1
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Chávez-Reyes J, López-Lariz CH, Marichal-Cancino BA. Both acute glyphosate and the aminomethylphosphonic acid intoxication decreased the acetylcholinesterase activity in rat hippocampus, prefrontal cortex and gastrocnemius muscle. Drug Chem Toxicol 2024:1-5. [PMID: 38465510 DOI: 10.1080/01480545.2024.2326634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 02/28/2024] [Indexed: 03/12/2024]
Abstract
It has been reported that glyphosate, one of the most common herbicides used in agriculture, impairs locomotion and cognition. Glyphosate has a variable half-life in soil up to biotic and/or abiotic factors transform the molecule in metabolites such as the aminomethylphosphonic acid (AMPA) that has a longer half-life. In this study, female Sprague Dawley rats were acutely exposed to different doses of glyphosate or AMPA (i.e. 10, 56 or 100 mg/kg) and, subsequently, the acetylcholinesterase (AChE) activity was measured in the hippocampus, prefrontal cortex (PFC) and the gastrocnemius muscle. Both glyphosate and AMPA produced a similar decrease in the AChE activity in all the tissues tested. These results suggest that interference with normal cholinergic neurotransmission may be one of the mechanisms involved in glyphosate-induced motor alterations in rats. Moreover, our results highlight the biological importance of AMPA as a molecule with anticholinesterase action in brain and skeletal muscle. To our knowledge, this is the first report showing in vivo that AMPA, the major metabolite of glyphosate, behaves as an organophosphate.
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Affiliation(s)
- Jesús Chávez-Reyes
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, México
| | - Carlos H López-Lariz
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, México
| | - Bruno A Marichal-Cancino
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, México
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2
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Singh R, Shukla A, Kaur G, Girdhar M, Malik T, Mohan A. Systemic Analysis of Glyphosate Impact on Environment and Human Health. ACS OMEGA 2024; 9:6165-6183. [PMID: 38371781 PMCID: PMC10870391 DOI: 10.1021/acsomega.3c08080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 12/15/2023] [Accepted: 12/29/2023] [Indexed: 02/20/2024]
Abstract
With a growing global population, agricultural scientists are focusing on crop production management and the creation of new strategies for a higher agricultural output. However, the growth of undesirable plants besides the primary crop poses a significant challenge in agriculture, necessitating the massive application of herbicides to eradicate this problem. Several synthetic herbicides are widely utilized, with glyphosate emerging as a potential molecule for solving this emerging issue; however, it has several environmental and health consequences. Several weed species have evolved resistance to this herbicide, therefore lowering agricultural yield. The persistence of glyphosate residue in the environment, such as in water and soil systems, is due to the misuse of glyphosate in agricultural regions, which causes its percolation into groundwater via the vertical soil profile. As a result, it endangers many nontarget organisms existing in the natural environment, which comprises both soil and water. The current Review aims to provide a systemic analysis of glyphosate, its various effects on the environment, its subsequent impact on human health and animals, which will lead us toward a better understanding of the issues about herbicide usage and aid in managing it wisely, as in the near the future glyphosate market is aiming for a positive forecast until 2035.
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Affiliation(s)
- Reenu Singh
- School
of Bioengineering and Biosciences, Lovely
Professional University, Phagwara, Punjab 144411, India
| | - Akanksha Shukla
- School
of Bioengineering and Biosciences, Lovely
Professional University, Phagwara, Punjab 144411, India
| | - Gurdeep Kaur
- School
of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab 144411, India
| | - Madhuri Girdhar
- School
of Bioengineering and Biosciences, Lovely
Professional University, Phagwara, Punjab 144411, India
| | - Tabarak Malik
- Department
of Biomedical Sciences, Institute of Health, Jimma University, Jimma 00000, Ethiopia
| | - Anand Mohan
- School
of Bioengineering and Biosciences, Lovely
Professional University, Phagwara, Punjab 144411, India
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3
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Meng Y, Zhang W, Wang Z, Yuan F, Guo S, Lin H, Niu L. Co-expression of GR79 EPSPS and GAT generates high glyphosate-resistant alfalfa with low glyphosate residues. ABIOTECH 2023; 4:352-358. [PMID: 38106433 PMCID: PMC10721576 DOI: 10.1007/s42994-023-00119-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 09/07/2023] [Indexed: 12/19/2023]
Abstract
Weed competition seriously threatens the yield of alfalfa, the most important forage legume worldwide, thus generating herbicide-resistant alfalfa varieties is becoming a necessary cost-effective strategy to assist farmers for weed control. Here, we report the co-expression of plant codon-optimized forms of GR79 EPSPS (pGR79 EPSPS) and N-acetyltransferase (pGAT) genes, in alfalfa, via Agrobacterium-mediated transformation. We established that the pGR79 EPSPS-pGAT co-expression alfalfa lines were able to tolerate up to tenfold higher commercial usage of glyphosate and produced approximately ten times lower glyphosate residues than the conventional cultivar. Our findings generate an elite herbicide-resistant germplasm for alfalfa breeding and provide a promising strategy for developing high-glyphosate-resistant and low-glyphosate-residue forages. Supplementary Information The online version contains supplementary material available at 10.1007/s42994-023-00119-3.
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Affiliation(s)
- Yingying Meng
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081 China
| | - Wenwen Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081 China
| | - Zhaoming Wang
- Inner Mongolia Pratacultural Technology Innovation Center Co., Ltd, Hohhot, 010010 China
- National Center of Pratacultural Technology Innovation (Under Preparation), Hohhot, 010010 China
| | - Feng Yuan
- Inner Mongolia Pratacultural Technology Innovation Center Co., Ltd, Hohhot, 010010 China
- National Center of Pratacultural Technology Innovation (Under Preparation), Hohhot, 010010 China
| | - Sandui Guo
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081 China
| | - Hao Lin
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081 China
| | - Lifang Niu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081 China
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4
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Li S, Li P, Li X, Wen N, Wang Y, Lu W, Lin M, Lang Z. In maize, co-expression of GAT and GR79-EPSPS provides high glyphosate resistance, along with low glyphosate residues. ABIOTECH 2023; 4:277-290. [PMID: 38106436 PMCID: PMC10721750 DOI: 10.1007/s42994-023-00114-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 08/01/2023] [Indexed: 12/19/2023]
Abstract
Herbicide tolerance has been the dominant trait introduced during the global commercialization of genetically modified (GM) crops. Herbicide-tolerant crops, especially glyphosate-resistant crops, offer great advantages for weed management; however, despite these benefits, glyphosate-resistant maize (Zea mays L.) has not yet been commercially deployed in China. To develop a new bio-breeding resource for glyphosate-resistant maize, we introduced a codon-optimized glyphosate N-acetyltransferase gene, gat, and the enolpyruvyl-shikimate-3-phosphate synthase gene, gr79-epsps, into the maize variety B104. We selected a genetically stable high glyphosate resistance (GR) transgenic event, designated GG2, from the transgenic maize population through screening with high doses of glyphosate. A molecular analysis demonstrated that single copy of gat and gr79-epsps were integrated into the maize genome, and these two genes were stably transcribed and translated. Field trials showed that the transgenic event GG2 could tolerate 9000 g acid equivalent (a.e.) glyphosate per ha with no effect on phenotype or yield. A gas chromatography-mass spectrometry (GC-MS) analysis revealed that, shortly after glyphosate application, the glyphosate (PMG) and aminomethylphosphonic acid (AMPA) residues in GG2 leaves decreased by more than 90% compared to their levels in HGK60 transgenic plants, which only harbored the epsps gene. Additionally, PMG and its metabolic residues (AMPA and N-acetyl-PMG) were not detected in the silage or seeds of GG2, even when far more than the recommended agricultural dose of glyphosate was applied. The co-expression of gat and gr79-epsps, therefore, confers GG2 with high GR and a low risk of herbicide residue accumulation, making this germplasm a valuable GR event in herbicide-tolerant maize breeding. Supplementary Information The online version contains supplementary material available at 10.1007/s42994-023-00114-8.
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Affiliation(s)
- Shengyan Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Pengcheng Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiangyin Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ning Wen
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yinxiao Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wei Lu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Min Lin
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhihong Lang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
- National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya, Hainan China
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5
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Gao W, Zhang Y, Lin M, Mao J, Xing B, Li Y, Hou R. Capability of phytoremediation of glyphosate in environment by Vulpia myuros. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 265:115511. [PMID: 37774542 DOI: 10.1016/j.ecoenv.2023.115511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 09/17/2023] [Accepted: 09/20/2023] [Indexed: 10/01/2023]
Abstract
Glyphosate is an herbicide extensively used worldwide that can remain in the soil. Phytoremediation to decontaminate polluted water or soil requires a plant that can accumulate the target compound. Vulpia myuros is an annual fescue that can be used as a heavy mental phytoremediation strategy. Recently, it has been used to intercrop with tea plant to prohibit the germination and growth of other weeds in tea garden. In order to know whether it can be used an decontaminating glyphosate' plant in water or soil, in this study, glyphosate degradation behavior was investigated in Vulpia myuros cultivated in a hydroponic system. The results showed that the concentration of glyphosate in the nutrient solution decreased from 43.09 μg mL-1 to 0.45 μg mL-1 in 30 days and that 99% of the glyphosate molecules were absorbed by V. myuros. The contents of glyphosate in the roots reached the maximum (224.33 mg kg-1) on day 1 and then decreased. After 3 days, the content of glyphosate in the leaves reached the highest value (215.64 mg kg-1), while it decreased to 156.26 mg kg-1 in the roots. The dissipation dynamics of glyphosate in the whole hydroponic system fits the first-order kinetic model C = 455.76e-0.21 t, with a half-life of 5.08 days. Over 30 days, 80% of the glyphosate was degraded. The contents of the glyphosate metabolite amino methyl phosphoric acid (AMPA), ranged from 0.103 mg kg-1 on day 1-0.098 mg kg-1 on day 30, not changing significantly over time. The Croot/solution, Cleaf/solution and Cleaf/root were used to express the absorption, transfer, and distribution of glyphosate in V. myuros. These results indicated that glyphosate entered into the root system through free diffusion, which was influenced by both the log Kow and the concentration of glyphosate in the nutrient solution, and that glyphosate was either easily transferred to the leaves through the transpiration stream, accumulated, or degraded. The degradation of glyphosate in V. myuros indicated that it has potential as a remediating plant for environmental restoration.
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Affiliation(s)
- Wanjun Gao
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, PR China; Tea Research Institute, Tea Refining and Innovation Key Laboratory of Sichuan Province, Sichuan Academy of Agricultural Sciences, Chengdu 610066, PR China
| | - Yongzhi Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, PR China
| | - Mengling Lin
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, PR China
| | - Junlin Mao
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, PR China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States
| | - Yeyun Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, PR China.
| | - Ruyan Hou
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei 230036, PR China.
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6
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Lucia RM, Liao X, Huang WL, Forman D, Kim A, Ziogas A, Norden-Krichmar TM, Goodman D, Alvarez A, Masunaka I, Pathak KV, McGilvrey M, Hegde AM, Pirrotte P, Park HL. Urinary glyphosate and AMPA levels in a cross-sectional study of postmenopausal women: Associations with organic eating behavior and dietary intake. Int J Hyg Environ Health 2023; 252:114211. [PMID: 37393842 PMCID: PMC10503538 DOI: 10.1016/j.ijheh.2023.114211] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/08/2023] [Accepted: 06/16/2023] [Indexed: 07/04/2023]
Abstract
Animal and epidemiologic studies suggest that there may be adverse health effects from exposure to glyphosate, the most highly used pesticide in the world, and its metabolite aminomethylphosphonic acid (AMPA). Meanwhile, consumption of organic foods (presumably grown free of chemical pesticides) has increased in recent years. However, there have been limited biomonitoring studies assessing the levels of human glyphosate and AMPA exposure in the United States. We examined urinary levels of glyphosate and AMPA in the context of organic eating behavior in a cohort of healthy postmenopausal women residing in Southern California and evaluated associations with demographics, dietary intake, and other lifestyle factors. 338 women provided two first-morning urine samples and at least one paired 24-h dietary recall reporting the previous day's dietary intake. Urinary glyphosate and AMPA were measured using LC-MS/MS. Participants reported on demographic and lifestyle factors via questionnaires. Potential associations were examined between these factors and urinary glyphosate and AMPA concentrations. Glyphosate was detected in 89.9% of urine samples and AMPA in 67.2%. 37.9% of study participants reported often or always eating organic food, 30.2% sometimes, and 32.0% seldom or never. Frequency of organic food consumption was associated with several demographic and lifestyle factors. Frequent organic eaters had significantly lower urinary glyphosate and AMPA levels, but not after adjustment for covariates. Grain consumption was significantly associated with higher urinary glyphosate levels, even among women who reported often or always eating organic grains. Soy protein and alcohol consumption as well as high frequency of eating fast food were associated with higher urinary AMPA levels. In conclusion, in the largest study to date examining paired dietary recall data and measurements of first-void urinary glyphosate and AMPA, the vast majority of subjects sampled had detectable levels, and significant dietary sources in the American diet were identified.
