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Kababji AM, Butt H, Mahfouz M. Synthetic directed evolution for targeted engineering of plant traits. FRONTIERS IN PLANT SCIENCE 2024; 15:1449579. [PMID: 39286837 PMCID: PMC11402689 DOI: 10.3389/fpls.2024.1449579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2024] [Accepted: 08/12/2024] [Indexed: 09/19/2024]
Abstract
Improving crop traits requires genetic diversity, which allows breeders to select advantageous alleles of key genes. In species or loci that lack sufficient genetic diversity, synthetic directed evolution (SDE) can supplement natural variation, thus expanding the possibilities for trait engineering. In this review, we explore recent advances and applications of SDE for crop improvement, highlighting potential targets (coding sequences and cis-regulatory elements) and computational tools to enhance crop resilience and performance across diverse environments. Recent advancements in SDE approaches have streamlined the generation of variants and the selection processes; by leveraging these advanced technologies and principles, we can minimize concerns about host fitness and unintended effects, thus opening promising avenues for effectively enhancing crop traits.
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Affiliation(s)
- Ahad Moussa Kababji
- Laboratory for Genome Engineering and Synthetic Biology, Division of Biological Sciences, 4700 King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Haroon Butt
- Laboratory for Genome Engineering and Synthetic Biology, Division of Biological Sciences, 4700 King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Magdy Mahfouz
- Laboratory for Genome Engineering and Synthetic Biology, Division of Biological Sciences, 4700 King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
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Zhou Z, Jiang Q, Qiu Z, Hou X, Yang X, Yang Y, Hao T, Guo D, Wang J, Li Y, Liu Q, Ling X, Zhang B. Differential Resistance to Acetyl-CoA Carboxylase Inhibitors in Rice: Insights from Two Distinct Target-Site Mutations. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:12029-12044. [PMID: 38752706 DOI: 10.1021/acs.jafc.4c01889] [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: 05/30/2024]
Abstract
Weeds present a significant challenge to agricultural productivity, and acetyl-CoA carboxylase (ACCase)-inhibiting herbicides have proven to be effective in managing weed populations in rice fields. To develop ACCase-inhibiting herbicide-resistant rice, we generated mutants of rice ACCase (OsACC) featuring Ile-1792-Leu or Gly-2107-Ser substitutions through ethyl methyl sulfonate (EMS) mutagenesis. The Ile-1792-Leu mutant displayed cross-resistance to aryloxyphenoxypropionate (APP) and phenylpyrazoline (DEN) herbicides, whereas the Gly-2107-Ser mutants primarily exhibited cross-resistance to APP herbicides with diminished resistance to the DEN herbicide. In vitro assays of the OsACC activity revealed an increase in resistance to haloxyfop and quizalofop, ranging from 4.84- to 29-fold in the mutants compared to that in wild-type. Structural modeling revealed that both mutations likely reduce the binding affinity between OsACC and ACCase inhibitors, thereby imparting resistance. This study offers insights into two target-site mutations, contributing to the breeding of herbicide-resistant rice and presenting alternative weed management strategies in rice cultivation.
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Affiliation(s)
- Zhenzhen Zhou
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
| | - Qun Jiang
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya Hainan 572025, China
| | - Zeyu Qiu
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
| | - Xiaodong Hou
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
| | - Xia Yang
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
| | - Yuwen Yang
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
| | - Tingting Hao
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
| | - Dongshu Guo
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
| | - Jinyan Wang
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
| | - Yongfeng Li
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
| | - Qing Liu
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
- College of Agriculture, Yangzhou University, Yangzhou Jiangsu 225009, China
| | - Xitie Ling
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
| | - Baolong Zhang
- Provincial Key Laboratory of Agrobiology and Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing Jiangsu 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing Jiangsu 210014, China
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya Hainan 572025, China
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González‐Torralva F, Norsworthy JK. Target-site mutations Ile1781Leu and Ile2041Asn in the ACCase2 gene confer resistance to fluazifop-p-butyl and pinoxaden herbicides in a johnsongrass accession from Arkansas, USA. PLANT DIRECT 2024; 8:e576. [PMID: 38516339 PMCID: PMC10955616 DOI: 10.1002/pld3.576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 02/18/2024] [Accepted: 02/22/2024] [Indexed: 03/23/2024]
Abstract
Johnsongrass [Sorghum halepense (L.) Pers.] is a troublesome weed species in different agricultural and non-agricultural areas. Because of its biology, reproductive system, and seed production, effective management is challenging. An accession with low susceptibility to the acetyl-CoA carboxylase (ACCase)-inhibiting herbicides fluazifop-p-butyl (fluazifop) and pinoxaden was collected in eastern Arkansas. In this research, the molecular mechanisms responsible for ACCase resistance were investigated. Dose-response experiments showed a resistance factor of 181 and 133 for fluazifop and pinoxaden, respectively. Molecular analysis of both ACCase1 and ACCase2 genes was researched. Nucleotide comparison of ACCase1 between resistant and susceptible accessions showed no single nucleotide polymorphisms. Nonetheless, analysis of ACCase2 in fluazifop-resistant johnsongrass plants revealed the Ile1781Leu target-site mutation was dominant (nearly 75%), whereas the majority of pinoxaden-resistant johnsongrass plants had the Ile2041Asn (60%). Not all sequenced johnsongrass plants displayed a target-site mutation, suggesting the presence of additional resistance mechanisms. Amplification of ACCase1 and ACCase2 was not responsible for resistance because of the similar values obtained in both resistant and susceptible accessions. Experiments with malathion and NBD-Cl suggest the presence of herbicide metabolism. Outcomes of this research demonstrated that fluazifop- and pinoxaden-resistant johnsongrass plants displayed a target-site mutation in ACCase2, but also that non-target-site resistance mechanisms would be involved and require a detailed study.
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Affiliation(s)
| | - Jason K. Norsworthy
- Department of Crop, Soil, and Environmental SciencesUniversity of ArkansasFayettevilleARUSA
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Brunharo CACG, Tranel PJ. Repeated evolution of herbicide resistance in Lolium multiflorum revealed by haplotype-resolved analysis of acetyl-CoA carboxylase. Evol Appl 2023; 16:1969-1981. [PMID: 38143902 PMCID: PMC10739073 DOI: 10.1111/eva.13615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 06/27/2023] [Accepted: 10/24/2023] [Indexed: 12/26/2023] Open
Abstract
Herbicide resistance in weeds is one of the greatest challenges in modern food production. The grass species Lolium multiflorum is an excellent model species to investigate evolution under similar selection pressure because populations have repeatedly evolved resistance to many herbicides, utilizing a multitude of mechanisms to neutralize herbicide damage. In this work, we investigated the gene that encodes acetyl-CoA carboxylase (ACCase), the target site of the most successful herbicide group available for grass weed control. We sampled L. multiflorum populations from agricultural fields with history of intense herbicide use, and studied their response to three ACCase-inhibiting herbicides. To elucidate the mechanisms of herbicide resistance and the genetic relationship among populations, we resolved the haplotypes of 97 resistant and susceptible individuals by sequencing ACCase amplicons using long-read DNA sequencing technologies. Our dose-response data indicated the existence of many, often unpredictable, resistance patterns to ACCase-inhibiting herbicides, where populations exhibited as much as 37-fold reduction in herbicide response. The majority of the populations exhibited resistance to all three herbicides studied. Phylogenetic and molecular genetic analyses revealed multiple evolutionary origins of resistance-endowing ACCase haplotypes, as well as widespread admixture in the region regardless of cropping system. The amplicons generated were diverse, with haplotypes exhibiting 26-110 polymorphisms. Polymorphisms included insertions and deletions 1-31 bp in length, none of which were associated with the resistance phenotype based on an association analysis. We also found evidence that some populations have multiple mechanisms of resistance. Our results highlight the astounding genetic diversity in L. multiflorum populations, and the potential for repeated evolution of herbicide resistance across the landscape that challenges weed management approaches and jeopardizes sustainable weed control practices. We provide an in-depth discussion of the evolutionary and practical implications of our results.
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Affiliation(s)
- Caio A. C. G. Brunharo
- Department of Plant ScienceThe Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA
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Deng W, Li Y, Yao S, Wu J, Zhu A, Yang Q, Yuan S. Current status of cyhalofop-butyl and metamifop resistance and diversity of the ACCase gene mutations in Chinese sprangletop (Leptochloa chinensis) from China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 197:105648. [PMID: 38072523 DOI: 10.1016/j.pestbp.2023.105648] [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: 08/22/2023] [Revised: 10/07/2023] [Accepted: 10/12/2023] [Indexed: 12/18/2023]
Abstract
Leptochloa chinensis populations in China have evolved widespread resistance to acetyl coenzyme A carboxylase (ACCase)-inhibiting herbicides cyhalofop-butyl (CyB) and metamifop (Met). 124 L. chinensis populations, randomly collected from rice fields in Jiangsu Province, were surveyed for CyB and Met resistance status, and all potential ACCase gene resistance-conferring mutations and effective pre-emergence herbicides for its control were investigated. Single-dose tests confirmed that 82 (66.1%) and 70 (56.4%) populations evolved resistance to CyB and Met, respectively. ACCase sequencing revealed that 56.4% of the populations contain plants with diverse target-site ACCase mutations (Ile1781Leu, Trp1999Cys, Trp2027Cys, Trp2027Ser, Ile2041Asn, Gly2096Ala, and in particular, a Leu1818Phe mutation). Notably, the Leu1818Phe mutation had been detected in 8 resistant populations, indicating this mutation was prone to occur in L. chinensis. Additionally, 9.7% of the populations may have single metabolic resistance to CyB, as these populations was susceptible to Met, and no any ACCase mutations were found. Moreover, the resistant populations with different ACCase mutations showed 6.5 to 33.6-fold resistance to CyB, and 4.4 to 82.6-fold resistance to Met. Importantly, five pre-emergence herbicides, including pretilachlor, pendimethalin, clomazone, pyraclonil, and mefenacet, all exhibited good control effect on resistant L. chinensis populations. This work confirmed the prevalence and distribution of CyB and Met resistance in L. chinensis. Target-site ACCase mutations made a major contribution to CyB and Met resistance. Pre-emergence herbicides could be valuable tools for management of resistant L. chinensis populations.
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Affiliation(s)
- Wei Deng
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Yang Li
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Sai Yao
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Jiawen Wu
- Plant Protection and Quarantine Station of Jiangsu province, Nanjing, China
| | - Axiu Zhu
- Plant Protection and Quarantine Station of Jiangsu province, Nanjing, China
| | - Qian Yang
- Jiangsu Lixiahe District Institute of Agricultural Sciences, Yangzhou, China
| | - Shuzhong Yuan
- College of Plant Protection, Yangzhou University, Yangzhou, China.
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Deng W, Li Y, Yao S, Duan Z, Yang Q, Yuan S. ACCase gene mutations and P450-mediated metabolism contribute to cyhalofop-butyl resistance in Eleusine indica biotypes from direct-seeding paddy fields. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 194:105530. [PMID: 37532339 DOI: 10.1016/j.pestbp.2023.105530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/09/2023] [Accepted: 07/10/2023] [Indexed: 08/04/2023]
Abstract
Eleusine indica causes problems in direct-seeding rice fields across Jiangsu Province in China. Long-term application of chemical herbicides has led to the widespread evolution of resistance in E. indica. In this study, we surveyed the resistance level of cyhalofop-butyl (CyB) in 19 field-collected E. indica biotypes, and characterized its underlying resistance mechanisms. All 19 biotypes evolved moderate- to high-level resistance to CyB (from 5.8- to 171.1-fold). 18 biotypes had a target-site mechanism with Trp-1999-Ser, Trp-2027-Cys, or Asp-2078-Gly mutations, respectively. One biotype (JSSQ-1) was identified to have metabolic resistance, in which malathion pretreatment significantly reduced the CyB resistance, and cyhalofop acid was degraded 1.7- to 2.5-times faster in this biotype compared with a susceptible control. Furthermore, the JSSQ-1 biotype showed multiple resistance to acetyl-CoA carboxylase (ACCase) inhibitor metamifop (RI = 4.6) and fenoxaprop-p-ethyl (RI = 5.1), acetolactate synthase (ALS) inhibitor imazethapyr (RI = 4.1), and hydroxyphenylpyruvate dioxygenase (HPPD) inhibitor mesotrione (RI = 3.5). In addition, 11 out of 19 E. indica biotypes exhibited multiple resistance to glyphosate. This research has identified the widespread occurrence of CyB resistance in E. indica, attributed to target-site mutations or enhanced metabolism. Moreover, certain biotypes have exhibited resistance to multiple herbicides or even cross-resistance. Consequently, there is an urgent need to implement diverse weed management practices to effectively combat the proliferation of this weed in rice fields.
