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Wang J, Qi J, Ouyang Y, Zhou S, Qin L, Zhang B, Bai L, Pan L. The mutation Asp-376-Glu in the ALS gene confers resistance to mesosulfuron-methyl in Beckmannia syzigachne. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 215:109083. [PMID: 39216161 DOI: 10.1016/j.plaphy.2024.109083] [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: 06/21/2024] [Revised: 08/07/2024] [Accepted: 08/28/2024] [Indexed: 09/04/2024]
Abstract
Understanding the mechanisms by which weeds develop herbicide resistance is crucial for managing resistance effectively and optimizing herbicide use. Beckmannia syzigachne, a harmful grass weed prevalent in wheat and rice-wheat rotation areas, poses a significant threat to crop productivity. A field herbicide resistance survey identified a resistant population with a new ALS mutation (Asp-376-Glu). The Glu-376-Asp population displayed varying resistance levels to seven ALS herbicides, verified using the dCAPS method. qRT-PCR analysis showed that no significant difference existed in the ALS gene expression between the Asp-376-Glu and S populations. P450 and GST inhibitors failed to reverse resistance to mesosulfuron-methyl, suggesting no involvement of P450- and GST-based metabolic resistance. Molecular docking indicated that the Asp-376-Glu mutation reduces the binding affinity between ALS-inhibitors and BsALS. The findings provide valuable insights into herbicide resistance mechanisms for weed resistance control.
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Affiliation(s)
- Junzhi Wang
- College of Plant Protection, Hunan Agricultural University, Changsha, 410128, China; Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China
| | - Jiale Qi
- College of Plant Protection, Hunan Agricultural University, Changsha, 410128, China
| | - Yulan Ouyang
- College of Plant Protection, Hunan Agricultural University, Changsha, 410128, China
| | - Shuguang Zhou
- Zhejiang Xinan Chemical Industrial Group Co.,Ltd, China
| | - Long Qin
- Zhejiang Xinan Chemical Industrial Group Co.,Ltd, China
| | - Baiqing Zhang
- Zhejiang Xinan Chemical Industrial Group Co.,Ltd, China
| | - Lianyang Bai
- College of Plant Protection, Hunan Agricultural University, Changsha, 410128, China; Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China.
| | - Lang Pan
- College of Plant Protection, Hunan Agricultural University, Changsha, 410128, China.
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Yin F, Jiang J, Liao M, Cao H, Huang Z, Zhao N. Fenoxaprop-P-ethyl, mesosulfuron-ethyl, and isoproturon resistance status in Beckmannia syzigachne from wheat fields across Anhui Province, China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 198:105711. [PMID: 38225069 DOI: 10.1016/j.pestbp.2023.105711] [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: 10/13/2023] [Revised: 11/21/2023] [Accepted: 11/24/2023] [Indexed: 01/17/2024]
Abstract
Severe infestations of American sloughgrass (Beckmannia syzigachne (Steud.) Fernald) in wheat fields throughout Anhui Province, China, pose a significant threat to local agricultural production. This study aims to evaluate the susceptibility of 37 B. syzigachne populations collected from diverse wheat fields in Anhui Province to three commonly used herbicides: fenoxaprop-P-ethyl, mesosulfuron-ethyl, and isoproturon. Single-dose testing revealed that out of the 37 populations, 31, 26, and 11 populations had either evolved or were evolving resistance to fenoxaprop-P-ethyl, mesosulfuron-ethyl, and isoproturon, respectively. Among them, 25 populations displayed concurrent resistance to both fenoxaprop-P-ethyl and mesosulfuron-ethyl, while eight exhibited resistance to all three tested herbicides. Whole-plant bioassays confirmed that approximately 84% of the fenoxaprop-P-ethyl-resistant populations manifested high-level resistance (resistance index (RI) ≥10); 62% of the mesosulfuron-ethyl-resistant populations and 82% of the isoproturon-resistant populations exhibited low- to moderate-level resistance (2 ≤ RI <10). Three distinct target-site mutations were identified in 27% of fenoxaprop-P-ethyl-resistant populations, with no known resistance mutations detected in the remaining herbicide-resistant populations. The inhibition of cytochrome P450s (P450s) and/or glutathione S-transferases (GSTs) substantially increased susceptibility in the majority of resistant populations lacking mutations at the herbicide target site. In conclusion, resistance to fenoxaprop-P-ethyl and mesosulfuron-ethyl was widespread in B. syzigachne within Anhui Province's wheat fields, while resistance to isoproturon was rapidly evolving due to its escalating usage. Target-site mutations were present in approximately one-third of fenoxaprop-P-ethyl-resistant populations, and alternative mechanisms involving P450s and/or GSTs could explain the resistance observed in most of the remaining populations.
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Affiliation(s)
- Fan Yin
- Anhui Province key Laboratory of Crop Integrated Pest Management & Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Jinfang Jiang
- Anhui Province key Laboratory of Crop Integrated Pest Management & Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Min Liao
- Anhui Province key Laboratory of Crop Integrated Pest Management & Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Haiqun Cao
- Anhui Province key Laboratory of Crop Integrated Pest Management & Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Zhaofeng Huang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China.
| | - Ning Zhao
- Anhui Province key Laboratory of Crop Integrated Pest Management & Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China.
