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Huang Y, Xiong Q, Li J, Gan C, Zhang Y, Mo Q, Pang L, Cui J. Enhancing Systemic Translocation of Insecticides via Nanoformulations Incorporating β-Cyclodextrin Octadecarboxylate as a Carrier. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:3374-3387. [PMID: 38319593 DOI: 10.1021/acs.jafc.3c07824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
The conversion of contact-killing pesticides into systemic pesticides can significantly enhance the bioavailability of pesticides, thereby reducing pesticide usage and environmental harm. A series of β-cyclodextrin fatty acid esters with varying branch chains were synthesized and employed as carriers in nanoformulation of insecticide. The investigation revealed that nanoformulations prepared using β-cyclodextrin octadecarboxylate (β-CDs) exhibited superior stability and remarkable systemic translocation within plants. Six contact-killing insecticide nanoformulations were developed utilizing β-CDs as carriers, and tests indicated that β-CDs significantly enhanced the systemic translocation of insecticides in plants compared to carrier-free nanoformulations. It was found that β-CDs increased the level of systemic translocation of insecticides by 5-12 times. Additionally, characterization results from λ-cyhalothrin-β-CDs nanoformulation demonstrated their superior ability to improve photolysis resistance, prolong release time, and extend insecticidal duration. Consequently, β-CDs can be utilized as a green additive in pesticide production to enhance the systemic translocation of pesticides in plants and increase their bioavailability.
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Affiliation(s)
- Yanmin Huang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P. R. China
| | - Qipeng Xiong
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P. R. China
| | - Jiansheng Li
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P. R. China
| | - Chunfang Gan
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P. R. China
| | - Yuanfei Zhang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P. R. China
| | - Qijin Mo
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P. R. China
| | - Liping Pang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P. R. China
| | - Jianguo Cui
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P. R. China
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Yao G, Han S, Wen Y, Xiao Y, Zhao C, Xu H. Design, synthesis, insecticidal activities and translocation of amino acid-tralopyril conjugates as vectorizing agrochemicals. PEST MANAGEMENT SCIENCE 2023; 79:4018-4024. [PMID: 37278576 DOI: 10.1002/ps.7599] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/29/2023] [Accepted: 06/02/2023] [Indexed: 06/07/2023]
Abstract
BACKGROUND Conjugating amino acid moieties to active ingredients has been recognized as an effective method for improving the precise targeting of the active form to the specific site. Based on the vectorization strategy, a series of amino acid-tralopyril conjugates were designed and synthesized as novel proinsecticide candidates, with the potential capability of root uptake and translocation to the foliage of crops. RESULTS Bioassay results showed excellent insecticidal activities of some conjugates, in particular, the conjugates 6b, 6e, and 7e, against the diamondback moth (Plutella xylostella), with equivalent insecticidal activity to chlorfenapyr (CFP). Importantly, conjugate 6e exhibited significantly higher in vivo insecticidal activity against P. xylostella than CFP. Furthermore, the systemic test experiments with Brassica chinensis demonstrated that conjugates 6e and 7e could be transported to the leaves, in contrast to CFP, which remained in the root. CONCLUSION This study demonstrated the feasibility of amino acid fragment conjugation as a vectorization strategy for transporting non-systemic insecticides into the leaves of B. chinensis while maintaining in vivo insecticidal activity. The findings also provide insights for subsequent mechanism studies on the uptake and transport of amino acid-insecticide conjugates in plants. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Guangkai Yao
- National Key Laboratory of Green Pesticide; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education; College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Shuo Han
- National Key Laboratory of Green Pesticide; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education; College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Yingjie Wen
- National Key Laboratory of Green Pesticide; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education; College of Plant Protection, South China Agricultural University, Guangzhou, China
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs; Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research; Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Yuyan Xiao
- National Key Laboratory of Green Pesticide; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education; College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Chen Zhao
- National Key Laboratory of Green Pesticide; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education; College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Hanhong Xu
