now, specific inhibitors of sucrose carriers were not available. This led us to study the properties of the recently synthesized D-glucose-fenpiclonil conjugate (D-GFC). This large amphiphilic glucoside exhibited an extremely low phloem systemicity in contrast to L-amino acid-fenpiclonil conjugates. Using Ricinus seedlings, the effect of D-GFC on 0.5 mM [14C]sucrose (Suc), 3-O-[3H]methylglucose, and [3H]glutamine uptake by cotyledon tissues was compared with that of p-chloromercuribenzenesulfonic acid (PCMBS). D-GFC dramatically inhibited H+-Suc symport at the same concentrations as PCMBS (0.5 and 1 mM), but in contrast to the thiol reagent, it did not affect 3-O-methylglucose and glutamine transport, nor the acidification of the incubation medium by cotyledon tissues. Similarly, 0.5 mM D-GFC inhibited active Suc uptake by Vicia faba leaf tissues and by Saccharomyces cerevisiae cells transformed with AtSUC2, a gene involved in Suc phloem loading in Arabidopsis, by approximately 80%. The data indicated that D-GFC was a potent inhibitor of Suc uptake from the endosperm and of Suc phloem loading. It is the first chemical known to exhibit such specificity, at least in Ricinus, and this property permitted the quantification of the two routes involved in phloem loading of endogenous sugars after endosperm removal.
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Affiliation(s)
- Hanxiang Wu
- Laboratoire EBI (Écologie et Biologie des Interactions), UMR CNRS 7267, Équipe SEVE (Sucres, Échanges Végétaux, Environnement), Université de Poitiers, 3 rue Jacques Fort, Poitiers cedex, France
- IC2MP (Institut de Chimie des Milieux et des Matériaux de Poitiers), UMR CNRS 7285, Université de Poitiers, 4 rue Michel Brunet, TSA, Poitiers cedex, France
| | - Sophie Marhadour
- IC2MP (Institut de Chimie des Milieux et des Matériaux de Poitiers), UMR CNRS 7285, Université de Poitiers, 4 rue Michel Brunet, TSA, Poitiers cedex, France
| | - Zhi-Wei Lei
- Guizhou Tea Reasearch Institute, Guizhou Academy of Agricultural Science, Guiyang, Guizhou, China
| | - Émilie Dugaro
- IC2MP (Institut de Chimie des Milieux et des Matériaux de Poitiers), UMR CNRS 7285, Université de Poitiers, 4 rue Michel Brunet, TSA, Poitiers cedex, France
| | - Cécile Gaillard
- Laboratoire EBI (Écologie et Biologie des Interactions), UMR CNRS 7267, Équipe SEVE (Sucres, Échanges Végétaux, Environnement), Université de Poitiers, 3 rue Jacques Fort, Poitiers cedex, France
| | - Benoit Porcheron
- Laboratoire EBI (Écologie et Biologie des Interactions), UMR CNRS 7267, Équipe SEVE (Sucres, Échanges Végétaux, Environnement), Université de Poitiers, 3 rue Jacques Fort, Poitiers cedex, France
| | - Cécile Marivingt-Mounir
- IC2MP (Institut de Chimie des Milieux et des Matériaux de Poitiers), UMR CNRS 7285, Université de Poitiers, 4 rue Michel Brunet, TSA, Poitiers cedex, France
| | - Rémi Lemoine
- Laboratoire EBI (Écologie et Biologie des Interactions), UMR CNRS 7267, Équipe SEVE (Sucres, Échanges Végétaux, Environnement), Université de Poitiers, 3 rue Jacques Fort, Poitiers cedex, France
| | - Jean-François Chollet
- IC2MP (Institut de Chimie des Milieux et des Matériaux de Poitiers), UMR CNRS 7285, Université de Poitiers, 4 rue Michel Brunet, TSA, Poitiers cedex, France
| | - Jean-Louis Bonnemain
- Laboratoire EBI (Écologie et Biologie des Interactions), UMR CNRS 7267, Équipe SEVE (Sucres, Échanges Végétaux, Environnement), Université de Poitiers, 3 rue Jacques Fort, Poitiers cedex, France
- Correspondence:
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Niu J, Nie D, Yu D, Wu Q, Yu L, Yao Z, Du X, Li J. Synthesis, fungicidal activity and phloem mobility of phenazine-1-carboxylic acid-alanine conjugates. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 143:8-13. [PMID: 29183614 DOI: 10.1016/j.pestbp.2017.10.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 09/14/2017] [Accepted: 10/15/2017] [Indexed: 05/08/2023]
Abstract
Phenazine-1-carboxylic acid (PCA) is a natural product that has been proven effective against a number of soil-borne fungal phytopathogens and registered for biofungicide against rice sheath blight in China. In order to improve the phloem mobility of phenazine-1-carboxylic acid (PCA), four PCA derivatives were designed and synthesized by conjugating PCA with l-alanine methyl ester, d-alanine methyl ester, l-alanine and d-alanine respectively. In vitro and planta bioassays results showed that conjugates L-PAM and D-PAM exhibited higher fungicidal activities against Rhizoctonia solani Kuhn than PCA while L-PA and D-PA were less active than PCA. The concentration of conjugates in Ricinus communis phloem sap was determined by HPLC. The results showed that only L-PA exhibited phloem mobility among these conjugates, and its concentration in Ricinus communis phloem sap increased with the increase of time (the maximum concentration was 12.69μM within 5h). However, the results of pot experiments showed that L-PA and other conjugates didn't exhibited the inhibition for the growth of Rhizoctonia solani Kuhn in the lower leaves after treatment in the upper leaves of rice seedlings. This may be due to the poor plant absorbility for them or their too little amount of accumulation in the lower leaves.