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Affiliation(s)
- Wei Deng
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Yang Li
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Sai Yao
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Zhiwen Duan
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Qian Yang
- Jiangsu Lixiahe District Institute of Agricultural Sciences, Yangzhou, China
| | - Shuzhong Yuan
- College of Plant Protection, Yangzhou University, Yangzhou, China.
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Kersten S, Rabanal FA, Herrmann J, Hess M, Kronenberg ZN, Schmid K, Weigel D. Deep haplotype analyses of target-site resistance locus ACCase in blackgrass enabled by pool-based amplicon sequencing. PLANT BIOTECHNOLOGY JOURNAL 2023; 21:1240-1253. [PMID: 36807472 PMCID: PMC10214753 DOI: 10.1111/pbi.14033] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 12/27/2022] [Accepted: 02/06/2023] [Indexed: 05/27/2023]
Abstract
Rapid adaptation of weeds to herbicide applications in agriculture through resistance development is a widespread phenomenon. In particular, the grass Alopecurus myosuroides is an extremely problematic weed in cereal crops with the potential to manifest resistance in only a few generations. Target-site resistances (TSRs), with their strong phenotypic response, play an important role in this rapid adaptive response. Recently, using PacBio's long-read amplicon sequencing technology in hundreds of individuals, we were able to decipher the genomic context in which TSR mutations occur. However, sequencing individual amplicons are costly and time-consuming, thus impractical to implement for other resistance loci or applications. Alternatively, pool-based approaches overcome these limitations and provide reliable allele frequencies, although at the expense of not preserving haplotype information. In this proof-of-concept study, we sequenced with PacBio High Fidelity (HiFi) reads long-range amplicons (13.2 kb), encompassing the entire ACCase gene in pools of over 100 individuals, and resolved them into haplotypes using the clustering algorithm PacBio amplicon analysis (pbaa), a new application for pools in plants and other organisms. From these amplicon pools, we were able to recover most haplotypes from previously sequenced individuals of the same population. In addition, we analysed new pools from a Germany-wide collection of A. myosuroides populations and found that TSR mutations originating from soft sweeps of independent origin were common. Forward-in-time simulations indicate that TSR haplotypes will persist for decades even at relatively low frequencies and without selection, highlighting the importance of accurate measurement of TSR haplotype prevalence for weed management.
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Affiliation(s)
- Sonja Kersten
- Institute of Plant Breeding, Seed Science and Population GeneticsUniversity of HohenheimStuttgartGermany
- Department of Molecular BiologyMax Planck Institute for Biology TübingenTübingenGermany
| | - Fernando A. Rabanal
- Department of Molecular BiologyMax Planck Institute for Biology TübingenTübingenGermany
| | | | | | | | - Karl Schmid
- Institute of Plant Breeding, Seed Science and Population GeneticsUniversity of HohenheimStuttgartGermany
| | - Detlef Weigel
- Department of Molecular BiologyMax Planck Institute for Biology TübingenTübingenGermany
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Hwang JI, Norsworthy JK, McElroy JS, Rutland CA, Barber LT, Butts TR. Metabolic Exploration for Cyhalofop-Butyl Antagonism in Barnyardgrass [ Echinochloa crus-galli (L.) P. Beauv.] Following Pretreatment of Malathion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:6617-6625. [PMID: 37094573 DOI: 10.1021/acs.jafc.3c00735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The present study investigated the effects of broad-spectrum metabolic inhibitors malathion (cytochrome P450 inhibitor) and/or 4-chloro-7-nitrobenzofurazan (NBD-Cl; glutathione S-transferase inhibitor) on the metabolism of cyhalofop-butyl (CyB) in barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] biotypes confirmed previously with multiple resistance to two herbicides CyB and florpyrauxifen-benzyl. The metabolic inhibitors were not effective at recovering the sensitivity of resistant barnyardgrass biotypes to CyB treated at the labeled rate (313 g ai ha-1). Rather, treatment with malathion followed by CyB caused antagonism, reducing the efficacy of CyB and promoting the growth of resistant biotypes. Pretreatment with malathion did not influence absorption/translocation of the applied form CyB and its conversion to the active herbicide form cyhalofop-acid (CyA), in both susceptible and resistant biotypes. In contrast, metabolism of the applied form (CyB) decreased 1.5 to 10.5 times by the malathion pretreatment. Taken together, the maintained CyA production against the reduced CyB metabolism could be the mechanism to account for the cause of CyB antagonism observed in barnyardgrass following malathion pretreatment. Additionally, the evolution of CyB resistance in barnyardgrass might be associated with reduced production of CyA in resistant biotypes, independent of activities of cytochrome P450 or GST enzymes.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72704, United States
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72704, United States
| | - J Scott McElroy
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, Alabama 36831, United States
| | - Claudia Ann Rutland
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, Alabama 36831, United States
| | - L Tom Barber
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72704, United States
| | - Thomas R Butts
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas 72704, United States
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Cao J, Tao Y, Zhang Z, Gu T, Li G, Lou Y, Wang H. Mechanism of metamifop resistance in Digitaria ciliaris var. chrysoblephara from Jiangsu, China. FRONTIERS IN PLANT SCIENCE 2023; 14:1133798. [PMID: 36895875 PMCID: PMC9989310 DOI: 10.3389/fpls.2023.1133798] [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: 12/29/2022] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Digitaria ciliaris var. chrysoblephara is one of the most competitive and problematic grass weeds in China. Metamifop is an aryloxyphenoxypropionate (APP) herbicide that inhibits the activity of acetyl-CoA carboxylase (ACCase) of sensitive weeds. Following the introduction of metamifop to China in 2010, it has been continuously used in rice paddy fields, thereby substantially increasing selective pressure for resistant D. ciliaris var. chrysoblephara variants. Here, populations of D. ciliaris var. chrysoblephara (JYX-8, JTX-98, and JTX-99) were observed to be highly resistant to metamifop, with resistance index (RI) values of 30.64, 14.38, and 23.19, respectively. Comparison of resistant and sensitive population ACCase gene sequences revealed that a single nucleotide substitution from TGG to TGC resulted in an amino acid substitution from tryptophan to cysteine at position 2,027 in the JYX-8 population. No corresponding substitution was observed for JTX-98 and JTX-99 populations. The ACCase cDNA of D. ciliaris var. chrysoblephara was successfully obtained by PCR and RACE methods, representing the first amplification of full length ACCase cDNA from Digitaria spp. Investigation of the relative expressions of ACCase gene revealed the lack of significant differences between sensitive and resistant populations before and after herbicide treatments. ACCase activities in resistant populations were less inhibited than in sensitive populations and recovered to the same or even higher levels compared to untreated plants. Whole-plant bioassays were also conducted to assess resistance to other ACCase inhibitors, acetolactate synthase (ALS) inhibitors, auxin mimic herbicide, and protoporphyrinogen oxidase (PPO) inhibitor. Cross-resistance and some multi-resistance were observed in the metamifop-resistant populations. This study is the first to focus on the herbicide resistance of D. ciliaris var. chrysoblephara. These results provide evidence for a target-site resistance mechanism in metamifop-resistant D. ciliaris var. chrysoblephara, while providing a better understanding of cross- and multi-resistance characteristics of resistant populations that will help in the management of herbicide-resistant D. ciliaris var. chrysoblephara.
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Panozzo S, Farinati S, Sattin M, Scarabel L. Can allele-specific loop-mediated isothermal amplification be used for rapid detection of target-site herbicide resistance in Lolium spp.? PLANT METHODS 2023; 19:14. [PMID: 36750938 PMCID: PMC9906911 DOI: 10.1186/s13007-023-00989-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Herbicide resistance is one of the threats to modern agriculture and its early detection is one of the most effective components for sustainable resistance management strategies. Many techniques have been used for target-site-resistance detection. Allele-Specific Loop-Mediated Isothermal Amplification (AS-LAMP) was evaluated as a possible rapid diagnostic method for acetyl-CoA carboxylase (ACCase) and acetolactate synthase (ALS) inhibiting herbicides resistance in Lolium spp. RESULTS AS-LAMP protocols were set up for the most frequent mutations responsible for herbicide resistance to ALS (positions 197, 376 and 574) and ACCase (positions 1781, 2041 and 2078) inhibitors in previously characterized and genotyped Lolium spp. POPULATIONS A validation step on new putative resistant populations gave the overview of a possible use of this tool for herbicide resistance diagnosis in Lolium spp. Regarding the ACCase inhibitor pinoxaden, in more than 65% of the analysed plants, the LAMP assay and genotyping were in keeping, whereas the results were not consistent when ALS inhibitors resistance was considered. Limitations on the use of this technique for herbicide resistance detection in the allogamous Lolium spp. are discussed. CONCLUSIONS The LAMP method used for the detection of target-site resistance in weed species could be applicable with target genes that do not have high genetic variability, such as ACCase gene in Lolium spp.
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Affiliation(s)
- Silvia Panozzo
- Institute for Sustainable Plant Protection (IPSP) - National Research Council (CNR), viale dell'Università 16, 35020, Legnaro, PD, Italy.
| | - Silvia Farinati
- Department of Agronomy, Food, Natural Resources, Animals and Environment (DAFNAE), University of Padova, Padova, Italy
| | - Maurizio Sattin
- Institute for Sustainable Plant Protection (IPSP) - National Research Council (CNR), viale dell'Università 16, 35020, Legnaro, PD, Italy
| | - Laura Scarabel
- Institute for Sustainable Plant Protection (IPSP) - National Research Council (CNR), viale dell'Università 16, 35020, Legnaro, PD, Italy
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Rajak BK, Rani P, Singh N, Singh DV. Sequence and structural similarities of ACCase protein of Phalaris minor and wheat: An insight to explain herbicide selectivity. FRONTIERS IN PLANT SCIENCE 2023; 13:1056474. [PMID: 36684777 PMCID: PMC9845919 DOI: 10.3389/fpls.2022.1056474] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
Uncontrolled growth of Phalaris minor in the wheat (Triticum aestivum) crop has remained a problem, leading to a massive reduction in wheat grain production. Herbicides have been used to control the weed, which leads to the development of frequent resistance in P. minor and mutant biotypes were also reported (Trp2027Cys and Ile2041Asn). Development of resistance enforced agro researchers to analyses the action of herbicide on P. minor. In this study, the sequence and structure of P. minor and T. aestivum Acetyl CoA Carboxylase (ACCase) have been analysed to locate the differences in their sequence and structure and to formulate a plausible explanation of the selectivity of herbicides which may help in the rationale discovery of noble herbicides. The sequence and 3D structure analysis of weed and wheat ACCase indicate minute differences in the distantly located amino acid residues. However, proteins are conserved at the binding site of herbicides with no mutation at the catalytic site. Analysis indicates that herbicides selectively target P. minor ACCase might be due to unknown other reasons, but not due to differences in their protein sequence and structure.