- National Key Laboratory of Green Pesticide; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education; College of Plant Protection, South China Agricultural University, Guangzhou, 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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Wang B, Yang C, Jiang X, Wen Y, Tian Y, Zhao C, Xu H. Design of new glycosyl-O-fipronil conjugates with improved hydrolysis efficiency assisted by molecular simulations. PEST MANAGEMENT SCIENCE 2022; 78:2667-2678. [PMID: 35365912 DOI: 10.1002/ps.6898] [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: 10/26/2021] [Revised: 02/28/2022] [Accepted: 03/30/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND In a previous study, we showed that two glycosyl-pesticide conjugates with a β-d-glucoside moiety, N-{3-cyano-1-[2,6-dichloro-4-(trifluoromethyl) phenyl]-4-[(trifluoromethyl)-sulfinyl]-1H-pyrazol-5-yl}-2-aminoethyl-β-d-glucopyranoside (GOF) and N-{3-cyano-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[(trifluoromethyl) sulfinyl]-1H-pyrazol-5-yl}-1-(2-triazolethyl-β-d-glucopyranoside)-1H-1,2,3-triazole-4-methanamine (GOTF), can move in the phloem and be hydrolyzed by β-glucosidase at different rates. Simulations were carried out to investigate differences in the hydrolysis process in GOF, GOTF and p-nitrophenyl β-d-glucopyranoside (pNPG). A new series of glycosyl-O-fipronil conjugates was then designed and synthesized based on the simulation results. The phloem mobilities of the new conjugates were examined using a Ricinus model, and their hydrolysis efficiencies based on β-glucosidase were determined. RESULTS New glycosyl-O-fipronil conjugates GOE2-6 were designed and synthesized. To reduce steric hindrance, the conjugating site of the glycone moiety was moved to the 4'-sulfonyl group on the pyrrole ring. As a result, the hydrolysis efficiencies of the new conjugates were significantly improved, with GOE4 having the highest hydrolysis efficiency. All five conjugates could be transported in Ricinus phloem sap, consistent with previously studied glycosyl-O-fipronil conjugates. The insecticidal activities of the conjugates were tested against Plutella xylostella. CONCLUSION A strategy for the development of new phloem-mobile pesticides was proposed: linking a glycosyl group to the existing pesticide structure with a linear alkyl connection approximately four carbons in length. The resultant conjugates feature not only good phloem mobility, but also potential high bioactivity due to the efficient release of active pesticide components under the action of glucosidase. © 2022 Society of Chemical Industry.
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Affiliation(s)
| | | | - Xunyuan Jiang
- Institute of Quality Standard and Monitoring Technology for Agro-products, Guangdong Academy of Agricultural Sciences and Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-products, Guangzhou, People's Republic of China
| | - Yingjie Wen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Key Laboratory of Natural Pesticide and Chemical Biology (Ministry of Education), South China Agricultural University, Guangzhou, People's Republic of China
| | - Yongqing Tian
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Key Laboratory of Natural Pesticide and Chemical Biology (Ministry of Education), South China Agricultural University, Guangzhou, People's Republic of China
| | - Chen Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Key Laboratory of Natural Pesticide and Chemical Biology (Ministry of Education), South China Agricultural University, Guangzhou, People's Republic of China
| | - Hanhong Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Key Laboratory of Natural Pesticide and Chemical Biology (Ministry of Education), South China Agricultural University, Guangzhou, People's Republic of China
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Kenfaoui J, Radouane N, Mennani M, Tahiri A, El Ghadraoui L, Belabess Z, Fontaine F, El Hamss H, Amiri S, Lahlali R, Barka EA. A Panoramic View on Grapevine Trunk Diseases Threats: Case of Eutypa Dieback, Botryosphaeria Dieback, and Esca Disease. J Fungi (Basel) 2022; 8:jof8060595. [PMID: 35736078 PMCID: PMC9224927 DOI: 10.3390/jof8060595] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 05/30/2022] [Accepted: 05/30/2022] [Indexed: 12/04/2022] Open
Abstract
Grapevine trunk diseases (GTD) are currently one of the most devastating and challenging diseases in viticulture, leading to considerable yield losses and a remarkable decline in grapevine quality. The identification of the causal agents is the cornerstone of an efficient approach to fighting against fungal diseases in a sustainable, non-chemical manner. This review attempts to describe and expose the symptoms of each pathology related to GTD, the modes of transmission, and the harmfulness of recently reported agents. Special attention was given to new diagnostic tests and technologies, grapevine defense mechanisms, molecular mechanisms of endophytes fungal colonization, and management strategies used to control these threats. The present extended review is, therefore, an updated state-of-the-art report on the progress in the management of vineyards.
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Affiliation(s)
- Jihane Kenfaoui
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknès, Km10, Rte Haj Kaddour, BP S/40, Meknes 50001, Morocco; (J.K.); (N.R.); (M.M.); (A.T.); (H.E.H.); (S.A.)
- Laboratory of Functional Ecology and Environmental Engineering, Sidi Mohamed Ben Abdellah University, P.O. Box 2202, Route d’Imouzzer, Fez 30500, Morocco;
| | - Nabil Radouane
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknès, Km10, Rte Haj Kaddour, BP S/40, Meknes 50001, Morocco; (J.K.); (N.R.); (M.M.); (A.T.); (H.E.H.); (S.A.)