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Affiliation(s)
- Junfan Niu
- Agricultural School, Yangtze University, Jingzhou, Hubei 434025, PR China
| | - Danyue Nie
- Agricultural School, Yangtze University, Jingzhou, Hubei 434025, PR China
| | - Diya Yu
- Agricultural School, Yangtze University, Jingzhou, Hubei 434025, PR China
| | - Qinglai Wu
- Agricultural School, Yangtze University, Jingzhou, Hubei 434025, PR China
| | - Linhua Yu
- Agricultural School, Yangtze University, Jingzhou, Hubei 434025, PR China
| | - Zongli Yao
- Agricultural School, Yangtze University, Jingzhou, Hubei 434025, PR China
| | - Xiaoying Du
- Agricultural School, Yangtze University, Jingzhou, Hubei 434025, PR China.
| | - Junkai Li
- Agricultural School, Yangtze University, Jingzhou, Hubei 434025, PR China.
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Yao G, Wen Y, Zhao C, Xu H. Novel amino acid ester-chlorantraniliprole conjugates: design, synthesis, phloem accumulation and bioactivity. PEST MANAGEMENT SCIENCE 2017; 73:2131-2137. [PMID: 28432729 DOI: 10.1002/ps.4592] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Revised: 03/27/2017] [Accepted: 04/18/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Conjugating amino acid and glucose fragments with existing pesticide structures has been shown to be an effective way to introduce phloem mobility into non-phloem mobile species. However, the resulting derivatives always suffer from lower bioactivity compared with their parent compound. To solve this problem, we designed and synthesised a series of ester-capped amino-acid-conjugated chlorantraniliproles. RESULTS The systemic test showed that all conjugates exhibited excellent phloem mobility and xylem mobility in a Ricinus communis model. In particular, compounds 7b, 8b and 8c were able to accumulate in phloem tissues in the form of their hydrolysis products, and the concentrations in phloem sap can reach 3 times the concentration in the incubation medium. Although their insecticidal activity (LC50 ) against the beet armyworm (Spodoptera exigua) in vitro was weaker than that of chlorantraniliprole, compounds 7b, 8b and 8c showed similar insecticidal activity in vivo against beet armyworm compared with the parent compound. CONCLUSIONS This work provides a potential strategy to obtain pesticide derivatives that possess both improved uptake and improved mobility in crops while retaining the in vivo insecticidal effect of the parent compound. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Guangkai Yao
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, Guangdong, China
- Key Laboratory of Natural Pesticide and Chemical Biology, South China Agricultural University, Guangzhou, Guangdong, China
| | - Yingjie Wen
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, Guangdong, China
- Key Laboratory of Natural Pesticide and Chemical Biology, South China Agricultural University, Guangzhou, Guangdong, China
| | - Chen Zhao
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, Guangdong, China
- Key Laboratory of Natural Pesticide and Chemical Biology, South China Agricultural University, Guangzhou, Guangdong, China
| | - Hanhong Xu
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, Guangdong, China
- Key Laboratory of Natural Pesticide and Chemical Biology, South China Agricultural University, Guangzhou, Guangdong, China
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Marhadour S, Wu H, Yang W, Marivingt-Mounir C, Bonnemain JL, Chollet JF. Vectorisation of agrochemicals via amino acid carriers: influence of the spacer arm structure on the phloem mobility of phenylpyrrole conjugates in the Ricinus system. PEST MANAGEMENT SCIENCE 2017; 73:1972-1982. [PMID: 28321972 DOI: 10.1002/ps.4575] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 03/15/2017] [Accepted: 03/16/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND Excessive agrochemical use poses significant threats to environmental safety and human health. Reducing pesticide use without reducing yield is necessary for sustainable agriculture. Therefore, we developed a vectorisation strategy to enhance agrochemical delivery through plant amino acid carriers. RESULTS In addition to a