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Inheritance of 2,4-dichlorophenoxyacetic acid (2,4-D) resistance in Amaranthus palmeri. Sci Rep 2022; 12:21822. [PMID: 36528649 PMCID: PMC9759536 DOI: 10.1038/s41598-022-25686-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 12/02/2022] [Indexed: 12/23/2022] Open
Abstract
In this study, the inheritance of 2,4-D resistance in a multiple herbicide-resistant Palmer amaranth (KCTR) was investigated. Direct and reciprocal crosses were performed using 2,4-D-resistant KCTR and susceptible KSS plants to generate F1 progenies. 2,4-D dose-response assays were conducted to evaluate the response of progenies from each F1 family along with KCTR and KSS plants in controlled environmental growth chambers. Additionally, 2,4-D-resistant male and female plants from each of the F1 families were used in pairwise crosses to generate pseudo-F2 families. Segregation (resistance or susceptibility) of progenies from the F2 families in response to a discriminatory rate of 2,4-D (i.e., 560 g ae ha-1) was evaluated. Dose-response analysis of F1 progenies derived from direct and reciprocal crosses suggested that the 2,4-D resistance in KCTR is a nuclear trait. Chi-square analyses of F2 segregation data implied that 2,4-D resistance in KCTR is controlled by multiple gene(s). Overall, our data suggest that the 2,4-D resistance in KCTR Palmer amaranth is a nuclear inherited trait controlled by multiple genes. Such resistance can spread both via pollen or seed-mediated gene flow. In future, efforts will be directed towards identifying genes mediating 2,4-D resistance in KCTR population.
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Ghanizadeh H, Harrington KC, He L, James TK. Inheritance of dicamba-resistance in allotetraploid Chenopodium album. PEST MANAGEMENT SCIENCE 2022; 78:4939-4946. [PMID: 36181421 PMCID: PMC9804650 DOI: 10.1002/ps.7114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/31/2022] [Accepted: 08/03/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Chenopodium album L. is a troublesome weed in spring-planted crops, and different levels of ploidy have been documented for this weed species. A population of C. album has evolved resistance to dicamba. The level of ploidy and inheritance of dicamba resistance was studied in this population. RESULTS The resistant and susceptible individuals of C. album were confirmed as tetraploid by flow cytometry. Pair-crosses were made between ten resistant and susceptible individuals. Eight F1 individuals from five crosses were confirmed resistant after treating with dicamba at 400 g a.e. ha-1 . These individuals were selfed, and the response of their progenies to dicamba was assessed in dose-response experiments, and the results confirmed the resistance trait was dominant. Furthermore, an analysis of the segregation patterns revealed that the segregation response of all F2 progenies fitted a 3:1 (resistant/susceptible) ratio when treated with dicamba at 200, 400 and 800 g a.e. ha-1 , suggesting a single gene was responsible for dicamba resistance. CONCLUSIONS Dicamba resistance in the studied tetraploid population of C. album is governed by a single dominant gene. This type of inheritance suggests that selection for dicamba resistance can occur readily. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Hossein Ghanizadeh
- School of Agriculture and EnvironmentMassey UniversityPalmerston NorthNew Zealand
| | - Kerry C Harrington
- School of Agriculture and EnvironmentMassey UniversityPalmerston NorthNew Zealand
| | - Lulu He
- School of Agriculture and EnvironmentMassey UniversityPalmerston NorthNew Zealand
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Barua R, Malone J, Boutsalis P, Gill G, Preston C. Inheritance and mechanism of glyphosate resistance in annual bluegrass (Poa annua L.). PEST MANAGEMENT SCIENCE 2022; 78:1377-1385. [PMID: 34894201 DOI: 10.1002/ps.6754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 12/07/2021] [Accepted: 12/11/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND In initial screening, glyphosate was ineffective in controlling five Poa annua populations. These populations were tested for resistance, and studies undertaken to determine resistance mechanisms and inheritance pattern. RESULTS Dose-response studies conducted at 16/12°C and 27/20°C on the five putative resistant populations showed low-level resistance (1.4- to 2.5-fold) to glyphosate. Shikimic acid accumulation in response to glyphosate confirmed differences among the populations, with greater shikimic acid accumulation in the susceptible population. The EPSPS gene copy number was 0.5- to 5.2-fold greater in one resistant population (HT) than in the susceptible (S) population, but not in the others. EPSPS gene expression was five- to tenfold higher in HT compared with the susceptible population. Target site mutations, differences in glyphosate absorption or translocation