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Wang H, Fang J, Li X, Sun P, Gao H, Ren Y, Liu Y, Feng Z, Dong L. Epigenetic Regulation of CYP72A385-Mediated Metabolic Resistance to Novel Auxin Herbicide Florpyrauxifen-benzyl in Echinochloa crus-galli (L.) P. Beauv. J Agric Food Chem 2024. [PMID: 38600742 DOI: 10.1021/acs.jafc.4c00804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
Weed's metabolic resistance to herbicides has undermined the sustainability of herbicides and global food security. Notably, we identified an Echinochloa crus-galli (L.) P. Beauv population (R) that evolved resistance to the never-used florpyrauxifen-benzyl, in which florpyrauxifen-benzyl was metabolized faster than the susceptible E. crus-galli population (S). RNA-seq identified potential metabolism-related genes, EcCYP72A385 and EcCYP85A1, whose expression in yeast exhibited the capacity to degrade florpyrauxifen-benzyl. Region-2 in the EcCYP72A385 promoter showed significant demethylation after florpyrauxifen-benzyl treatment in the R population. DNA methyltransferase inhibitors induce EcCYP72A385 overexpression in the S population and endow it with tolerance to florpyrauxifen-benzyl. Moreover, methyltransferase-like 7A (EcMETTL7A) was overexpressed in the S population and specifically bound to the EcCYP72A385 promoter. Transgenic EcCYP72A385 in Arabidopsis and Oryza sativa L. exhibited resistance to florpyrauxifen-benzyl, whereas EcMETTL7A transgenic plants were sensitive. Overall, EcCYP72A385 is the principal functional gene for conferring resistance to florpyrauxifen-benzyl and is regulated by EcMETTL7A in E. crus-galli.
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Affiliation(s)
- Hao Wang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing 210095, China
| | - Jiapeng Fang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Xiaoxu Li
- College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Penglei Sun
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Haitao Gao
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing 210095, China
| | - Yanrong Ren
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing 210095, China
| | - Ying Liu
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhike Feng
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing 210095, China
| | - Liyao Dong
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
- Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture and Rural Affairs, Nanjing Agricultural University, Nanjing 210095, China
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White AM, Van Frost SR, Jauquet JM, Magness AM, McMahon KD, Remucal CK. Quantifying the Role of Simultaneous Transformation Pathways in the Fate of the Novel Aquatic Herbicide Florpyrauxifen-Benzyl. Environ Sci Technol 2023; 57:12421-12430. [PMID: 37552855 DOI: 10.1021/acs.est.3c03343] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Predicting the fate of organic compounds in the environment is challenging due to the inability of laboratory studies to replicate field conditions. We used the intentionally applied aquatic herbicide florpyrauxifen-benzyl (FPB) as a model compound to investigate the contribution of multiple transformation pathways to organic compound fate in lakes. FPB persisted in five Wisconsin lakes for 5-7 days with an in-lake half-life of <2 days. FPB formed four transformation products, with the bioactive product florpyrauxifen persisting up to 30 days post-treatment. Parallel laboratory experiments showed that FPB degrades to florpyrauxifen via base-promoted hydrolysis. Hydroxy-FPB and hydroxy-florpyrauxifen were identified as biodegradation products, while dechloro-FPB was identified as a photoproduct. Material balance calculations using both laboratory rates and field product concentrations demonstrated that hydrolysis (∼47% of loss), biodegradation (∼20%), sorption (∼13%), and photodegradation (∼4%) occurred on similar timescales. Furthermore, the combined results demonstrated that abiotic and plant-catalyzed hydrolysis of FPB to florpyrauxifen, followed by biodegradation of florpyrauxifen to hydroxy-florpyrauxifen, was the dominant transformation pathway in lakes. This study demonstrates how combined field and laboratory studies can be used to elucidate the role of simultaneous and interacting pathways in the fate of organic compounds in aquatic environments.