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Affiliation(s)
- Rachel M Lucia
- Department of Epidemiology and Biostatistics, University of California, Irvine, CA, USA
| | - Xiyue Liao
- Department of Mathematics and Statistics, California State University, Long Beach, CA, USA
| | - Wei-Lin Huang
- Department of Epidemiology and Biostatistics, University of California, Irvine, CA, USA
| | - Danielle Forman
- Department of Pathology and Laboratory Medicine, University of California, Irvine, CA, USA
| | - Alexis Kim
- Department of Pathology and Laboratory Medicine, University of California, Irvine, CA, USA
| | - Argyrios Ziogas
- Department of Medicine, University of California, Irvine, CA, USA
| | | | - Deborah Goodman
- Department of Epidemiology and Biostatistics, University of California, Irvine, CA, USA
| | - Andrea Alvarez
- Department of Medicine, University of California, Irvine, CA, USA
| | - Irene Masunaka
- Department of Medicine, University of California, Irvine, CA, USA
| | - Khyatiben V Pathak
- Integrated Mass Spectrometry Shared Resource, City of Hope Comprehensive Cancer Center, Duarte, CA, USA; Cancer & Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Marissa McGilvrey
- Integrated Mass Spectrometry Shared Resource, City of Hope Comprehensive Cancer Center, Duarte, CA, USA; Cancer & Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Apurva M Hegde
- Integrated Mass Spectrometry Shared Resource, City of Hope Comprehensive Cancer Center, Duarte, CA, USA; Cancer & Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Patrick Pirrotte
- Integrated Mass Spectrometry Shared Resource, City of Hope Comprehensive Cancer Center, Duarte, CA, USA; Cancer & Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Hannah Lui Park
- Department of Epidemiology and Biostatistics, University of California, Irvine, CA, USA; Department of Pathology and Laboratory Medicine, University of California, Irvine, CA, USA.
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7
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Chen R, Wang S, Sun Y, Li H, Wan S, Lin F, Xu H. Comparison of Glyphosate-Degradation Ability of Aldo-Keto Reductase (AKR4) Proteins in Maize, Soybean and Rice. Int J Mol Sci 2023; 24:ijms24043421. [PMID: 36834831 PMCID: PMC9966811 DOI: 10.3390/ijms24043421] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/05/2023] [Accepted: 02/07/2023] [Indexed: 02/11/2023] Open
Abstract
Genes that participate in the degradation or isolation of glyphosate in plants are promising, for they endow crops with herbicide tolerance with a low glyphosate residue. Recently, the aldo-keto reductase (AKR4) gene in Echinochloa colona (EcAKR4) was identified as a naturally evolved glyphosate-metabolism enzyme. Here, we compared the glyphosate-degradation ability of theAKR4 proteins from maize, soybean and rice, which belong to a clade containing EcAKR4 in the phylogenetic tree, by incubation of glyphosate with AKR proteins both in vivo and in vitro. The results indicated that, except for OsALR1, the other proteins were characterized as glyphosate-metabolism enzymes, with ZmAKR4 ranked the highest activity, and OsAKR4-1 and OsAKR4-2 exhibiting the highest activity among the AKR4 family in rice. Moreover, OsAKR4-1 was confirmed to endow glyphosate-tolerance at the plant level. Our study provides information on the mechanism underlying the glyphosate-degradation ability of AKR proteins in crops, which enables the development of glyphosate-resistant crops with a low glyphosate residue, mediated by AKRs.
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Affiliation(s)
| | | | | | | | | | - Fei Lin
- Correspondence: (F.L.); (H.X.); Tel.: +86-20-85285127 (H.X.)
| | - Hanhong Xu
- Correspondence: (F.L.); (H.X.); Tel.: +86-20-85285127 (H.X.)
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8
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Li Z, Zhang X, Wang Y, Zheng Z, Zhang C, Wu T, Wu Y, Gao Y, Du F. Improved Method to Characterize Leaf Surfaces, Guide Adjuvant Selection, and Improve Glyphosate Efficacy. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:1348-1359. [PMID: 36629458 DOI: 10.1021/acs.jafc.2c05622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Glyphosate, one of the most widely used herbicides, plays an important role in controlling weeds and ensuring crop production. While using glyphosate, adjuvants are commonly added to improve its deposition on weeds and control efficacy. However, changes in weed leaf surface characteristics may reduce glyphosate penetration and contribute to evolved glyphosate resistance. Therefore, it is significant to introduce an improved method for regularizing leaf surface characterization and guide adjuvant selection to improve glyphosate efficacy. In this work, surface characteristics of typical weed leaves have been systematically investigated by 3D surface analysis and scanning electron microscopy, finally quantified by apparent surface free energy (ASFE) due to its comprehensive and quantitative evaluation of leaf surfaces. Moreover, the relationship between the weed leaf surface characteristics and the retention of glyphosate on weeds was established, further related to the control efficacy against weeds. To maximize the utilization rate of glyphosate, the types and concentrations of adjuvants should be regulated according to the ASFE of weeds. Our findings not only regularize the surface properties of weed leaves but also reveal their influencing mechanism on the deposition and biological activity of glyphosate, which provide effective guidance for the use of glyphosate.
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Affiliation(s)
- Zilu Li
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing100193, China
| | - Xingyu Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing100193, China
| | - Yue Wang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing100193, China
| | - Zirui Zheng
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing100193, China
| | - Chenhui Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing100193, China
| | - Tianyue Wu
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing100193, China
| | - Yanling Wu
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing100193, China
| | - Yuxia Gao
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing100193, China
| | - Fengpei Du
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing100193, China
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9
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Gomes MP, Dos Santos MP, de Freitas PL, Schafaschek AM, de Barros EN, Kitamura RSA, Paulete V, Navarro-Silva MA. The aquatic macrophyte Salvinia molesta mitigates herbicides (glyphosate and aminomethylphosphonic acid) effects to aquatic invertebrates. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:12348-12361. [PMID: 36109480 DOI: 10.1007/s11356-022-23012-w] [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: 12/13/2021] [Accepted: 09/09/2022] [Indexed: 06/15/2023]
Abstract
We evaluated the individual and combined effects of different environmentally representative concentrations of glyphosate (0, 25, 50, 75, and 100 µg l-1) and aminomethylphosphonic acid (AMPA; 0, 12.5, 25, 37.5, and 50 µg l-1) on the physiology of Aedes aegypti larvae, as well as the capacity of the aquatic macrophyte Salvinia molesta to attenuate those compounds' toxicological effects. Larvae of Ae. aegypti (between the third and fourth larval stages) were exposed for 48 h to glyphosate and/or AMPA in the presence or absence of S. molesta. Glyphosate and AMPA induced sublethal responses in Ae. aegypti larvae during acute exposures. Plants removed up to 49% of the glyphosate and 25% of AMPA from the water, resulting in the exposure of larvae to lower concentration of those compounds in relation to media without plants. As a result, lesser effects of glyphosate and/or AMPA were observed on larval acetylcholinesterase, P450 reductase, superoxide dismutase, mitochondrial electron transport chain enzymes, respiration rates, and lipid peroxidation. In addition to evidence of deleterious effects by media contamination with glyphosate and AMPA on aquatic invertebrates, our results attest to the ability of S. molesta plants to mitigate the toxicological impacts of those contaminants.
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Affiliation(s)
- Marcelo Pedrosa Gomes
- Laboratório de Fisiologia de Plantas Sob Estresse, Departamento de Botânica, Setor de Ciências Biológicas, Universidade Federal Do Paraná, Avenida Coronel Francisco H. Dos Santos, 100, Centro Politécnico Jardim das Américas, C.P. 19031, Curitiba, Parana, 81531-980, Brazil.
| | - Mariana Perez Dos Santos
- Laboratório de Morfologia e Fisiologia de Culicidae E Chironomidae Departamento de Zoologia, Setor de Ciências Biológicas, Universidade Federal Do Paraná, Avenida Coronel Francisco H. Dos Santos, 100, Centro Politécnico Jardim das Américas, C.P. 19031, Parana, 81531-980, Curitiba, Brazil
| | - Patricia Lawane de Freitas
- Laboratório de Fisiologia de Plantas Sob Estresse, Departamento de Botânica, Setor de Ciências Biológicas, Universidade Federal Do Paraná, Avenida Coronel Francisco H. Dos Santos, 100, Centro Politécnico Jardim das Américas, C.P. 19031, Curitiba, Parana, 81531-980, Brazil
| | - Ana Marta Schafaschek
- Laboratório de Morfologia e Fisiologia de Culicidae E Chironomidae Departamento de Zoologia, Setor de Ciências Biológicas, Universidade Federal Do Paraná, Avenida Coronel Francisco H. Dos Santos, 100, Centro Politécnico Jardim das Américas, C.P. 19031, Parana, 81531-980, Curitiba, Brazil
| | - Emily Nentwing de Barros
- Laboratório de Morfologia e Fisiologia de Culicidae E Chironomidae Departamento de Zoologia, Setor de Ciências Biológicas, Universidade Federal Do Paraná, Avenida Coronel Francisco H. Dos Santos, 100, Centro Politécnico Jardim das Américas, C.P. 19031, Parana, 81531-980, Curitiba, Brazil
| | - Rafael Shinji Akiyama Kitamura
- Laboratório de Fisiologia de Plantas Sob Estresse, Departamento de Botânica, Setor de Ciências Biológicas, Universidade Federal Do Paraná, Avenida Coronel Francisco H. Dos Santos, 100, Centro Politécnico Jardim das Américas, C.P. 19031, Curitiba, Parana, 81531-980, Brazil
| | - Volnei Paulete
- Departamento de Solos e Engenharia Agrícola, Setor de Ciências Agrárias, Universidade Federal Do Paraná, Rua dos Funcionários, 1540, Cabral, Curitiba, Parana, 80035-050, Brazil
| | - Mario Antônio Navarro-Silva
- Laboratório de Morfologia e Fisiologia de Culicidae E Chironomidae Departamento de Zoologia, Setor de Ciências Biológicas, Universidade Federal Do Paraná, Avenida Coronel Francisco H. Dos Santos, 100, Centro Politécnico Jardim das Américas, C.P. 19031, Parana, 81531-980, Curitiba, Brazil
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10
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Antioxidant Enzyme and Cytochrome P450 Activities Are Involved in Horseweed (Conyza Sumatrensis) Resistance to Glyphosate. STRESSES 2022. [DOI: 10.3390/stresses3010005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The intensive global use of glyphosate has led to the evolution of glyphosate resistant (GR) weed species, including the economically damaging horseweed (Conyza sumatrensis). We evaluated the glyphosate resistance mechanisms of C. sumatrensis. While 5-enolpyruvylshikimate-3-phosphate synthase activity was similar between the glyphosate resistant (GR) and nonresistant biotypes, plants from the GR population accumulated lower shikimate levels than susceptible ones, suggesting the absence of target-site resistance mechanisms. Decreases over time in glyphosate concentrations in GR leaves were not accompanied by increases in glyphosate concentrations in their stem and roots, indicating lower glyphosate distribution rates in GR plants. The early appearance of aminomethylphosphonic acid (the main glyphosate metabolite) in leaves, as well as its presence only in the stems and roots of GR plants, suggests faster glyphosate metabolism in GR plants than in susceptible ones. GR plants treated with glyphosate also showed greater antioxidant (ascorbate peroxidase [APX] and catalase [CAT]) and cytochrome P450-enzyme activities, indicating their great capacity to avoid glyphosate-induced oxidative stress. Three non-target mechanisms (reduced glyphosate translocation, increased metabolism, and increased antioxidant activity) therefore confer glyphosate resistance in C. sumatrensis plants. This is the first time that APX, CAT and P450-enzyme activities are related to GR in C. sumatrensis.
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Chen Y, Chen WJ, Huang Y, Li J, Zhong J, Zhang W, Zou Y, Mishra S, Bhatt P, Chen S. Insights into the microbial degradation and resistance mechanisms of glyphosate. ENVIRONMENTAL RESEARCH 2022; 215:114153. [PMID: 36049517 DOI: 10.1016/j.envres.2022.114153] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/31/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
Glyphosate, as one of the broad-spectrum herbicides for controlling annual and perennial weeds, is widely distributed in various environments and seriously threatens the safety of human beings and ecology. Glyphosate is currently degraded by abiotic and biotic methods, such as adsorption, photolysis, ozone oxidation, and microbial degradation. Of these, microbial degradation has become the most promising method to treat glyphosate because of its high efficiency and environmental protection. Microorganisms are capable of using glyphosate as a phosphorus, nitrogen, or carbon source and subsequently degrade glyphosate into harmless products by cleaving C-N and C-P bonds, in which enzymes and functional genes related to glyphosate degradation play an indispensable role. There have been many studies on the abiotic and biotic treatment technologies, microbial degradation pathways and intermediate products of glyphosate, but the related enzymes and functional genes involved in the glyphosate degradation pathways have not been further discussed. There is little information on the resistance mechanisms of bacteria and fungi to glyphosate, and previous investigations of resistance mechanisms have mainly focused on how bacteria resist glyphosate damage. Therefore, this review explores the microorganisms, enzymes and functional genes related to the microbial degradation of glyphosate and discusses the pathways of microbial degradation and the resistance mechanisms of microorganisms to glyphosate. This review is expected to provide reference for the application and improvement of the microbial degradation of glyphosate in microbial remediation.
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Affiliation(s)
- Yongsheng Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Wen-Juan Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Yaohua Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Jiayi Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Jianfeng Zhong
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Wenping Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Yi Zou
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China
| | - Sandhya Mishra
- Environmental Technologies Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India
| | - Pankaj Bhatt
- Department of Agricultural & Biological Engineering, Purdue University, West Lafayette, 47906, USA.
| | - Shaohua Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China.
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Li H, Yang Y, Hu Y, Chen CC, Huang JW, Min J, Dai L, Guo RT. Structural analysis and engineering of aldo-keto reductase from glyphosate-resistant Echinochloa colona. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129191. [PMID: 35739721 DOI: 10.1016/j.jhazmat.2022.129191] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Glyphosate is a dominant organophosphate herbicide that inhibits 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) of the shikimate pathway. Glyphosate is extensively applied since manufactured, which has led to the emergence of various glyphosate-resistant crops and weeds. However, the molecular mechanism of many glyphosate-resistance machineries remains unclear. Recently, the upregulated expression of two homologous aldo-keto reductases (AKRs), designated as AKR4C16 and AKR4C17, were found to contribute to the glyphosate resistance in Echinochloa colona. This represents the first naturally evolved glyphosate-degrading machinery reported in plants. Here, we report the three-dimensional structure of these two AKR enzymes in complex with cofactor by performing X-ray crystallography. Furthermore, the binding-mode of glyphosate were elucidated in a ternary complex of AKR4C17. Based on the structural information and the previous study, we proposed a possible mechanism of action of AKR-mediated glyphosate degradation. In addition, a variant F291D of AKR4C17 that was constructed based on structure-based engineering showed a 70% increase in glyphosate degradation. In conclusion, these results demonstrate the structural features and glyphosate-binding mode of AKR4C17, which increases our understanding of the enzymatic mechanism of glyphosate bio-degradation and provides an important basis for the designation of AKR-based glyphosate-resistance for further applications.