or altered expression of aldo-keto reductase (AKR) were not identified in any of the resistant populations. Crosses were successful between one resistant population and the susceptible population (P262-16♂ ✕ S♀) and inheritance of glyphosate resistance appears to be controlled by a single, nuclear dominant gene in this population. CONCLUSION Our study identified EPSPS gene amplification in a South Australian glyphosate-resistant P. annua population (HT). This mechanism of resistance was not identified in the other four glyphosate-resistant populations, and other common mechanisms were excluded. Although the resistance mechanism in some P. annua populations remains unknown, inheritance studies with one population suggest the involvement of a single dominant gene. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Rajesh Barua
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Jenna Malone
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Peter Boutsalis
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Gurjeet Gill
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Christopher Preston
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
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An in-frame deletion mutation in the degron tail of auxin coreceptor IAA2 confers resistance to the herbicide 2,4-D in Sisymbrium orientale. Proc Natl Acad Sci U S A 2022; 119:2105819119. [PMID: 35217601 PMCID: PMC8892348 DOI: 10.1073/pnas.2105819119] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2021] [Indexed: 12/13/2022] Open
Abstract
Synthetic auxin herbicides intersect basic plant developmental biology and applied weed management. We investigated resistance to 2,4-D in the Australian weed Sisymbrium orientale (Indian hedge mustard). We identified a mechanism involving an in-frame 27-bp deletion in the degron tail of auxin coreceptor IAA2, one member of the gene family of Aux/IAA auxin co-receptors. We show that this deletion in IAA2 is a gain-of-function mutation that confers synthetic auxin resistance. This field-evolved mechanism of resistance to synthetic auxin herbicides confirms previous biochemical studies showing the role of the Aux/IAA degron tail in regulating Aux/IAA protein degradation upon auxin perception. The deletion mutation could be generated in crops using gene-editing approaches for cross-resistance to multiple synthetic auxin herbicides. The natural auxin indole-3-acetic acid (IAA) is a key regulator of many aspects of plant growth and development. Synthetic auxin herbicides such as 2,4-D mimic the effects of IAA by inducing strong auxinic-signaling responses in plants. To determine the mechanism of 2,4-D resistance in a Sisymbrium orientale (Indian hedge mustard) weed population, we performed a transcriptome analysis of 2,4-D-resistant (R) and -susceptible (S) genotypes that revealed an in-frame 27-nucleotide deletion removing nine amino acids in the degron tail (DT) of the auxin coreceptor Aux/IAA2 (SoIAA2). The deletion allele cosegregated with 2,4-D resistance in recombinant inbred lines. Further, this deletion was also detected in several 2,4-D-resistant field populations of this species. Arabidopsis transgenic lines expressing the SoIAA2 mutant allele were resistant to 2,4-D and dicamba. The IAA2-DT deletion reduced binding to TIR1 in vitro with both natural and synthetic auxins, causing reduced association and increased dissociation rates. This mechanism of synthetic auxin herbicide resistance assigns an in planta function to the DT region of this Aux/IAA coreceptor for its role in synthetic auxin binding kinetics and reveals a potential biotechnological approach to produce synthetic auxin-resistant crops using gene-editing.
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Adu-Yeboah P, Malone JM, Gill G, Preston C. Non-Mendelian inheritance of gene amplification-based resistance to glyphosate in Hordeum glaucum (barley grass) from South Australia. PEST MANAGEMENT SCIENCE 2021; 77:4298-4302. [PMID: 34148281 DOI: 10.1002/ps.6518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 06/19/2021] [Indexed: 05/15/2023]
Abstract
BACKGROUND Hordeum glaucum Steud. is an important grass weed species in South Australia that has evolved resistance to glyphosate. This study investigated the mode of inheritance of glyphosate resistance in this species. RESULTS Hand-pollination of glyphosate susceptible and resistant populations generated two F1 individuals, selfed to yield F2 progenies. In dose-response experiments, the F2 progenies showed intermediate response between the two parent populations. High variation in EPSPS gene copies was observed among F2 individuals, with some individuals possessing more gene copies than the resistant parent population. No evidence of a Mendelian single-gene pattern of inheritance was observed. CONCLUSION Inheritance of gene amplification in H. glaucum is non-Mendelian. © 2021 Society of Chemical Industry.