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Affiliation(s)
- Amber M White
- Environmental Chemistry and Technology Program, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - Sydney R Van Frost
- Department of Civil and Environmental Engineering, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - Josie M Jauquet
- Department of Civil and Environmental Engineering, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - Angela M Magness
- Department of Bacteriology, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - Katherine D McMahon
- Department of Civil and Environmental Engineering, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
- Department of Bacteriology, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - Christina K Remucal
- Environmental Chemistry and Technology Program, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
- Department of Civil and Environmental Engineering, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
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Zhou R, Dong Z, Wang L, Zhou W, Zhao W, Wu T, Chang H, Lin W, Li B. Degradation of a New Herbicide Florpyrauxifen-Benzyl in Water: Kinetics, Various Influencing Factors and Its Reaction Mechanisms. Int J Mol Sci 2023; 24:10521. [PMID: 37445703 DOI: 10.3390/ijms241310521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 06/16/2023] [Accepted: 06/18/2023] [Indexed: 07/15/2023] Open
Abstract
Florpyrauxifen-benzyl is a novel herbicide used to control weeds in paddy fields. To clarify and evaluate its hydrolytic behavior and safety in water environments, its hydrolytic characteristics were investigated under varying temperatures, pH values, initial mass concentrations and water types, as well as the effects of 40 environmental factors such as microplastics (MPs) and disposable face masks (DFMs). Meanwhile, hydrolytic products were identified by UPLC-QTOF-MS/MS, and its hydrolytic pathways were proposed. The effects of MPs and DFMs on hydrolytic products and pathways were also investigated. The results showed that hydrolysis of florpyrauxifen-benzyl was a spontaneous process driven by endothermic, base catalysis and activation entropy increase and conformed to the first-order kinetics. The temperature had an obvious effect on hydrolysis rate under alkaline condition, the hydrolysis reaction conformed to Arrhenius formula, and activation enthalpy, activation entropy, and Gibbs free energy were negatively correlated with temperature. Most of environmental factors promoted hydrolysis of florpyrauxifen-benzyl, especially the cetyltrimethyl ammonium bromide (CTAB). The hydrolysis mechanism was ester hydrolysis reaction with a main product of florpyrauxifen. The MPs and DFMs did not affect the hydrolytic mechanisms but the hydrolysis rate. The results are crucial for illustrating and assessing the environmental fate and risks of florpyrauxifen-benzyl.
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Affiliation(s)
- Rendan Zhou
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
| | - Zemin Dong
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
- Jiangxi Agricultural Technology Extension Center, Nanchang 330046, China
| | - Long Wang
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
| | - Wenwen Zhou
- College of Food Sciences, Jiangxi Agricultural University, Nanchang 330045, China
| | - Weina Zhao
- Jiangxi Agricultural Technology Extension Center, Nanchang 330046, China
| | - Tianqi Wu
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
| | - Hailong Chang
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
| | - Wei Lin
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
| | - Baotong Li
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
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Vieira LHS, Sicupira LC, Cacique AP, Silvério FO. Optimization and validation of LLE-LTP to determine florpyrauxifen-benzyl herbicide in water samples by HPLC-DAD. J Environ Sci Health B 2022; 57:697-709. [PMID: 35861013 DOI: 10.1080/03601234.2022.2099202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Florpyrauxifen-benzyl is a systemic herbicide which acts on weeds of common occurrence in rice cultivation areas using flooded or rainfed systems. The Brazilian Health Regulatory Agency (ANVISA) authorized the commercialization of this pesticide, but did not establish guidelines with an extraction and quantification method of residues of this compound as a form of environmental monitoring. Therefore, the present study aimed to optimize and validate the liquid-liquid extraction with low temperature purification (LLE-LTP) to determine florpyrauxifen-benzyl content in water samples by high performance liquid chromatography with diode array detection (HPLC-DAD). The recovery ranged from 95.84 to 105.4% with a relative standard deviation less than 1.5. LLE-LTP was selective, precise, accurate, linear in the range from 4.00 to 150 µg L-1, and the limit of quantification was 4.00 µg L-1. The stability study of the compound in water revealed its degradation in 25 days and DT50 in approximately 5 days. LLE-LTP coupled to HPLC-DAD presented itself as a simple, easy and efficient method of extracting and analyzing it in water samples.