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Affiliation(s)
- Hao Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Hongshan Laboratory, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Yu Yang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Hongshan Laboratory, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Yumei Hu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Hongshan Laboratory, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Chun-Chi Chen
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Hongshan Laboratory, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Jian-Wen Huang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Hongshan Laboratory, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Jian Min
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Hongshan Laboratory, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China
| | - Longhai Dai
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Hongshan Laboratory, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China.
| | - Rey-Ting Guo
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Hongshan Laboratory, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, PR China.
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Performance and mineral status of laying hens fed diets with different levels of glyphosate. Livest Sci 2022. [DOI: 10.1016/j.livsci.2022.105046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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de Oliveira MVD, Bittencourt Fernandes GM, da Costa KS, Vakal S, Lima AH. Virtual screening of natural products against 5-enolpyruvylshikimate-3-phosphate synthase using the Anagreen herbicide-like natural compound library. RSC Adv 2022; 12:18834-18847. [PMID: 35873314 PMCID: PMC9240924 DOI: 10.1039/d2ra02645g] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 06/14/2022] [Indexed: 11/21/2022] Open
Abstract
The shikimate pathway enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) catalyzes a reaction involved in the production of amino acids essential for plant growth and survival. EPSPS is the main target of glyphosate, a broad-spectrum herbicide that acts as a competitive inhibitor concerning phosphoenolpyruvate (PEP), which is the natural substrate of EPSPS. In the present study, we introduce a natural compound library, named Anagreen, which is a compendium of herbicide-like compounds obtained from different natural product databases. Herein, we combined the structure- and ligand-based virtual screening strategies to explore Anagreen against EPSPS using the structure of glyphosate complexed with a T102I/P106S mutant of EPSPS from Eleusine indica (EiEPSPS) as a starting point. First, ligand-based pharmacophore screening was performed to select compounds with a similar pharmacophore to glyphosate. Then, structure-based pharmacophore modeling was applied to build a model which represents the molecular features of glyphosate. Then, consensus docking was performed to rank the best poses of the natural compounds against the PEP binding site, and then molecular dynamics simulations were performed to analyze the stability of EPSPS complexed with the selected ligands. Finally, we have investigated the binding affinity of the complexes using free energy calculations. The selected hit compound, namely AG332841, showed a stable conformation and binding affinity to the EPSPS structure and showed no structural similarity to the already known weed EPSPS inhibitors. Our computational study aims to clarify the inhibition of the mutant EiEPSPS, which is resistant to glyphosate, and identify new potential herbicides from natural products.
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Affiliation(s)
- Maycon Vinicius Damasceno de Oliveira
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará 66075-110 Belém Pará Brazil
| | - Gilson Mateus Bittencourt Fernandes
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará 66075-110 Belém Pará Brazil
| | - Kauê S da Costa
- Institute of Biodiversity, Federal University of Western Pará Santarém Pará Brazil
| | - Serhii Vakal
- Structural Bioinformatics Laboratory, Biochemistry, Faculty of Science and Engineering, Åbo Akademi University Turku Finland
| | - Anderson H Lima
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará 66075-110 Belém Pará Brazil
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Sesin V, Freeland JR, Gilbert JM, Stevens KJ, Davy CM. Legacies of invasive plant management: effects of leaching from glyphosate-treated and untreated plants on germination and early growth of native macrophytes. Biol Invasions 2022. [DOI: 10.1007/s10530-022-02794-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Pacheco de Almeida Prado Bortolheiro F, de Almeida Silva M. Low doses of glyphosate can affect the nutrient composition of common beans depending on the sowing season. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 794:148733. [PMID: 34217079 DOI: 10.1016/j.scitotenv.2021.148733] [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: 03/03/2021] [Revised: 06/22/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
Glyphosate application, even in low doses, changes the nutrient composition of crops. The objective of this research was to evaluate the effects of low doses of glyphosate and the sowing season on the macronutrient and micronutrient contents of early cycle common beans. Two experiments were conducted in the field, namely one in the winter season and one in the wet season, using the early cycle common bean cultivar IAC Imperador. The experimental design was a randomized complete block design consisting of the application of low doses of glyphosate [0.0, 1.8, 7.2, 12.0, 36.0, 54.0, and 108.0 g acid equivalent (a.e.) ha-1] in the phenological stage V4 with four replications. Environmental conditions, such as air temperature, interfered with the response of early cycle common beans to low doses of glyphosate. In the winter season, doses of 7.2 g a.e. ha-1 and 36.0 g a.e. ha-1 increased the nutrient composition in the bean leaves, whereas only the Cu content increased in the grains by the dose of 1.8 g a.e. ha-1. In the wet season, there was no increase in the nutrient composition in the bean leaves. The Cu, Zn, Mn, and Fe contents in the grains increased with from the dose of 12 g a.e. ha-1 to above the amount normally observed in common beans, thereby improving the nutritional quality of the food. Our study indicated that low doses of glyphosate alter the nutrient composition of common beans, whereas environmental conditions interfere with the response of common beans to low doses of glyphosate.
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Affiliation(s)
| | - Marcelo de Almeida Silva
- Laboratory of Ecophysiology Applied to Agriculture (LECA), School of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, SP, Brazil.
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Domínguez-Valenzuela JA, Alcántara-de la Cruz R, Palma-Bautista C, Vázquez-García JG, Cruz-Hipolito HE, De Prado R. Non-Target Site Mechanisms Endow Resistance to Glyphosate in Saltmarsh Aster (Aster squamatus). PLANTS 2021; 10:plants10091970. [PMID: 34579501 PMCID: PMC8470777 DOI: 10.3390/plants10091970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/16/2021] [Accepted: 09/17/2021] [Indexed: 11/17/2022]
Abstract
Of the six-glyphosate resistant weed species reported in Mexico, five were found in citrus groves. Here, the glyphosate susceptibility level and resistance mechanisms were evaluated in saltmarsh aster (Aster squamatus), a weed that also occurs in Mexican citrus groves. The R population accumulated 4.5-fold less shikimic acid than S population. S plants hardly survived at 125 g ae ha−1 while most of the R plants that were treated with 1000 g ae ha−1, which suffered a strong growth arrest, showed a vigorous regrowth from the third week after treatment. Further, 5-enolpyruvylshikimate-3-phosphate basal and enzymatic activities did not diverge between populations, suggesting the absence of target-site resistance mechanisms. At 96 h after treatment, R plants absorbed ~18% less glyphosate and maintained 63% of the 14C-glyphsoate absorbed in the treated leaf in comparison to S plants. R plants metabolized twice as much (72%) glyphosate to amino methyl phosphonic acid and glyoxylate as the S plants. Three non-target mechanisms, reduced absorption and translocation and increased metabolism, confer glyphosate resistance saltmarsh aster. This is the first case of glyphosate resistance recorded for A. squamatus in the world.
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Affiliation(s)
- José Alfredo Domínguez-Valenzuela
- Departamento de Parasitología Agrícola, Universidad Autónoma Chapingo, Texcoco 56230, Mexico
- Correspondence: (J.A.D.-V.); (R.A.-d.l.C.)
| | - Ricardo Alcántara-de la Cruz
- Centro de Ciências da Natureza, Universidade Federal de São Carlos–Campus Lagoa do Sino, Buri 18290-000, Brazil
- Correspondence: (J.A.D.-V.); (R.A.-d.l.C.)
| | - Candelario Palma-Bautista
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 14014 Córdoba, Spain; (C.P.-B.); (J.G.V.-G.); (H.E.C.-H.); (R.D.P.)
| | - José Guadalupe Vázquez-García
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 14014 Córdoba, Spain; (C.P.-B.); (J.G.V.-G.); (H.E.C.-H.); (R.D.P.)
| | - Hugo E. Cruz-Hipolito
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 14014 Córdoba, Spain; (C.P.-B.); (J.G.V.-G.); (H.E.C.-H.); (R.D.P.)
| | - Rafael De Prado
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 14014 Córdoba, Spain; (C.P.-B.); (J.G.V.-G.); (H.E.C.-H.); (R.D.P.)
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Marques JGDC, Veríssimo KJDS, Fernandes BS, Ferreira SRDM, Montenegro SMGL, Motteran F. Glyphosate: A Review on the Current Environmental Impacts from a Brazilian Perspective. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 107:385-397. [PMID: 34142191 DOI: 10.1007/s00128-021-03295-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 06/09/2021] [Indexed: 06/12/2023]
Abstract
The indiscriminate use of glyphosate is one of the main agricultural practices to combat weeds and grasses; however, its incorrect application increases soil and water contamination caused by the product. This situation is even more critical due to its great versatility for use in different cultivars and at lower prices, making it the most used pesticide in the world. Nevertheless, there is still a lack of in-depth studies regarding the damage that its use may cause. Therefore, this review focused on the analysis of environmental impacts at the soil-water interface caused by the use of glyphosate. In this sense, studies have shown that the intensive use of glyphosate has the potential to cause harmful effects on soil microorganisms, leading to changes in soil fertility and ecological imbalance, as well as impacts on aquatic environments derived from changes in the food chain. This situation is similar in Brazil, with the harmful effects of glyphosate in nontarget species and the contamination of the atmosphere. Therefore, it is necessary to change this scenario by modifying the type of pest control in agriculture, and actions such as crop rotation and biological control.
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Affiliation(s)
- Jonathas Gomes de Carvalho Marques
- Department of Civil Engineering, Federal University of Pernambuco - UFPE. Rua Acadêmico Hélio Ramos, s/n, Cidade Universitária, Recife, PE, 50740-530, Brazil.
| | - Klayde Janny da Silva Veríssimo
- Department of Civil Engineering, Federal University of Pernambuco - UFPE. Rua Acadêmico Hélio Ramos, s/n, Cidade Universitária, Recife, PE, 50740-530, Brazil
| | - Bruna Soares Fernandes
- Department of Civil Engineering, Federal University of Pernambuco - UFPE. Rua Acadêmico Hélio Ramos, s/n, Cidade Universitária, Recife, PE, 50740-530, Brazil
| | - Silvio Romero de Melo Ferreira
- Department of Civil Engineering, Federal University of Pernambuco - UFPE. Rua Acadêmico Hélio Ramos, s/n, Cidade Universitária, Recife, PE, 50740-530, Brazil
| | - Suzana Maria Gico Lima Montenegro
- Department of Civil Engineering, Federal University of Pernambuco - UFPE. Rua Acadêmico Hélio Ramos, s/n, Cidade Universitária, Recife, PE, 50740-530, Brazil
| | - Fabrício Motteran
- Department of Civil Engineering, Federal University of Pernambuco - UFPE. Rua Acadêmico Hélio Ramos, s/n, Cidade Universitária, Recife, PE, 50740-530, Brazil
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Hertel R, Gibhardt J, Martienssen M, Kuhn R, Commichau FM. Molecular mechanisms underlying glyphosate resistance in bacteria. Environ Microbiol 2021; 23:2891-2905. [PMID: 33876549 DOI: 10.1111/1462-2920.15534] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/10/2021] [Accepted: 04/14/2021] [Indexed: 11/29/2022]
Abstract
Glyphosate is a nonselective herbicide that kills weeds and other plants competing with crops. Glyphosate specifically inhibits the 5-enolpyruvyl-shikimate-3-phosphate (EPSP) synthase, thereby depleting the cell of EPSP serving as a precursor for biosynthesis of aromatic amino acids. Glyphosate is considered to be toxicologically safe for animals and humans. Therefore, it became the most-important herbicide in agriculture. However, its intensive application in agriculture is a serious environmental issue because it may negatively affect the biodiversity. A few years after the discovery of the mode of action of glyphosate, it has been observed that bacteria evolve glyphosate resistance by acquiring mutations in the EPSP synthase gene, rendering the encoded enzyme less sensitive to the herbicide. The identification of glyphosate-resistant EPSP synthase variants paved the way for engineering crops tolerating increased amounts of the herbicide. This review intends to summarize the molecular mechanisms underlying glyphosate resistance in bacteria. Bacteria can evolve glyphosate resistance by (i) reducing glyphosate sensitivity or elevating production of the EPSP synthase, by (ii) degrading or (iii) detoxifying glyphosate and by (iv) decreasing the uptake or increasing the export of the herbicide. The variety of glyphosate resistance mechanisms illustrates the adaptability of bacteria to anthropogenic substances due to genomic alterations.