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Affiliation(s)
| | - Jenna M Malone
- School of Agriculture, University of Adelaide, Glen Osmond, Australia
| | - Gurjeet Gill
- School of Agriculture, University of Adelaide, Glen Osmond, Australia
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Pandian BA, Sathishraj R, Prasad PVV, Jugulam M. A single gene inherited trait confers metabolic resistance to chlorsulfuron in grain sorghum (Sorghum bicolor). PLANTA 2021; 253:48. [PMID: 33484360 DOI: 10.1007/s00425-020-03563-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 12/31/2020] [Indexed: 06/12/2023]
Abstract
This study confirms a high level of metabolic resistance to the herbicide chlorsulfuron, inherited by a single dominant gene in a sorghum genotype (GL-1). Chlorsulfuron, an acetolactate synthase (ALS)-inhibitor, effectively controls post-emergence grass and broadleaf weeds but is not registered for use in sorghum because of crop injury. The objectives of this study were to characterize the inheritance and mechanism of chlorsulfuron resistance in the sorghum genotype GL-1. Chlorsulfuron dose-response experiments were conducted using GL-1 along with BTx623 (susceptible check), and Pioneer 84G62 (commercial sorghum hybrid). The F1 and F2 progeny were generated by crossing GL-1 with BTx623. To assess if the target site alterations bestow resistance, the ALS gene, the molecular target of chlorsulfuron, was sequenced from GL-1. The role of cytochrome P450 (CYP) in metabolizing chlorsulfuron, using malathion, a CYP-inhibitor was tested. The chlorsulfuron dose-response assay indicated that GL-1 and F1 progeny were ~ 20-fold more resistant to chlorsulfuron relative to BTx623. The F2 progenies segregated 3:1 (resistance: susceptibility) suggesting that chlorsulfuron resistance in GL-1 is a single dominant trait. No mutations in the ALS gene were detected in the GL-1; however, a significant reduction in biomass accumulation was found in plants pre-treated with malathion indicating that metabolism of chlorsulfuron contributes to resistance in GL-1. Also, GL-1 is highly susceptible to other herbicides (e.g., mesotrione and tembotrione) compared to Pioneer 84G62, suggesting the existence of a negative cross-resistance in GL-1. Overall, these results confirm a high level of metabolic resistance to chlorsulfuron inherited by a single dominant gene in GL-1 sorghum. These results have potential for developing chlorsulfuron-tolerant sorghum hybrids, with the ability to improve post-emergence weed control.
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Affiliation(s)
| | | | - P V Vara Prasad
- Department of Agronomy, Kansas State University, Manhattan, KS, USA
- Sustainable Intensification Innovation Lab, Kansas State University, Manhattan, KS, USA
| | - Mithila Jugulam
- Department of Agronomy, Kansas State University, Manhattan, KS, USA.
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Yang X, Han H, Cao J, Li Y, Yu Q, Powles SB. Exploring quinclorac resistance mechanisms in Echinochloa crus-pavonis from China. PEST MANAGEMENT SCIENCE 2021; 77:194-201. [PMID: 32652760 DOI: 10.1002/ps.6007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/16/2020] [Accepted: 07/11/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Barnyardgrass (Echinochloa spp.) is a global weed in rice fields. Quinclorac is commonly used to control barnyardgrass. However, due to persistent use, quinclorac resistance has evolved. We obtained quinclorac-susceptible (QS) and -resistant (QR1, QR2) lines from the progeny of a single resistant E. crus-pavonis for a resistance mechanism study. RESULTS Line QR1 exhibited resistance to high quinclorac rates (up to 6400 g ha-1 ), whereas line QR2 exhibited a resistance/susceptibility segregation ratio of 3:1 at the field or lower rates (400, 100 g ha-1 ). Intriguingly, a lower level of 14 C-quinclorac metabolism and hence a higher level of 14 C-quinclorac translocation was observed in QR1 than QS plants. The basal expression levels of 1-aminocyclopropane-1-carboxylic acid (ACC) synthase (ACS) and ACC oxidase 2 (ACO2) genes did not differ significantly between the QR1 and QS lines. However, more expression of ACS and ACO genes was induced by quinclorac treatment in QS than in QR1. Basal levels of β-cyanoalanine synthase (β-CAS) gene expression were similar in QS and QR1 plants, but a greater level of down-regulation was detected in QS than in QR1 plants after quinclorac treatment. CONCLUSION These results indicate QR plants are less responsive to quinclorac than QS plants in terms of up-regulating quinclorac metabolism and ethylene synthesis. Resistance in this E. crus-pavonis line is likely controlled by a single major gene, involving possibly an alteration in auxin signal perception/transduction to the ethylene biosynthesis pathway. The β-CAS is unlikely to play a major role in quinclorac resistance in this particular population.