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Han Y, Sun Y, Ma H, Wang R, Lan Y, Gao H, Huang Z. Target-site and non-target-site based resistance to clodinafop-propargyl in wild oats (Avena fatua L.). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 197:105650. [PMID: 38072525 DOI: 10.1016/j.pestbp.2023.105650] [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: 07/04/2023] [Revised: 10/04/2023] [Accepted: 10/13/2023] [Indexed: 12/18/2023]
Abstract
Wild oat (Avena fatua L.) is a common and problematic weed in wheat fields in China. In recent years, farmers found it increasingly difficult to control A. fatua using acetyl-CoA carboxylase (ACCase)-inhibiting herbicides. The purpose of this study was to identify the molecular basis of clodinafop-propargyl resistance in A. fatua. In comparison to the S1496 population, whole dose response studies revealed that the R1623 and R1625 populations were 71.71- and 67.76-fold resistant to clodinafop-propargyl, respectively. The two resistant A. fatua populations displayed high resistance to fenoxaprop-p-ethyl (APP) and low resistance to clethodim (CHD) and pinoxaden (PPZ), but they were still sensitive to the ALS inhibitors mesosulfuron-methyl and pyroxsulam. An Ile-2041-Asn mutation was identified in both resistant individual plants. The copy number and relative expression of the ACCase gene in the resistant population were not significantly different from those in the S1496 population. Under the application of 2160 g ai ha -1 of clodinafop-propargyl, the fresh weight of the R1623 population was reduced to 74.9%; however, pretreatment with the application of the cytochrome P450 inhibitor malathion and the GST inhibitor NBD-Cl reduced the fresh weight to 50.91% and 47.16%, respectively, which proved the presence of metabolic resistance. This is the first report of an Ile-2041-Asn mutation and probable metabolic resistance in A. fatua, resulting in resistance to clodinafop-propargyl.
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Affiliation(s)
- Yujun Han
- College of Plant Protection, Northeast Agricultural University, Harbin 150030, China
| | - Ying Sun
- College of Plant Protection, Northeast Agricultural University, Harbin 150030, China; State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Hong Ma
- College of Plant Protection, Northeast Agricultural University, Harbin 150030, China
| | - Ruolin Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yuning Lan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Haifeng Gao
- Institute of Plant Protection, Xinjiang Academy of Agricultural Sciences, Key Laboratory of Integrated Pest Management on Crop in Northwestern Oasis, Urumqi 830091, China.
| | - Zhaofeng Huang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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Jiang M, Wang Y, Li W, Li Q, Zhang J, Liao M, Zhao N, Cao H. Investigating resistance levels to cyhalofop-butyl and mechanisms involved in Chinese sprangletop (Leptochloa chinensis L.) from Anhui Province, China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 186:105165. [PMID: 35973761 DOI: 10.1016/j.pestbp.2022.105165] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/28/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
Chinese sprangletop (Leptochloa chinensis (L.) Nees) is a common grass species that severely threatens rice (Oryza sativa L.) cropping systems globally. Cyhalofop-butyl is a highly efficient acetyl-CoA carboxylase (ACCase)-inhibiting herbicide widely used for control of this species in China. However, some L. chinensis populations have gradually evolved resistance to this herbicide in recent years. To better understand the cyhalofop-butyl resistance status of L. chinensis in the major rice planting area of the middle-lower Yangtze River basin, 73 populations collected from the rice fields across Anhui Province were investigated for cyhalofop-butyl susceptibility and potential herbicide resistance-conferring mutations. Single-dose testing indicated that of the 73 populations, 25 had evolved resistance to cyhalofop-butyl and were separately classified as "RRR" and "RR" populations according to their fresh weight reductions, 8 had a high risk of evolving cyhalofop-butyl resistance and were classified as "R?" populations, and 40 were susceptible and classified as "S" populations. Whole-plant dose-response experiments showed that the resistance index (RI) of these R?, RR, and RRR populations to cyhalofop-butyl ranged from 2.47 to 36.94. Target gene sequencing identified seven ACCase resistance mutations (I1781L, W1999C, W2027S, W2027L, W2027C, I2041N, and D2078G), with W1999C and W2027C the two most common detected in about three quarters of all the resistant populations. Seven populations including LASC3, BBHY1, AQQS1, HFFD3, HFFD4, AQWJ1, and HFLJ6 each carrying a specific ACCase mutation were tested for their cross- and multiple-resistance patterns. Compared with a standard susceptible population HFLY1, the seven resistant populations showed distinct cross-resistance. All had low- to high-level cross-resistance to metamifop (RIs ranging from 6.16 to 17.65), fenoxaprop-P-ethyl (RIs ranging from 6.39 to 24.08), and quizalofop-P-ethyl (RIs ranging from 2.20 to 10.25), but responded differently to clodinafop-propargyl and clethodim. Multiple-resistance testing suggested that the seven resistant populations were all susceptible to the 4-hydroxyphenylpyruvate dioxygenase inhibitor tripyrasulfone, the protoporphyrinogen oxidase inhibitor oxyfluorfen, and the auxin mimic herbicide florpyrauxifen. In conclusion, this study has shown that cyhalofop-butyl resistance was prevalent in L. chinensis in Anhui Province, China, and target site mutation was one of the most common resistance mechanisms.