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Affiliation(s)
- Bikash Kumar Rajak
- Molecular Modelling and Computer Aided Drug Discovery Laboratory, Department of Bioinformatics, School of Earth, Biological and Environmental Sciences, Central University of South Bihar Gaya, Gaya, Bihar, India
| | - Priyanka Rani
- Molecular Modelling and Computer Aided Drug Discovery Laboratory, Department of Bioinformatics, School of Earth, Biological and Environmental Sciences, Central University of South Bihar Gaya, Gaya, Bihar, India
| | - Nitesh Singh
- Department of Biosciences, University institute of Biotechnology, Chandigarh University, Mohali, Punjab, India
| | - Durg Vijay Singh
- Molecular Modelling and Computer Aided Drug Discovery Laboratory, Department of Bioinformatics, School of Earth, Biological and Environmental Sciences, Central University of South Bihar Gaya, Gaya, Bihar, India
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12
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First Asp-2078-Gly Mutation Conferring Resistance to Different ACCase Inhibitors in a Polypogon fugax Population from China. Int J Mol Sci 2022; 24:ijms24010528. [PMID: 36613971 PMCID: PMC9820770 DOI: 10.3390/ijms24010528] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/18/2022] [Accepted: 12/19/2022] [Indexed: 12/30/2022] Open
Abstract
Asia minor bluegrass (Polypogon fugax) is a common and problematic weed throughout China. P. fugax that is often controlled by acetyl-CoA carboxylase (ACCase) inhibitors in canola fields. Herein, we confirmed a P. fugax population (R) showing resistance to all ACCase inhibitors tested with resistance indexes ranging from 5.4-18.4. We further investigated the resistance mechanisms of this R population. Molecular analyses revealed that an amino acid mutation (Asp-2078-Gly) was present in the R population by comparing ACCase gene sequences of the sensitive population (S). In addition, differences in susceptibility between the R and S population were unlikely to be related to herbicide metabolism. Furthermore, a new derived cleaved amplified polymorphic sequence (dCAPS) method was developed for detecting the Asp-2078-Gly mutation in P. fugax efficiently. We found that 93.75% of plants in the R population carried the Asp-2078-Gly mutation, and all the herbicide-resistant phenotype of this R population is inseparable from this mutation. This is the first report of cross resistance to ACCase inhibitors conferred by the Asp-2078-Gly target-site mutation in P. fugax. The research suggested the urgent need to improve the diversity of weed management practices to prevent the widespread evolution of herbicide resistance in P. fugax in China.
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13
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Vázquez-García JG, de Portugal J, Torra J, Osuna MD, Palma-Bautista C, Cruz-Hipólito HE, De Prado R. Comparison between the mechanisms of Clearfield ® wheat and Lolium rigidum multiple resistant to acetyl CoA carboxylase and acetolactate synthase inhibitors. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 306:119438. [PMID: 35561797 DOI: 10.1016/j.envpol.2022.119438] [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: 10/24/2021] [Revised: 04/28/2022] [Accepted: 05/05/2022] [Indexed: 06/15/2023]
Abstract
Clearfield® wheat (Triticum aestivum) have helped eliminate the toughest grasses and broadleaf weeds in Spain since 2005. This crop production system includes other tolerant cultivars to the application of imidazolinone (IMI) herbicides. However, the continuous use and off-label rates of IMI herbicides can contribute to the development of resistance in Lolium rigidum and other weed species. In this research, the main objectives were to study the resistance mechanisms to acetolactate synthase (ALS) and acetyl coenzyme A carboxylase (ACCase) inhibitors in a L. rigidum accession (LrR) from a Clearfield® wheat field, with a long history rotating these IMI-tolerant crops and compare them with those present in the IMI-tolerant wheat. The resistance to ACCase inhibitors in LrR was due to point mutations (Ile1781Leu plus Asp2078Gly) of the target site gene plus an enhanced herbicide metabolism (EHM), on the other hand, in wheat accessions was due only by EHM. Mechanisms involved in the resistance to ALS inhibitors were both point mutations of the target gene and EHM in the IMI-tolerant wheat, while only evidence of mutation (Trp574Leu) was found in the multiple herbicide resistant L. rigidum accession. This research demonstrates that if crop rotation is not accompanied by the use of alternative sites of action in herbicide-tolerant crops, resistant weeds to herbicide to which crops are tolerant, can easily be selected. Moreover, repeated and inappropriate use of Clearfield® crops and herbicide rotations can lead to the evolution of multiple resistant weeds, as shown in this study, and have also inestimable environmental impacts.
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Affiliation(s)
- José G Vázquez-García
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 14014, Córdoba, Spain.
| | - Joao de Portugal
- Biosciences Department, Polytechnic Institute of Beja, Beja, Portugal; VALORIZA-Research Centre for Endogenous Resource Valorization, Polytechnic Institute of Portalegre, Portalegre, Portugal
| | - Joel Torra
- Department d'Hortofructicultura, Botànica i Jardineria, Agrotecnio-CERCA Center, Universitat de Lleida, Lleida, Spain
| | - Maria D Osuna
- Plant Protection Department, Extremadura Scientific and Technological Research Center (CICYTEX), Ctra. de AV, km 372, Badajoz, 06187, Guadajira, Spain
| | - Candelario Palma-Bautista
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 14014, Córdoba, Spain
| | | | - Rafael De Prado
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 14014, Córdoba, Spain
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14
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Hwang JI, Norsworthy JK, González-Torralva F, Piveta LB, Barber LT, Butts TR. Cross-resistance of barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] to aryloxyphenoxypropionate herbicides. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 184:105089. [PMID: 35715035 DOI: 10.1016/j.pestbp.2022.105089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/02/2022] [Accepted: 04/03/2022] [Indexed: 06/15/2023]
Abstract
Managing emerged weeds that have evolved resistance to acetyl CoA carboxylase (ACCase)-inhibiting herbicides is a challenging task. A dose-response experiment was conducted on barnyardgrass biotypes resistant (R) and susceptible (S) to three aryloxyphenoxypropionate herbicides cyhalofop-butyl (CyB), fenoxaprop-ethyl (FeE), and quizalofop-ethyl (QuE) along with investigations into the potential resistance mechanism of these biotypes. The tested R barnyardgrass biotypes had strong resistance to CyB and FeE (resistant/susceptible ratio: 7.9-14.4) but weak resistance to QuE (resistant/susceptible ratio: 2.4-3.1). Absorption, translocation, and total metabolism of CyB and QuE were not associated with differences among S and R barnyardgrass biotypes. However, differences between S and R barnyardgrass were observed in production of active acid forms of each herbicide (cyhalofop-acid and quizalofop-acid). Production of cyhalofop-acid was >1.6-fold less in R barnyardgrass (3-8%) for 24 h after herbicide application than in the S barnyardgrass (8-16%). Meanwhile, production of quizalofop-acid was less in R barnyardgrass (< 14%) throughout the study period than in the S barnyardgrass (< 22%). Sequencing results of ACCase gene showed no difference between S and R barnyardgrass. Overall results show that a non-target-site resistance mechanism altering metabolism of CyB and QuE likely contributes to resistance of the barnyardgrass biotypes to these herbicides.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA.
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Fidel González-Torralva
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Leonard B Piveta
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - L Tom Barber
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Thomas R Butts
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
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15
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Ghanizadeh H, Buddenhagen CE, Harrington KC, Griffiths AG, Ngow Z. Pinoxaden resistance in Lolium perenne L. is due to both target-site and non-target-site mechanisms. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 184:105103. [PMID: 35715042 DOI: 10.1016/j.pestbp.2022.105103] [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: 02/21/2022] [Revised: 03/30/2022] [Accepted: 04/15/2022] [Indexed: 06/15/2023]
Abstract
Application of herbicides inhibiting acetyl CoA carboxylase (ACCase) has been one of the main strategies for selectively controlling grass weed species such as perennial ryegrass (Lolium perenne L.) in wheat and barley crops in New Zealand. In this study, we have confirmed and characterized resistance to pinoxaden, an ACCase-inhibiting herbicide, in a population of L. perenne. Dose-response experiments were conducted to assess the level of pinoxaden resistance, and based on the LD50 values, the studied population was 41.4-times more resistant to pinoxaden than a susceptible population. Application of malathion, an inhibitor of the cytochrome P450s, preceding pinoxaden treatment reduced the level of resistance to 9.7-fold. However, pre-treatment with the glutathione S-transferase (GST) inhibitor 4-chloro7- nitrobenzoxadiazole prior to pinoxaden treatment did not affect pinoxaden resistance. Partial sequencing of the ACCase gene revealed that the resistant population had an isoleucine to valine replacement at position 2041. These results suggest that both cytochrome P450-based and target-site mechanisms are jointly associated with this instance of pinoxaden resistance in L. perenne. The pinoxaden-resistant L. perenne individuals were also resistant to quizalofop-p-ethyl (108.6-fold), but they were susceptible to clethodim, which can, therefore, be used to manage this pinoxaden-resistant L. perenne. This is the first report of a L. perenne population in which a rare target-site mutation works in concert with enhanced cytochrome P-450 activity to confer pinoxaden resistance. Evolution of resistance to ACCase-inhibiting herbicides in this L. perenne population indicates that integrated weed management practices are required to prevent widespread resistance developing in New Zealand cereal crop systems.
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Affiliation(s)
- Hossein Ghanizadeh
- School of Agriculture and Environment, Massey University, Palmerston North, New Zealand.
| | | | - Kerry C Harrington
- School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
| | - Andrew G Griffiths
- AgResearch Grasslands Research Centre, Palmerston North 4442, New Zealand
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16
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Hwang JI, Norsworthy JK, González-Torralva F, Piveta LB, Priess GL, Barber LT, Butts TR. Absorption, translocation, and metabolism of florpyrauxifen-benzyl and cyhalofop-butyl in cyhalofop-butyl-resistant barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.]. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 180:104999. [PMID: 34955183 DOI: 10.1016/j.pestbp.2021.104999] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/08/2021] [Accepted: 11/18/2021] [Indexed: 06/14/2023]
Abstract
Dose-response experiments were conducted to assess the sensitivity of one susceptible and three putative resistant (R1, R2, and R3) barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] biotypes to florpyrauxifen-benzyl and cyhalofop-butyl alone and as a formulated premix. Subsequently, potential resistance mechanisms of the barnyardgrass were evaluated. Based on biomass reduction results, resistant/susceptible ratios were calculated for R1 (7.0-50), R2 (7.0-150), and R3 (18-214) biotypes. Absorption and translocation of [14C]-florpyrauxifen-benzyl decreased in R1 and R3 biotypes, but not for [14C]-cyhalofop-butyl. The metabolism of [14C]-florpyrauxifen-benzyl to [14C]-florpyrauxifen-acid was >2-fold less in resistant biotypes (9-11%) than in the susceptible biotype (23%). Moreover, the production of [14C]-florpyrauxifen-acid in susceptible barnyardgrass (not in the R biotypes) increased 3-fold when florpyrauxifen-benzyl and cyhalofop-butyl were applied in mixture compared to florpyrauxifen-benzyl applied alone. The tested barnyardgrass biotypes had no mutation in the Transport Inhibitor Response1, auxin-signaling F-box, and acetyl coenzyme A carboxylase genes. Although further studies on cyhalofop-butyl resistance with respect to analysis of specific metabolites are needed, our findings in this study demonstrates that the evolution of florpyrauxifen-benzyl resistance in multiple resistant barnyardgrass can be related to non-target-site resistance mechanisms reducing absorption and translocation of the herbicide and causing reduced conversion or rapid degradation of florpyrauxifen-acid.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA.