- Laboratory of Functional Ecology and Environmental Engineering, Sidi Mohamed Ben Abdellah University, P.O. Box 2202, Route d’Imouzzer, Fez 30500, Morocco;
| | - Mohammed Mennani
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknès, Km10, Rte Haj Kaddour, BP S/40, Meknes 50001, Morocco; (J.K.); (N.R.); (M.M.); (A.T.); (H.E.H.); (S.A.)
| | - Abdessalem Tahiri
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknès, Km10, Rte Haj Kaddour, BP S/40, Meknes 50001, Morocco; (J.K.); (N.R.); (M.M.); (A.T.); (H.E.H.); (S.A.)
| | - Lahsen El Ghadraoui
- Laboratory of Functional Ecology and Environmental Engineering, Sidi Mohamed Ben Abdellah University, P.O. Box 2202, Route d’Imouzzer, Fez 30500, Morocco;
| | - Zineb Belabess
- Plant Protection Laboratory, Regional Center of Agricultural Research of Oujda, National Institute of Agricultural Research, Avenue Mohamed VI, BP428 Oujda, Oujda 60000, Morocco;
| | - Florence Fontaine
- Unité de Recherche Résistance Induite et Bio-Protection des Plantes-EA 4707 USC INRAE 1488, Université de Reims Champagne-Ardenne, 51100 Reims, France;
| | - Hajar El Hamss
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknès, Km10, Rte Haj Kaddour, BP S/40, Meknes 50001, Morocco; (J.K.); (N.R.); (M.M.); (A.T.); (H.E.H.); (S.A.)
| | - Said Amiri
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknès, Km10, Rte Haj Kaddour, BP S/40, Meknes 50001, Morocco; (J.K.); (N.R.); (M.M.); (A.T.); (H.E.H.); (S.A.)
| | - Rachid Lahlali
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknès, Km10, Rte Haj Kaddour, BP S/40, Meknes 50001, Morocco; (J.K.); (N.R.); (M.M.); (A.T.); (H.E.H.); (S.A.)
- Correspondence: (R.L.); (E.A.B.); Tel.: +212-55-30-02-39 (R.L.); +33-3-2691-3441 (E.A.B.)
| | - Essaid Ait Barka
- Unité de Recherche Résistance Induite et Bio-Protection des Plantes-EA 4707 USC INRAE 1488, Université de Reims Champagne-Ardenne, 51100 Reims, France;
- Correspondence: (R.L.); (E.A.B.); Tel.: +212-55-30-02-39 (R.L.); +33-3-2691-3441 (E.A.B.)
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Li Z. Improved Pesticide Product Labeling Information for Household Lawn Management: Recommended Safe Durations in Support of Minimizing Children’s Exposure to Pesticides. ACS CHEMICAL HEALTH & SAFETY 2022. [DOI: 10.1021/acs.chas.1c00092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Zijian Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, Guangdong 518107, China
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Vectorizing Pro-Insecticide: Influence of Linker Length on Insecticidal Activity and Phloem Mobility of New Tralopyril Derivatives. Molecules 2021; 26:molecules26154570. [PMID: 34361721 PMCID: PMC8348000 DOI: 10.3390/molecules26154570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/22/2021] [Accepted: 07/23/2021] [Indexed: 11/17/2022] Open
Abstract
To improve the proinsecticidal activity and phloem mobility of amino acid–tralopyril conjugates further, nine conjugates were designed and synthesized by introducing glutamic acid to tralopyril, and the length of the linker between glutamic acid and tralopyril ranged from 2 atoms to 10 atoms. The results of insecticidal activity against the third-instar larvae of P. xylostella showed that conjugates 42, 43, 44,and 45 (straight-chain containing 2–5 atoms) exhibited good insecticidal activity, and their LC50 values were 0.2397 ± 0.0366, 0.4413 ± 0.0647, 0.4400 ± 0.0624, and 0.4602 ± 0.0655 mM, respectively. The concentrations of conjugates 43–45 were higher than that of conjugate 42 in the phloem sap at 2 h, and conjugate 43 showed the highest concentration. The introduction of glutamic acid can improve phloem mobility. The in vivo metabolism of conjugates 42 and 43 was investigated in P. xylostella, and the parent compound tralopyril was detected at concentrations of 0.5950 and 0.3172 nmol/kg, respectively. According to the above results, conjugates 42 and 43 were potential phloem mobile pro-insecticide candidates.