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Affiliation(s)
- Minghao Jiang
- Anhui Province key Laboratory of Crop Integrated Pest Management, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Yafei Wang
- Anhui Province key Laboratory of Crop Integrated Pest Management, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Wei Li
- Anhui Province key Laboratory of Crop Integrated Pest Management, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Qi Li
- Anhui Province key Laboratory of Crop Integrated Pest Management, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Jingxu Zhang
- Anhui Province key Laboratory of Crop Integrated Pest Management, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Min Liao
- Anhui Province key Laboratory of Crop Integrated Pest Management, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Ning Zhao
- Anhui Province key Laboratory of Crop Integrated Pest Management, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China.
| | - Haiqun Cao
- Anhui Province key Laboratory of Crop Integrated Pest Management, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China.
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Lan Y, Li W, Wei S, Huang H, Liu Z, Huang Z. Multiple resistance to ACCase- and ALS-inhibiting herbicides in black-grass (Alopecurus myosuroides Huds.) in China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 184:105127. [PMID: 35715065 DOI: 10.1016/j.pestbp.2022.105127] [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: 02/26/2022] [Revised: 05/15/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Two black-grass (Alopecurus myosuroides Huds.) populations (R2105 and R1027) that were suspected to be resistant to clodinafop-propargyl, an acetyl-CoAcarboxylase (ACCase) inhibitor, were found in winter wheat fields in China. Research was carried out to investigate whether resistance to clodinafop-propargyl was present and the molecular mechanism of herbicide resistance in these two populations. Dose-response assays confirmed high level resistance to clodinafop-propargyl in both R2105 and R1027 populations, with resistance indexes 25.1 and 22.1. ACCase gene sequence comparison revealed three amino acid mutations (Trp-1999-Leu, Ile-2041-Asn, or Asp-2078-Gly) in R2105 population and Ile-2041-Asn mutation in R1027 population. Sensitivity to other herbicides assays indicated that R2105 and R1027 populations were cross resistant to fenoxaprop-P-ethyl and multiple resistant to pyroxsulam and mesosulfuron-methyl. The ALS gene sequence analysis revealed that all resistant individuals in R2105 and R1027 populations had the Trp-574-Leu mutation. Applying malathion, significantly decreased the rate of metabolism of clodinafop-propargyl in both R2105 and R1027 populations. This is the first report of multiple resistance to ACCase- and ALS-inhibiting herbicides conferred by target-site mutations and enhanced metabolism in black-grass in China.
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Affiliation(s)
- Yuning Lan
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wenyu Li
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China; College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, China
| | - Shouhui Wei
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hongjuan Huang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhen Liu
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhaofeng Huang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
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Kaundun SS, Downes J, Jackson LV, Hutchings SJ, Mcindoe E. Impact of a Novel W2027L Mutation and Non-Target Site Resistance on Acetyl-CoA Carboxylase-Inhibiting Herbicides in a French Lolium multiflorum Population. Genes (Basel) 2021; 12:genes12111838. [PMID: 34828444 PMCID: PMC8620607 DOI: 10.3390/genes12111838] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/18/2021] [Accepted: 11/18/2021] [Indexed: 11/24/2022] Open
Abstract
Herbicides that inhibit acetyl-CoA carboxylase (ACCase) are among the few remaining options for the post-emergence control of Lolium species in small grain cereal crops. Here, we determined the mechanism of resistance to ACCase herbicides in a Lolium multiflorum population (HGR) from France. A combined biological and molecular approach detected a novel W2027L ACCase mutation that affects aryloxyphenoxypropionate (FOP) but not cyclohexanedione (DIM) or phenylpyraxoline (DEN) subclasses of ACCase herbicides. Both the wild-type tryptophan and mutant leucine 2027-ACCase alleles could be positively detected in a single DNA-based-derived polymorphic amplified cleaved sequence (dPACS) assay that contained the targeted PCR product and a cocktail of two discriminating restriction enzymes. Additionally, we identified three well-characterised I1781L, I2041T, and D2078G ACCase target site resistance mutations as well as non-target site resistance in HGR. The non-target site component endowed high levels of resistance to FOP herbicides whilst partially impacting on the efficacy of pinoxaden and cycloxydim. This study adequately assessed the contribution of the W2027L mutation and non-target site mechanism in conferring resistance to ACCase herbicides in HGR. It also highlights the versatility and robustness of the dPACS method to simultaneously identify different resistance-causing alleles at a single ACCase codon.
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Vázquez-García JG, Torra J, Palma-Bautista C, Alcántara-de la Cruz R, Prado RD. Point Mutations and Cytochrome P450 Can Contribute to Resistance to ACCase-Inhibiting Herbicides in Three Phalaris Species. PLANTS 2021; 10:plants10081703. [PMID: 34451748 PMCID: PMC8401167 DOI: 10.3390/plants10081703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 11/13/2022]
Abstract
Species of Phalaris have historically been controlled by acetyl-coenzyme A carboxylase (ACCase)-inhibiting herbicides; however, overreliance on herbicides with this mechanism of action has resulted in the selection of resistant biotypes. The resistance to ACCase-inhibiting herbicides was characterized in Phalaris brachystachys, Phalaris minor, and Phalaris paradoxa samples collected from winter wheat fields in northern Iran. Three resistant (R) biotypes, one of each Phalaris species, presented high cross-resistance levels to diclofop-methyl, cycloxydim, and pinoxaden, which belong to the chemical families of aryloxyphenoxypropionates (FOPs), cyclohexanediones (DIMs), and phenylpyrazolines (DENs), respectively. The metabolism of 14C-diclofop-methyl contributed to the resistance of the P. brachystachys R biotype, while no evidence of herbicide metabolism was found in P. minor or P. paradoxa. ACCase in vitro assays showed that the target sites were very sensitive to FOP, DIM, and DEN herbicides in the S biotypes of the three species, while the R Phalaris spp. biotypes presented different levels of resistance to these herbicides. ACCase gene sequencing confirmed that cross-resistance in Phalaris species was conferred by specific point mutations. Resistance in the P. brachystachys R biotype was due to target site and non-target-site resistance mechanisms, while in P. minor and P. paradoxa, only an altered target site was found.