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Affiliation(s)
- Xia Yang
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- Australian Herbicide Resistance Initiative, School of Agriculture and Environment, University of Western Australia, Crawley, Australia
| | - Heping Han
- Australian Herbicide Resistance Initiative, School of Agriculture and Environment, University of Western Australia, Crawley, Australia
| | - Jingjing Cao
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Yongfeng Li
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- Agricultural Engineering Research Institute, Jiangsu University, Zhenjiang, China
| | - Qin Yu
- Australian Herbicide Resistance Initiative, School of Agriculture and Environment, University of Western Australia, Crawley, Australia
| | - Stephen B Powles
- Australian Herbicide Resistance Initiative, School of Agriculture and Environment, University of Western Australia, Crawley, Australia
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Kalaivani K, Maruthi-Kalaiselvi M, Senthil-Nathan S. Seed treatment and foliar application of methyl salicylate (MeSA) as a defense mechanism in rice plants against the pathogenic bacterium, Xanthomonas oryzae pv. oryzae. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 171:104718. [PMID: 33357540 DOI: 10.1016/j.pestbp.2020.104718] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 09/22/2020] [Accepted: 09/26/2020] [Indexed: 06/12/2023]
Abstract
Methyl salicylate (MeSA) is a volatile biological compound synthesized from salicylic acid (SA) and is a plant hormone that helps defend against pests and pathogens. A major bacterial pathogen of rice, Xanthomonas oryzae pv. oryzae (Xoo) causes severe disease. Seed and plant treatments with MeSA can stimulate the defense enzyme peroxidase (POD) in plants. Response of peroxidase activity in rice (Oryza sativa L) cultivars IR 20, IR 50, IR 64, ASD 16, ASD 19 and ADT 46 to MeSA were measured under greenhouse conditions. Treatments of rice seedlings with MeSA at 50 and 100 mg L-1 significantly upregulated POD expression in the plants. The activity of POD was also significantly upregulated when plants were inoculated with bacterial blight. Effects were stronger in ASD 16, ASD 19 and ADT 46 and were more pronounced in high dose treatment (100 mg L-1) when inoculated with bacterial blight condition and the effects were dose dependent, although the relationship between dose and rice varieties were not always linear. The pathogenic related (PR) protein bands at 33 kDa and 14 kDa were identified in treatments of 100 mg L-1 MeSA in the presence of bacterial blight disease. Band intensity was estimated to be twice that of those from pathogen induce MeSA levels in rice plants. These results suggest that treatment with MeSA can significantly increase the POD defense related enzyme by altering the plant physiology in ways that may be beneficial for crop protection.
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Affiliation(s)
- Kandasamy Kalaivani
- Post Graduate and Research Centre, Department of Zoology, Sri Parasakthi College for Women, Courtallam, 627 802 Tirunelveli, Tamil Nadu, India.
| | - Marimuthu Maruthi-Kalaiselvi
- Post Graduate and Research Centre, Department of Zoology, Sri Parasakthi College for Women, Courtallam, 627 802 Tirunelveli, Tamil Nadu, India
| | - Sengottayan Senthil-Nathan
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627 412 Tirunelveli, Tamil Nadu, India.