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Affiliation(s)
- Robert Hertel
- FG Synthetic Microbiology, Institute for Biotechnology, BTU Cottbus-Senftenberg, Senftenberg, 01968, Germany
| | - Johannes Gibhardt
- FG Synthetic Microbiology, Institute for Biotechnology, BTU Cottbus-Senftenberg, Senftenberg, 01968, Germany
| | - Marion Martienssen
- Institute of Environmental Technology, Chair of Biotechnology of Water Treatment, BTU Cottbus-Senftenberg, Cottbus, 03046, Germany
| | - Ramona Kuhn
- Institute of Environmental Technology, Chair of Biotechnology of Water Treatment, BTU Cottbus-Senftenberg, Cottbus, 03046, Germany
| | - Fabian M Commichau
- FG Synthetic Microbiology, Institute for Biotechnology, BTU Cottbus-Senftenberg, Senftenberg, 01968, Germany
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Franke AA, Li X, Shvetsov YB, Lai JF. Pilot study on the urinary excretion of the glyphosate metabolite aminomethylphosphonic acid and breast cancer risk: The Multiethnic Cohort study. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 277:116848. [PMID: 33714786 PMCID: PMC8044054 DOI: 10.1016/j.envpol.2021.116848] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 02/24/2021] [Accepted: 02/25/2021] [Indexed: 05/08/2023]
Abstract
Breast cancer is the most commonly diagnosed female cancer and the second leading cause of death in women in the US, including Hawaii. Accumulating evidence suggests that aminomethylphosphonic acid (AMPA), the primary metabolite of the herbicide glyphosate-a probable human carcinogen, may itself be carcinogenic. However, the relationship between urinary AMPA excretion and breast cancer risk in women is unknown. In this pilot study, we investigated the association between pre-diagnostic urinary AMPA excretion and breast cancer risk in a case-control study of 250 predominantly postmenopausal women: 124 cases and 126 healthy controls (individually matched on age, race/ethnicity, urine type, date of urine collection, and fasting status) nested within the Hawaii biospecimen subcohort of the Multiethnic Cohort. AMPA was detected in 90% of cases and 84% of controls. The geometric mean of urinary AMPA excretion was nearly 38% higher among cases vs. controls (0.087 vs 0.063 ng AMPA/mg creatinine) after adjusting for race/ethnicity, age and BMI. A 4.5-fold higher risk of developing breast cancer in the highest vs. lowest quintile of AMPA excretion was observed (ORQ5 vs. Q1: 4.49; 95% CI: 1.46-13.77; ptrend = 0.029). To our knowledge, this is the first study to prospectively examine associations between urinary AMPA excretion and breast cancer risk. Our preliminary findings suggest that AMPA exposure may be associated with increased breast cancer risk; however, these results require confirmation in a larger population to increase study power and permit careful examinations of race/ethnicity differences.
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Affiliation(s)
- Adrian A Franke
- University of Hawaii Cancer Center, Cancer Biology Program, USA.
| | - Xingnan Li
- University of Hawaii Cancer Center, Cancer Biology Program, USA
| | | | - Jennifer F Lai
- University of Hawaii Cancer Center, Cancer Biology Program, USA
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21
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Muñoz JP, Bleak TC, Calaf GM. Glyphosate and the key characteristics of an endocrine disruptor: A review. CHEMOSPHERE 2021; 270:128619. [PMID: 33131751 DOI: 10.1016/j.chemosphere.2020.128619] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 09/30/2020] [Accepted: 10/12/2020] [Indexed: 05/27/2023]
Abstract
Glyphosate is a large-spectrum herbicide that was introduced on the market in 1974. Due to its important impact on the crop industry, it has been significantly diversified and expanded being considered the most successful herbicide in history. Currently, its massive use has led to a wide environmental diffusion and its human consumption through food products has made possible to detect it in urine, serum, and breast milk samples. Nevertheless, recent studies have questioned its safety and international agencies have conflicting opinions about its effects on human health, mainly as an endocrine-disrupting chemical (EDC) and its carcinogenic capacity. Here, we conduct a comprehensive review where we describe the most important findings of the glyphosate effects in the endocrine system and asses the mechanistic evidence to classify it as an EDC. We use as guideline the ten key characteristics (KCs) of EDC proposed in the expert consensus statement published in 2020 (La Merrill et al., 2020) and discuss the scopes of some epidemiological studies for the evaluation of glyphosate as possible EDC. We conclude that glyphosate satisfies at least 8 KCs of an EDC, however, prospective cohort studies are still needed to elucidate the real effects in the human endocrine system.
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Affiliation(s)
- Juan P Muñoz
- Instituto de Alta Investigación (IAI), Universidad de Tarapacá, Antofagasta 1520, Arica, 1000000, Chile.
| | - Tammy C Bleak
- Instituto de Alta Investigación (IAI), Universidad de Tarapacá, Antofagasta 1520, Arica, 1000000, Chile.
| | - Gloria M Calaf
- Instituto de Alta Investigación (IAI), Universidad de Tarapacá, Antofagasta 1520, Arica, 1000000, Chile; Center for Radiological Research, VC11-218, Columbia University Medical Center, 630 West 168th Street, New York, NY, 10032, USA.
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22
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Limon AW, Moingt M, Widory D. The carbon stable isotope compositions of glyphosate and aminomethylphosphonic acid (AMPA): Improved analytical sensitivity and first application to environmental water matrices. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2021; 35:e9017. [PMID: 33270272 DOI: 10.1002/rcm.9017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/01/2020] [Accepted: 12/02/2020] [Indexed: 06/12/2023]
Abstract
RATIONALE The presence of glyphosate and its degradation product aminomethylphosphonic acid (AMPA) in the environment has adverse effects on environmental quality, raising the need to better constrain their fates, in particular the processes that control their production and degradation. Our aim was to improve the sensitivity of their δ13 C analysis and demonstrate the feasibility of measuring them in natural surface water. METHODS The δ13 C values of dissolved glyphosate and AMPA were determined using isotope ratio mass spectrometry (IRMS) (Delta V Plus instrument) coupled to a high-performance liquid chromatography (HPLC) unit, where glyphosate and AMPA were separated on a Hypercarb column. RESULTS We demonstrated an improved sensitivity of the δ13 C analysis for glyphosate and AMPA by LC/IRMS compared with previous studies. For waters from the carbonate and silicate hydrofacies, while no pretreatment was required for the isotope analysis of glyphosate, removal by H3 PO4 acidification of dissolved inorganic carbon, that co-elutes with AMPA, was required prior to its analysis. We successfully tested a freeze-drying pre-concentration method showing no associated isotope fractionation up to concentration factors of 500 and 50 for glyphosate and AMPA, respectively. CONCLUSIONS We demonstrated, for the first time, the feasibility of measuring the δ13 C values of glyphosate and AMPA in natural surface waters with contrasted hydrofacies (calcium carbonate and silicate types). This opens new fields in pesticide research, especially on the characterization of processes that control their degradation and the production of their secondary byproducts.
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Affiliation(s)
- A Williams Limon
- GEOTOP/Université du Québec à Montréal, case postale 8888, , Montréal, QC, H3C 3P8, Canada
| | - Matthieu Moingt
- GEOTOP/Université du Québec à Montréal, case postale 8888, , Montréal, QC, H3C 3P8, Canada
| | - David Widory
- GEOTOP/Université du Québec à Montréal, case postale 8888, , Montréal, QC, H3C 3P8, Canada
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23
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Bienvenu JF, Bélanger P, Gaudreau É, Provencher G, Fleury N. Determination of glyphosate, glufosinate and their major metabolites in urine by the UPLC-MS/MS method applicable to biomonitoring and epidemiological studies. Anal Bioanal Chem 2021; 413:2225-2234. [PMID: 33547480 DOI: 10.1007/s00216-021-03194-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 01/12/2021] [Accepted: 01/23/2021] [Indexed: 10/22/2022]
Abstract
The preoccupation concerning glyphosate (GLYP) has rapidly grown over recent years, and the availability of genetically modified crops that are resistant to GLYP or glufosinate (GLUF) has increased the use of these herbicides. The debate surrounding the carcinogenicity of GLYP has raised interest and the desire to gain information on the level of exposure of the population. GLYP and aminomethylphosphonic acid (AMPA) are commonly simultaneously analysed. GLUF is sometimes also monitored, but its major metabolite, 3-[hydroxy(methyl)phosphinoyl]propionic acid (3MPPA), is rarely present in the method. Using a pentafluorobenzyl derivative to extract the analytes from human urine, we present a method that contains four important analytes to monitor human exposure to GLYP and GLUF. The use of the flash freeze technique speeds up the extraction process and requires less organic solvent than conventional liquid-liquid extraction. The limits of detection in the low μg/L range enable the use of this method for epidemiological studies. The results obtained for 35 volunteers from the Quebec City area are presented with the results from multiple interlaboratory comparisons (G-EQUAS, HBM4EU and OSEQAS). This methodology is currently being used in the Maternal-Infant Research on Environmental Chemicals (MIREC-ENDO) study and in the Canadian Health Measures Survey (CHMS).
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Affiliation(s)
- Jean-François Bienvenu
- Centre de Toxicologie du Québec (CTQ), Institut national de santé publique du Québec (INSPQ), 945, avenue Wolfe, Québec, QC, G1V 5B3, Canada.
| | - Patrick Bélanger
- Centre de Toxicologie du Québec (CTQ), Institut national de santé publique du Québec (INSPQ), 945, avenue Wolfe, Québec, QC, G1V 5B3, Canada
| | - Éric Gaudreau
- Centre de Toxicologie du Québec (CTQ), Institut national de santé publique du Québec (INSPQ), 945, avenue Wolfe, Québec, QC, G1V 5B3, Canada
| | - Gilles Provencher
- Centre de Toxicologie du Québec (CTQ), Institut national de santé publique du Québec (INSPQ), 945, avenue Wolfe, Québec, QC, G1V 5B3, Canada
| | - Normand Fleury
- Centre de Toxicologie du Québec (CTQ), Institut national de santé publique du Québec (INSPQ), 945, avenue Wolfe, Québec, QC, G1V 5B3, Canada
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24
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Vázquez-García JG, Rojano-Delgado AM, Alcántara-de la Cruz R, Torra J, Dellaferrera I, Portugal J, De Prado R. Distribution of Glyphosate-Resistance in Echinochloa crus-galli Across Agriculture Areas in the Iberian Peninsula. FRONTIERS IN PLANT SCIENCE 2021; 12:617040. [PMID: 33679831 PMCID: PMC7928338 DOI: 10.3389/fpls.2021.617040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
The levels of resistance to glyphosate of 13 barnyard grass (Echinochloa crus-galli) populations harvested across different agriculture areas in the Southern Iberian Peninsula were determined in greenhouse and laboratory experiments. Shikimate accumulation fast screening separated the populations regarding resistance to glyphosate: susceptible (S) E2, E3, E4, and E6 and resistant (R) E1, E5, E7, E8, E9, E10, E11, E12, and E13. However, resistance factor (GR50 E1-E13/GR50 E6) values separated these populations into three groups: (S) E2, E3, E4, and E6, (R) E1, E5, E7, E8, and E9, and very resistant (VR) E10, E11, E12, and E13. 14C-glyphosate assays performed on two S populations (E2 and E6) showed greater absorption and translocation than those found for R (E7 and E9) and VR (E10 and E12) populations. No previous population metabolized glyphosate to amino methyl phosphonic acid (AMPA) and glyoxylate, except for the E10 population that metabolized 51% to non-toxic products. The VR populations showed two times more 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) activity without herbicide than the rest, while the inhibition of the EPSPS activity by 50% (I50) required much higher glyphosate in R and VR populations than in S populations. These results indicated that different target-site and non-target-site resistance mechanisms were implicated in the resistance to glyphosate in E. crus-galli. Our results conclude that resistance is independent of climate, type of crop, and geographic region and that the level of glyphosate resistance was mainly due to the selection pressure made by the herbicide on the different populations of E. crus-galli studied.
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Affiliation(s)
- José G. Vázquez-García
- Department of Agricultural Chemistry and Edaphology, University of Córdoba, Córdoba, Spain
| | | | | | - Joel Torra
- Department d’Hortofruticultura, Botànica i Jardineria, Agrotecnio, Universitat de Lleida, Lleida, Spain
| | - Ignacio Dellaferrera
- Faculty of Agricultural Sciences, National University of the Litoral, Esperanza, Argentina
- National Scientific and Technical Research Council, Godoy Cruz, Argentina
| | - João Portugal
- Biosciences Department, Polytechnic Institute of Beja, Beja, Portugal
- VALORIZA-Research Centre for Endogenous Resource Valorization, Polytechnic Institute of Portalegre, Portalegre, Portugal
| | - Rafael De Prado
- Department of Agricultural Chemistry and Edaphology, University of Córdoba, Córdoba, Spain
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25
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Hu J, Lesseur C, Miao Y, Manservisi F, Panzacchi S, Mandrioli D, Belpoggi F, Chen J, Petrick L. Low-dose exposure of glyphosate-based herbicides disrupt the urine metabolome and its interaction with gut microbiota. Sci Rep 2021; 11:3265. [PMID: 33547360 PMCID: PMC7864973 DOI: 10.1038/s41598-021-82552-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 01/15/2021] [Indexed: 12/11/2022] Open
Abstract
Glyphosate-based herbicides (GBHs) can disrupt the host microbiota and influence human health. In this study, we explored the potential effects of GBHs on urinary metabolites and their interactions with gut microbiome using a rodent model. Glyphosate and Roundup (equal molar for glyphosate) were administered at the USA glyphosate ADI guideline (1.75 mg/kg bw/day) to the dams and their pups. The urine metabolites were profiled using non-targeted liquid chromatography-high resolution mass spectrometry (LC-HRMS). Our results found that overall urine metabolite profiles significantly differed between dams and pups and between female and male pups. Specifically, we identified a significant increase of homocysteine, a known risk factor of cardiovascular disease in both Roundup and glyphosate exposed pups, but in males only. Correlation network analysis between gut microbiome and urine metabolome pointed to Prevotella to be negatively correlated with the level of homocysteine. Our study provides initial evidence that exposures to commonly used GBH, at a currently acceptable human exposure dose, is capable of modifying urine metabolites in both rat adults and pups. The link between Prevotella-homocysteine suggests the potential role of GBHs in modifying the susceptibility of homocysteine, which is a metabolite that has been dysregulated in related diseases like cardiovascular disease or inflammation, through commensal microbiome.