| | - Jason K Norsworthy
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Fidel González-Torralva
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Leonard B Piveta
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Grant L Priess
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - L Tom Barber
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
| | - Thomas R Butts
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704, USA
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17
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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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18
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Benakashani F, Gonzalez-Andujar JL, Soltani E. Differences in Germination of ACCase-Resistant Biotypes Containing Isoleucine-1781-Leucine Mutation and Susceptible Biotypes of Wild Oat (Avena sterilis ssp. ludoviciana). PLANTS 2021; 10:plants10112350. [PMID: 34834713 PMCID: PMC8620882 DOI: 10.3390/plants10112350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/22/2021] [Accepted: 10/27/2021] [Indexed: 11/17/2022]
Abstract
Herbicide resistance can affect seed germination and the optimal conditions required for seed germination, which in turn may impose a fitness cost in resistant populations. Winter wild oat [Avena sterilis L. ssp. ludoviciana (Durieu) Gillet and Magne] is a serious weed in cereal fields. In this study, the molecular basis of resistance to an ACCase herbicide, clodinafop-propargyl, in four A. ludoviciana biotypes was assessed. Germination differences between susceptible (S) and ACCase-resistant biotypes (WR1, WR2, WR3, WR4) and the effect of Isoleucine-1781-Leucine mutation on germination were also investigated through germination models. The results indicated that WR1 and WR4 were very highly resistant (RI > 214.22) to clodinafop-propargyl-contained Isoleucine to Leucine amino acid substitution. However, Isoleucine-1781-Leucine mutation was not detected in other very highly resistant biotypes. Germination studies indicated that resistant biotypes (in particular WR1 and WR4) had higher base water potentials than the susceptible one. This shows that resistant biotypes need more soil water to initiate their germination. However, the hydrotime constant for germination was higher in resistant biotypes than in the susceptible one in most cases, showing faster germination in susceptible biotypes. ACCase-resistant biotypes containing the Isoleucine-1781-Leucine mutation had lower seed weight but used more seed reserve to produce seedlings. Hence, integrated management practices such as stale seedbed and implementing it at the right time could be used to take advantage of the differential soil water requirement and relatively late germination characteristics of ACCase-resistant biotypes.
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Affiliation(s)
- Fatemeh Benakashani
- Department of Agronomy and Plant Breeding Sciences, College of Aburaihan, University of Tehran, Pakdasht 3391653755, Iran; (F.B.); (E.S.)
| | - Jose L. Gonzalez-Andujar
- Department of Crop Protection, Instituto de Agricultura Sostenible (CSIC), 14004 Córdoba, Spain
- Correspondence:
| | - Elias Soltani
- Department of Agronomy and Plant Breeding Sciences, College of Aburaihan, University of Tehran, Pakdasht 3391653755, Iran; (F.B.); (E.S.)
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19
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ARTP Mutagenesis of Schizochytrium sp. PKU#Mn4 and Clethodim-Based Mutant Screening for Enhanced Docosahexaenoic Acid Accumulation. Mar Drugs 2021; 19:md19100564. [PMID: 34677463 PMCID: PMC8539320 DOI: 10.3390/md19100564] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 09/29/2021] [Accepted: 10/04/2021] [Indexed: 11/16/2022] Open
Abstract
Schizochytrium species are one of the best oleaginous thraustochytrids for high-yield production of docosahexaenoic acid (DHA, 22:6). However, the DHA yields from most wild-type (WT) strains of Schizochytrium are unsatisfactory for large-scale production. In this study, we applied the atmospheric and room-temperature plasma (ARTP) tool to obtain the mutant library of a previously isolated strain of Schizochytrium (i.e., PKU#Mn4). Two rounds of ARTP mutagenesis coupled with the acetyl-CoA carboxylase (ACCase) inhibitor (clethodim)-based screening yielded the mutant A78 that not only displayed better growth, glucose uptake and ACCase activity, but also increased (54.1%) DHA content than that of the WT strain. Subsequent optimization of medium components and supplementation improved the DHA content by 75.5 and 37.2%, respectively, compared with that of mutant A78 cultivated in the unoptimized medium. Interestingly, the ACCase activity of mutant A78 in a medium supplemented with biotin, citric acid or sodium citrate was significantly greater than that in a medium without supplementation. This study provides an effective bioengineering approach for improving the DHA accumulation in oleaginous microbes.
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20
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Rapid On-Farm Testing of Resistance in Lolium rigidum to Key Pre- and Post-Emergence Herbicides. PLANTS 2021; 10:plants10091879. [PMID: 34579410 PMCID: PMC8467281 DOI: 10.3390/plants10091879] [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: 08/10/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 11/28/2022]
Abstract
Overreliance on herbicides for weed control is conducive to the evolution of herbicide resistance. Lolium rigidum (annual ryegrass) is a species that is prone to evolve resistance to a wide range of herbicide modes of action. Rapid detection of herbicide-resistant weed populations in the field can aid farmers to optimize the use of effective herbicides for their control. The feasibility and utility of a rapid 7-d agar-based assay to reliably detect L. rigidum resistant to key pre- and post-emergence herbicides including clethodim, glyphosate, pyroxasulfone and trifluralin were investigated in three phases: correlation with traditional pot-based dose-response assays, effect of seed dormancy, and stability of herbicides in agar. Easy-to-interpret results were obtained using non-dormant seeds from susceptible and resistant populations, and resistance was detected similarly as pot-based assays. However, the test is not suitable for trifluralin because of instability in agar as measured over a 10-d period, as well as freshly-harvested seeds due to primary dormancy. This study demonstrates the utility of a portable and rapid assay that allows for on-farm testing of clethodim, glyphosate, and pyroxasulfone resistance in L. rigidum, thereby aiding the identification and implementation of effective herbicide control options.
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21
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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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22
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Ghanizadeh H, Li F, He L, Harrington KC. Characterization of clopyralid resistance in lawn burweed (Soliva sessilis). PLoS One 2021; 16:e0253934. [PMID: 34191837 PMCID: PMC8244908 DOI: 10.1371/journal.pone.0253934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 06/15/2021] [Indexed: 11/23/2022] Open
Abstract
Soliva sessilis is a troublesome annual weed species in New Zealand turfgrass. This weed has been controlled selectively in New Zealand turfgrass for many years using pyridine herbicides such as clopyralid. However, in some golf courses, the continuous application of pyridine herbicides has resulted in the selection of S. sessilis populations that are resistant to these herbicides. This study focuses on a clopyralid-resistant population of S. sessilis collected from a golf course with a long history of clopyralid applications. The resistant phenotype of S. sessilis was highly resistant to clopyralid (over 225-fold). It was also cross-resistant to dicamba, MCPA and picloram but not mecoprop. The level of resistance to dicamba was high (7-14-fold) but much lower (2-3-fold) for both MCPA and picloram. The phenotype was morphologically distinct from its susceptible counterpart. Individuals of the clopyralid-resistant phenotype had fewer lobes on their leaves and were slightly larger compared to the susceptible phenotype. Resistant individuals also had a larger leaf area and greater root dry weight than the susceptible plants. An evaluation of internal transcribed spacer (ITS) regions confirmed that clopyralid-resistant phenotypes are conspecific with S. sessilis. In summary, the cross-resistance to several auxinic herbicides in this S. sessilis phenotype greatly reduces chemical options for controlling it; thus, other integrated management practices may be needed such as using turfgrass competition to reduce weed germination. However, the morphological differences between resistant and susceptible plants make it easy to see, which will help with its management.
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Affiliation(s)
- Hossein Ghanizadeh
- School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
- * E-mail:
| | - Fengshuo Li
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, China
| | - Lulu He
- School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
| | - Kerry C. Harrington
- School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
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Deng W, Yang M, Li Y, Xia Z, Chen Y, Yuan S, Yang Q. Enhanced metabolism confers a high level of cyhalofop-butyl resistance in a Chinese sprangletop (Leptochloa chinensis (L.) Nees) population. PEST MANAGEMENT SCIENCE 2021; 77:2576-2583. [PMID: 33497007 DOI: 10.1002/ps.6297] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 01/19/2021] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Chinese sprangletop (Leptochloa chinensis (L.) Nees) is one of main grass weeds invading Chinese rice fields. The target-site resistance (TSR) of cyhalofop-butyl have been widely reported in L. chinensis populations, but the non-target-site resistance (NTSR) mechanisms have not yet been well-characterized. This study aims to investigate the likely NTSR in a cyhalofop-butyl-resistant L. chinensis population (YZ-R), which was collected from Yangzhou city, Jiangsu Province, China. RESULTS Dose-response assays showed the YZ-R population exhibited 191.6-fold resistance to cyhalofop-butyl, compared to the susceptible population (YZ-S). This resistance is not target-site based, because no mutations in the two ACCase genes were detected in the YZ-R plants compared to the YZ-S plants, and the ACCase genes expression levels were similar in YZ-S and YZ-R plants. In addition, the cytochrome P450 inhibitor malathion and piperonyl butoxide (PBO), and glutathione S-transferase (GST) inhibitor 4-chloro-7-nitrobenzoxadiazole (NBD-Cl) did not significantly reverse cyhalofop-butyl resistance in the YZ-R population. However, liquid chromatography-mass spectrometry (LC-MS) analysis indicated that the metabolic rates of cyhalofop acid in YZ-R plants was significantly faster (5 to 10- fold) than in YZ-S plants. Furthermore, the YZ-R population showed no cross-resistance to other ACCase-inhibiting herbicides. CONCLUSION These results indicated that cyhalofop-butyl resistance in the YZ-R population is due to non-target-site based enhanced herbicide metabolism. Resistance in this population is likely involved in a specific detoxification enzyme, with possible high catalytic efficiency and strong substrate specificity, therefore leading to high-level and single resistance to cyhalofop-butyl. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Wei Deng
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Mengting Yang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Yang Li
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Zhiming Xia
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Yongrui Chen
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Shuzhong Yuan
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Qian Yang
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China
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Torra J, Montull JM, Taberner A, Onkokesung N, Boonham N, Edwards R. Target-Site and Non-target-Site Resistance Mechanisms Confer Multiple and Cross- Resistance to ALS and ACCase Inhibiting Herbicides in Lolium rigidum From Spain. FRONTIERS IN PLANT SCIENCE 2021; 12:625138. [PMID: 33613607 PMCID: PMC7889805 DOI: 10.3389/fpls.2021.625138] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 01/13/2021] [Indexed: 05/07/2023]
Abstract
Lolium rigidum is one the worst herbicide resistant (HR) weeds worldwide due to its proneness to evolve multiple and cross resistance to several sites of action (SoA). In winter cereals crops in Spain, resistance to acetolactate synthase (ALS)- and acetyl-CoA carboxylase (ACCase)-inhibiting herbicides has become widespread, with farmers having to rely on pre-emergence herbicides over the last two decades to maintain weed control. Recently, lack of control with very long-chain fatty acid synthesis (VLCFAS)-inhibiting herbicides has been reported in HR populations that are difficult to manage by chemical means. In this study, three Spanish populations of L. rigidum from winter cereals were confirmed as being resistant to ALS- and ACCase-inhibiting herbicides, with broad-ranging resistance toward the different chemistries tested. In addition, reduced sensitivity to photosystem II-, VLCFAS-, and phytoene desaturase-inhibiting herbicides were confirmed across the three populations. Resistance to ACCase-inhibiting herbicides was associated with point mutations in positions Trp-2027 and Asp-2078 of the enzyme conferring target site resistance (TSR), while none were detected in the ALS enzyme. Additionally, HR populations contained enhanced amounts of an ortholog of the glutathione transferase phi (F) class 1 (GSTF1) protein, a functional biomarker of non-target-site resistance (NTSR), as confirmed by enzyme-linked immunosorbent assays. Further evidence of NTSR was obtained in dose-response experiments with prosulfocarb applied post-emergence, following pre-treatment with the cytochrome P450 monooxygenase inhibitor malathion, which partially reversed resistance. This study confirms the evolution of multiple and cross resistance to ALS- and ACCase inhibiting herbicides in L. rigidum from Spain by mechanisms consistent with the presence of both TSR and NTSR. Moreover, the results suggest that NTSR, probably by means of enhanced metabolism involving more than one detoxifying enzyme family, confers cross resistance to other SoA. The study further demonstrates the urgent need to monitor and prevent the further evolution of herbicide resistance in L. rigidum in Mediterranean areas.