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Todd OE, Figueiredo MRA, Morran S, Soni N, Preston C, Kubeš MF, Napier R, Gaines TA. Synthetic auxin herbicides: finding the lock and key to weed resistance. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 300:110631. [PMID: 33180710 DOI: 10.1016/j.plantsci.2020.110631] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 07/17/2020] [Accepted: 08/03/2020] [Indexed: 06/11/2023]
Abstract
Synthetic auxin herbicides are designed to mimic indole-3-acetic acid (IAA), an integral plant hormone affecting cell growth, development, and tropism. In this review, we explore target site genes in the auxin signaling pathway including SCFTIR1/AFB, Aux/IAA, and ARFs that are confirmed or proposed mechanisms for weed resistance to synthetic auxin herbicides. Resistance to auxin herbicides by metabolism, either by enhanced cytochrome P450 detoxification or by loss of pro-herbicide activation, is a major non-target-site resistance pathway. We speculate about potential fitness costs of resistance due to effects of resistance-conferring mutations, provide insight into the role of polyploidy in synthetic auxin resistance evolution, and address the genetic resources available for weeds. This knowledge will be the key to unlock the long-standing questions as to which components of the auxin signaling pathway are most likely to have a role in resistance evolution. We propose that an ambitious research effort into synthetic auxin herbicide/target site interactions is needed to 1) explain why some synthetic auxin chemical families have activity on certain dicot plant families but not others and 2) fully elucidate target-site cross-resistance patterns among synthetic auxin chemical families to guide best practices for resistance management.
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Affiliation(s)
- Olivia E Todd
- Department of Agricultural Biology, 1177 Campus Delivery, Colorado State University, Fort Collins, CO 80525, USA.
| | - Marcelo R A Figueiredo
- Department of Agricultural Biology, 1177 Campus Delivery, Colorado State University, Fort Collins, CO 80525, USA.
| | - Sarah Morran
- Department of Agricultural Biology, 1177 Campus Delivery, Colorado State University, Fort Collins, CO 80525, USA.
| | - Neeta Soni
- Department of Agricultural Biology, 1177 Campus Delivery, Colorado State University, Fort Collins, CO 80525, USA.
| | - Christopher Preston
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5005, Australia.
| | - Martin F Kubeš
- School of Life Sciences, The University of Warwick, Coventry, CV4 7AL, UK.
| | - Richard Napier
- School of Life Sciences, The University of Warwick, Coventry, CV4 7AL, UK.
| | - Todd A Gaines
- Department of Agricultural Biology, 1177 Campus Delivery, Colorado State University, Fort Collins, CO 80525, USA.
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Cost-effective detection of genome-wide signatures for 2,4-D herbicide resistance adaptation in red clover. Sci Rep 2019; 9:20037. [PMID: 31882573 PMCID: PMC6934753 DOI: 10.1038/s41598-019-55676-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 11/26/2019] [Indexed: 12/04/2022] Open
Abstract
Herbicide resistance is a recurrent evolutionary event that has been reported across many species and for all major herbicide modes of action. The synthetic auxinic herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) has been widely used since the 1940s, however the genetic variation underlying naturally evolving resistance remains largely unknown. In this study, we used populations of the forage legume crop red clover (Trifolium pratense L.) that were recurrently selected for 2,4-D resistance to detect genome-wide signatures of adaptation. Four susceptible and six derived resistant populations were sequenced using a less costly approach by combining targeted sequencing (Capture-Seq) with pooled individuals (Pool-Seq). Genomic signatures of selection were identified using: (i) pairwise allele frequency differences; (ii) genome scan for overly differentiated loci; and (iii) genome‐wide association. Fifty significant SNPs were consistently detected, most located in a single chromosome, which can be useful for marker assisted selection. Additionally, we searched for candidate genes at these genomic regions to gain insights into potential molecular mechanisms underlying 2,4-D resistance. Among the predicted functions of candidate genes, we found some related to the auxin metabolism, response to oxidative stress, and detoxification, which are also promising for further functional validation studies.
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Long W, Malone J, Boutsalis P, Preston C. Diversity and extent of mutations endowing resistance to the acetolactate synthase (AHAS)-inhibiting herbicides in Indian hedge mustard (Sisymbrium orientale) populations in Australia. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 157:53-59. [PMID: 31153477 DOI: 10.1016/j.pestbp.2019.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 02/13/2019] [Accepted: 03/04/2019] [Indexed: 06/09/2023]
Abstract
Indian hedge mustard (Sisymbrium orientale) (IHM) is an important broadleaf weed across southern Australia. Resistance to sulfonylurea (SU) herbicides that inhibit acetohydroxyacid synthase (AHAS) is extensive in Australia, but resistance to imidazolinone (IMI) herbicides has only been reported recently. The AHAS-mutation profile of 65 IHM populations collected randomly from cropped fields was investigated to better understand the extent and types of resistance present. Resistance to SU herbicides was present in 40% of the populations and resistance to IMI herbicides in 11%. Mutations were identified in SoAHAS by sequence analysis, and included previously reported amino-acid substitutions at Pro197 and Trp574, but also new substitutions at Pro197 and Asp376 for this species. One population with possible non-target-site resistance was identified. Germination studies with fresh seed found no significant effect by mutations in SoAHAS on germination; however, population factors had a large effect on germination in S. orientale. Resistance to AHAS-inhibiting herbicides in populations of S. orientale is endowed by mutations in SoAHAS in all but one population examined. Mutations at Pro197 conferring resistance to SU herbicides were most common, while mutations at Trp574 that provide resistance to IMI herbicides are also present.