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Affiliation(s)
- José G. Vázquez-García
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 14014 Córdoba, Spain;
- Correspondence: (J.G.V.-G.); (R.D.P.); Tel.: +34-95-721-8600 (R.D.P.)
| | - Joel Torra
- Department d’Hortofruticultura, Botànica i Jardineria, Agrotecnio, Universitat de Lleida, 25198 Lleida, Spain;
| | - Candelario Palma-Bautista
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 14014 Córdoba, Spain;
| | - Ricardo Alcántara-de la Cruz
- Centro de Ciências da Natureza, Campus Lagoa do Sino, Universidade Federal de São Carlos, Buri 18290-000, Brazil;
| | - Rafael De Prado
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 14014 Córdoba, Spain;
- Correspondence: (J.G.V.-G.); (R.D.P.); Tel.: +34-95-721-8600 (R.D.P.)
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Zheng Y, Luo M, Li Y, Wang Y. The complete chloroplast genome sequence of Beckmannia syzigachne. Mitochondrial DNA B Resour 2021; 6:344-345. [PMID: 33659672 PMCID: PMC7872532 DOI: 10.1080/23802359.2020.1867013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The first complete chloroplast genome (cpDNA) sequence of Beckmannia syzigachne was determined from Illumina HiSeq pair-end sequencing data in this study. The cpDNA is 136,181 bp in length, contains a large single-copy region (LSC) of 80,345 bp and a small single-copy region (SSC) of 12,810 bp, which were separated by a pair of inverted repeats (IR) regions of 21,513 bp. The genome contains 132 genes, including 85 protein-coding genes, 8 ribosomal RNA genes, and 39 transfer RNA genes. Further phylogenomic analysis showed that B. syzigachne clustered in a unique clade in the Pooideae subfamily.
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Affiliation(s)
- Yuan Zheng
- College of Forestry, Southwest Forestry University, Kunming, Yunnan, People's Republic of China
- Laboratory of Forest Plant Cultivation and Utilization, Yunnan Academy of Forestry & Grassland Science, Kunming, Yunnan, People's Republic of China
| | - Maniya Luo
- College of Forestry, Southwest Forestry University, Kunming, Yunnan, People's Republic of China
| | - Yunqin Li
- Laboratory of Forest Plant Cultivation and Utilization, Yunnan Academy of Forestry & Grassland Science, Kunming, Yunnan, People's Republic of China
| | - Yi Wang
- Laboratory of Forest Plant Cultivation and Utilization, Yunnan Academy of Forestry & Grassland Science, Kunming, Yunnan, People's Republic of China
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Wang J, Chen J, Li X, Li D, Li Z, Cui H. Pro-197-Ser Mutation in ALS and High-Level GST Activities: Multiple Resistance to ALS and ACCase Inhibitors in Beckmannia syzigachne. FRONTIERS IN PLANT SCIENCE 2020; 11:572610. [PMID: 33101340 PMCID: PMC7556300 DOI: 10.3389/fpls.2020.572610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 09/11/2020] [Indexed: 06/02/2023]
Abstract
American sloughgrass (Beckmannia syzigachne Steud.) is one of the most troublesome weeds infesting wheat and canola fields in China. Some biotypes cannot be controlled, either by acetolactate synthase (ALS) or acetyl coenzyme A carboxylase (ACCase) inhibitors, which are the main herbicides for controlling this weed. However, very few studies have investigated multiple resistance mechanism in B. syzigachne. In this study, a B. syzigachne biotype with a high resistance to ALS inhibitors we have reported was also showed relatively lower resistance to ACCase inhibitors, with a resistance index around 7. RNA-seq analysis was used to investigate the factors responsible for multiple resistance, and 60,108 unigenes were assembled by de novo transcriptome assembly and then annotated across eight databases. A Pro-197-Ser mutation was identified in the ALS gene by SNPs analysis and validated by PCR, while no mutation was identified in the ACCase gene. Nineteen candidate metabolic genes were screened and their overexpression was confirmed by qPCR. The expression of GST-T3 and GST-U6 in resistant plants ranged from 7.5- to 109.4-folds than that in susceptible ones at different times after two kinds of herbicide treatment. In addition, GST activities in resistant plants were 3.0-5.0 times higher than that in susceptible plants. Other novel resistance factors also showed high correlation with multiple resistance which included four genes encoding disease resistance proteins, a transcription factor (MYC3), and one gene conferring blight resistance. In this research, a B. syzigachne biotype was confirmed to have evolved multiple resistance to ACCase and ALS inhibitors. The Pro-197-Ser mutation in ALS gene and high-level GST activities were confirmed responsible for the multiple resistance. Characterized disease-resistance proteins, transcription factor, and blight-resistance proteins may play an essential role in these multiple herbicide resistance.