fenpiclonil conjugate recently described, three new amino acid conjugates were synthesised by coupling fenpiclonil to an l-α-amino acid. Phloem mobility of these conjugates, which exhibit different structures of the spacer arm introduced between fenpiclonil and the α-amino acid function, was studied using the Ricinus model. Conjugate L-14, which contains a triazole ring with the shortest amino acid chain, showed the best phloem systemicity among the four conjugates. By contrast, removing the triazole ring in the spacer arm did not improve systemicity. L-14 exhibited phloem systemicity at all reported pH values (pH values from 5.0 to 6.5) of the foliar apoplast, while acidic derivatives of fenpiclonil were translocated only at pH values near 5.0. CONCLUSION The conjugates were recognised by a pH-dependent transporter system and translocated at distance in the phloem. They exhibited a broader phloem systemicity than fenpiclonil acidic derivatives within the pH value range of the foliar apoplast. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Sophie Marhadour
- Institut de Chimie des Milieux et des Matériaux de Poitiers, Université de Poitiers, Poitiers, France
| | - Hanxiang Wu
- Institut de Chimie des Milieux et des Matériaux de Poitiers, Université de Poitiers, Poitiers, France
- Laboratoire Écologie et Biologie des Interactions, Université de Poitiers, Poitiers, France
| | - Wen Yang
- Guizhou Tea Reasearch Institute, Guizhou Academy of Agricultural Science, Guiyang, Guizhou, China
| | - Cécile Marivingt-Mounir
- Institut de Chimie des Milieux et des Matériaux de Poitiers, Université de Poitiers, Poitiers, France
| | - Jean-Louis Bonnemain
- Laboratoire Écologie et Biologie des Interactions, Université de Poitiers, Poitiers, France
| | - Jean-François Chollet
- Institut de Chimie des Milieux et des Matériaux de Poitiers, Université de Poitiers, Poitiers, France
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Yang W, Chen Y, Zhang Y, Gao XB, Zhou YF. Effects of introducing theanine or glutamic acid core to tralopyril on systemicity and insecticidal activity. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 141:29-40. [PMID: 28911738 DOI: 10.1016/j.pestbp.2016.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 10/31/2016] [Accepted: 11/13/2016] [Indexed: 06/07/2023]
Abstract
Tralopyril was the active agent of a pro-insecticide chlorfenapyr. To simultaneously solve the problems of the phytotoxicity and non-systemic insecticidal activity of tralopyril, four new tralopyril conjugates containing theanine or glutamic acid moieties were designed and synthesized. Their phytotoxicity to tea shoot, phloem systemicity, and insecticidal activity were evaluated. Phytotoxic symptoms were not observed after the tea shoots were exposed to the four conjugates at concentrations of 2mM. The phloem mobility test on Ricinus communis L. seedlings confirmed that all four conjugates were mobile in the sieve tubes. Results of insecticidal activity against the third-instar larvae of Plutella xylostella showed that only conjugate 20 exhibited activity with an LC50 value of 0.5882±0.0504mM. After root application to tea seedlings, conjugate 20 showed obviously systemic insecticidal activity against Dendrothrips minowai Priesner, while chlorfenapyr showed no attribute of that. A new conjugate as potential phloem mobile pro-insecticide candidate was provided and so a novel strategy of pro-insecticide for improved phloem systemicity was proposed.
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Affiliation(s)
- Wen Yang
- Guizhou Tea Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, 550006, China
| | - Yao Chen
- Guizhou Tea Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, 550006, China; Institute of Entomology, Guizhou University, Guiyang, Guizhou, 550025, China; GuizhouProvincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Ying Zhang
- Guizhou institute of plant protection, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, 550006, China
| | - Xiu-Bing Gao
- Guizhou Tea Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, 550006, China
| | - Yu-Feng Zhou
- Guizhou Tea Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou, 550006, China.