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Affiliation(s)
- Weihua Long
- Academy of Agriculture Sciences, The Institute of Industrial Crops, 50 Zhongling St, Nanjing, Jiangsu 210014, China; School of Agriculture, Food and Wine, the University of Adelaide, Glen Osmond, South Australia 5064, Australia
| | - Jenna Malone
- School of Agriculture, Food and Wine, the University of Adelaide, Glen Osmond, South Australia 5064, Australia
| | - Peter Boutsalis
- School of Agriculture, Food and Wine, the University of Adelaide, Glen Osmond, South Australia 5064, Australia
| | - Christopher Preston
- School of Agriculture, Food and Wine, the University of Adelaide, Glen Osmond, South Australia 5064, Australia.
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Dang HT, Malone JM, Gill G, Preston C. Cross-resistance to diflufenican and picolinafen and its inheritance in oriental mustard (Sisymbrium orientale L.). PEST MANAGEMENT SCIENCE 2019; 75:195-203. [PMID: 29799165 DOI: 10.1002/ps.5087] [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: 01/19/2018] [Revised: 05/05/2018] [Accepted: 05/18/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND An oriental mustard population (P40) was identified as resistant to diflufenican by screening at the field rate. As diflufenican and picolinafen both target phytoene desaturase (PDS), cross-resistance to picolinafen was suspected. The mechanism of resistance and its inheritance to diflufenican and picolinafen were investigated. RESULTS At the lethal dose (LD50 ) level, population P40 was 237-fold more resistant to diflufenican and seven-fold more resistant to picolinafen compared to two susceptible populations. Population P40 also had a significantly higher resistance to diflufenican (237-fold) than a previously described P3 population (143-fold). In addition to the Leu-498-Val mutation in PDS identified in all individuals of the P3 and P40 populations, a Glu-425-Asp mutation was also found in P40. Neither mutation was detected in any individuals of the susceptible population. As the segregation of phenotype and genotype of the F2 individuals fitted the model for a single dominant allele, resistance to both diflufenican and picolinafen is likely encoded on the nuclear genome and is dominant. CONCLUSION Resistance to diflufenican and picolinafen in the P40 population is likely conferred by Leu-498-Val and Glu-425-Asp mutations in the PDS gene. Inheritance of resistance to these herbicides is managed by a single dominant gene. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Hue T Dang
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Jenna M Malone
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Gurjeet Gill
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Christopher Preston
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
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Dang HT, Malone JM, Boutsalis P, Krishnan M, Gill G, Preston C. Reduced translocation in 2,4-D-resistant oriental mustard populations (Sisymbrium orientale L.) from Australia. PEST MANAGEMENT SCIENCE 2018; 74:1524-1532. [PMID: 29286550 DOI: 10.1002/ps.4845] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 12/15/2017] [Accepted: 12/21/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Two oriental mustard populations (P2 and P13) collected from Port Broughton, South Australia were identified as resistant to 2,4-D. The level of resistance, mechanism and the mode of inheritance for 2,4-D resistance in these populations were investigated. RESULTS Populations P2 and P13 were confirmed to be resistant to 2,4-D at the field rate (600 g a.e. ha-1 ). P2 and P13 were 81- and 67-fold more resistant than the susceptible populations (S1 and S2) at the dose required for 50% mortality (LD50 ), respectively. No predicted amino acid modification was detected in sequences of potential target-site genes (ABP, TIR1 and AFB5). Resistant populations had reduced 2,4-D translocation compared with the susceptible populations, with 77% of [14 C]2,4-D retained in the treated leaf versus 32% at 72 h after treatment. Resistance to 2,4-D is encoded on the nuclear genome and is dominant, as the response to 2,4-D of all F2 individuals were similar to the resistant biotypes. The segregation of F2 phenotypes fitted a 3: 1 (R: S) inheritance model. CONCLUSION Resistance to 2,4-D in oriental mustard is likely due to reduced translocation of 2,4-D out of the treated leaf. Inheritance of 2,4-D resistance is conferred by a single gene with a high level of dominance. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Hue Thi Dang
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Jenna M Malone
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Peter Boutsalis