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Bai S, Zhao Y, Zhou Y, Wang M, Li Y, Luo X, Li L. Identification and expression of main genes involved in non-target site resistance mechanisms to fenoxaprop-p-ethyl in Beckmannia syzigachne. PEST MANAGEMENT SCIENCE 2020; 76:2619-2626. [PMID: 32083373 DOI: 10.1002/ps.5800] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 02/12/2020] [Accepted: 02/21/2020] [Indexed: 05/13/2023]
Abstract
BACKGROUND Non-target-site resistance (NTSR) to herbicides is a serious threat to global agriculture. Although metabolic resistance is the dominant mechanism of NTSR, the molecular mechanisms are not yet well-characterized. This study aimed to uncover the likely metabolism-related genes in Beckmannia syzigachne (American sloughgrass) resistant to fenoxaprop-p-ethyl. RESULTS Ultra-performance liquid chromatography - tandem mass spectrometry experiments showed that the resistant American sloughgrass biotype (R, SD-04-SS) showed enhanced degradation of this herbicide compared to the susceptible biotype (S, SD-12). R and S biotype were harvested at 24 h after fenoxaprop-p-ethyl treatment to conduct RNA sequencing (RNA-Seq) analysis to investigate the likely fenoxaprop-p-ethyl metabolic genes. The RNA-Seq libraries yield 417 969 980 clean reads. The de novo assembly generated 115 112 unigenes, of which 57 906 unigenes were annotated. Finally, we identified 273 cytochrome P450s, 178 oxidases, 47 glutathione S-transferases (GSTs), 166 glucosyltransferases (GTs) and 180 ABC transporter genes to determine the likely fenoxaprop-p-ethyl metabolism-related genes in R biotype. Twelve overlapping up-regulated genes in the R biotype (fenoxaprop-p-ethyl-treated R/non-treated R, fenoxaprop-p-ethyl-treated R/fenoxaprop-p-ethyl-treated S) were identified by RNA-Seq and the results were validated using qRT-PCR. Ten were identified as fenoxaprop-p-ethyl metabolism-related genes, including three P450s (homologous to CYP71D7, CYP99A2 and CYP71D10), one GST (homologous to GSTF1), two GTs (homologous to UGT90A1 and UGT83A1) and four oxidase genes. CONCLUSION This work demonstrates that the NTSR mechanism by means of enhanced detoxification of fenoxaprop-p-ethyl in American sloughgrass is very likely driven by herbicide metabolism related genes. The RNA-Seq data presented here provide a valuable resource for understanding the molecular mechanism of NTSR in American sloughgrass. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Shuang Bai
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
- Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao, China
| | - Yanfang Zhao
- College of Chemistry and Pharmacy, Qingdao Agricultural University, Qingdao, China
| | - Yuanming Zhou
- Central Laboratory of Qingdao Agricultural University, Qingdao, China
| | - Mingliang Wang
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
- Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao, China
| | - Yihui Li
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
- Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao, China
| | - Xiaoyong Luo
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
- Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao, China
| | - Lingxu Li
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
- Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao, China
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11
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Golmohammadzadeh S, Rojano-Delgado AM, Vázquez-García JG, Romano Y, Osuna MD, Gherekhloo J, De Prado R. Cross-resistance mechanisms to ACCase-inhibiting herbicides in short-spike canarygrass (Phalaris brachystachys). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 151:681-688. [PMID: 32353674 DOI: 10.1016/j.plaphy.2020.03.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 03/24/2020] [Accepted: 03/26/2020] [Indexed: 06/11/2023]
Abstract
Herbicides that inhibit acetyl-coenzyme A carboxylase (ACCase) are commonly used to control weedy grasses such as short-spike canarygrass (Phalaris brachystachys). Two resistant biotypes of P. brachystachys (R1 and R2) were found in different winter wheat fields in Iran. This study was done to confirm the suspected resistance observed in the field and to elucidate the resistance mechanisms involved. The results indicated that the both resistant biotypes showed cross-resistance to diclofop-methyl (DM), pinoxaden (PN) and cycloxydim (CD) herbicides. Based on the herbicide dose that inhibited 50% of the ACCase activity (I50), the ACCase activity of the resistant biotypes was less sensitive than the S biotype to DM, CD, and PN. No differences in translocation were detected between biotypes; most of the herbicide remained in the treated leaves. The 14C-DM metabolites were identified using thin-layer chromatography. Pre-treatment with the cytochrome P450 inhibitor ABT inhibited 14C-DM metabolism in the R1 biotype, indicating that metabolism is involved in the DM resistance in the R1 biotype. DNA sequencing studies found an Ile-1781-Thr change in both resistant biotypes, conferring cross-resistance to ACCase inhibitors. In general, in the R1 biotype which showed a higher level of resistance than that of the R2 biotype, cross-resistance was observed because of mutation and DM metabolism, while in the R2 biotype, the mutation confers resistance to ACCase-inhibiting herbicides. This is the first reported evidence of the mechanisms responsible for the resistance to ACCase herbicides in P. brachystachys. These results could be useful for improved management of resistant biotypes carrying similar mutations.