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Affiliation(s)
- Jianzhong Hu
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY, USA.
| | - Corina Lesseur
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY, USA
| | - Yu Miao
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY, USA
| | - Fabiana Manservisi
- Cesare Maltoni Cancer Research Center (CMCRC), Ramazzini Institute (RI), Bentivoglio, Bologna, Italy
- Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy
| | - Simona Panzacchi
- Cesare Maltoni Cancer Research Center (CMCRC), Ramazzini Institute (RI), Bentivoglio, Bologna, Italy
| | - Daniele Mandrioli
- Cesare Maltoni Cancer Research Center (CMCRC), Ramazzini Institute (RI), Bentivoglio, Bologna, Italy
- Department of Agricultural Sciences, University of Bologna, Bologna, Italy
| | - Fiorella Belpoggi
- Cesare Maltoni Cancer Research Center (CMCRC), Ramazzini Institute (RI), Bentivoglio, Bologna, Italy
| | - Jia Chen
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY, USA
| | - Lauren Petrick
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY, USA.
- Institute for Exposomics Research, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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26
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Duke SO. Glyphosate: Uses Other Than in Glyphosate-Resistant Crops, Mode of Action, Degradation in Plants, and Effects on Non-target Plants and Agricultural Microbes. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 255:1-65. [PMID: 33895876 DOI: 10.1007/398_2020_53] [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] [Indexed: 05/27/2023]
Abstract
Glyphosate is the most used herbicide globally. It is a unique non-selective herbicide with a mode of action that is ideal for vegetation management in both agricultural and non-agricultural settings. Its use was more than doubled by the introduction of transgenic, glyphosate-resistant (GR) crops. All of its phytotoxic effects are the result of inhibition of only 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), but inhibition of this single enzyme of the shikimate pathway results in multiple phytotoxicity effects, both upstream and downstream from EPSPS, including loss of plant defenses against pathogens. Degradation of glyphosate in plants and microbes is predominantly by a glyphosate oxidoreductase to produce aminomethylphosphonic acid and glyoxylate and to a lesser extent by a C-P lyase to produce sarcosine and phosphate. Its effects on non-target plant species are generally less than that of many other herbicides, as it is not volatile and is generally sprayed in larger droplet sizes with a relatively low propensity to drift and is inactivated by tight binding to most soils. Some microbes, including fungal plant pathogens, have glyphosate-sensitive EPSPS. Thus, glyphosate can benefit GR crops by its activity on some plant pathogens. On the other hand, glyphosate can adversely affect some microbes that are beneficial to agriculture, such as Bradyrhizobium species, although GR crop yield data indicate that such an effect has been minor. Effects of glyphosate on microbes of agricultural soils are generally minor and transient, with other agricultural practices having much stronger effects.
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Affiliation(s)
- Stephen O Duke
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, USA.
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27
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Baek Y, Bobadilla LK, Giacomini DA, Montgomery JS, Murphy BP, Tranel PJ. Evolution of Glyphosate-Resistant Weeds. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 255:93-128. [PMID: 33932185 DOI: 10.1007/398_2020_55] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Widespread adoption of glyphosate-resistant crops and concomitant reliance on glyphosate for weed control set an unprecedented stage for the evolution of herbicide-resistant weeds. There are now 48 weed species that have evolved glyphosate resistance. Diverse glyphosate-resistance mechanisms have evolved, including single, double, and triple amino acid substitutions in the target-site gene, duplication of the gene encoding the target site, and others that are rare or nonexistent for evolved resistance to other herbicides. This review summarizes these resistance mechanisms, discusses what is known about their evolution, and concludes with some of the impacts glyphosate-resistant weeds have had on weed management.
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Affiliation(s)
- Yousoon Baek
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | - Lucas K Bobadilla
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | - Darci A Giacomini
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | | | - Brent P Murphy
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | - Patrick J Tranel
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA.
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28
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Green JM, Siehl DL. History and Outlook for Glyphosate-Resistant Crops. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 255:67-91. [PMID: 34109481 DOI: 10.1007/398_2020_54] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Glyphosate-resistant (GR) crops, commercially referred to as glyphosate-tolerant (GT), started the revolution in crop biotechnology in 1996. Growers rapidly accepted GR crops whenever they became available and made them the most rapidly adopted technology in agriculture history. Adoption usually meant sole reliance on glyphosate [N-(phosphonomethyl)glycine, CAS No. 1071-83-6] for weed control. Not surprisingly, weeds eventually evolved resistance and are forcing growers to change their weed management practices. Today, the widespread dissemination of GR weeds that are also resistant to other herbicide modes-of-action (MoA) has greatly reduced the value of the GR crop weed management systems. However, growers continue to use the technology widely in six major crops throughout North and South America. Integrated chemistry and seed providers seek to sustain glyphosate efficacy by promoting glyphosate combinations with other herbicides and stacking the traits necessary to enable the use of partner herbicides. These include glufosinate {4-[hydroxy(methyl)phosphinoyl]-DL-homoalanine, CAS No. 51276-47-2}, dicamba (3,6-dichloro-2-methoxybenzoic acid, CAS No. 1918-00-9), 2,4-D [2-(2,4-dichlorophenoxy)acetic acid, CAS No. 94-75-7], 4-hydroxyphenyl pyruvate dioxygenase inhibitors, acetyl coenzyme A carboxylase (ACCase) inhibitors, and other herbicides. Unfortunately, herbicide companies have not commercialized a new MoA for over 30 years and have nearly exhausted the useful herbicide trait possibilities. Today, glyphosate-based crop systems are still mainstays of weed management, but they cannot keep up with the capacity of weeds to evolve resistance. Growers desperately need new technologies, but no technology with the impact of glyphosate and GR crops is on the horizon. Although the expansion of GR crop traits is possible into new geographic areas and crops such as wheat and sugarcane and could have high value, the Roundup Ready® revolution is over. Its future is at a nexus and dependent on a variety of issues.
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Affiliation(s)
| | - Daniel L Siehl
- Sr. Scientist (ret.), Corteva Agriscience, Wilmington, DE, USA
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29
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Qiao C, Wang C, Pang R, Tian F, Han L, Guo L, Luo J, Li J, Pang T, Xie H, Fang J. Environmental behavior and influencing factors of glyphosate in peach orchard ecosystem. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 206:111209. [PMID: 32891912 DOI: 10.1016/j.ecoenv.2020.111209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/21/2020] [Accepted: 08/21/2020] [Indexed: 06/11/2023]
Abstract
In this paper, several experiments were carried out to study the environmental behavior and influencing factors of glyphosate (PMG) in peach orchard ecosystem. The results of field experiments showed that PMG and its metabolite aminomethylphosphonic acid (AMPA) were detected in peach tree leaves and peach tree fruits, although PMG was only sprayed on the soil. The residues of PMG and AMPA in peach tree leaves were ~0.1 mg/kg and ~0.5 mg/kg and in peach tree fruits were ~0.01 mg/kg and 0.07-0.11 mg/kg, respectively. By conducting a series of laboratory simulation experiments, the environmental factors affecting the degradation of PMG were screened and evaluated. The results showed that PMG metabolized much faster in loess soil than red soil and black soil (with the DT50 of 11.6 days, 62.4 days, and 34.1 days, respectively). By analyzing the basic properties of the soil, we investigated the effects of pH, moisture content, organic matter (exogenous biochar) and ambient temperature using orthogonal experiments, and the results were further confirmed by microbial experiment. The results showed that alkaline conditions (pH = 7.8/9), high water content (25%) and microorganisms could promote the degradation of PMG. Sterile soil environment had a negative impact on the metabolic behavior of PMG to AMPA.
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Affiliation(s)
- Chengkui Qiao
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Caixia Wang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Rongli Pang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Fajun Tian
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Lijun Han
- College of Science, China Agricultural University, Beijing, 100193, China
| | - Linlin Guo
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Jing Luo
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Jun Li
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Tao Pang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Hanzhong Xie
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China.
| | - Jinbao Fang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China.
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30
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Franke AA, Li X, Lai JF. Analysis of glyphosate, aminomethylphosphonic acid, and glufosinate from human urine by HRAM LC-MS. Anal Bioanal Chem 2020; 412:8313-8324. [PMID: 33011839 PMCID: PMC8061706 DOI: 10.1007/s00216-020-02966-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 08/26/2020] [Accepted: 09/22/2020] [Indexed: 11/29/2022]
Abstract
Aminomethylphosphonic acid (AMPA) is the main metabolite of glyphosate (GLYP) and phosphonic acids in detergents. GLYP is a synthetic herbicide frequently used worldwide alone or together with its analog glufosinate (GLUF). The general public can be exposed to these potentially harmful chemicals; thus, sensitive methods to monitor them in humans are urgently required to evaluate health risks. We attempted to simultaneously detect GLYP, AMPA, and GLUF in human urine by high-resolution accurate-mass liquid chromatography mass spectrometry (HRAM LC-MS) before and after derivatization with 9-fluorenylmethoxycarbonyl chloride (Fmoc-Cl) or 1-methylimidazole-sulfonyl chloride (ImS-Cl) with several urine pre-treatment and solid phase extraction (SPE) steps. Fmoc-Cl derivatization achieved the best combination of method sensitivity (limit of detection; LOD) and accuracy for all compounds compared to underivatized urine or ImS-Cl-derivatized urine. Before derivatization, the best steps for GLYP involved 0.4 mM ethylenediaminetetraacetic acid (EDTA) pre-treatment followed by SPE pre-cleanup (LOD 37 pg/mL), for AMPA involved no EDTA pre-treatment and no SPE pre-cleanup (LOD 20 pg/mL) or 0.2-0.4 mM EDTA pre-treatment with no SPE pre-cleanup (LOD 19-21 pg/mL), and for GLUF involved 0.4 mM EDTA pre-treatment and no SPE pre-cleanup (LOD 7 pg/mL). However, for these methods, accuracy was sufficient only for AMPA (101-105%), while being modest for GLYP (61%) and GLUF (63%). Different EDTA and SPE treatments prior to Fmoc-Cl derivatization resulted in high sensitivity for all analytes but satisfactory accuracy only for AMPA. Thus, we conclude that our HRAM LC-MS method is suited for urinary AMPA analysis in cross-sectional studies.
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Affiliation(s)
- Adrian A Franke
- University of Hawaii Cancer Center, Analytical Biochemistry Shared Resource, 701 Ilalo Street, Honolulu, HI, 96813, USA.
| | - Xingnan Li
- University of Hawaii Cancer Center, Analytical Biochemistry Shared Resource, 701 Ilalo Street, Honolulu, HI, 96813, USA
| | - Jennifer F Lai
- University of Hawaii Cancer Center, Analytical Biochemistry Shared Resource, 701 Ilalo Street, Honolulu, HI, 96813, USA
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31
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Jarrell ZR, Ahammad MU, Benson AP. Glyphosate-based herbicide formulations and reproductive toxicity in animals. Vet Anim Sci 2020; 10:100126. [PMID: 32734026 PMCID: PMC7386766 DOI: 10.1016/j.vas.2020.100126] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 06/17/2020] [Accepted: 06/18/2020] [Indexed: 01/16/2023] Open
Abstract
The adoption of genetically engineered (GE) crops in agriculture has increased dramatically over the last few decades. Among the transgenic plants, those tolerant to the herbicide glyphosate are among the most common. Weed resistance to glyphosate-based herbicides (GBHs) has been on the rise, leading to increased herbicide applications. This, in turn, has led to increased glyphosate residues in feed. Although glyphosate has been considered to be generally safe to animal health, recent studies have shown that GBHs have potential to cause adverse effects in animal reproduction, including disruption of key regulatory enzymes in androgen synthesis, alteration of serum levels of estrogen and testosterone, damage to reproductive tissues and impairment of gametogenesis. This review emphasizes known effects of GBHs on reproductive health as well as the potential risk GBH residues pose to animal agriculture.
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Affiliation(s)
| | - Muslah Uddin Ahammad
- Department of Poultry Science, University of Georgia, Athens, GA 30602, United States
| | - Andrew Parks Benson
- Department of Poultry Science, University of Georgia, Athens, GA 30602, United States
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Singh S, Kumar V, Gill JPK, Datta S, Singh S, Dhaka V, Kapoor D, Wani AB, Dhanjal DS, Kumar M, Harikumar SL, Singh J. Herbicide Glyphosate: Toxicity and Microbial Degradation. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E7519. [PMID: 33076575 PMCID: PMC7602795 DOI: 10.3390/ijerph17207519] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 01/17/2023]
Abstract
Glyphosate is a non-specific organophosphate pesticide, which finds widespread application in shielding crops against the weeds. Its high solubility in hydrophilic solvents, especially water and high mobility allows the rapid leaching of the glyphosate into the soil leading to contamination of groundwater and accumulation into the plant tissues, therefore intricating the elimination of the herbicides. Despite the widespread application, only a few percentages of the total applied glyphosate serve the actual purpose, dispensing the rest in the environment, thus resulting in reduced crop yields, low quality agricultural products, deteriorating soil fertility, contributing to water pollution, and consequently threatening human and animal life. This review gives an insight into the toxicological effects of the herbicide glyphosate and current approaches to track and identify trace amounts of this agrochemical along with its biodegradability and possible remediating strategies. Efforts have also been made to summarize the biodegradation mechanisms and catabolic enzymes involved in glyphosate metabolism.
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Affiliation(s)
- Simranjeet Singh
- Department of Biotechnology, Lovely Professional University, Phagwara 144411, India; (S.S.); (V.D.); (D.S.D.)
- Punjab Biotechnology Incubator (PBTI), Phase-V, S.A.S. Nagar, Punjab 160059, India
- Regional Advance Water Testing Laboratory, Department of Water Supply and Sanitation, Phase-II, S.A.S. Nagar 160054, India;
| | - Vijay Kumar
- Regional Ayurveda Research Institute for Drug Development, Gwalior 474009, India;
| | | | - Shivika Datta
- Department of Zoology, Doaba College Jalandhar, Jalandhar 144001, India;
| | - Satyender Singh
- Regional Advance Water Testing Laboratory, Department of Water Supply and Sanitation, Phase-II, S.A.S. Nagar 160054, India;
| | - Vaishali Dhaka
- Department of Biotechnology, Lovely Professional University, Phagwara 144411, India; (S.S.); (V.D.); (D.S.D.)
| | - Dhriti Kapoor
- Department of Botany, Lovely Professional University, Phagwara 144411, India;
| | - Abdul Basit Wani
- Department of Chemistry, Lovely Professional University, Phagwara 144411, India;
| | - Daljeet Singh Dhanjal
- Department of Biotechnology, Lovely Professional University, Phagwara 144411, India; (S.S.); (V.D.); (D.S.D.)
| | - Manoj Kumar
- Department of Life Sciences, Central University Jharkhand, Brambe, Ranchi 835205, India; (M.K.); (S.L.H.)
| | - S. L. Harikumar
- Department of Life Sciences, Central University Jharkhand, Brambe, Ranchi 835205, India; (M.K.); (S.L.H.)
| | - Joginder Singh
- Department of Biotechnology, Lovely Professional University, Phagwara 144411, India; (S.S.); (V.D.); (D.S.D.)