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Mahima Krishnan
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Gurjeet Gill
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
| | - Christopher Preston
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, Australia
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Dang HT, Malone JM, Boutsalis P, Gill G, Preston C. The mechanism of diflufenican resistance and its inheritance in oriental mustard (Sisymbrium orientale L.) from Australia. PEST MANAGEMENT SCIENCE 2018; 74:1279-1285. [PMID: 29330913 DOI: 10.1002/ps.4858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 12/22/2017] [Accepted: 01/09/2018] [Indexed: 05/28/2023]
Abstract
BACKGROUND An oriental mustard population (P3) collected near Quambatook, Victoria was identified as being resistant to diflufenican by screening with the field rate (200 g a.i. ha-1 ) of the herbicide. The mechanism(s) of diflufenican resistance and its inheritance in this population were therefore investigated. RESULTS Dose-response experiments confirmed that population P3 was 140-fold more resistant to diflufenican than susceptible populations, as determined by the comparison of 50% lethal (LD50 ) values. The phytoene desaturase (PDS) gene from five individuals each of the S1 [susceptible (S)] and P3 [resistant (R)] populations was sequenced, and a substitution of valine for leucine at position 526 (Leu-526-Val) was detected in all five individuals of P3, but not in the S1 population. Inheritance studies showed that diflufenican resistance is encoded in the nuclear genome and is dominant, as the response to diflufenican at 200 g a.i. ha-1 of F1 families was equivalent to that of the resistant biotype. The segregation of F2 phenotypes fitted a 3:1 inheritance model. Segregation of 42 F2 individuals by genotype sequencing fitted a 1:2:1 (ss:Rs:RR) ratio. CONCLUSION Resistance to diflufenican in oriental mustard is conferred by the Leu-526-Val mutation in the PDS gene. Inheritance of resistance is managed by a single gene with high levels of dominance. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Hue Thi Dang
- School of Agriculture, Food and Wine, University of Adelaide, PMB1, Glen Osmond, South Australia, Australia
| | - Jenna Moira Malone
- School of Agriculture, Food and Wine, University of Adelaide, PMB1, Glen Osmond, South Australia, Australia
| | - Peter Boutsalis
- School of Agriculture, Food and Wine, University of Adelaide, PMB1, Glen Osmond, South Australia, Australia
| | - Gurjeet Gill
- School of Agriculture, Food and Wine, University of Adelaide, PMB1, Glen Osmond, South Australia, Australia
| | - Christopher Preston
- School of Agriculture, Food and Wine, University of Adelaide, PMB1, Glen Osmond, South Australia, Australia
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Cross-resistance to dicamba, 2,4-D, and fluroxypyr in Kochia scoparia is endowed by a mutation in an AUX/IAA gene. Proc Natl Acad Sci U S A 2018. [PMID: 29531066 DOI: 10.1073/pnas.1712372115] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The understanding and mitigation of the appearance of herbicide-resistant weeds have come to the forefront of study in the past decade, as the number of weed species that are resistant to one or more herbicide modes of action is on the increase. Historically, weed resistance to auxin herbicides has been rare, but examples, such as Kochia scoparia L. Schrad (kochia), have appeared, posing a challenge to conventional agricultural practices. Reports of dicamba-resistant kochia populations began in the early 1990s in areas where auxin herbicides were heavily utilized for weed control in corn and wheat cropping systems, and some biotypes are resistant to other auxin herbicides as well. We have further characterized the auxin responses of one previously reported dicamba-resistant biotype isolated from western Nebraska and found that it is additionally cross-resistant to other auxin herbicides, including 2,4-dichlorophenoxyacetic acid (2,4-D) and fluroxypyr. We have utilized transcriptome sequencing and comparison to identify a 2-nt base change in this biotype, which results in a glycine to asparagine amino acid change within a highly conserved region of an AUX/indole-3-acetic acid (IAA) protein, KsIAA16. Through yeast two-hybrid analysis, characterization of F2 segregation, and heterologous expression and characterization of the gene in Arabidopsis thaliana, we show that that the single dominant KsIAA16R resistance allele is the causal basis for dicamba resistance in this population. Furthermore, we report the development of a molecular marker to identify this allele in populations and facilitate inheritance studies. We also report that the resistance allele confers a fitness penalty in greenhouse studies.