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Affiliation(s)
- Sajedeh Golmohammadzadeh
- Department of Agronomy, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, 4918943464, Iran
| | - Antonia M Rojano-Delgado
- Department of Agricultural Chemistry and Soil Science, University of Córdoba, 14014, Córdoba, Spain
| | - Jose G Vázquez-García
- Department of Agricultural Chemistry and Soil Science, University of Córdoba, 14014, Córdoba, Spain
| | - Yolanda Romano
- Center for Scientific and Technological Research of Extremadura (CICYTEX), 06187, Badajoz, Spain
| | - Maria D Osuna
- Center for Scientific and Technological Research of Extremadura (CICYTEX), 06187, Badajoz, Spain
| | - Javid Gherekhloo
- Department of Agronomy, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, 4918943464, Iran
| | - Rafael De Prado
- Department of Agricultural Chemistry and Soil Science, University of Córdoba, 14014, Córdoba, Spain.
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12
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Deng W, Yang Q, Chen Y, Yang M, Xia Z, Zhu J, Chen Y, Cai J, Yuan S. Cyhalofop-butyl and Glyphosate Multiple-Herbicide Resistance Evolved in an Eleusine indica Population Collected in Chinese Direct-Seeding Rice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:2623-2630. [PMID: 32058714 DOI: 10.1021/acs.jafc.9b07342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Eleusine indica is a typical xerophytic weed species with a cosmopolitan distribution. It is invasive and highly adaptable to diverse habitats and crops. Due to rice cropping-pattern changes, E indica has become one of the main dominant grass weeds infecting direct-seeding paddy fields. A Chinese E. indica population has evolved multiple-herbicide resistance to cyhalofop-butyl and glyphosate. In this study, the multiple-resistance profile of E. indica to these two different types of herbicides and their resistance mechanisms were investigated. Whole-plant dose-response assays indicated that the multiple-herbicide-resistant (MHR) population exhibited 10.8-fold resistance to cyhalofop-butyl and 3.1-fold resistance to glyphosate compared with the susceptible (S) population. ACCase sequencing revealed that the Asp-2078-Gly mutation was strongly associated with E. indica resistance to cyhalofop-butyl. The MHR plants accumulated less shikimic acid than S plants at 4, 6, and 8 days after glyphosate treatment. In addition, no amino acid substitution in the EPSPS gene was found in MHR plants. Further analysis revealed that the relative expression level of EPSPS in MHR plants was 6-10-fold higher than that in S plants following glyphosate treatment, indicating that EPSPS overexpression may contribute to the glyphosate resistance. Furthermore, the effectiveness of nine post-emergence herbicides against E. indica were evaluated, and one PPO inhibitor pyraclonil was identified as highly effective in controlling the S and MHR E. indica populations.
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Affiliation(s)
- Wei Deng
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou 225009, China
| | - Qian Yang
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Yongrui Chen
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou 225009, China
| | - Mengting Yang
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou 225009, China
| | - Zhiming Xia
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou 225009, China
| | - Jin Zhu
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou 225009, China
| | - Yueyang Chen
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou 225009, China
| | - Jingxuan Cai
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou 225009, China
| | - Shuzhong Yuan
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou 225009, China
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13
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Liu B, Ding F, Wang M, Wang F, Luo X, Li L. Cross-resistance pattern to ACCase-inhibiting herbicides in a novel Trp 1999Leu mutation American sloughgrass (Beckmannia syzigachne) population. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 159:80-84. [PMID: 31400787 DOI: 10.1016/j.pestbp.2019.05.019] [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] [Received: 01/30/2019] [Revised: 05/18/2019] [Accepted: 05/25/2019] [Indexed: 05/13/2023]
Abstract
The plastid acetyl coenzyme carboxylase (ACCase) Trp1999Leu mutation was identified in a Beckmannia syzigachne population resistant to fenoxaprop-p-ethyl. The pattern of cross-resistance for the Trp1999Leu mutation is still ambiguous. In this paper, mutant homozygote (1999Leu/Leu, RR) and wild type (1999Trp/Trp, SS) B. syzigachne plants with the same genetic background were purified from the JS-26 population using the dCAPS method. The activity of ACCase in RR and SS was determined. Then, the cross-resistance pattern to ACCase inhibiting herbicides of the Trp1999Leu mutation was determined using the whole-plant method. ACCase activity showed that the Trp1999Leu mutation decreased ACCase sensitivity to fenoxaprop-p-ethyl by 2.73-fold. A dose-response experiment indicated that the Trp1999Leu mutation conferred high resistance to quizalofop-p-ethyl (20.29-fold), metamifop (12.22-fold) and pinoxaden (18.60-fold), moderate resistance to fenoxaprop-p-ethyl (8.20-fold) and sethoxydim (6.38-fold), low resistance to cyhalofop-butyl (2.73-fold) and no resistance to clodinafop-propargyl (1.42 fold) and clethodim (1.59-fold). This is the first report of the role of Trp1999Leu in fenoxaprop-p-ethyl resistance and of the patterns of cross-resistance to ACCase-inhibiting herbicides in B. syzigachne.
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Affiliation(s)
- Bingqi Liu
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China; Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao 266109, PR China
| | - Fei Ding
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China; Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao 266109, PR China
| | - Mingliang Wang
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China; Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao 266109, PR China
| | - Fei Wang
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China
| | - Xiaoyong Luo
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China; Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao 266109, PR China
| | - Lingxu Li
- College of Plant Health and Medicine, Qingdao Agricultural University, No.700 of Chang Cheng Road, Chengyang District, Qingdao 266109, PR China; Key Laboratory of Integrated Crop Pest Management of Shandong Province, Qingdao 266109, PR China.