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Affiliation(s)
- Joel Torra
- Department d’Hortofructicultura, Botànica i Jardineria, Agrotecnio, Universitat de Lleida, Lleida, Spain
- *Correspondence: Joel Torra,
| | - José María Montull
- Department d’Hortofructicultura, Botànica i Jardineria, Agrotecnio, Universitat de Lleida, Lleida, Spain
| | - Andreu Taberner
- Department d’Hortofructicultura, Botànica i Jardineria, Agrotecnio, Universitat de Lleida, Lleida, Spain
| | - Nawaporn Onkokesung
- Agriculture, School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Neil Boonham
- Agriculture, School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Robert Edwards
- Agriculture, School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
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Scarabel L, Panozzo S, Loddo D, Mathiassen SK, Kristensen M, Kudsk P, Gitsopoulos T, Travlos I, Tani E, Chachalis D, Sattin M. Diversified Resistance Mechanisms in Multi-Resistant Lolium spp. in Three European Countries. FRONTIERS IN PLANT SCIENCE 2020; 11:608845. [PMID: 33384707 PMCID: PMC7769757 DOI: 10.3389/fpls.2020.608845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
Annual ryegrass species (Lolium spp.) infest cereal crops worldwide. Ryegrass populations with multiple resistance to the acetyl coenzyme A carboxylase (ACCase) and acetolactate synthase (ALS) inhibitors are an increasing problem in several European countries. We investigated the resistance pattern and level of resistance in ryegrass populations collected in Denmark, Greece and Italy and studied the diversity of mechanisms endowing resistance, both target-site and metabolism based. All populations showed high resistance indexes (RI) to the ALS inhibitors, iodosufuron-methyl-sodium + mesosulfuron-methyl (RI from 8 to 70), whereas the responses to the two ACCase inhibitors, clodinafop-propargyl and pinoxaden, differed. The Greek and Italian populations were moderately to highly resistant to clodinafop (RI > 8) and showed low to moderate resistance to pinoxaden (RI ranged from 3 to 13) except for one Italian population. In contrast, the Danish Lolium populations showed low to moderate resistance to clodinafop (RI ranged from 2 to 7) and only one population was resistant to pinoxaden. Different mutant ACCase alleles (Leu1781, Cys2027, Asn2041, Val2041, Gly2078, Arg2088, Ala2096) and ALS alleles (Gly122, Ala197, Gln197, Leu197, Ser197, Thr197, Val205, Asn376, Glu376, Leu574) endowing resistance were detected in the Greek and Italian populations. In several plants, no mutated ALS and ACCase alleles were found showing a great heterogeneity within and among the Greek and Italian populations. Conversely, no mutant ACCase alleles were identified in the four Danish populations and only one mutant ALS allele (Leu574) was detected in two Danish populations. The expression level of nitronate monooxygenase (NMO), glutathione S-transferase (GST) and cytochrome P450s (CYP72A1 and CYP72A2) varied broadly among populations and individual plants within the populations. Constitutive up-regulation of GST, CYP72A1 and CYP72A2 was detected in resistant plants respect to susceptible plants in one Danish and one Italian population. It appears that the mechanisms underlying resistance are rather complex and diversified among Lolium spp. populations from the three countries, coevolution of both target-site resistance and metabolic based herbicide resistance appears to be a common feature in Denmark and Italy. This must be considered and carefully evaluated in adopting resistance management strategies to control Lolium spp. in cereal crops.
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Affiliation(s)
- Laura Scarabel
- Institute for Sustainable Plant Protection (IPSP-CNR), National Research Council of Italy, Padua, Italy
| | - Silvia Panozzo
- Institute for Sustainable Plant Protection (IPSP-CNR), National Research Council of Italy, Padua, Italy
| | - Donato Loddo
- Institute for Sustainable Plant Protection (IPSP-CNR), National Research Council of Italy, Padua, Italy
| | | | | | - Per Kudsk
- Department of Agroecology, Aarhus University, Flakkebjerg, Denmark
| | - Thomas Gitsopoulos
- Institute of Plant Breeding and Genetic Resources, Hellenic Agricultural Organization-Demeter, Thessaloniki, Greece
| | - Ilias Travlos
- Department of Crop Science, Agricultural University of Athens, Athens, Greece
| | - Eleni Tani
- Department of Crop Science, Agricultural University of Athens, Athens, Greece
| | | | - Maurizio Sattin
- Institute for Sustainable Plant Protection (IPSP-CNR), National Research Council of Italy, Padua, Italy
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Ma H, Lu H, Han H, Yu Q, Powles S. Metribuzin resistance via enhanced metabolism in a multiple herbicide resistant Lolium rigidum population. PEST MANAGEMENT SCIENCE 2020; 76:3785-3791. [PMID: 32452149 DOI: 10.1002/ps.5929] [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] [Received: 03/06/2020] [Revised: 05/11/2020] [Accepted: 05/26/2020] [Indexed: 05/10/2023]
Abstract
BACKGROUND The photosystem II (PSII)-inhibiting herbicides are important for Australian farmers to control Lolium rigidum Gaud. and other weed species in trazine tolerant (TT)-canola fields. A L. rigidum population (R) collected from a TT-canola field from Western Australia showed multiple resistance to PSII, acetyl-coenzyme A carboxylase (ACCase) and acetolactate synthase (ALS) inhibitors. The mechanisms of multiple resistance in this R population were determined. RESULTS The R population showed a low-level (about 3.0-fold) resistance to the PSII-inhibiting herbicides metribuzin and atrazine. Sequencing of the psbA gene revealed no differences between the R and susceptible (S) sequences. Furthermore, [14 C]-metribuzin experiments found no significant difference in metribuzin foliar uptake and translocation between the R and S plants. However, [14 C]-metribuzin metabolism in R plants was 2.3-fold greater than in S plants. The cytochrome P450 monooxygenase inhibitor piperonyl butoxide (PBO) enhanced plant mortality response to metribuzin and atrazine in both R and S populations. In addition, multiple resistance to ALS and ACCase inhibitors are due to known resistance mutations in ALS and ACCase genes. CONCLUSION The results demonstrate that enhanced metribuzin metabolism likely involving cytochrome P450 monooxygenase contributes to metribuzin resistance in Lolium rigidum. This is the first report of metabolic resistance to the PSII-inhibiting herbicide metribuzin in Australian Lolium rigidum. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Hongju Ma
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, P. R. China
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture and Environment, The University of Western Australia, Crawley, WA, Australia
| | - Huan Lu
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture and Environment, The University of Western Australia, Crawley, WA, Australia
| | - Heping Han
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture and Environment, The University of Western Australia, Crawley, WA, Australia
| | - Qin Yu
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture and Environment, The University of Western Australia, Crawley, WA, Australia
| | - Stephen Powles
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture and Environment, The University of Western Australia, Crawley, WA, Australia
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Vázquez-García JG, Alcántara-de la Cruz R, Palma-Bautista C, Rojano-Delgado AM, Cruz-Hipólito HE, Torra J, Barro F, De Prado R. Accumulation of Target Gene Mutations Confers Multiple Resistance to ALS, ACCase, and EPSPS Inhibitors in Lolium Species in Chile. FRONTIERS IN PLANT SCIENCE 2020; 11:553948. [PMID: 33193482 PMCID: PMC7655540 DOI: 10.3389/fpls.2020.553948] [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: 04/21/2020] [Accepted: 10/08/2020] [Indexed: 06/11/2023]
Abstract
Different Lolium species, common weeds in cereal fields and fruit orchards in Chile, were reported showing isolated resistance to the acetyl CoA carboxylase (ACCase), acetolactate synthase (ALS) and 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) inhibiting herbicides in the late 1990s. The first case of multiple resistance to these herbicides was Lolium multiflorum found in spring barley in 2007. We hypothesized that other Lolium species may have evolved multiple resistance. In this study, we characterized the multiple resistance to glyphosate, diclofop-methyl and iodosulfuron-methyl-sodium in Lolium rigidum, Lolium perenne and Lolium multiflorum resistant (R) populations from Chile collected in cereal fields. Lolium spp. populations were confirmed by AFLP analysis to be L. rigidum, L. perenne and L. multiflorum. Dose-response assays confirmed multiple resistance to glyphosate, diclofop-methyl and iodosulfuron methyl-sodium in the three species. Enzyme activity assays (ACCase, ALS and EPSPS) suggested that the multiple resistance of the three Lolium spp. was caused by target site mechanisms, except the resistance to iodosulfuron in the R L. perenne population. The target site genes sequencing revealed that the R L. multiflorum population presented the Pro-106-Ser/Ala (EPSPS), Ile-2041-Asn++Asp-2078-Gly (ACCase), and Trp-574-Leu (ALS) mutations; and the R L. rigidum population had the Pro-106-Ser (EPSPS), Ile-1781-Leu+Asp-2078-Gly (ACCase) and Pro-197-Ser/Gln+Trp-574-Leu (ALS) mutations. Alternatively, the R L. perenne population showed only the Asp-2078-Gly (ACCase) mutation, while glyphosate resistance could be due to EPSPS gene amplification (no mutations but high basal enzyme activity), whereas iodosulfuron resistance presumably could involve non-target site resistance (NTSR) mechanisms. These results support that the accumulation of target site mutations confers multiple resistance to the ACCase, ALS and EPSPS inhibitors in L. multiflorum and L. rigidum from Chile, while in L. perenne, both target and NTSR could be present. Multiple resistance to three herbicide groups in three different species of the genus Lolium in South America represents a significant management challenge.
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Affiliation(s)
- José G. Vázquez-García
- Department of Agricultural Chemistry and Edaphology, University of Córdoba, Córdoba, Spain
| | | | | | | | - Hugo E. Cruz-Hipólito
- 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
| | - Francisco Barro
- Department of Plant Breeding, Institute for Sustainable Agriculture, CSIC (IAS-CSIC), Córdoba, Spain
| | - Rafael De Prado
- Department of Agricultural Chemistry and Edaphology, University of Córdoba, Córdoba, Spain
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28
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Zhao N, Yan Y, Du L, Zhang X, Liu W, Wang J. Unravelling the effect of two herbicide resistance mutations on acetolactate synthase kinetics and growth traits. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3535-3542. [PMID: 32150619 PMCID: PMC7475246 DOI: 10.1093/jxb/eraa120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 03/06/2020] [Indexed: 05/04/2023]
Abstract
Gene mutations conferring herbicide resistance are hypothesized to have negative pleiotropic effects on plant growth and fitness, which may in turn determine the evolutionary dynamics of herbicide resistance alleles. We used the widespread, annual, diploid grass weed Alopecurus aequalis as a model species to investigate the effect of two resistance mutations-the rare Pro-197-Tyr mutation and the most common mutation, Trp-574-Leu-on acetolactate synthase (ALS) functionality and plant growth. We characterized the enzyme kinetics of ALS from two purified A. aequalis populations, each homozygous for the resistance mutation 197-Tyr or 574-Leu, and assessed the pleiotropic effects of these mutations on plant growth. Both mutations reduced sensitivity of ALS to ALS-inhibiting herbicides without significant changes in extractable ALS activity. The 197-Tyr mutation slightly decreased the substrate affinity (corresponding to an increased Km for pyruvate) and maximum reaction velocity (Vmax) of ALS, whereas the 574-Leu mutation significantly increased these kinetics. Significant decrease or increase in plant growth associated, respectively, with the 197-Tyr and 574-Leu resistance mutations was highly correlated with their impact on ALS kinetics, suggesting more likely persistence of the 574-Leu mutation than the 197-Tyr mutation if herbicide application is discontinued.