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Tajnaiová L, Vurm R, Kholomyeva M, Kobera M, Kočí V. Determination of the Ecotoxicity of Herbicides Roundup ® Classic Pro and Garlon New in Aquatic and Terrestrial Environments. PLANTS (BASEL, SWITZERLAND) 2020; 9:E1203. [PMID: 32937994 PMCID: PMC7569783 DOI: 10.3390/plants9091203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/04/2020] [Accepted: 09/08/2020] [Indexed: 05/11/2023]
Abstract
Herbicides help increase agricultural yields significantly, but they may negatively impact the life of non-target organisms. Modifying the life cycle of primary producers can affect other organisms in the food chain, and consequently in the whole ecosystem. We investigated the effect of common herbicides Roundup® Classic Pro (active substance glyphosate) and Garlon New (triclopyr and fluroxypyr) on aquatic organisms duckweed Lemna minor and green algae Desmodesmus subspicatus, and on the enzymatic activity of soil. We also compared the effects of Roundup® Classic Pro to that of a metabolite of its active substance, aminomethylphosphonic acid (AMPA). The results of an algal growth test showed that AMPA has a 1.5× weaker inhibitory effect on the growth of D. subspicatus than the Roundup formula, and the strongest growth inhibition was caused by Garlon New (IC50Roundup = 267.3 µg/L, IC50Garlon = 21.0 µg/L, IC50AMPA = 117.8 mg/L). The results of the duckweed growth inhibition test revealed that Roundup and Garlon New caused 100% growth inhibition of L. minor even at significantly lower concentrations than the ready-to-use concentration. The total chlorophyll content in the fronds was lowest when Garlon New was used. The highest dehydrogenase activity was observed in soil treated with Garlon New, and the lowest in soil treated with Roundup® Classic Pro. The results of this study showed that all three tested substances were ecotoxic to the tested organisms.
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Affiliation(s)
- Lucia Tajnaiová
- Faculty of Environmental Technology, Department of Environmental Chemistry, UCT Prague, Technická 5, 166 28 Prague, Czech Republic; (R.V.); (M.K.); (M.K.); (V.K.)
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Elarabi NI, Abdelhadi AA, Ahmed RH, Saleh I, Arif IA, Osman G, Ahmed DS. Bacillus aryabhattai FACU: A promising bacterial strain capable of manipulate the glyphosate herbicide residues. Saudi J Biol Sci 2020; 27:2207-2214. [PMID: 32884402 PMCID: PMC7451736 DOI: 10.1016/j.sjbs.2020.06.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 06/24/2020] [Accepted: 06/30/2020] [Indexed: 12/02/2022] Open
Abstract
Glyphosate is a commonly used organophosphate herbicide that has an adverse impact on humans, mammals and soil microbial ecosystems. The redundant utilize of glyphosate to control weed growth cause the pollution of the soil environment by this chemical. The discharge of glyphosate in the agricultural drainage can also cause serious environmental damage and water pollution problems. Therefore, it is important to develop methods for enhancing glyphosate degradation in the soil through bioremediation. In this study, thirty bacterial isolates were selected from an agro-industrial zone located in Sadat City of Monufia Governorate, Egypt. The isolates were able to grow in LB medium supplemented with 7.2 mg/ml glyphosate. Ten isolates only had the ability to grow in a medium containing different concentrations of glyphosate (50, 100, 150, 200 and 250 mg/ml). The FACU3 bacterial isolate showed the highest CFU in the different concentrations of glyphosate. The FACU3 isolate was Gram-positive, spore-forming and rod-shape bacteria. Based on API 50 CHB/E medium kit, biochemical properties and 16S rRNA gene sequencing, the FACU3 isolate was identified as Bacillus aryabhattai. Different bioinformatics tools, including multiple sequence alignment (MSA), basic local alignment search tool (BLAST) and primer alignment, were used to design specific primers for goxB gene amplification and isolation. The goxB gene encodes FAD-dependent glyphosate oxidase enzyme that responsible for biodegradation process. The selected primers were successfully used to amplify the goxB gene from Bacillus aryabhattai FACU3. The results indicated that the Bacillus aryabhattai FACU3 can be utilized in glyphosate-contaminated environments for bioremediation. According to our knowledge, this is the first time to isolate of FAD-dependent glyphosate oxidase (goxB) gene from Bacillus aryabhattai.
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Affiliation(s)
- Nagwa I. Elarabi
- Cairo University, Faculty of Agriculture, Department of Genetics, Giza 12613, Egypt
| | | | - Rasha H. Ahmed
- Cairo University, Faculty of Agriculture, Department of Microbiology, Giza 12613, Egypt
| | - Ibrahim Saleh
- Prince Sultan Research Chair for Environment and Wildlife, Department of Botany & Microbiology, College of Sciences, King Saud University (KSU), Riyadh, Saudi Arabia
| | - Ibrahim A. Arif
- Prince Sultan Research Chair for Environment and Wildlife, Department of Botany & Microbiology, College of Sciences, King Saud University (KSU), Riyadh, Saudi Arabia
| | - Gamal Osman
- Agricultural Genetic Engineering Research Institute (AGERI), Agricultural Research Center (ARC), 12619 Giza, Egypt
- Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makka, Saudi Arabia
- Research Laboratories Center, Faculty of Applied Science, Umm Al-Qura University, Mecca, Saudi Arabia
| | - Dalia S. Ahmed
- Cairo University, Faculty of Agriculture, Department of Genetics, Giza 12613, Egypt
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Meftaul IM, Venkateswarlu K, Dharmarajan R, Annamalai P, Asaduzzaman M, Parven A, Megharaj M. Controversies over human health and ecological impacts of glyphosate: Is it to be banned in modern agriculture? ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114372. [PMID: 32203845 DOI: 10.1016/j.envpol.2020.114372] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 02/09/2020] [Accepted: 03/12/2020] [Indexed: 05/27/2023]
Abstract
Glyphosate, introduced by Monsanto Company under the commercial name Roundup in 1974, became the extensively used herbicide worldwide in the last few decades. Glyphosate has excellent properties of fast sorption in soil, biodegradation and less toxicity to nontarget organisms. However, glyphosate has been reported to increase the risk of cancer, endocrine-disruption, celiac disease, autism, effect on erythrocytes, leaky-gut syndrome, etc. The reclassification of glyphosate in 2015 as 'probably carcinogenic' under Group 2A by the International Agency for Research on Cancer has been broadly circulated by anti-chemical and environmental advocacy groups claiming for restricted use or ban of glyphosate. In contrast, some comprehensive epidemiological studies involving farmers with long-time exposure to glyphosate in USA and elsewhere coupled with available toxicological data showed no correlation with any kind of carcinogenic or genotoxic threat to humans. Moreover, several investigations confirmed that the surfactant, polyethoxylated tallow amine (POEA), contained in the formulations of glyphosate like Roundup, is responsible for the established adverse impacts on human and ecological health. Subsequent to the evolution of genetically modified glyphosate-resistant crops and the extensive use of glyphosate over the last 45 years, about 38 weed species developed resistance to this herbicide. Consequently, its use in the recent years has been either restricted or banned in 20 countries. This critical review on glyphosate provides an overview of its behaviour, fate, detrimental impacts on ecological and human health, and the development of resistance in weeds and pathogens. Thus, the ultimate objective is to help the authorities and agencies concerned in resolving the existing controversies and in providing the necessary regulations for safer use of the herbicide. In our opinion, glyphosate can be judiciously used in agriculture with the inclusion of safer surfactants in commercial formulations sine POEA, which is toxic by itself is likely to increase the toxicity of glyphosate.
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Affiliation(s)
- Islam Md Meftaul
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW 2308, Australia; Department of Agricultural Chemistry, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Kadiyala Venkateswarlu
- Formerly Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu 515003, India
| | - Rajarathnam Dharmarajan
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Prasath Annamalai
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Md Asaduzzaman
- NSW Department of Primary Industries, Pine Gully Road, Wagga Wagga, NSW 2650, Australia
| | - Aney Parven
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW 2308, Australia; Department of Agricultural Chemistry, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle, Callaghan, NSW 2308, Australia.
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Gaines TA, Duke SO, Morran S, Rigon CAG, Tranel PJ, Küpper A, Dayan FE. Mechanisms of evolved herbicide resistance. J Biol Chem 2020; 295:10307-10330. [PMID: 32430396 PMCID: PMC7383398 DOI: 10.1074/jbc.rev120.013572] [Citation(s) in RCA: 206] [Impact Index Per Article: 51.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/18/2020] [Indexed: 12/13/2022] Open
Abstract
The widely successful use of synthetic herbicides over the past 70 years has imposed strong and widespread selection pressure, leading to the evolution of herbicide resistance in hundreds of weed species. Both target-site resistance (TSR) and nontarget-site resistance (NTSR) mechanisms have evolved to most herbicide classes. TSR often involves mutations in genes encoding the protein targets of herbicides, affecting the binding of the herbicide either at or near catalytic domains or in regions affecting access to them. Most of these mutations are nonsynonymous SNPs, but polymorphisms in more than one codon or entire codon deletions have also evolved. Some herbicides bind multiple proteins, making the evolution of TSR mechanisms more difficult. Increased amounts of protein target, by increased gene expression or by gene duplication, are an important, albeit less common, TSR mechanism. NTSR mechanisms include reduced absorption or translocation and increased sequestration or metabolic degradation. The mechanisms that can contribute to NTSR are complex and often involve genes that are members of large gene families. For example, enzymes involved in herbicide metabolism-based resistances include cytochromes P450, GSH S-transferases, glucosyl and other transferases, aryl acylamidase, and others. Both TSR and NTSR mechanisms can combine at the individual level to produce higher resistance levels. The vast array of herbicide-resistance mechanisms for generalist (NTSR) and specialist (TSR and some NTSR) adaptations that have evolved over a few decades illustrate the evolutionary resilience of weed populations to extreme selection pressures. These evolutionary processes drive herbicide and herbicide-resistant crop development and resistance management strategies.
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Affiliation(s)
- Todd A Gaines
- Agricultural Biology Department, Colorado State University, Fort Collins, Colorado, USA
| | - Stephen O Duke
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Oxford, Mississippi, USA
| | - Sarah Morran
- Agricultural Biology Department, Colorado State University, Fort Collins, Colorado, USA
| | - Carlos A G Rigon
- Agricultural Biology Department, Colorado State University, Fort Collins, Colorado, USA
| | - Patrick J Tranel
- Department of Crop Sciences, University of Illinois, Urbana, Illinois, USA
| | - Anita Küpper
- Bayer AG, CropScience Division, Frankfurt am Main, Germany
| | - Franck E Dayan
- Agricultural Biology Department, Colorado State University, Fort Collins, Colorado, USA
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Kaczynski P, Lozowicka B, Wolejko E, Iwaniuk P, Konecki R, Dragowski W, Lozowicki J, Amanbek N, Rusilowska J, Pietraszko A. Complex study of glyphosate and metabolites influence on enzymatic activity and microorganisms association in soil enriched with Pseudomonas fluorescens and sewage sludge. JOURNAL OF HAZARDOUS MATERIALS 2020; 393:122443. [PMID: 32163800 DOI: 10.1016/j.jhazmat.2020.122443] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/26/2020] [Accepted: 02/29/2020] [Indexed: 05/18/2023]
Abstract
This is the first large scale study of fate of the glyphosate (GLP) and its metabolites, (AMPA, N-acetyl glyphosate, N-acetyl AMPA, sarcosine and glycine) monitored by LC/MS/MS. The laboratory trials of behavior of GLP in two types of agricultural soil were performed. Soil (S), soil enriched with sewage sludge (S + SL), soil with Pseudomonas fluorescens (S + P) and soil enriched with sewage sludge and P. fluorescens (S + SL + P) was treated with Roundup 360 SL under controlled conditions. The presence of metabolites was depended on the soil type and enrichment with sludge or bacteria. The GLP and its soil metabolites caused increase of microorganisms association in comparison to control. We assumed that P. fluorescens and sewage sludge influence on time of GLP dissipation. Moreover, GLP degradation in presence of P. fluorescens and sewage sludge is carried out in different metabolic pathways compared to control (S + GLP). Furthermore, presence of particular GLP metabolites is related to different metabolic pathways and is connected with P. fluorescens and sewage sludge occurrence in soil. Additionally, P. fluorescens and sewage sludge stimulate enzymatic activity of soils.