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Huang X, Zhang B, Xu H. Synthesis of some monosaccharide-related ester derivatives as insecticidal and acaricidal agents. Bioorg Med Chem Lett 2017; 27:4336-4340. [DOI: 10.1016/j.bmcl.2017.08.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 08/12/2017] [Accepted: 08/14/2017] [Indexed: 12/13/2022]
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Tong Y, Wu Y, Zhao C, Xu Y, Lu J, Xiang S, Zong F, Wu X. Polymeric Nanoparticles as a Metolachlor Carrier: Water-Based Formulation for Hydrophobic Pesticides and Absorption by Plants. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7371-7378. [PMID: 28783335 DOI: 10.1021/acs.jafc.7b02197] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Pesticide formulation is highly desirable for effective utilization of pesticide and environmental pollution reduction. Studies of pesticide delivery system such as microcapsules are developing prosperously. In this work, we chose polymeric nanoparticles as a pesticide delivery system and metolachlor was used as a hydrophobic pesticide model to study water-based mPEG-PLGA nanoparticle formulation. Preparation, characterization results showed that the resulting nanoparticles enhanced "water solubility" of hydrophobic metolachlor and contained no organic solvent or surfactant, which represent one of the most important sources of pesticide pollution. After the release study, absorption of Cy5-labeled nanoparticles into rice roots suggested a possible transmitting pathway of this metolachlor formulation and increased utilization of metolachlor. Furthermore, the bioassay test demonstrated that this nanoparticle showed higher effect than non-nano forms under relatively low concentrations on Oryza sativa, Digitaria sanguinalis. In addition, a simple cytotoxicity test involving metolachlor and metolachlor-loaded nanoparticles was performed, indicating toxicity reduction of the latter to the preosteoblast cell line. All of these results showed that those polymeric nanoparticles could serve as a pesticide carrier with lower environmental impact, comparable effect, and effective delivery.
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Affiliation(s)
- Yujia Tong
- College of Science, China Agricultural University , 2 Yuanmingyuan West Road, Beijing 100083, China
| | - Yan Wu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST) , 11 Beiyitiao, Zhongguancun, Beijing 100190, China
| | - Caiyan Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST) , 11 Beiyitiao, Zhongguancun, Beijing 100190, China
| | - Yong Xu
- College of Science, China Agricultural University , 2 Yuanmingyuan West Road, Beijing 100083, China
| | - Jianqing Lu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST) , 11 Beiyitiao, Zhongguancun, Beijing 100190, China
| | - Sheng Xiang
- College of Science, China Agricultural University , 2 Yuanmingyuan West Road, Beijing 100083, China
| | - Fulin Zong
- Institute for the Control of Agrochemicals, Ministry of Agriculture , Beijing 100125, China
| | - Xuemin Wu
- College of Science, China Agricultural University , 2 Yuanmingyuan West Road, Beijing 100083, China
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Mao GL, Yan Y, Chen Y, Wang BF, Xu FF, Zhang ZX, Lin F, Xu HH. Family of Ricinus communis Monosaccharide Transporters and RcSTP1 in Promoting the Uptake of a Glucose-Fipronil Conjugate. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:6169-6178. [PMID: 28692262 DOI: 10.1021/acs.jafc.7b02044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Enhancing the systemic distribution of a bioactive compound by exploiting the vascular transport system of a plant presents a means of reducing both the volume and frequency of pesticide/fungicide application. The foliar uptake of the glucose-fipronil conjugate N-[3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[(trifluoromethyl)sulfinyl]-1H-pyrazol-5-yl]-1-(β-d-glucopyranosyl)-1H-1,2,3-triazole-4-methanamine (GTF) achieved in castor bean (Ricinus communis) and its transport via the phloem are known to be mediated by monosaccharide transporter(s) [MST(s)], although neither the identity of the key MST(s) involved nor the mechanistic basis of its movement have yet to be described. On the basis of homology with Arabidopsis thaliana sugar transporters, the castor bean genome was concluded to harbor 53 genes encoding a sugar transporter, falling into the eight previously defined subfamilies INT, PMT, VGT, STP, ERD6, pGlucT, TMT, and SUT. Transcriptional profiling identified the product of RcSTP1 as a candidate for mediating GTF uptake, because this gene was induced by exposure of the plant to GTF. When RcSTP1 was transiently expressed in onion epidermis cells, the site of RcSTP1 deposition was shown to be the plasma membrane. A functional analysis based on RcSTP1 expression in Xenopus laevis oocytes demonstrated that its product has a high affinity for GTF. The long-distance root-to-shoot transport of GTF was enhanced in a transgenic soybean chimera constitutively expressing RcSTP1.