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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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Busi R, Gaines TA, Powles S. Phorate can reverse P450 metabolism-based herbicide resistance in Lolium rigidum. PEST MANAGEMENT SCIENCE 2017; 73:410-417. [PMID: 27643926 DOI: 10.1002/ps.4441] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 09/10/2016] [Accepted: 09/13/2016] [Indexed: 05/11/2023]
Abstract
BACKGROUND Organophosphate insecticides can inhibit specific cytochrome P450 enzymes involved in metabolic herbicide resistance mechanisms, leading to synergistic interactions between the insecticide and the herbicide. In this study we report synergistic versus antagonistic interactions between the organophosphate insecticide phorate and five different herbicides observed in a population of multiple herbicide-resistant Lolium rigidum. RESULTS Phorate synergised with three different herbicide modes of action, enhancing the activity of the ALS inhibitor chlorsulfuron (60% LD50 reduction), the VLCFAE inhibitor pyroxasulfone (45% LD50 reduction) and the mitosis inhibitor trifluralin (70% LD50 reduction). Conversely, phorate antagonised the two thiocarbamate herbicides prosulfocarb and triallate with a 12-fold LD50 increase. CONCLUSION We report the selective reversal of P450-mediated metabolic multiple resistance to chlorsulfuron and trifluralin in the grass weed L. rigidum by synergistic interaction with the insecticide phorate, and discuss the putative mechanistic basis. This research should encourage diversity in herbicide use patterns for weed control as part of a long-term integrated management effort to reduce the risk of selection of metabolism-based multiple herbicide resistance in L. rigidum. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Roberto Busi
- Australian Herbicide Resistance Initiative, School of Plant Biology, University of Western Australia, Perth, WA, Australia
| | - Todd Adam Gaines
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| | - Stephen Powles
- Australian Herbicide Resistance Initiative, School of Plant Biology, University of Western Australia, Perth, WA, Australia
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Goggin DE, Cawthray GR, Powles SB. 2,4-D resistance in wild radish: reduced herbicide translocation via inhibition of cellular transport. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:3223-35. [PMID: 26994475 PMCID: PMC4892717 DOI: 10.1093/jxb/erw120] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Resistance to auxinic herbicides is increasing in a range of dicotyledonous weed species, but in most cases the biochemical mechanism of resistance is unknown. Using (14)C-labelled herbicide, the mechanism of resistance to 2,4-dichlorophenoxyacetic acid (2,4-D) in two wild radish (Raphanus raphanistrum L.) populations was identified as an inability to translocate 2,4-D out of the treated leaf. Although 2,4-D was metabolized in wild radish, and in a different manner to the well-characterized crop species wheat and bean, there was no difference in metabolism between the susceptible and resistant populations. Reduced translocation of 2,4-D in the latter was also not due to sequestration of the herbicide, or to reduced uptake by the leaf epidermis or mesophyll cells. Application of auxin efflux or ABCB transporter inhibitors to 2,4-D-susceptible plants caused a mimicking of the reduced-translocation resistance phenotype, suggesting that 2,4-D resistance in the populations under investigation could be due to an alteration in the activity of a plasma membrane ABCB-type auxin transporter responsible for facilitating long-distance transport of 2,4-D.
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Affiliation(s)
- Danica E Goggin
- Australian Herbicide Resistance Initiative, University of Western Australia, 35 Stirling Highway, Crawley 6009, Australia School of Plant Biology, University of Western Australia, 35 Stirling Highway, Crawley 6009, Australia
| | - Gregory R Cawthray
- School of Plant Biology, University of Western Australia, 35 Stirling Highway, Crawley 6009, Australia
| | - Stephen B Powles
- Australian Herbicide Resistance Initiative, University of Western Australia, 35 Stirling Highway, Crawley 6009, Australia School of Plant Biology, University of Western Australia, 35 Stirling Highway, Crawley 6009, Australia
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