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Affiliation(s)
- Ning Zhao
- College of Plant Protection, Shandong Agricultural University, Tai’an, China
- Key Laboratory of Pesticide Toxicology and Application Technology, Shandong Agricultural University, Tai’an, China
| | - Yanyan Yan
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an, China
| | - Long Du
- Pest Bio-control Lab, Shandong Peanut Research Institute, Qingdao, China
| | - Xiaolin Zhang
- College of Plant Protection, Shandong Agricultural University, Tai’an, China
- Key Laboratory of Pesticide Toxicology and Application Technology, Shandong Agricultural University, Tai’an, China
| | - Weitang Liu
- College of Plant Protection, Shandong Agricultural University, Tai’an, China
- Key Laboratory of Pesticide Toxicology and Application Technology, Shandong Agricultural University, Tai’an, China
- Correspondence: or
| | - Jinxin Wang
- College of Plant Protection, Shandong Agricultural University, Tai’an, China
- Key Laboratory of Pesticide Toxicology and Application Technology, Shandong Agricultural University, Tai’an, China
- Correspondence: or
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29
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Developing high-efficiency base editors by combining optimized synergistic core components with new types of nuclear localization signal peptide. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.cj.2020.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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30
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Nandula VK, Giacomini DA, Lawrence BH, Molin WT, Bond JA. Resistance to clethodim in Italian ryegrass (Lolium perenne ssp. multiflorum) from Mississippi and North Carolina. PEST MANAGEMENT SCIENCE 2020; 76:1378-1385. [PMID: 31613044 DOI: 10.1002/ps.5650] [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: 10/19/2018] [Revised: 09/24/2019] [Accepted: 10/10/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Clethodim, an acetyl-CoA carboxylase (ACCase)-inhibiting herbicide, is one of the few postemergence chemical control options available to growers of Mississippi to manage glyphosate and/or other herbicide resistant Italian ryegrass populations. Recently, clethodim failed to adequately control Italian ryegrass populations across Mississippi. A sethoxydim, also an ACCase inhibitor, -resistant Italian ryegrass population from North Carolina was cross-resistant to clethodim. This research characterized the magnitude and mechanisms of clethodim resistance in the Mississippi and North Carolina Italian ryegrass populations via whole-plant herbicide dose response, cross resistance, and metabolism studies, and molecular analysis. RESULTS Two clethodim-resistant biotypes from Mississippi, MS24 and MS37, were 10- and 4-fold resistant, respectively, relative to a susceptible (SUS1) biotype. A North Carolina biotype, NC21, was 40-fold resistant to clethodim compared to SUS1. Two additional biotypes from North Carolina, NC22 and NC 23, recorded shoot dry weight reduction of only 17-30% of nontreated at the highest clethodim dose of 2.17 kg ha-1 , (8×). The NC22 biotype was cross-resistant to sethoxydim, fluazifop, quizalofop, and pinoxaden. Metabolic inhibitors such as piperonyl butoxide and 4-chloro-7-nitrobenzofurazan did not affect resistance of MS37, MS51, and NC22 biotypes to fenoxaprop, clethodim, or pinoxaden. The MS37 biotype had three target site mutations, I2041N, C2088R, and G2096A. Another clethodim-resistant biotype from Mississippi, MS51, had only the C2088R substitution. The NC22 and NC23 biotypes had I1781L, I2041N, and D2078G replacements. CONCLUSION This study shows that the mechanism of resistance to clethodim in Italian ryegrass from Mississippi and North Carolina is due to target site modifications in the ACCase gene leading to broad cross-resistance to other ACCase-inhibiting herbicides. Published 2019. This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- Vijay K Nandula
- Crop Production Systems Research Unit, USDA-ARS, Stoneville, MS, USA
| | - Darci A Giacomini
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | - Benjamin H Lawrence
- Delta Research and Extension Center, Mississippi State University, Stoneville, MS, USA
| | - William T Molin
- Crop Production Systems Research Unit, USDA-ARS, Stoneville, MS, USA
| | - Jason A Bond
- Delta Research and Extension Center, Mississippi State University, Stoneville, MS, USA
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Molecular characteristics of the first case of haloxyfop-resistant Poa annua. Sci Rep 2020; 10:4231. [PMID: 32144361 PMCID: PMC7060245 DOI: 10.1038/s41598-020-61104-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 01/06/2020] [Indexed: 12/02/2022] Open
Abstract
Haloxyfop is one of two acetyl-coenzyme A carboxylase (ACCase) inhibitors that is recommended for controlling Poa annua. We have characterised a population of P. annua that had developed resistance to haloxyfop. This resistant population was found to be almost 20 times less sensitive to haloxyfop than a susceptible population based on percentage survival of individuals in two dose-response experiments. However, the haloxyfop-resistant population was still susceptible to clethodim. Pre-treatment of resistant individuals with a cytochrome P450 inhibitor, malathion, did not change the sensitivity level of the resistant plants to haloxyfop, suggesting that a non-target site mechanism of resistance involving enhanced metabolism, was not responsible for this resistance in P. annua. Gene sequencing showed that a target site mutation at position 2041, which replaced isoleucine with threonine in the carboxyltransferase (CT) domain of the ACCase enzyme, was associated with resistance to haloxyfop in the resistant population. An evaluation of the 3-D structure of the CT domain suggested that, unlike Asn-2041, which is the most common mutation at this position reported to date, Thr-2041 does not change the conformational structure of the CT domain. This is the first study investigating the molecular mechanism involved with haloxyfop resistance in P. annua.
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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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Anthimidou E, Ntoanidou S, Madesis P, Eleftherohorinos I. Mechanisms of Lolium rigidum multiple resistance to ALS- and ACCase-inhibiting herbicides and their impact on plant fitness. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 164:65-72. [PMID: 32284138 DOI: 10.1016/j.pestbp.2019.12.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/27/2019] [Accepted: 12/27/2019] [Indexed: 06/11/2023]
Abstract
Three putative resistant (R1, R2, R3) and one susceptible (S) Lolium rigidum populations originating from Greece were studied for resistance to ALS and ACCase inhibiting herbicides, using whole plant, sequencing of als and accase gene, and in vitro ALS activity assays. The S and two R (R1, R2) populations were also evaluated for fitness in competition with wheat. The whole plant assay indicated unsatisfactory control of the R populations with mesosulfuron-methyl + iodosulfuron-methyl or pinoxaden application, whereas sequencing of the als gene revealed that all ALS-resistant individuals had a Pro-197 substitution by Leu, Glu, Ser, Ala, Thr, or Gln. In addition, the accase gene of all pinoxaden resistant individuals had an Ile-2041 substitution by Asn or Thr. Furthermore, sequencing of the individuals surviving mesosulfuron-methyl + iodosulfuron-methyl or pinoxaden treatment revealed co-existence of point mutations in the accase or als genes, respectively, demonstrating multiple resistance. The in vitro activity of the ALS enzyme confirmed that resistance to mesosulfuron-methyl + iodosulfuron-methyl was due altered target-site. The recorded higher vigor and greater competitive ability of S population against wheat as compared with that of the R populations suggests an associated fitness cost with multiple resistance.
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Affiliation(s)
- E Anthimidou
- Aristotle University of Thessaloniki, School of Agriculture, Thessaloniki, Greece
| | - S Ntoanidou
- Aristotle University of Thessaloniki, School of Agriculture, Thessaloniki, Greece
| | - P Madesis
- Institute of Applied Biosciences-CERTH, 6th Km. Charilaou-Thermi Road, Thessaloniki, Greece
| | - I Eleftherohorinos
- Aristotle University of Thessaloniki, School of Agriculture, Thessaloniki, Greece.
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Chen J, Chu Z, Han H, Goggin DE, Yu Q, Sayer C, Powles SB. A Val-202-Phe α-tubulin mutation and enhanced metabolism confer dinitroaniline resistance in a single Lolium rigidum population. PEST MANAGEMENT SCIENCE 2020; 76:645-652. [PMID: 31329340 DOI: 10.1002/ps.5561] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/15/2019] [Accepted: 07/16/2019] [Indexed: 05/13/2023]
Abstract
BACKGROUND A Lolium rigidum population collected from Western Australia was previously reported as highly resistant to dinitroaniline herbicides mainly due to a Val-202-Phe substitution in the target site α-tubulin protein. To further determine the contribution of the 202 mutation to resistance, two sub-populations, respectively comprising the 202 mutant and wild-type (WT) individuals, were isolated from within the same resistant population and subject to dinitroaniline herbicide doses. A rice transgenic study was conducted to demonstrate whether the amino acid substitution at the 202 residue confers resistance. In addition, as indicated in the phenotyping and genotyping study, non-target enhanced trifluralin metabolism was further examined in the same population. RESULTS The 202 mutants were more resistant than the wild-type plants. Rice calli transformed with the L. rigidum mutant α-tubulin gene (Val-202-Phe) were more resistant to dinitroaniline herbicides relative to calli transformed with the wild-type gene. Also, enhanced trifluralin metabolism was detected in the 202 mutants in comparison to the susceptible seedlings. CONLCUSION Both target-site Val-202-Phe α-tubulin mutation and non-target-site enhanced trifluralin metabolism co-exist in this dinitroaniline-resistant L. rigidum population. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Jinyi Chen
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture and Environment, University of Western Australia (UWA), Perth, Australia
| | - Zhizhan Chu
- College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Heping Han
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture and Environment, University of Western Australia (UWA), Perth, Australia
| | - Danica E Goggin
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture and Environment, University of Western Australia (UWA), Perth, Australia
| | - Qin Yu
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture and Environment, University of Western Australia (UWA), Perth, Australia
| | | | - Stephen B Powles
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture and Environment, University of Western Australia (UWA), Perth, Australia
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Mishra R, Joshi RK, Zhao K. Base editing in crops: current advances, limitations and future implications. PLANT BIOTECHNOLOGY JOURNAL 2020; 18:20-31. [PMID: 31365173 PMCID: PMC6920333 DOI: 10.1111/pbi.13225] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/23/2019] [Accepted: 07/29/2019] [Indexed: 05/19/2023]
Abstract
Targeted mutagenesis via genome-editing technologies holds great promise in developing improved crop varieties to meet future demands. Point mutations or single nucleotide polymorphisms often determine important agronomic traits of crops. Genome-editing-based single-base changes could generate elite trait variants in crop plants which help in accelerating crop improvement. Among the genome-editing technologies, base editing has emerged as a novel and efficient genome-editing approach which enables direct and irreversible conversion of one target base into another in a programmable manner. A base editor is a fusion of catalytically inactive CRISPR-Cas9 domain (Cas9 variants) and cytosine or adenosine deaminase domain that introduces desired point mutations in the target region enabling precise editing of genomes. In the present review, we have summarized the development of different base-editing platforms. Then, we have focussed on the current advances and the potential applications of this precise technology in crop improvement. The review also sheds light on the limitations associated with this technology. Finally, the future perspectives of this emerging technology towards crop improvement have been highlighted.