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Affiliation(s)
- Gen-Lin Mao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Yin Yan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Yan Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Bing-Feng Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Fei-Fei Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Zhi-Xiang Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Fei Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Han-Hong Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
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Influence of Pyranose and Spacer Arm Structures on Phloem Mobility and Insecticidal Activity of New Tralopyril Derivatives. Molecules 2017; 22:molecules22071058. [PMID: 28672840 PMCID: PMC6152327 DOI: 10.3390/molecules22071058] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 06/20/2017] [Accepted: 06/20/2017] [Indexed: 02/06/2023] Open
Abstract
Six new conjugates were designed and synthesized by introducing glucose, methyl glucuronate or glucuronic acid moieties on tralopyril. Phytotoxicity and phloem mobility results demonstrated that the introduction of glucose, methyl glucuronate or glucuronic acid moieties can simultaneously solve the tough phytotoxicity problem and phloem mobility transformation of tralopyril. Conjugates 12 and 18 containing the glucuronic acid moiety exhibited higher phloem mobility than conjugates 9, 11, 15 and 17. Conjugates 15, 17 and 18 with methoxymethyl groups on the tralopyril pyrrole nitrogen atom showed activity against Plutella xylostella, while conjugates 9, 11 and 12 with a methene group on the pyrrole N showed no activity. Cabbage roots were incubated in a buffered solution containing conjugates 15, 17 and 18 at 4 mM for 72 h. Only 18 showed systemic insecticidal activity with 100% mortalityagainst P. xylostella, while 15 and 17 showed lower activity andchlorfenapyr showed no activity. The glucuronic acid promoiety imparted more phloem mobility to tralopyril than glucose and methyl glucuronate. The methoxymethyl group bond on the tralopyril skeleton was the key factor in determining the insecticidal activity of the conjugates. A promising systemic proinsecticide containing glucuronic acid and tralopyril moieties was proposed.
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Vryzas Z. The Plant as Metaorganism and Research on Next-Generation Systemic Pesticides - Prospects and Challenges. Front Microbiol 2016; 7:1968. [PMID: 28018306 PMCID: PMC5161002 DOI: 10.3389/fmicb.2016.01968] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/24/2016] [Indexed: 12/14/2022] Open
Abstract
Systemic pesticides (SPs) are usually recommended for soil treatments and as seed coating agents and are taken up from the soil by involving various plant-mediated processes, physiological, and morphological attributes of the root systems. Microscopic insights and next-generation sequencing combined with bioinformatics allow us now to identify new functions and interactions of plant-associated bacteria and perceive plants as meta-organisms. Host symbiotic, rhizo-epiphytic, endophytic microorganisms and their functions on plants have not been studied yet in accordance with uptake, tanslocation and action of pesticides. Root tips exudates mediated by rhizobacteria could modify the uptake of specific pesticides while bacterial ligands and enzymes can affect metabolism and fate of pesticide within plant. Over expression of specific proteins in cell membrane can also modify pesticide influx in roots. Moreover, proteins and other membrane compartments are usually involved in pesticide modes of action and resistance development. In this article it is discussed what is known of the physiological attributes including apoplastic, symplastic, and trans-membrane transport of SPs in accordance with the intercommunication dictated by plant-microbe, cell to cell and intracellular signaling. Prospects and challenges for uptake, translocation, storage, exudation, metabolism, and action of SPs are given through the prism of new insights of plant microbiome. Interactions of soil applied pesticides with physiological processes, plant root exudates and plant microbiome are summarized to scrutinize challenges for the next-generation pesticides.