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Affiliation(s)
- Luís H S Vieira
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, Montes Claros, Brazil
| | - Lázaro C Sicupira
- Institute of Engineering, Science and Technology, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Janaúba, Brazil
| | - Ane P Cacique
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, Montes Claros, Brazil
| | - Flaviano O Silvério
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, Montes Claros, Brazil
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Hwang JI, Norsworthy JK, González-Torralva F, Priess GL, Barber LT, Butts TR. Non-target-site resistance mechanism of barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] to florpyrauxifen-benzyl. Pest Manag Sci 2022; 78:287-295. [PMID: 34482604 DOI: 10.1002/ps.6633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/26/2021] [Accepted: 09/05/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Florpyrauxifen-benzyl (FPB) is an arylpicolinate herbicide (Group IV) for barnyardgrass control in rice. One susceptible (Sus) and three putative FPB-resistant (R1, R2, and R3) barnyardgrass biotypes were selected based on resistant/susceptible (R/S) ratios obtained from dose-response tests and used to investigate the potential resistance mechanisms. RESULTS Based on visual control results, the R/S ratios of barnyardgrass biotypes R1, R2, and R3 were 60-, 33-, and 16-fold greater than the Sus standard, respectively. Sequencing results of TIR1 and AFB genes in the tested barnyardgrass revealed no difference between Sus and R barnyardgrass biotypes. Absorption of [14 C]-FPB in Sus barnyardgrass increased over time and reached 90%, which was >10 percentage points greater than that in R biotypes. The [14 C]-FPB absorption in all R barnyardgrass equilibrated after 48 h. For both Sus and R barnyardgrass, most [14 C]-FPB absorbed was present in the treated leaf (79.8-88.8%), followed by untreated aboveground (9.5-18.6%) and belowground tissues (1.3-2.2%). No differences in translocation were observed. Differences between Sus and R barnyardgrass biotypes were found for FPB metabolism. Production of the active metabolite, florpyrauxifen-acid, was greater in Sus barnyardgrass (21.5-52.1%) than in R barnyardgrass (5.5-34.9%). CONCLUSION In conclusion, reductions in FPB absorption and florpyrauxifen-acid production may contribute to the inability to control barnyardgrass with FPB. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Fidel González-Torralva
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Grant L Priess
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - L Tom Barber
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Thomas R Butts
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
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Lim SH, Kim H, Noh TK, Lim JS, Yook MJ, Kim JW, Yi JH, Kim DS. Baseline Sensitivity of Echinochloa crus-gall and E. oryzicola to Florpyrauxifen-Benzyl, a New Synthetic Auxin Herbicide, in Korea. Front Plant Sci 2021; 12:656642. [PMID: 34177979 PMCID: PMC8221188 DOI: 10.3389/fpls.2021.656642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 05/10/2021] [Indexed: 06/13/2023]
Abstract
Echinochloa species is one of the most problematic weed species due to its high competitiveness and increasing herbicide resistance. Florpyrauxifen-benzyl, a new auxin herbicide, was recently introduced for Echinochloa management; however, the potential risk for the development of herbicide resistance in Echinochloa species has not been well-investigated. Thus, this study was conducted to evaluate the baseline sensitivity of Echinochloa species to florpyrauxifen-benzyl to estimate the risk of future resistance development. A total of 70 and 71 accessions of Echinochloa crus-galli and Echinochloa oryzicola were collected from paddy fields in Korea, respectively. These two Echinochloa species were grown in plastic pots up to the 5-leaf stage, and treated with florpyrauxifen-benzyl at a range of doses from 2.2 g to 70.0 g a.i. ha-1. Nonlinear regression analyses revealed that GR50 values for E. oryzicola ranged from 4.54 g to 29.66 g a.i. ha-1, giving a baseline sensitivity index (BSI) of 6.53, while those for E. crus-galli ranged from 6.15 g to 16.06 g a.i. ha-1, giving a BSI of 2.61. Our findings suggest that E. oryzicola has a greater potential risk than E. crus-galli for the development of metabolism-based resistance to florpyrauxifen-benzyl.
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Affiliation(s)
- Soo-Hyun Lim
- Department of Plant Science, Department of Agriculture, Forestry and Bioresources, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Harim Kim
- Department of Plant Science, Department of Agriculture, Forestry and Bioresources, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Tae-Kyeong Noh
- Department of Plant Science, Department of Agriculture, Forestry and Bioresources, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Ji-Soo Lim
- Department of Plant Science, Department of Agriculture, Forestry and Bioresources, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Min-Jung Yook
- Department of Plant Science, Department of Agriculture, Forestry and Bioresources, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Jin-Won Kim
- Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, South Korea
| | - Jee-Hwan Yi
- Integrated Field Science, Corteva Agriscience, Indianapolis, IN, United States
| | - Do-Soon Kim
- Department of Plant Science, Department of Agriculture, Forestry and Bioresources, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
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