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Affiliation(s)
- Rukmini Mishra
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop ScienceChinese Academy of Agriculture Sciences (CAAS)BeijingChina
| | - Raj Kumar Joshi
- Department of BiotechnologyRama Devi Women's UniversityBhubaneswarOdishaIndia
| | - Kaijun Zhao
- National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop ScienceChinese Academy of Agriculture Sciences (CAAS)BeijingChina
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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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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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Kaundun SS, Marchegiani E, Hutchings SJ, Baker K. Derived Polymorphic Amplified Cleaved Sequence (dPACS): A Novel PCR-RFLP Procedure for Detecting Known Single Nucleotide and Deletion-Insertion Polymorphisms. Int J Mol Sci 2019; 20:E3193. [PMID: 31261867 PMCID: PMC6651057 DOI: 10.3390/ijms20133193] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 06/21/2019] [Accepted: 06/27/2019] [Indexed: 12/21/2022] Open
Abstract
Most methods developed for detecting known single nucleotide polymorphisms (SNP) and deletion-insertion polymorphisms (DIP) are dependent on sequence conservation around the SNP/DIP and are therefore not suitable for application to heterogeneous organisms. Here we describe a novel, versatile and simple PCR-RFLP procedure baptised 'derived Polymorphic Amplified Cleaved Sequence' (dPACS) for genotyping individual samples. The notable advantage of the method is that it employs a pair of primers that cover the entire fragment to be amplified except for one or few diagnostic bases around the SNP/DIP being investigated. As such, it provides greater opportunities to introduce mismatches in one or both of the 35-55 bp primers for creating a restriction site that unambiguously differentiates wild from mutant sequences following PCR-RFLP and horizontal MetaPhorTM gel electrophoresis. Selection of effective restriction enzymes and primers is aided by the newly developed dPACS 1.0 software. The highly transferable dPACS procedure is exemplified here with the positive detection (in up to 24 grass and broadleaf species tested) of wild type proline106 of 5-enolpyruvylshikimate-3-phosphate synthase and its serine, threonine and alanine variants that confer resistance to glyphosate, and serine264 and isoleucine2041 which are key target-site determinants for weed sensitivities to some photosystem II and acetyl-CoA carboxylase inhibiting herbicides, respectively.
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Affiliation(s)
- Shiv Shankhar Kaundun
- Herbicide Bioscience, Syngenta Ltd., Jealott's Hill International Research Centre, RG42 6EY Bracknell, UK.
| | - Elisabetta Marchegiani
- Herbicide Bioscience, Syngenta Ltd., Jealott's Hill International Research Centre, RG42 6EY Bracknell, UK
| | - Sarah-Jane Hutchings
- Herbicide Bioscience, Syngenta Ltd., Jealott's Hill International Research Centre, RG42 6EY Bracknell, UK
| | - Ken Baker
- General Bioinformatics, Jealott's Hill International Research Centre, RG42 6EY Bracknell, UK
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Xiong G, Zou L, Deng Y, Meng Y, Liao X, Lu H. Clethodim exposure induces developmental immunotoxicity and neurobehavioral dysfunction in zebrafish embryos. FISH & SHELLFISH IMMUNOLOGY 2019; 86:549-558. [PMID: 30517881 DOI: 10.1016/j.fsi.2018.12.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/27/2018] [Accepted: 12/01/2018] [Indexed: 06/09/2023]
Abstract
Clethodim is one of the most widely used herbicides in agriculture, but its potential negative effects on aquatic organisms are still poorly understood. This study examined the effects of clethodim on zebrafish at aspects of early stage embryonic development, immune toxicity, cell apoptosis and locomotor behavior. Firstly, clethodim exposure markedly decreased the survival rate, body length, and heart rate and resulted in a series of morphological abnormalities, primarily spinal deformities (SD) and yolk sac edema, in zebrafish larvae. Secondly, the number of immune cells was substantially reduced but the levels of apoptosis and oxidative stress were significantly increased in a dose-dependent manner upon clethodim exposure. Thirdly, we evaluated the expression of some key genes in TLR signaling including TLR4, MyD88, and NF-κB p65 and they were all up-regulated by exposure to 300 μg/L clethodim. Meanwhile, some proinflammatory cytokines such as TNF-α, IL-1β, IL8, and IFN-γ were also activated in both the mock and the TLR4-KD conditions. Moreover, the locomotor behaviors and the enzymatic activities of AChE were obviously inhibited but the levels of acetylated histone H3 were greatly increased by clethodim exposure. In addition, incubation of zebrafish larvae with acetylcholine receptor (AChR) agonist carbachol can partially rescue the clethodim-modulated locomotor behavior. Taken together, our results suggest that clethodim has the potential to induce developmental immunotoxicity and cause behavioral alterations in zebrafish larvae. The information presented in this study will help to elucidate the molecular mechanisms underlying clethodim exposure in aquatic ecosystems.
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Affiliation(s)
- Guanghua Xiong
- College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, Jiangxi, China; Jiangxi Key Laboratory of Developmental Biology of Organs, Ji'an, Jiangxi, China
| | - Lufang Zou
- College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China
| | - Yunyun Deng
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, Jiangxi, China; Jiangxi Key Laboratory of Developmental Biology of Organs, Ji'an, Jiangxi, China
| | - Yunlong Meng
- College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China
| | - Xinjun Liao
- College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, Jiangxi, China; Jiangxi Key Laboratory of Developmental Biology of Organs, Ji'an, Jiangxi, China
| | - Huiqiang Lu
- College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, Jiangxi, China; Jiangxi Key Laboratory of Developmental Biology of Organs, Ji'an, Jiangxi, China.
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Belz RG, Farooq MB, Wagner J. Does selective hormesis impact herbicide resistance evolution in weeds? ACCase-resistant populations of Alopecurus myosuroides Huds. as a case study. PEST MANAGEMENT SCIENCE 2018; 74:1880-1891. [PMID: 29446872 DOI: 10.1002/ps.4890] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 01/21/2018] [Accepted: 02/10/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND A field-evolved herbicide-resistant weed population can represent a heterogeneous composite of subpopulations that differ in their susceptibility and responsiveness to herbicide hormesis. Variable hormesis responsiveness can result in selection for and against certain subpopulations under low herbicide doses, and this has the potential to contribute to the evolution of resistance. The relevance of this hypothesis at practical field rates was studied for two field-collected acetyl-coenzyme A carboxylase (ACCase) target-site resistant (TSR) biotypes of Alopecurus myosuroides Huds. (haplotype Leu1781) exposed to three ACCase inhibitors. Herbicide dose responses were evaluated at the population level and at different subpopulation levels after the dissection of individual plants by herbicide selection and genotyping. RESULTS The practical field rates of fenoxaprop-P were lower than the observed hormetic doses in the resistant subpopulation, whereas the field rates of clodinafop and cycloxydim stimulated the shoot biomass in different resistant subpopulations by 21-38% above that of the control. Because variable dose levels induced hormesis in the different subpopulations, the practical field rates showed a significant potential to selectively enhance parts of a resistant field population, but did not impact or adversely affect other parts of the population. CONCLUSION As a consequence of population heterogeneity, herbicide hormesis may impact resistance evolution in weeds at realistic use rates via the selective promotion of individual genotypes. However, the practical relevance of this phenomenon may be influenced by many factors, such as the herbicidal active ingredient used, as indicated in this study. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Regina G Belz
- University of Hohenheim, Hans-Ruthenberg Institute, Agroecology Unit, Stuttgart, Germany
| | - Muhammad B Farooq
- University of Hohenheim, Hans-Ruthenberg Institute, Agroecology Unit, Stuttgart, Germany
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Chen G, Xu H, Zhang T, Bai C, Dong L. Fenoxaprop-P-ethyl resistance conferred by cytochrome P450s and target site mutation in Alopecurus japonicus. PEST MANAGEMENT SCIENCE 2018; 74:1694-1703. [PMID: 29337421 DOI: 10.1002/ps.4863] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 11/15/2017] [Accepted: 01/09/2018] [Indexed: 05/13/2023]
Abstract
BACKGROUND Alopecurus japonicus is a serious grass weed species in wheat fields in eastern Asia, and has evolved strong resistance to acetyl-CoA carboxylase (ACCase)-inhibiting herbicides. Although target-site resistance (TSR) to ACCase inhibitors in A. japonicus has been reported, non-target site resistance (NTSR) has not. This study investigated both TSR and NTSR in a fenoxaprop-P-ethyl-resistant A. japonicus population (AHFD-3), which was collected in Feidong County, Anhui Province, China. RESULTS We found that AHFD-3 exhibited high resistance to fenoxaprop-P-ethyl and low resistance to flucarbazone-sodium. The sensitivity of AHFD-3 to fenoxaprop-P-ethyl increased significantly after treatment with cytochrome P450 (P450) inhibitors; however, such synergies between P450 inhibitors and fenoxaprop-P-ethyl were not found in two control populations. Sequences of the entire carboxyltransferase domain of A. japonicus ACCase were obtained, and AHFD-3 plants showed an Asp-2078-Gly substitution in the ACCase. With the derived cleaved amplified polymorphic sequence (dCAPS) method, we found that 85.4% of the plants of AHFD-3 carried this mutation. The P450 content in AHFD-3 plants was significantly higher than those of the two control populations after treatment with fenoxaprop-P-ethyl. Ten partial sequences of P450 genes in A. japonicus were cloned. Three P450 genes were up-regulated 12 h after fenoxaprop-P-ethyl treatment, which were all from the P450 subfamily CYP72A. Moreover, a P450 gene from the P450 family CYP81 was up-regulated after fenoxaprop-P-ethyl treatment in all populations studied. CONCLUSION Fenoxaprop-P-ethyl resistance in AHFD-3 plants was conferred by up-regulation of cytochrome P450s in the CYP72A subfamily and target site mutation of the ACCase gene. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Guoqi Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Hongle Xu
- Institute of Plant Protection, Henan Province Academy of Agricultural Sciences, Key Laboratory of Crop Pest Control in Henan Province, Zhengzhou, China
| | - Teng Zhang
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
| | - Congqiang Bai
- College of Plant Protection, Nanjing Agricultural University, Nanjing, 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, China
- Key Laboratory of Integrated Pest Management on Crops in East China (Nanjing Agricultural University), Ministry of Agriculture, China
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Li C, Zong Y, Wang Y, Jin S, Zhang D, Song Q, Zhang R, Gao C. Expanded base editing in rice and wheat using a Cas9-adenosine deaminase fusion. Genome Biol 2018; 19:59. [PMID: 29807545 PMCID: PMC5972399 DOI: 10.1186/s13059-018-1443-z] [Citation(s) in RCA: 246] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 05/03/2018] [Indexed: 11/10/2022] Open
Abstract
Nucleotide base editors in plants have been limited to conversion of cytosine to thymine. Here, we describe a new plant adenine base editor based on an evolved tRNA adenosine deaminase fused to the nickase CRISPR/Cas9, enabling A•T to G•C conversion at frequencies up to 7.5% in protoplasts and 59.1% in regenerated rice and wheat plants. An endogenous gene is also successfully modified through introducing a gain-of-function point mutation to directly produce an herbicide-tolerant rice plant. With this new adenine base editing system, it is now possible to precisely edit all base pairs, thus expanding the toolset for precise editing in plants.