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Affiliation(s)
- Piotr Kaczynski
- Institute of Plant Protection-National Research Institute, Chelmonskiego 22 Street, 15-195 Bialystok, Poland.
| | - Bozena Lozowicka
- Institute of Plant Protection-National Research Institute, Chelmonskiego 22 Street, 15-195 Bialystok, Poland; Kazakh National Agrarian University, Abai Avenue 8, Almaty, 050010, Kazakhstan
| | - Elzbieta Wolejko
- Bialystok University of Technology, Department of Chemistry, Biology and Biotechnology, Wiejska 45A Street, 15-351, Bialystok, Poland.
| | - Piotr Iwaniuk
- Institute of Plant Protection-National Research Institute, Chelmonskiego 22 Street, 15-195 Bialystok, Poland; University of Bialystok, Department of Microbiology and Biotechnology, Faculty of Biology, Ciolkowskiego 1J Street, 15-245, Bialystok, Poland
| | - Rafal Konecki
- Institute of Plant Protection-National Research Institute, Chelmonskiego 22 Street, 15-195 Bialystok, Poland
| | - Wojciech Dragowski
- Institute of Plant Protection-National Research Institute, Chelmonskiego 22 Street, 15-195 Bialystok, Poland
| | | | - Nurlan Amanbek
- Kazakh National Agrarian University, Abai Avenue 8, Almaty, 050010, Kazakhstan
| | - Julia Rusilowska
- Institute of Plant Protection-National Research Institute, Chelmonskiego 22 Street, 15-195 Bialystok, Poland
| | - Aleksandra Pietraszko
- Institute of Plant Protection-National Research Institute, Chelmonskiego 22 Street, 15-195 Bialystok, Poland
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Finley JW, Duke SO. Agnes Rimando, a Pioneer in the Fate of Glyphosate and Its Primary Metabolite in Plants. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:5623-5630. [PMID: 32330026 DOI: 10.1021/acs.jafc.0c00811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Glyphosate is the most used herbicide on the planet because of its excellent efficacy on almost all weed species and due to the large-scale adoption of transgenic, glyphosate-resistant (GR) crops. Agnes Rimando became an expert in glyphosate analysis almost 20 years ago to support research on GR crop safety and on mechanisms of evolved glyphosate resistance by weeds. Her work was the first to show that the amount of glyphosate and its primary metabolite aminomethylphosphonic acid (AMPA) that accumulates in GR soybean seed from plants treated with approved glyphosate doses can approach their legal limits. However, she later found that only trace amounts of these compounds accumulate in the seed of GR maize treated with recommended glyphosate doses. She showed that GR canola, the only transgenic crop with a transgene encoding an enzyme for degradation of glyphosate, metabolizes glyphosate to AMPA very rapidly. Her work was instrumental in providing support for the view that "yellow flash" symptoms sometimes observed in field-grown GR soybeans are due to accumulation of enough AMPA to cause mild phytotoxicity. She did the chemical analyses in the only paper to survey the capacity of an array of plant species to metabolize glyphosate to AMPA. She found a wide range in this capacity, with grasses with little or no metabolism of glyphosate to AMPA and with legumes readily metabolizing glyphosate. Lastly, she found no evidence of enhanced degradation of glyphosate to be a mechanism of evolved resistance to glyphosate by two weed species but that it might be involved in natural tolerance to glyphosate of some weeds.
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Affiliation(s)
- John W Finley
- Department of Nutrition and Food Sciences Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Stephen O Duke
- National Center for Natural Products Research School of Pharmacy University of Mississippi University, Mississippi 38677-8048, United States
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New Case of False-Star-Grass (Chloris distichophylla) Population Evolving Glyphosate Resistance. AGRONOMY-BASEL 2020. [DOI: 10.3390/agronomy10030377] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Chloris distichophylla, suspected of glyphosate resistance (GR), was collected from areas of soybean cultivation in Rio Grande do Sul, Brazil. A comparison was made with a susceptible population (GS) to evaluate the resistance level, mechanisms involved, and control alternatives. Glyphosate doses required to reduce the dry weight (GR50) or cause a mortality rate of 50% (LD50) were around 5.1–3 times greater in the GR population than in the GS population. The shikimic acid accumulation was around 6.2-fold greater in GS plants than in GR plants. No metabolized glyphosate was found in either GR or GS plants. Both populations did not differ in the enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) basal activity or in vitro inhibition of EPSPS activity by glyphosate (I50). The maximum glyphosate absorption was observed at 96 hours after treatment (HAT), which was twofold higher in the GS plants than in the GR plants. This confirms the first case of glyphosate resistance in C. distichophylla. In addition, at 96 HAT, the GS plants translocated more 14C-glyphosate than the GR ones. The best options for the chemical control of both C. distichophylla populations were clethodim, quizalofop, paraquat, glufosinate, tembotrione, diuron, and atrazine. The first case of glyphosate resistance in C. distichophylla was due to impaired uptake and translocation. Chemical control using multiple herbicides with different modes of action (MOA) could be a tool used for integrated weed management (IWM) programs.
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Wilson CE, Takano HK, Van Horn CR, Yerka MK, Westra P, Stoltenberg DE. Physiological and molecular analysis of glyphosate resistance in non-rapid response Ambrosia trifida from Wisconsin. PEST MANAGEMENT SCIENCE 2020; 76:150-160. [PMID: 31087487 DOI: 10.1002/ps.5485] [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: 11/13/2018] [Revised: 05/09/2019] [Accepted: 05/09/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND We previously identified a glyphosate-resistant A. trifida phenotype from Wisconsin USA that showed a non-rapid response to glyphosate. The mechanism of glyphosate resistance in this phenotype has yet to be elucidated. We conducted experiments to investigate non-target-site resistance and target-site resistance mechanisms. The roles of glyphosate absorption, translocation, and metabolism in resistance of this phenotype have not been reported previously, nor have EPSPS protein abundance or mutations to the full-length sequence of EPSPS. RESULTS Whole-plant dose-response results confirmed a 6.5-level of glyphosate resistance for the resistant (R) phenotype compared to a susceptible (S) phenotype. Absorption and translocation of 14 C-glyphosate were similar between R and S phenotypes over 72 h. Glyphosate and AMPA concentrations in leaf tissue did not differ between R and S phenotypes over 96 h. In vivo shikimate leaf disc assays confirmed that glyphosate EC50 values were 4.6- to 5.4-fold greater for the R than S phenotype. Shikimate accumulation was similar between phenotypes at high glyphosate concentrations (>1000 μM), suggesting that glyphosate entered chloroplasts and inhibited EPSPS. This finding was supported by results showing that EPSPS copy number and EPSPS protein abundance did not differ between R and S phenotypes, nor did EPSPS sequence at Gly101, Thr102, and Pro106 positions. Comparison of full-length EPSPS sequences found five nonsynonymous polymorphisms that differed between R and S phenotypes. However, their locations were distant from the glyphosate target site and, therefore, not likely to affect enzyme-glyphosate interaction. CONCLUSION The results suggest that a novel mechanism confers glyphosate resistance in this A. trifida phenotype. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Courtney E Wilson
- Department of Agronomy, University of Wisconsin-Madison, Madison, WI, USA
| | - Hudson K Takano
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| | - Christopher R Van Horn
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| | - Melinda K Yerka
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| | - Philip Westra
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
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Fonseca ECM, da Costa KS, Lameira J, Alves CN, Lima AH. Investigation of the target-site resistance of EPSP synthase mutants P106T and T102I/P106S against glyphosate. RSC Adv 2020; 10:44352-44360. [PMID: 35517162 PMCID: PMC9058485 DOI: 10.1039/d0ra09061a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 12/04/2020] [Indexed: 01/09/2023] Open
Abstract
The shikimate pathway enzyme 5-enolpyruvyl shikimate-3-phosphate synthase (EPSPS) catalyzes the reaction involved in the production of amino acids essential for plant growth and survival. Thus, EPSPS is the main target of various herbicides, including glyphosate, a broad-spectrum herbicide that acts as a competitive inhibitor of phosphoenolpyruvate (PEP), which is the natural substrate of EPSPS. However, punctual mutations in the EPSPS gene have led to glyphosate resistance in some plants. Here, we investigated the mechanism of EPSPS resistance to glyphosate in mutants of two weed species, Conyza sumatrensis (mutant, P106T) and Eleusine indica (mutant, T102I/P106S), both of which have an economic impact on industrial crops. Molecular dynamics (MD) simulations and binding free energy calculations revealed the influence of the mutations on the affinity of glyphosate in the PEP-binding site. The amino acid residues of the EPSPS protein in both species involved in glyphosate resistance were elucidated as well as other residues that could be useful for protein engineering. In addition, during MD simulations, we identified conformational changes in glyphosate when complexed with resistant EPSPS, related to loss of herbicide activity and binding affinity. Our computational findings are consistent with previous experimental results and clarify the inhibitory activity of glyphosate as well as the structural target-site resistance of EPSPS against glyphosate. Single or double EPSP synthase mutations lead glyphosate to undergo conformational changes that limit its inhibitory action.![]()
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Affiliation(s)
- Emily C. M. Fonseca
- Laboratório de Planejamento e Desenvolvimento de Fármacos
- Instituto de Ciências Exatas e Naturais
- Universidade Federal do Pará
- Belém
- Brazil
| | - Kauê S. da Costa
- Instituto de Biodiversidade
- Universidade Federal do Oeste do Pará
- Santarém
- Brazil
| | - Jerônimo Lameira
- Laboratório de Planejamento e Desenvolvimento de Fármacos
- Instituto de Ciências Exatas e Naturais
- Universidade Federal do Pará
- Belém
- Brazil
| | - Cláudio Nahum Alves
- Laboratório de Planejamento e Desenvolvimento de Fármacos
- Instituto de Ciências Exatas e Naturais
- Universidade Federal do Pará
- Belém
- Brazil
| | - Anderson H. Lima
- Laboratório de Planejamento e Desenvolvimento de Fármacos
- Instituto de Ciências Exatas e Naturais
- Universidade Federal do Pará
- Belém
- Brazil
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Tauhata SBF, Araújo GBD, Alves SDFDO, Martins DNV, Lopes LS, Casaletti L. The glyphosate controversy: an update. ARQUIVOS DO INSTITUTO BIOLÓGICO 2020. [DOI: 10.1590/1808-1657001002018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT The demand for food in the world grows year after year due in part to population growth, but also to the improvement of emerging markets. Brazil is one of the largest food producers in the world. In 2017, its cereal, legume and oilseed crops totaled 238.6 million tons, 29.2% more than the year before. Much of the great increase in productivity is due to the incorporation of transgenic seeds, especially cotton, maize and soybean, which possess genes that will increase plant’s adaptability to harsh soil and water conditions and, resistance to pests, but also tolerance to herbicides. Virtually, all transgenic soybeans planted in Brazil are resistant to glyphosate, the herbicide initially launched on the market by Monsanto in the 1970s under the trade name Roundup. Due to the existence of several transgenic crops tolerant to glyphosate, such as soy, wheat, corn and canola, this product is the most commercialized herbicide in the world. The use of glyphosate allows the sowing of transgenic crops immediately after application, making the planting and maintenance processes very practical. Soybeans, such as other transgenics, have biological safety already well defined, but the use of glyphosate is still an extremely controversial subject. This review presents some historical aspects of the binomial Roundup Ready soybean/glyphosate and discusses the most recent controversies about the use of glyphosate in Brazil and worldwide.
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Affiliation(s)
| | | | | | | | | | - Luciana Casaletti
- Centro Universitário de Goiás, Brazil; Centro Universitário de Goiás, Brazil
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Stosiek N, Terebieniec A, Ząbek A, Młynarz P, Cieśliński H, Klimek-Ochab M. N-phosphonomethylglycine utilization by the psychrotolerant yeast Solicoccozyma terricola M 3.1.4. Bioorg Chem 2019; 93:102866. [PMID: 30902434 DOI: 10.1016/j.bioorg.2019.03.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 03/14/2019] [Accepted: 03/14/2019] [Indexed: 10/27/2022]
Abstract
Solicoccozyma terricola M 3.1.4., the yeast strain isolated from soil sample from blueberry cultivation in Miedzyrzec Podlaski in Poland, is capable to split of phosphorus to nitrogen and nitrogen to carbon bonds in N-phosphonomethylglycine (PMG, glyphosate). The biodegradation process proceeds in the phosphate-independent manner. It is the first example of a psychrotolerant yeast strain able to degrade PMG via CN bond cleavage accompanied by AMPA formation and not like in most microorganisms via CP bond disruption followed by the sarcosine pathway. Glyphosate oxidoreductase (GOX) type activity was detected in cell-free extracts prepared from S. terricola M 3.1.4. pregrown on 4 mM PMG as a sole phosphorus and nitrogen source in cultivation medium.
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Affiliation(s)
- Natalia Stosiek
- Department of Bioorganic Chemistry, Wroclaw University of Science and Technology, Wroclaw, Poland.
| | - Agata Terebieniec
- Department of Molecular Biotechnology and Microbiology, Gdansk University of Technology, Gdansk, Poland
| | - Adam Ząbek
- Department of Bioorganic Chemistry, Wroclaw University of Science and Technology, Wroclaw, Poland; PORT Polish Center for Technology Development, Wroclaw, Poland
| | - Piotr Młynarz
- Department of Bioorganic Chemistry, Wroclaw University of Science and Technology, Wroclaw, Poland
| | - Hubert Cieśliński
- Department of Molecular Biotechnology and Microbiology, Gdansk University of Technology, Gdansk, Poland
| | - Magdalena Klimek-Ochab
- Department of Bioorganic Chemistry, Wroclaw University of Science and Technology, Wroclaw, Poland
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Mora DA, Cheimona N, Palma-Bautista C, Rojano-Delgado AM, Osuna-Ruiz MD, Alcántara de la Cruz R, De Prado R. Physiological, biochemical and molecular bases of resistance to tribenuron-methyl and glyphosate in Conyza canadensis from olive groves in southern Spain. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 144:14-21. [PMID: 31550609 DOI: 10.1016/j.plaphy.2019.09.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 09/15/2019] [Accepted: 09/16/2019] [Indexed: 06/10/2023]
Abstract
Multiple resistance to acetolactate synthase (ALS, EC 2.2.1.6) and 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS, EC 2.5.1.19) inhibitor herbicides was studied in two populations of Conyza canadensis (RTG and STG) harvested in southern Spain. Dose-response and enzymatic activity studies for the ALS-inhibiting herbicides showed only cross-resistance to sulfonylureas group but not to the other ALS chemical groups in the RTG population. Regarding glyphosate, the dose-response studies showed that the RTG population was 11.8 times more resistant than the STG population, while the inhibition of EPSPS enzyme (I50) was similar for both populations. Altered/reduced absorption and translocation were the main resistance mechanisms for glyphosate but not for tribenuron-methyl. The metabolic studies to find differences in the amounts of metabolites between the two populations were carried out using thin layer chromatography (for tribenuron-methyl) and capillary electrophoresis (for glyphosate). Metabolites were significantly differed among the two populations for tribenuron-methyl but not for glyphosate. The sequencing of the target-site ALS gene from RTG plants revealed a single point mutation, Pro-197-Ala, that causes resistance to sulfonylurea herbicide in C. canadensis.