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Affiliation(s)
- Zisis Vryzas
- Laboratory of Agricultural Pharmacology and Ecotoxicology, Department of Agricultural Development, Democritus University of ThraceOrestias, Greece
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35
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Synthesis and bioactivities of amino acid ester conjugates of phenazine-1-carboxylic acid. Bioorg Med Chem Lett 2016; 26:5384-5386. [DOI: 10.1016/j.bmcl.2016.10.044] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 09/30/2016] [Accepted: 10/14/2016] [Indexed: 11/23/2022]
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Xie Y, Zhao JL, Wang CW, Yu AX, Liu N, Chen L, Lin F, Xu HH. Glycinergic-Fipronil Uptake Is Mediated by an Amino Acid Carrier System and Induces the Expression of Amino Acid Transporter Genes in Ricinus communis Seedlings. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:3810-8. [PMID: 27092815 DOI: 10.1021/acs.jafc.5b06042] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Phloem-mobile insecticides are efficient for piercing and sucking insect control. Introduction of sugar or amino acid groups to the parent compound can improve the phloem mobility of insecticides, so a glycinergic-fipronil conjugate (GlyF), 2-(3-(3-cyano-1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-4-((trifluoromethyl)sulfinyl)-1H-pyrazole-5-yl)ureido) acetic acid, was designed and synthesized. Although the "Kleier model" predicted that this conjugate is not phloem mobile, GlyF can be continually detected during a 5 h collection of Ricinus communis phloem sap. Furthermore, an R. communis seedling cotyledon disk uptake experiment demonstrates that the uptake of GlyF is sensitive to pH, carbonyl cyanide m-chlorophenylhydrazone (CCCP), temperature, and p-chloromercuribenzenesulfonic acid (pCMBS) and is likely mediated by amino acid carrier system. To explore the roles of amino acid transporters (AATs) in GlyF uptake, a total of 62 AAT genes were identified from the R. communis genome in silico. Phylogenetic analysis revealed that AATs in R. communis were organized into the ATF (amino acid transporter) and APC (amino acid, polyaminem and choline transporter) superfamilies, with five subfamilies in ATF and two in APC. Furthermore, the expression profiles of 20 abundantly expressed AATs (cycle threshold (Ct) values <27) were analyzed at 1, 3, and 6 h after GlyF treatment by RT-qPCR. The results demonstrated that expression levels of four AAT genes, RcLHT6, RcANT15, RcProT2, and RcCAT2, were induced by the GlyF treatment in R. communis seedlings. On the basis of the observation that the expression profile of the four candidate genes is similar to the time course observation for GlyF foliar disk uptake, it is suggested that those four genes are possible candidates involved in the uptake of GlyF. These results contribute to a better understanding of the mechanism of GlyF uptake as well as phloem loading from a molecular biology perspective and facilitate functional characterization of candidate AAT genes in future studies.
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Affiliation(s)
- Yun Xie
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Jun-Long Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Chuan-Wei Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Ai-Xin Yu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Niu Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Li Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Fei Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
| | - Han-Hong Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
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Food safety in Thailand 1: it is safe to eat watermelon and durian in Thailand. Environ Health Prev Med 2015; 20:204-15. [PMID: 25697579 DOI: 10.1007/s12199-015-0452-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 02/09/2015] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVES The wide use of pesticides raises serious concerns regarding food safety and environmental impacts. There is increasing public concern about the potential health risks linked with exposure to pesticides. Regulation of maximum residue limits (MRL) of pesticide residues in food commodities has been established in many developed countries. For developing countries, like Thailand, this regulation often exists in law, but is not completely enforced in practice. Thus, pesticide residue levels in vegetables and fruits have not been thoroughly monitored. The present study aimed to examine potential health risks associated with pesticide exposure by determining the pesticide residues in two commonly consumed fruits, watermelon and durian. METHODS The fruit samples were purchased from markets in central provinces of Thailand and assayed for the content of 28 pesticides. Analysis of pesticides was performed by multiresidue extraction and followed by GC-MS/MS detection. RESULTS Of 28 pesticides investigated, 5 were detected in 90.7% of the watermelon samples (n = 75) and 3 in 90% of durian samples (n = 30). Carbofuran, chlorpyrifos, diazinon, dimethoate and metalaxyl were found in watermelons, whereas dichlorvos, dimethoate and metalaxyl were detected in durians. However, their levels were much lower than the recommended MRL values. CONCLUSIONS These pesticide levels detected in the fruits are unlikely to harm the consumers; therefore it is safe to eat watermelon and durian in Thailand. While our results found negligible risk associated with pesticide exposure from consuming these common tropical fruits, special precautions should be considered to decrease total exposure to these harmful pesticides from various foods.