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Affiliation(s)
- Chao Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yuan Zong
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yanpeng Wang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Shuai Jin
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Dingbo Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Qianna Song
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Rui Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Caixia Gao
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
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Chen J, Yu Q, Owen M, Han H, Powles S. Dinitroaniline herbicide resistance in a multiple-resistant Lolium rigidum population. PEST MANAGEMENT SCIENCE 2018; 74:925-932. [PMID: 29148165 DOI: 10.1002/ps.4790] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/03/2017] [Accepted: 11/13/2017] [Indexed: 05/03/2023]
Abstract
BACKGROUND The pre-emergence dinitroaniline herbicides (such as trifluralin and pendimethalin) are vital to Australian no-till farming systems. A Lolium rigidum population collected from the Western Australian grain belt with a 12-year trifluralin use history was characterised for resistance to dinitroaniline, acetyl CoA carboxylase (ACCase)- and acetolactate synthase (ALS)-inhibiting herbicides. Target-site resistance mechanisms were investigated. RESULTS This L. rigidum population exhibited 32-fold resistance to trifluralin, as compared with the susceptible population. It also displayed 12- to 30-fold cross-resistance to other dinitroaniline herbicides (pendimethalin, ethalfluralin and oryzalin). In addition, this population showed multiple resistance to commonly used post-emergence ACCase- and ALS-inhibiting herbicides. Two target-site α-tubulin gene mutations (Val-202-Phe and Thr-239-Ile) previously documented in other dinitroaniline-resistant weed species were identified, and some known target-site mutations in ACCase (Ile-1781-Leu, Asp-2078-Gly and Cys-2088-Arg) and ALS (Pro-197-Gln/Ser) were found in the same population. An agar-based Petri dish screening method was established for the rapid diagnosis of resistance to dinitroaniline herbicides. CONCLUSION Evolution of target-site resistance to both pre- and post-emergence herbicides was confirmed in a single L. rigidum population. The α-tubulin mutations Val-202-Phe and Thr-239-Ile, documented here for the first time in L. rigidum, are likely to be responsible for dinitroaniline resistance in this population. Early detection of dinitroaniline herbicide resistance and integrated weed management strategies are needed to maintain the effectiveness of dinitroaniline herbicides. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Jinyi Chen
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture & Environment, University of Western Australia, Crawley, Australia
| | - Qin Yu
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture & Environment, University of Western Australia, Crawley, Australia
| | - Mechelle Owen
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture & Environment, University of Western Australia, Crawley, Australia
| | - Heping Han
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture & Environment, University of Western Australia, Crawley, Australia
| | - Stephen Powles
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture & Environment, University of Western Australia, Crawley, Australia
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Tehranchian P, Nandula V, Jugulam M, Putta K, Jasieniuk M. Multiple resistance to glyphosate, paraquat and ACCase-inhibiting herbicides in Italian ryegrass populations from California: confirmation and mechanisms of resistance. PEST MANAGEMENT SCIENCE 2018; 74:868-877. [PMID: 29072814 DOI: 10.1002/ps.4774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 10/16/2017] [Accepted: 10/22/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Glyphosate, paraquat and acetyl CoA carboxylase (ACCase)-inhibiting herbicides are widely used in California annual and perennial cropping systems. Recently, glyphosate, paraquat, and ACCase- and acetolactate synthase (ALS)-inhibitor resistance was confirmed in several Italian ryegrass populations from the Central Valley of California. This research characterized the possible mechanisms of resistance. RESULTS Multiple-resistant populations (MR1, MR2) are resistant to several herbicides from at least three modes of action. Dose-response experiments revealed that the MR1 population was 45.9-, 122.7- and 20.5-fold, and the MR2 population was 24.8-, 93.9- and 4.0-fold less susceptible to glyphosate, sethoxydim and paraquat, respectively, than the susceptible (Sus) population. Accumulation of shikimate in Sus plants was significantly greater than in MR plants 32 h after light pretreatments. Glyphosate resistance in MR plants was at least partially due to Pro106-to-Ala and Pro106-to-Thr substitutions at site 106 of 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS). EPSPS gene copy number and expression level were similar in plants from the Sus and MR populations. An Ile1781-to-Leu substitution in ACCase gene of MR plants conferred a high level of resistance to sethoxydim and cross-resistance to other ACCase-inhibitors. Radiolabeled herbicide studies and phosphorimaging indicated that MR plants had restricted translocation of 14 C-paraquat to untreated leaves compared to Sus plants. CONCLUSION This study shows that multiple herbicide resistance in Italian ryegrass populations in California, USA, is due to both target-site and non-target-site resistance mechanisms. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Parsa Tehranchian
- Department of Plant Sciences, University of California, Davis, CA, USA
| | - Vijay Nandula
- Crop Production Systems Research Unit, United States Department of Agriculture, Stoneville, MS, USA
| | - Mithila Jugulam
- Department of Agronomy, Kansas State University, Manhattan, KS, USA
| | - Karthik Putta
- Department of Agronomy, Kansas State University, Manhattan, KS, USA
| | - Marie Jasieniuk
- Department of Plant Sciences, University of California, Davis, CA, USA
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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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Gao Y, Pan L, Sun Y, Zhang T, Dong L, Li J. Resistance to quinclorac caused by the enhanced ability to detoxify cyanide and its molecular mechanism in Echinochloa crus-galli var. zelayensis. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 143:231-238. [PMID: 29183597 DOI: 10.1016/j.pestbp.2017.08.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 07/29/2017] [Accepted: 08/07/2017] [Indexed: 06/07/2023]
Abstract
Quinclorac, an auxin-type herbicide, is widely used to control barnyardgrass and some dicotyledon weeds. Echinochloa crus-galli var. zelayensis, a variety of E. crus-galli (L.) Beauv., is widespread in China and some populations have resistance to quinclorac. E. crus-galli var. zelayensis seeds with varying sensitivity to quinclorac were used in the present study. The expression of the ADP/ATP carrier protein (ANT) gene, which plays an important role in the maintenance of cellular energy balance, dramatically rose in the S biotype after exposure to quinclorac, while no change was found in two R biotypes. The activity of β-cyanoalanine synthase (β-CAS), which is the key enzyme for cyanide degradation, was higher in two R biotypes than in the S biotype before and after treatment with quinclorac. One single-nucleotide difference was detected in the EcCAS gene of two R biotypes compared with the S biotype. The nucleotide change, which caused one amino acid substitution, replacing Methionine (Met)-295 with Lysine (Lys)-295 in the two R biotypes, which are same as the rice β-CAS gene at this position. In addition, EcCAS gene expression was higher in the two R biotypes than in the S biotype. In conclusion, β-CAS may play a crucial role in the resistance of E. crus-galli var. zelayensis to quinclorac. EcCAS gene mutation and higher gene expression may enhance the activity of β-CAS to avoid the accumulation of toxic cyanide in resistant populations, thus contributing to the resistance mechanism of E. crus-galli var. zelayensis. to quinclorac.
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Affiliation(s)
- Yuan Gao
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China
| | - Lang Pan
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China
| | - Yu Sun
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China
| | - Teng Zhang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China
| | - Liyao Dong
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China.
| | - Jun Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Key Laboratory of Integrated Management of Crop Diseases and Pests, Nanjing Agricultural University, Ministry of Education, China.
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Song D, Wu G, Vrinten P, Qiu X. Development of imidazolinone herbicide tolerant borage (Borago officinalis L.). PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 262:74-80. [PMID: 28716422 DOI: 10.1016/j.plantsci.2017.05.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 05/19/2017] [Accepted: 05/25/2017] [Indexed: 06/07/2023]
Abstract
Borage (Borago officinalis) is an annual herb that produces a high level of gamma-linolenic acid (GLA) in its seed oil. Due to the recognized health benefits of GLA, borage is now commercially cultivated worldwide. However, an herbicide-tolerant variety for effective weed management has not yet been developed. Here we report the generation and characterization of ethyl methanesulfonate (EMS) induced borage mutant lines tolerant to the herbicide imidazolinone. An EMS-mutagenized borage population was generated by using a series of concentrations of EMS to treat mature borage seeds. Screening of the M2 and M3 borage plants using an herbicide treatment resulted in the identification of two imidazolinone-tolerant lines. Sequence analysis of two acetohydroxyacid synthase (AHAS) genes, AHAS1 and AHAS2, from the mutant (tolerant) and wild type (susceptible) borage plants showed that single nucleotide substitutions which resulted in amino acid changes occurred in AHAS1 and AHAS2, respectively in the two tolerant lines. A KASP marker was then developed to differentiate the homozygous susceptible, homozygous tolerant and heterozygous borage plants. An in vitro assay showed that homozygous tolerant borage carrying the AHAS1 mutation retained significantly higher AHAS activity than susceptible borage across different imazamox concentrations. A herbicide dose response test indicated that the line with the AHAS1 mutation could tolerate four times the normally used field concentration of "Solo" herbicide.
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Affiliation(s)
- Dongyan Song
- Department of Food & Bioproduct Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Guohai Wu
- Bioriginal Food & Science Corporation, Saskatoon, SK, Canada
| | | | - Xiao Qiu
- Department of Food & Bioproduct Sciences, University of Saskatchewan, Saskatoon, SK, Canada.
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Shergill LS, Malone J, Boutsalis P, Preston C, Gill G. Basis of ACCase and ALS inhibitor resistance in Hordeum glaucum Steud. PEST MANAGEMENT SCIENCE 2017; 73:1638-1647. [PMID: 27976507 DOI: 10.1002/ps.4501] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 11/02/2016] [Accepted: 12/05/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Acetyl coenzyme-A carboxylase (ACCase) and/or acetolactate synthase (ALS) inhibitor resistance has been identified by herbicide resistance screening in eight populations obtained from cropping regions of South Australia. This study aimed to quantify the level of resistance and characterise the molecular basis of resistance to ACCase and ALS inhibitors in these H. glaucum populations. RESULTS H. glaucum populations from the Upper-North region were highly resistant (resistance index RI > 12) to the aryloxyphenoxypropionate (APP) herbicides quizalofop and haloxyfop and less resistant (RI = 2-12) to cyclohexanedione (CHD) herbicide clethodim, and some Mid-North populations had a low level of resistance (RI = 2-6) to the sulfonylurea (SU) herbicide mesosulfuron. Gene sequencing confirmed the presence of Ile-1781-Leu, Ile-2041-Asn and Gly-2096-Ala mutations in the ACCase gene, with no mutation found in the ALS gene. The use of the known metabolic inhibitor malathion in combination with mesosulfuron enhanced the activity of this herbicide. These populations were also susceptible to SU herbicide sulfometuron. CONCLUSION This study has documented APP-to-CHD herbicide cross-resistance, the first case of ACCase inhibitor resistance due to Ile-2041-Asn mutation, and characterised the resistance to ALS inhibitors in H. glaucum. Resistance to ACCase inhibitors is due to a target-site mutation. The reversal of SU resistance by malathion and susceptibility to sulfometuron suggests that non-target-site mechanisms confer resistance to ALS inhibitors. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Lovreet S Shergill
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
| | - Jenna Malone
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
| | - Peter Boutsalis
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
| | - Christopher Preston
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
| | - Gurjeet Gill
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia
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Busi R, Powles SB. Inheritance of 2,4-D resistance traits in multiple herbicide- resistant Raphanus raphanistrum populations. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 257:1-8. [PMID: 28224914 DOI: 10.1016/j.plantsci.2017.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 01/03/2017] [Accepted: 01/06/2017] [Indexed: 05/10/2023]
Abstract
A relatively low number of weed species have evolved resistance to auxinic herbicides despite their use for almost 70 years. This inheritance study with two Raphanus raphanistrum populations multiple-resistant 2,4-D and the ALS-inhibiting herbicide chlorsulfuron determined the number of genes and genetic dominance of 2,4-D resistance and investigated the association between traits conferring resistance to the two herbicide modes of action. Levels of 2,4-D phenotypic resistance and resistance segregation patterns were assessed in parental populations, F1 and F2 families.
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Affiliation(s)
- Roberto Busi
- Australian Herbicide Resistance Initiative, School of Agriculture and Environment Plant Biology, The University of Western Australia, Crawley, 6009 WA, Australia.
| | - Stephen B Powles
- Australian Herbicide Resistance Initiative, School of Agriculture and Environment Plant Biology, The University of Western Australia, Crawley, 6009 WA, Australia
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Sabet Zangeneh H, Mohammaddust Chamanabad HR, Zand E, Asghari A, Alamisaeid K, Travlos IS, Alebrahim MT. Study of Fitness Cost in Three Rigid Ryegrass Populations Susceptible and Resistant to Acetyl-CoA Carboxylase Inhibiting Herbicides. Front Ecol Evol 2016. [DOI: 10.3389/fevo.2016.00142] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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