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Affiliation(s)
- David A Mora
- Department of Agricultural Chemistry and Soil Science, University of Cordoba, 14071, Cordoba, Spain
| | - Nikolina Cheimona
- Agricultural University of Athens, Faculty of Crop Science, 75, Iera Odos str., GR11855, Athens, Greece
| | | | - Antonia M Rojano-Delgado
- Department of Agricultural Chemistry and Soil Science, University of Cordoba, 14071, Cordoba, Spain.
| | - María Dolores Osuna-Ruiz
- Center for Scientific and Technological Research of Extremadura (CICYTEX), 06187, Badajoz, Spain
| | | | - Rafael De Prado
- Department of Agricultural Chemistry and Soil Science, University of Cordoba, 14071, Cordoba, Spain
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Tian-Tian L, Ping H, Jia-Xing L, Zhi-Xin K, Ye-Hui T. Utilization of different dissolved organic phosphorus sources by Symbiodinium voratum in vitro. FEMS Microbiol Ecol 2019; 95:fiz150. [PMID: 31580458 DOI: 10.1093/femsec/fiz150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Accepted: 10/02/2019] [Indexed: 11/14/2022] Open
Abstract
This study examines the physiological responses of the Symbiodiniumvoratum (clade E) to two types of phosphates having different chemical bonds-phosphoesters (C-O-P bonds) and phosphonates (C-P bonds) to explore Symbiodinium cell growth and the molecular perspective of the P utilization process. Alkaline phosphatase (AP), PhnX, PhoA and PhoX expression was profiled for different P conditions using the RT-qPCR method. In a sterile system, Symbiodinium could decompose phosphoesters, such as ATP and glucose 6-phosphate (G-6-P), into dissolved inorganic P (DIP) to supplement inorganic phosphorus but could not directly use phosphoesters for growth. The growth rate and photosynthetic efficiency of zooxanthellae in phosphoester-containing media did not significantly differ from those in the DIP group but were significantly inhibited in medium containing phosphonates such as N-(phosphonomethyl)glycine (glyphosate) and 2-aminoethylphosphonic acid (2-AEP), as well as in DIP-poor medium. The phosphonate group DIP concentration did not change remarkably, indicating that phosphonates can neither be directly used by zooxanthellae nor decomposed into DIP. Our RT-qPCR results support our views that the phosphoesters (C-O-P) had been hydrolyzed outside the cell before being absorbed into the Symbiodinium cell, and implies that PhnX, PhoA and PhoX are perhaps responsible for transporting DIP from medium into cells and for storage of DIP.
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Affiliation(s)
- Liu Tian-Tian
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
- Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, China
- Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences (ISEE, CAS)
| | - Huang Ping
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Liu Jia-Xing
- Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, China
- Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences (ISEE, CAS)
| | - Ke Zhi-Xin
- Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, China
- Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences (ISEE, CAS)
| | - Tan Ye-Hui
- Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, China
- Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences (ISEE, CAS)
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46
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Mora AD, Rosario J, Rojano-Delgado AM, Palma-Bautista C, Torra J, Alcántara-de la Cruz R, De Prado R. Multiple Resistance to Synthetic Auxin Herbicides and Glyphosate in Parthenium hysterophorus Occurring in Citrus Orchards. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:10010-10017. [PMID: 31414816 DOI: 10.1021/acs.jafc.9b03988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Dominican farmers have started to apply synthetic auxin herbicides (SAHs) as the main alternative to mitigate the impacts of the occurrence of glyphosate-resistant (GR) Parthenium hysterophorus populations in citrus orchards. A GR P. hysterophorus population survived field labeled rates of glyphosate, 2,4-dichlorophenoxyacetic acid (2,4-D), dicamba, and picloram, which showed poor control (<50%). In in vivo assays, resistance levels were high for glyphosate and moderate for picloram, dicamba, and 2,4-D. Sequencing the 5-enolpyruvylshikimate-3-phosphate synthase gene revealed the double Thr-102-Ile and Pro-106-Ser amino acid substitution, conferring resistance to glyphosate. Additionally, reduced absorption and impaired translocation contributed to this resistance. Regarding SAH, impaired 2,4-D transport and enhanced metabolism were confirmed in resistant plants. The application of malathion improved the efficacy of SAHs (control >50%), showing that metabolism of these herbicides was mediated by cytochrome P450 enzymes. This study reports, for the first time, multiple resistance to SAHs and glyphosate in P. hysterophorus.
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Affiliation(s)
- Andrés D Mora
- Department of Agricultural Chemistry and Edaphology , University of Cordoba , 14071 Cordoba , Spain
| | - Jesús Rosario
- Universidad Católica Tecnológica del Cibao-UCATECI , La Vega 41000 , República Dominicana
| | - Antonia M Rojano-Delgado
- Department of Agricultural Chemistry and Edaphology , University of Cordoba , 14071 Cordoba , Spain
| | | | - Joel Torra
- Department d'Hortofructicultura, Botánica i Jardineria, Agrotecnio , Universitat de Lleida , 25198 Lleida , Spain
| | | | - Rafael De Prado
- Department of Agricultural Chemistry and Edaphology , University of Cordoba , 14071 Cordoba , Spain
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Belbin FE, Hall GJ, Jackson AB, Schanschieff FE, Archibald G, Formstone C, Dodd AN. Plant circadian rhythms regulate the effectiveness of a glyphosate-based herbicide. Nat Commun 2019; 10:3704. [PMID: 31420556 PMCID: PMC6697731 DOI: 10.1038/s41467-019-11709-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 07/31/2019] [Indexed: 11/22/2022] Open
Abstract
Herbicides increase crop yields by allowing weed control and harvest management. Glyphosate is the most widely-used herbicide active ingredient, with $11 billion spent annually on glyphosate-containing products applied to >350 million hectares worldwide, using about 8.6 billion kg of glyphosate. The herbicidal effectiveness of glyphosate can depend upon the time of day of spraying. Here, we show that the plant circadian clock regulates the effectiveness of glyphosate. We identify a daily and circadian rhythm in the inhibition of plant development by glyphosate, due to interaction between glyphosate activity, the circadian oscillator and potentially auxin signalling. We identify that the circadian clock controls the timing and extent of glyphosate-induced plant cell death. Furthermore, the clock controls a rhythm in the minimum effective dose of glyphosate. We propose the concept of agricultural chronotherapy, similar in principle to chronotherapy in medical practice. Our findings provide a platform to refine agrochemical use and development, conferring future economic and environmental benefits.
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Affiliation(s)
- Fiona E Belbin
- School of Biological Sciences, University of Bristol, Bristol, BS8 1TQ, UK
| | - Gavin J Hall
- Syngenta, Jealott's Hill International Research Centre, Warfield, Bracknell, RG42 6EY, UK
| | - Amelia B Jackson
- School of Biological Sciences, University of Bristol, Bristol, BS8 1TQ, UK
| | | | - George Archibald
- Syngenta, Jealott's Hill International Research Centre, Warfield, Bracknell, RG42 6EY, UK
| | - Carl Formstone
- Syngenta, Jealott's Hill International Research Centre, Warfield, Bracknell, RG42 6EY, UK
| | - Antony N Dodd
- School of Biological Sciences, University of Bristol, Bristol, BS8 1TQ, UK.
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Tarafdar A, Vishwakarma H, Gothandapani S, Bhati M, Biswas K, Prakash A, Chaturvedi U, Solanke AU, Padaria JC. A quick, easy and cost-effective in planta method to develop direct transformants in wheat. 3 Biotech 2019; 9:180. [PMID: 31058046 PMCID: PMC6470228 DOI: 10.1007/s13205-019-1708-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 04/08/2019] [Indexed: 10/27/2022] Open
Abstract
Agrobacterium mediated in planta method was used to transform Indian elite wheat genotype HD2894 with herbicide-tolerant CP4-EPSPS (5-enolpyruvylshikimate-3-phosphate synthase) gene. The apical meristems of germinated seeds were targeted for introgression of transgene. The obtained T1 plants were screened by spraying 1% glyphosate and only positive transformants survived. The presence of transgene was also confirmed by PCR and Southern hybridization. Using this method, 3.07% transformation rate was observed. To identify transgenic lines carrying stably integrated CP4-EPSPS gene, the transgenic populations were screened in T3 generation using 1% glyphosate and lines with 100% survival were considered as homozygous. No significant morpho-physiological variations were observed within the transgenic lines as compared to non-transgenic plants. The present study resulted in herbicide-tolerant transgenic wheat and provides a valuable tool for development of wheat genetic transformation.
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Affiliation(s)
- Avijit Tarafdar
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, 110012 India
| | - Harinder Vishwakarma
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, 110012 India
| | - S. Gothandapani
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, 110012 India
| | - Meenal Bhati
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, 110012 India
| | - Koushik Biswas
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, 110012 India
| | - Arul Prakash
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, 110012 India
| | - Uttara Chaturvedi
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, 110012 India
| | - Amolkumar U. Solanke
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, 110012 India
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49
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Palma-Bautista C, Gherekhloo J, Domínguez-Martínez PA, Domínguez-Valenzuela JA, Cruz-Hipolito HE, Alcántara-de la Cruz R, Rojano-Delgado AM, De Prado R. Characterization of three glyphosate resistant Parthenium hysterophorus populations collected in citrus groves from Mexico. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 155:1-7. [PMID: 30857618 DOI: 10.1016/j.pestbp.2018.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 11/01/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023]
Abstract
Continuous use of glyphosate in citrus groves in the Gulf of Mexico region has selected for resistant Parthenium hysterophorus L. populations. In this study, the target-site and non-target-site resistance mechanisms were characterized in three putative glyphosate-resistant (GR) P. hysterophorus populations, collected in citrus groves from Acateno, Puebla (GR1 and GR2) and Martínez de la Torre, Veracruz (GR3), and compared with a susceptible population (GS). Based on plant mortality, the GR populations were 9.2-17.3 times more resistant to glyphosate than the GS population. The low shikimate accumulation in the GR population confirmed this resistance. Based on plant mortality and shikimate accumulation, the GR3 population showed intermediate resistance to glyphosate. The GR populations absorbed 15-28% less 14C-glyphosate than the GS population (78.7% absorbed from the applied) and retained 48.7-70.7% of 14C-glyphosate in the treated leaf, while the GS population translocated ~68% of absorbed herbicide to shoots and roots. The GR3 population showed the lowest translocation and absorption rates, but was found to be susceptible at the target site level. The 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) gene sequence of the GR1 and GR2 populations showed the Pro106-Ser mutation, conferring 19- and 25-times more resistance in comparison to the GS population, respectively. Reduced absorption and impaired translocation conferred glyphosate resistance on the GR3 population, and contributed partially to the resistance of the GR1 and GR2 populations. Additionally, the Pro-106-Ser mutation increased the glyphosate resistance of the last two P. hysterophorus populations.
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Affiliation(s)
| | - Javid Gherekhloo
- Department of Agronomy, Gorgan University of Agricultural Sciences and Natural Resources, 49189-43464 Gorgan, Iran.
| | - Pablo Alfredo Domínguez-Martínez
- National Institute of Forestry, Agriculture and Livestock Research (INIFAP)-Valle del Guadiana Experimental Field, 34170 Durango, Mexico
| | | | | | | | - Antonia M Rojano-Delgado
- Department of Agricultural Chemistry and Edaphology, University of Cordoba, 14071 Cordoba, Spain
| | - Rafael De Prado
- Department of Agricultural Chemistry and Edaphology, University of Cordoba, 14071 Cordoba, Spain
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50
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Barker AL, Dayan FE. Fate of Glyphosate during Production and Processing of Glyphosate-Resistant Sugar Beet ( Beta vulgaris). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:2061-2065. [PMID: 30694061 DOI: 10.1021/acs.jafc.8b05672] [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] [Indexed: 06/09/2023]
Abstract
Glyphosate is a widely used herbicide in commercial crop production for both conventional and herbicide-resistant crops. Herbicide-resistant crops, like glyphosate-resistant sugar beet, are often exposed to multiple applications of glyphosate during the growing season. The fate of this herbicide in resistant crops has not been publicly documented. We investigated the fate of glyphosate and main metabolite aminomethylphosphonic acid in glyphosate-resistant sugar beet grown in northern Colorado. Glyphosate residues were measured via directed ultra-high-performance liquid chromatography tandem mass spectrometry analysis of sugar beet shoots and roots throughout the growing season, from samples collected at various steps during sugar beet processing, and from flow-through samples of greenhouse-grown beets. Sugar beet rapidly absorbed glyphosate after foliar application, and subsequently translocated the herbicide to its roots, with between 2 and 3 μg/g fresh weight measured in both tissue types within 1 week of application. However, only trace amounts of glyphosate remained in either the shoots or the roots 2 weeks after application. Analysis of irrigation flow-through in pot assays confirmed that the herbicide readily exuded out of the roots. Processing of the beets removed glyphosate and herbicide levels were below the limit of detection in the crystalline sugar final product.
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Affiliation(s)
- Abigail L Barker
- Department of Bioagricultural Sciences and Pest Management , Colorado State University , 1177 Campus Delivery , Fort Collins , Colorado 80523 , United States
| | - Franck E Dayan
- Department of Bioagricultural Sciences and Pest Management , Colorado State University , 1177 Campus Delivery , Fort Collins , Colorado 80523 , United States
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