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Wang J, Lei Z, Wen Y, Mao G, Wu H, Xu H. A novel fluorescent conjugate applicable to visualize the translocation of glucose-fipronil. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:8791-8. [PMID: 25134020 DOI: 10.1021/jf502838m] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The ability to visualize the movement of glycosyl insecticides contributes to learning their translocation and distribution in plants. In our present work, a novel fluorescent glucose-fipronil conjugate N-[3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[(trifluoromethyl)sulfinyl]-1H-pyrazol-5-yl]-1-(2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino]-2-deoxy-β-D-glucopyranosyl)-1H-1,2,3-triazole-4-methanamine (2-NBDGTF), was obtained via click chemistry. Disk uptake experiments showed that an active carrier-mediated system was involved in the 2-NBDGTF uptake process. Meanwhile, 2-NBDGTF exhibited comparable phloem mobility with GTF in castor bean seedlings. Visualization of 2-NBDGTF uptake and transport experiment showed that this fluorescent glucose-fipronil conjugate could be loaded into sieve tubes after transiting through epidermal cells and mesophyll cells and then translocate from cotyledon to hypocotyl via phloem in castor bean seedlings. The results above determined that it is a promising fluorescence tagging approach for revealing the activities of glycosyl insecticides and 2-NBDGTF is a reasonable and feasible fluorescent surrogate of GTF for tracing the distribution of glucose-fipronil conjugates.
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Affiliation(s)
- Jie Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and ‡Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, 510642, Guangdong China
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Lei Z, Wang J, Mao G, Wen Y, Tian Y, Wu H, Li Y, Xu H. Glucose positions affect the phloem mobility of glucose-fipronil conjugates. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:6065-71. [PMID: 24918526 DOI: 10.1021/jf5010429] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In our previous work, a glucose-fipronil (GTF) conjugate at the C-1 position was synthesized via click chemistry and a glucose moiety converted a non-phloem-mobile insecticide fipronil into a moderately phloem-mobile insecticide. In the present paper, fipronil was introduced into the C-2, C-3, C-4, and C-6 positions of glucose via click chemistry to obtain four new conjugates and to evaluate the effects of the different glucose isomers on phloem mobility. The phloem mobility of the four new synthetic conjugates and GTF was tested using the Ricinus seedling system. The results confirmed that conjugation of glucose at different positions has a significant influence on the phloem mobility of GTF conjugates.
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Affiliation(s)
- Zhiwei Lei
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
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40
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Qin PW, Wang J, Wang H, Wen YJ, Lu ML, Li YF, Xu YS, Xu HH. Synthesis of rotenone-O-monosaccharide derivatives and their phloem mobility. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:4521-4527. [PMID: 24780074 DOI: 10.1021/jf500197k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Six monosaccharide derivatives of rotenone were designed and synthesized to assess whether rotenone could become phloem mobile by the addition of a monosaccharide group. Phloem mobility experiments showed that only D-glucose conjugates exhibit phloem transport properties in castor bean (Ricinus communis L.) seedlings. Two D-glucose conjugates, 2-O-β-D-glucopyranosyldemethylrotenone and 6'-O-β-D-glucopyranosyldalpanol, had significantly obtained systemicity compared with that of rotenone, and 6'-O-β-D-glucopyranosyldalpanol was more mobile than 2-O-β-D-glucopyranosyldemethylrotenone. Coupling with a monosaccharide core is a reasonable method for conferring phloem mobility on insecticides, but phloem mobility is also affected by the parent molecule and the position of the monosaccharide.
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Affiliation(s)
- Pei-Wen Qin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, and ‡Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University , Guangzhou, Guangdong 510642, People's Republic of China
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41
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Lei Z, Wang J, Mao G, Wen Y, Xu H. Phloem mobility and translocation of fluorescent conjugate containing glucose and NBD in castor bean (Ricinus communis). JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 132:10-6. [PMID: 24561186 DOI: 10.1016/j.jphotobiol.2014.01.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Revised: 01/14/2014] [Accepted: 01/16/2014] [Indexed: 11/18/2022]
Abstract
Phloem mobility is an important factor for long-distance transport of systemic pesticides in plants. Our previous study revealed that a fluorescent glucose-insecticide conjugate, N-{3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-iodo-1H-pyrazol-5-yl}-N-{[1-(β-D-glucopyranosyl)-1H-1,2,3-triazole-4-yl]methyl}-N-{[1-((N-(7-nitrobenz-2-oxa-1,3-diazole-4-amine))-propyl)-1H-1,2,3-triazole-4-yl]methyl}amine (IPGN), can be transported in tobacco cells. Several studies have also indicated that glucose moieties can guide the conjugates into plant cells. In this study, we investigated the phloem mobility of IPGN within castor bean seedlings. Cotyledon uptake experiment results show that IPGN could enter the phloem of the mid-veins of cotyledons. The results of further quantitative analysis show that IPGN was present in small amounts in the phloem sap despite the inconsistencies of physicochemical properties with diffusion through the plasma membrane. Its concentration in the phloem sap (about 370nM at 5h) was much lower than that in the incubation medium (100μM), which suggests that IPGN exhibited weak phloem mobility. After the leaves of Ricinus plantlets were treated with IPGN, green fluorescence could be observed in the phloem of the petioles, bud apical nodes, bud mid-veins, and mid-veins of the untreated leaves. The localization of the fluorescent conjugate at various levels of Ricinus plantlets indicates that it was translocated at a distance to sink organs via sieve tubes. The results proved that introducing a glucose group is a feasible approach to modify non-phloem-mobile pesticides and produce phloem-mobile pesticides.