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14
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Deng W, Cai J, Zhang J, Chen Y, Chen Y, Di Y, Yuan S. Molecular basis of resistance to ACCase-inhibiting herbicide cyhalofop-butyl in Chinese sprangletop (Leptochloa chinensis (L.) Nees) from China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 158:143-148. [PMID: 31378350 DOI: 10.1016/j.pestbp.2019.05.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/07/2019] [Accepted: 05/10/2019] [Indexed: 06/10/2023]
Abstract
Chinese sprangletop (Leptochloa chinensis (L.) Nees) is one of the most troublesome grass weeds in rice in China. Seven suspected cyhalofop-butyl-resistant L. chinensis populations were collected from different rice fields with a history of cyhalofop-butyl use. The level of resistance and resistance mechanisms in seven populations were studied. Dose-response tests indicated that five populations (JS3, JS4, JS6, JS7 and JS8) had evolved high-level resistance (26.9 to 123.0-fold) to cyhalofop-butyl compared with the susceptible (S) population, and other two populations (JS2 and JS5) were still sensitive to the herbicide. Two acetyl-coenzyme A carboxylase (ACCase) genes were cloned from each population, and three different ACCase mutations (Ile-1781-Leu, Trp-1999-Cys, and Trp-2027-Cys) in ACCase2 gene were determined in different resistant (R) populations. In addition, no resistance-conferring mutations was detected in the R population (JS7), and ACCase gene expression was similar between the S and R populations. Thus, non-target-site resistance mechanisms may be involved in the JS7 population. Moreover, the patterns of cross-resistance of JS6 (Ile-1781-Leu), JS4 (Trp-1999-Cys), JS8 (Trp-2027-Cys), and JS7 (unknown resistance mechanisms) populations to other ACCase-inhibiting herbicides were determined. The JS6 and JS8 populations showed resistance to fenoxaprop-P-ethyl, metamifop, clethodim and pinoxaden, the JS4 population was resistant to fenoxaprop-P-ethyl, metamifop and pinoxaden, and the JS7 population had resistance only to fenoxaprop-P-ethyl and metamifop. These results indicated the diversity of the target-site mutations in ACCase gene of L. chinensis, and provide a better understanding of cross-resistance in L. chinensis, which would be helpful for the management of cyhalofop-butyl-resistant L. chinensis.
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Affiliation(s)
- Wei Deng
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou, China
| | - Jingxuan Cai
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou, China
| | - Jingyun Zhang
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou, China
| | - Yueyang Chen
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou, China
| | - Yongrui Chen
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou, China
| | - Yingjie Di
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou, China
| | - Shuzhong Yuan
- College of Horticulture and Plant Protection, Yangzhou University, No. 88 of Da Xue Nan Road, Hanjiang District, Yangzhou, China.
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15
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Du L, Qu M, Jiang X, Li X, Ju Q, Lu X, Wang J. Fitness costs associated with acetyl-coenzyme A carboxylase mutations endowing herbicide resistance in American sloughgrass ( Beckmannia syzigachne Steud.). Ecol Evol 2019; 9:2220-2230. [PMID: 30847106 PMCID: PMC6392401 DOI: 10.1002/ece3.4917] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 11/27/2018] [Accepted: 12/28/2018] [Indexed: 01/07/2023] Open
Abstract
Weed resistance to herbicide can be conferred by gene mutations, and some mutations can cause pleiotropic effects in some cases. We investigated the pleiotropic effects associated with five specific ACCase mutations (Ile1781Leu, Trp2027Cys, Ile2041Asn, Asp2078Gly, and Gly2096Ala) on the plant growth, seed production, and resource competitiveness in American sloughgrass.Resistant plants (M/M) homozygous for specific ACCase mutation and susceptible wild-type plants (W/W) were derived from single heterozygous mother plant (M/W) by genotyping. Plant growth assay and neighborhood experiments were performed to quantify variation between M/M plants and W/W plants.The Ile1781Leu mutation resulted in slight increases in plant growth in pure stands and improved resource competitiveness under low-competition conditions in pot experiments, but no clear variation was observed under high competitive pressure or field conditions. During competition with wheat plants under field conditions, American sloughgrass plants containing Ile2041Asn ACCase exhibited a significantly lower (12.5%) aboveground biomass but no distinct differences in seed production or resource competitiveness. No significant detrimental pleiotropic effects associated with Gly2096Ala were detected in American sloughgrass.The Trp2027Cys mutation distinctly reduced seed production, especially under high competitive pressure, but did not significantly alter plant growth. The Asp2078Gly mutation consistently reduced not only plant growth and seed production but also resource competitiveness. Synthesis. The Trp2027Cys and Asp2078Gly mutations led to significant fitness costs, which may reduce the frequency of resistance alleles and reduce the propagation speed of resistant weeds in the absence of ACCase inhibitor herbicides. The Ile1781Leu, Ile2041Asn, and Gly2096Ala mutations displayed no obvious fitness costs or displayed very small fitness penalties, which would likely have no effect on the establishment of resistant weeds in the field.