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Yang J, Lv G, Wang Z, Sun X, Gao J. Mechanisms, kinetics and eco-toxicity assessment of singlet oxygen, sulfate and hydroxyl radicals-initiated degradation of fenpiclonil in aquatic environments. JOURNAL OF HAZARDOUS MATERIALS 2021; 409:124505. [PMID: 33191031 DOI: 10.1016/j.jhazmat.2020.124505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/13/2020] [Accepted: 11/05/2020] [Indexed: 06/11/2023]
Abstract
Fenpiclonil is an agricultural phenylpyrrole fungicide, which raise the concern about its ecotoxicological effects. In this paper, we investigate the indirect photochemical transformation mechanisms, environmental persistence and eco-toxicity of fenpiclonil initiated by various active oxidants (1O2, •OH and SO4•‾) in aquatic environments. The results shown that 1O2 can react with pyrrole ring by cycloaddition pathways to form the endo-peroxides. In addition, •OH and SO4•‾ initial mechanisms are calculated, suggesting that •OH-initiated mechanisms play a dominant role in the degradation process of fenpiclonil at high rate constants (2.26 ×109 M-1 s-1, at 298 K). The kinetic calculation results indicate that high temperature is more favorable for the degradation of fenpiclonil. To better understand the adverse effects of the transformation products formed during the subsequent reaction of •OH-adduct IM10, the computational toxicology has been used for the toxicity estimation. The results show that aquatic toxicity of these products decrease with degradation process, especially the decomposition products (TP3 and TP4). However, TP1 and TP2 are still toxic and developmental toxicant. The study provides guidance for further experimental research and industrial application of fungicide degradation from the perspective of theoretical calculation.
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Affiliation(s)
- Jiaoxue Yang
- Environment Research Institute, Shandong University, Qingdao 266237, China
| | - Guochun Lv
- Environment Research Institute, Shandong University, Qingdao 266237, China
| | - Zehua Wang
- Environment Research Institute, Shandong University, Qingdao 266237, China
| | - Xiaomin Sun
- Environment Research Institute, Shandong University, Qingdao 266237, China.
| | - Jian Gao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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Wu H, Hu P, Xu Y, Xiao C, Chen Z, Liu X, Jia J, Xu H. Phloem Delivery of Fludioxonil by Plant Amino Acid Transporter-Mediated Polysuccinimide Nanocarriers for Controlling Fusarium Wilt in Banana. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:2668-2678. [PMID: 33629581 DOI: 10.1021/acs.jafc.0c07028] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Fusarium wilt disease poses a serious threat to the global production of bananas. The targeted delivery of fungicides to banana phloem tissues may offer new hope for controlling this hard-to-treat vascular disease. In this study, fludioxonil (FLU)-loaded glycine methyl ester-conjugated polysuccinimide nanoparticles (PGA) were prepared with a loading efficiency (LE) of 27.9%. The obtained nanoparticles (FLU@PGA) exhibited pH-sensitive controlled release, specifically under an alkaline pH in plant phloem. In vivo experiments in potted bananas demonstrated that FLU@PGA can achieve the downward delivery of FLU to banana rhizomes and roots after foliar application, reducing disease severity by 50.4%. The phloem transport studies showed that the phloem loading of FLU@PGA was involved in an active transport mechanism at the organ level (castor bean seedlings). The observation of fluorescein-5-isothiocyanate cadaverine-labeled PGA nanocarriers showed that they could be absorbed by mesophyll cells and loaded into vascular tissues through the symplastic pathway. Furthermore, the interaction of FLU@PGA with the plant amino acid transporter AtLHT1 was observed to enhance transmembrane uptake at the cellular level (Xenopus oocytes). These results suggested that the phloem-targeted delivery of fungicide by transporter-mediated nanocarriers could be a promising new strategy for the management of Fusarium wilt in bananas.
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Affiliation(s)
- Hanxiang Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, Guangdong 510642, China
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Pengtong Hu
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Ye Xu
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Chunxia Xiao
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Zhibin Chen
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Xiaojing Liu
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Jinliang Jia
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, Guangdong 510642, China
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
- Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, Guangzhou, Guangdong 510642, China
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Hanhong Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, Guangdong 510642, China
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, Guangdong 510642, China
- Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, Guangzhou, Guangdong 510642, China
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10
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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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11
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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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12
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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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13
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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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14
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Wang H, Yi X, Cui Y, Chen W. Rhodium-catalyzed triazole-directed C–H bond functionalization of arenes with diazo compounds. Org Biomol Chem 2018; 16:8191-8195. [DOI: 10.1039/c8ob01673a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Rhodium(iii)-catalyzed alkylation reactions of arenes through triazole directed C–H activation that lead to a number of dialkylated and monoalkylated triazoles are described.
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Affiliation(s)
- Huanhong Wang
- Department of Chemistry
- Zhejiang University
- Hangzhou
- P. R. China
| | - Xiaofei Yi
- Department of Chemistry
- Zhejiang University
- Hangzhou
- P. R. China
| | - Yanli Cui
- Department of Chemistry
- Zhejiang University
- Hangzhou
- P. R. China
| | - Wanzhi Chen
- Department of Chemistry
- Zhejiang University
- Hangzhou
- P. R. China
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15
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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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