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Affiliation(s)
- Zhiwei Lei
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou 510642, Guangdong, China; Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Jie Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou 510642, Guangdong, China; Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Genlin Mao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou 510642, Guangdong, China; Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Yingjie Wen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou 510642, Guangdong, China; Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - Hanhong Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou 510642, Guangdong, China; Key Laboratory of Natural Pesticide and Chemical Biology of the Ministry of Education, South China Agricultural University, Guangzhou 510642, Guangdong, China.
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Jia JL, Zhu L, Jin XY, Wang J, Zhang W, Wu HX, Xu HH. 2,4-Dichlorophenoxyacetic acid functionalized gold nanoparticles: synthesis, characterization and biological effects. J Mater Chem B 2014; 2:3299-3305. [DOI: 10.1039/c4tb00400k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jin-Liang Jia
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, Guangdong 510642, China.
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Wang H, Yang Z, Liu R, Fu Q, Zhang S, Cai Z, Li J, Zhao X, Ye Q, Wang W, Li Z. Stereoselective uptake and distribution of the chiral neonicotinoid insecticide, Paichongding, in Chinese pak choi (Brassica campestris ssp. chinenesis). JOURNAL OF HAZARDOUS MATERIALS 2013; 262:862-869. [PMID: 24140538 DOI: 10.1016/j.jhazmat.2013.09.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 08/16/2013] [Accepted: 09/21/2013] [Indexed: 06/02/2023]
Abstract
Neonicotinoid chiral insecticidal Paichongding is a promising substitute for the widely used imidacloprid. Four stereoisomers of Paichongding, 5R,7R, 5S,7S, 5S,7R and 5R,7S, were employed in both foliage and roots of Chinese pak choi to investigate their stereoselective uptake and distribution in pak choi. Results showed that after foliar application, no stereoselective absorption into pak-choi plants was observed among the enantiomers. Total absorptions were 35.40% of the applied amount for 5R,7R, 36.66% for 5S,7S, 36.80% for 5S,7R and 38.20% for 5R,7S at 96 HAT. The translocation of the four absorbed stereoisomers within pak choi occurred both acropetally and basipetally and the transport of (14)C from enantiomers 5R,7R and 5S,7S were significantly higher than for 5R,7S and 5S,7R. Significant stereoselective translocation inside plants was observed between Paichongding epimers. Total root uptake reached 16.49-19.85% for 5R,7R and 5S,7S, and 24.57-28.82% for 5S,7R and 5R,7S at 144 HAT. Both enantioselective and diastereoselective root uptake into pak-choi occurred between the four stereoisomers. The 5R,7S and 5S,7R enantiomers were more readily uptaken by the roots than 5R,7R and 5S,7S and accumulated in the edible leaves. These results will help to develop an understanding of Paichongding using only the target-active enantiomer of pesticides.
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Affiliation(s)
- Haiyan Wang
- Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture and Zhejiang Province, Zhejiang University, Hangzhou 310029, China
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Yuan JG, Wu HX, Lu ML, Song GP, Xu HH. Synthesis of a series of monosaccharide-fipronil conjugates and their phloem mobility. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:4236-41. [PMID: 23586601 DOI: 10.1021/jf400888c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
To test the effect of adding different monosaccharide groups to a non-phloem-mobile insecticide on the phloem mobility of the insecticide, a series of conjugates of different monosaccharides and fipronil were synthesized using the trichloroacetimidate method. Phloem mobility tests in castor bean ( Ricinus communis L.) seedlings indicated that the phloem mobility of these conjugates varied markedly. L-Rhamnose-fipronil and D-fucose-fipronil displayed the highest phloem mobility among all of the tested conjugates. Conjugating hexose, pentose, or deoxysugar to fipronil through an O-glycosidic linkage can confer phloem mobility to fipronil in R. communis L. effectively, while the -OH orientation of the monosaccharide substantially affected the phloem mobility of the conjugates.
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Affiliation(s)
- Jian-Guo Yuan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, People's Republic of China
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