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Affiliation(s)
- Long Du
- Pest Bio‐control LabShandong Peanut Research InstituteQingdaoChina
| | - Mingjing Qu
- Pest Bio‐control LabShandong Peanut Research InstituteQingdaoChina
| | - Xiaojing Jiang
- Pest Bio‐control LabShandong Peanut Research InstituteQingdaoChina
| | - Xiao Li
- Pest Bio‐control LabShandong Peanut Research InstituteQingdaoChina
| | - Qian Ju
- Pest Bio‐control LabShandong Peanut Research InstituteQingdaoChina
| | - Xingtao Lu
- Institute of Plant ProtectionTai'an Academy of Agricultural SciencesTai'anChina
| | - Jinxin Wang
- College of Plant ProtectionShandong Agricultural UniversityTai'anChina
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16
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Yu J, Gao H, Pan L, Yao Z, Dong L. Mechanism of resistance to cyhalofop-butyl in Chinese sprangletop (Leptochloa chinensis (L.) Nees). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 143:306-311. [PMID: 29183606 DOI: 10.1016/j.pestbp.2016.11.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 10/31/2016] [Accepted: 11/08/2016] [Indexed: 06/07/2023]
Abstract
Chinese sprangletop (Leptochloa chinensis (L.) Nees) is a serious grass weed in rice paddies. In some areas, L. chinensis has become resistant to the herbicide cyhalofop-butyl because of its frequent and extensive use over the past five years. In this study, whole-plant dose-response assays were conducted, and a L. chinensis population (ZHYH) had a 75.8-fold resistance index to cyhalofop-butyl. Molecular analyses revealed that this resistance was attributed to a tryptophan (Trp)-2027-to-cysteine (Cys) substitution in the CT domain of the ACCase gene. To our knowledge, this is the first report revealing the mechanism underlying cyhalofop-butyl resistance in L. chinensis. Furthermore, a derived cleaved amplified polymorphic (dCAPS) assay was developed to rapidly detect the Trp-2027-Cys mutation. Of the 100 ZHYH plants analyzed, 52 were heterozygous mutants and 48 were susceptible homozygous plants. In addition, the cyhalofop-butyl-resistant L. chinensis was cross-resistant to aryloxyphenoxypropionate and phenylpyrazoline herbicides, but not to cyclohexanedione, acetolactate synthase-inhibiting, protoporphyrinogen oxidase, and urea herbicides, and had only slight resistance to the hormonal herbicide quinclorac.
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Affiliation(s)
- Jiaxing Yu
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Haitao Gao
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Lang Pan
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | | | - Liyao Dong
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China.
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17
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Fernández P, Alcántara-de la Cruz R, Cruz-Hipólito H, Osuna MD, De Prado R. Underlying Resistance Mechanisms in the Cynosurus echinatus Biotype to Acetyl CoA Carboxylase-Inhibiting Herbicides. FRONTIERS IN PLANT SCIENCE 2016; 7:449. [PMID: 27148285 PMCID: PMC4826872 DOI: 10.3389/fpls.2016.00449] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 03/22/2016] [Indexed: 05/25/2023]
Abstract
Hedgehog dogtail (Cynosurus echinatus) is an annual grass, native to Europe, but also widely distributed in North and South America, South Africa, and Australia. Two hedgehog dogtail biotypes, one diclofop-methyl (DM)-resistant and one DM-susceptible were studied in detail for experimental dose-response resistance mechanisms. Herbicide rates that inhibited shoot growth by 50% (GR50) were determined for DM, being the resistance factor (GR50R/GR50S) of 43.81. When amitrole (Cyt. P450 inhibitor) was applied before treatment with DM, the R biotype growth was significantly inhibited (GR50 of 1019.9 g ai ha(-1)) compared with the GR50 (1484.6 g ai ha(-1)) found for the R biotype without pretreatment with amitrole. However, GR50 values for S biotype do not vary with or without amitrole pretreatment. Dose-response experiments carried out to evaluate cross-resistance, showed resistance to aryloxyphenoxypropionate (APP), cyclohexanedione (CHD) and phenylpyrazoline (PPZ) inhibiting herbicides. Both R and S biotypes had a similar (14)C-DM uptake and translocation. The herbicide was poorly distributed among leaves, the rest of the shoot and roots with unappreciable acropetal and/or basipetal DM translocation at 96 h after treatment (HAT). The metabolism of (14)C-DM, D-acid and D-conjugate metabolites were identified by thin-layer chromatography. The results showed that DM resistance in C. echinatus is likely due to enhanced herbicide metabolism, involving Cyt. P450 as was demonstrated by indirect assays (amitrole pretreatment). The ACCase in vitro assays showed that the target site was very sensitive to APP, CHD and PPZ herbicides in the C. echinatus S biotype, while the R biotype was insensitive to the previously mentioned herbicides. DNA sequencing studies confirmed that C. echinatus cross-resistance to ACCase inhibitors has been conferred by specific ACCase double point mutations Ile-2041-Asn and Cys-2088-Arg.
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Affiliation(s)
- Pablo Fernández
- Department of Agricultural Chemistry and Edaphology, University of CordobaCordoba, Spain
| | | | | | - María D. Osuna
- Agrarian Research Center “Finca La Orden" ValdesequeraBadajoz, Spain
| | - Rafael De Prado
- Department of Agricultural Chemistry and Edaphology, University of CordobaCordoba, Spain
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