51
|
Breccia G, Gianotto L, Altieri E, Bulos M, Nestares G. Effect of Ahasl1-1 and Ahasl1-4 alleles on herbicide resistance and its associated dominance in sunflower. PEST MANAGEMENT SCIENCE 2019; 75:935-941. [PMID: 30187639 DOI: 10.1002/ps.5197] [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: 06/29/2018] [Revised: 08/27/2018] [Accepted: 08/29/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Acetohydroxyacid synthase large subunit 1 (Ahasl1) is a multiallelic locus involved in herbicide resistance in sunflower. Ahasl1-1 and Ahasl1-4 alleles harbor different point mutations that lead to different amino acid substitutions (Ala205Val and Trp574Leu, respectively). The objectives of this work were to evaluate the effect of these alleles at the enzymatic and whole-plant levels, and to determine the dominance relationships for imazapyr and metsulfuron-methyl herbicides. RESULTS Resistant near-isogenic lines showed significantly lower specific AHAS activity than susceptible near-isoline. However, kinetic studies indicated that mutations did not change AHAS pyruvate affinity. Dose-response for six near-isolines carrying different combinations of Ahasl1-1 and Ahasl1-4 alleles and two herbicides (imazapyr and metsulfuron-methyl) were evaluated at whole-plant and enzymatic levels. Ahasl1-1 allele conferred moderate resistance to imazapyr and low resistance to metsulfuron-methyl. Conversely, Ahasl1-4 allele endowed high levels of resistance for both herbicides. Dominance of resistance at whole-plant level showed a semi-dominant behavior among the alleles for both herbicides. CONCLUSION Ahasl1-4 allele confers higher resistance levels than Ahasl1-1 when evaluated with imazapyr and metsulfuron-methyl. Dominance estimations suggested that both parental lines should carry a resistance trait when developing hybrids. © 2018 Society of Chemical Industry.
Collapse
Affiliation(s)
- Gabriela Breccia
- IICAR, UNR, CONICET, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Santa Fe, Argentina
- Cátedra de Genética, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Santa Fe, Argentina
| | - Laura Gianotto
- Cátedra de Genética, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Santa Fe, Argentina
| | | | - Mariano Bulos
- Department of Biotechnology, Nidera S.A., Santa Fe, Argentina
| | - Graciela Nestares
- IICAR, UNR, CONICET, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Santa Fe, Argentina
- Cátedra de Genética, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Santa Fe, Argentina
| |
Collapse
|
52
|
Wang H, Zhang L, Li W, Bai S, Zhang X, Wu C, Liu W, Wang J. Isolation and expression of acetolactate synthase genes that have a rare mutation in shepherd's purse (Capsella bursa-pastoris (L.) Medik.). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 155:119-125. [PMID: 30857621 DOI: 10.1016/j.pestbp.2019.01.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 01/25/2019] [Accepted: 01/28/2019] [Indexed: 06/09/2023]
Abstract
Acetolactate synthase (ALS) inhibitor-resistant biotypes are the fastest growing class of herbicide-resistant weeds. Shepherd's purse (Capsella bursa-pastoris (L.) Medik.), a tetraploid species and one of the most troublesome weeds in wheat production, has evolved ALS inhibitor resistance. To confirm and characterize the resistance of shepherd's purse populations to ALS-inhibiting herbicides, whole-plant bioassays were conducted. To investigate the molecular basis of resistance in shepherd's purse, the ALS gene was sequenced and compared between susceptible (S) and resistant (R) biotypes. Two partial intronless ALS genes (ALS-1 and ALS-2) were identified, and two heterozygous mutations (CCT to TCT in ALS-1 and CCT to CAT in ALS-2) at position 197 (Pro197Ser and Pro197His) providing resistance were simultaneously found in a single plant in a resistant population. Our results confirmed that the resistant shepherd's purse population showed high-level resistance to tribenuron-methyl (RI = 59.8), pyroxsulam (RI = 38.7) and flucarbazone-Na (RI = 88.0). Quantitative reverse transcription-polymerase chain reaction (RT-qPCR) results suggested that the difference in ALS gene expression was small between S and R populations, which may be insufficient to cause herbicide resistance, and according to the results of in vitro ALS activity, insensitivity of ALS may be the main mechanism of high resistance to tribenuron-methyl in resistant populations.
Collapse
Affiliation(s)
- Hengzhi Wang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Lele Zhang
- Administration Bureau of the Yellow River Delta National Nature Reserve, Dongying 257091, Shandong, PR China
| | - Wei Li
- Zaozhuang University, Zaozhuang 277100, Shandong, PR China
| | - Shuang Bai
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Xiaolin Zhang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Cuixia Wu
- Tai'an Academy of Agricultural Sciences, Tai'an 271000, Shandong, PR China
| | - Weitang Liu
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Jinxin Wang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, PR China.
| |
Collapse
|
53
|
Du L, Qu M, Jiang X, Li X, Ju Q, Lu X, Wang J. Fitness costs associated with acetyl-coenzyme A carboxylase mutations endowing herbicide resistance in American sloughgrass ( Beckmannia syzigachne Steud.). Ecol Evol 2019; 9:2220-2230. [PMID: 30847106 PMCID: PMC6392401 DOI: 10.1002/ece3.4917] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 11/27/2018] [Accepted: 12/28/2018] [Indexed: 01/07/2023] Open
Abstract
Weed resistance to herbicide can be conferred by gene mutations, and some mutations can cause pleiotropic effects in some cases. We investigated the pleiotropic effects associated with five specific ACCase mutations (Ile1781Leu, Trp2027Cys, Ile2041Asn, Asp2078Gly, and Gly2096Ala) on the plant growth, seed production, and resource competitiveness in American sloughgrass.Resistant plants (M/M) homozygous for specific ACCase mutation and susceptible wild-type plants (W/W) were derived from single heterozygous mother plant (M/W) by genotyping. Plant growth assay and neighborhood experiments were performed to quantify variation between M/M plants and W/W plants.The Ile1781Leu mutation resulted in slight increases in plant growth in pure stands and improved resource competitiveness under low-competition conditions in pot experiments, but no clear variation was observed under high competitive pressure or field conditions. During competition with wheat plants under field conditions, American sloughgrass plants containing Ile2041Asn ACCase exhibited a significantly lower (12.5%) aboveground biomass but no distinct differences in seed production or resource competitiveness. No significant detrimental pleiotropic effects associated with Gly2096Ala were detected in American sloughgrass.The Trp2027Cys mutation distinctly reduced seed production, especially under high competitive pressure, but did not significantly alter plant growth. The Asp2078Gly mutation consistently reduced not only plant growth and seed production but also resource competitiveness. Synthesis. The Trp2027Cys and Asp2078Gly mutations led to significant fitness costs, which may reduce the frequency of resistance alleles and reduce the propagation speed of resistant weeds in the absence of ACCase inhibitor herbicides. The Ile1781Leu, Ile2041Asn, and Gly2096Ala mutations displayed no obvious fitness costs or displayed very small fitness penalties, which would likely have no effect on the establishment of resistant weeds in the field.
Collapse
Affiliation(s)
- Long Du
- Pest Bio‐control LabShandong Peanut Research InstituteQingdaoChina
| | - Mingjing Qu
- Pest Bio‐control LabShandong Peanut Research InstituteQingdaoChina
| | - Xiaojing Jiang
- Pest Bio‐control LabShandong Peanut Research InstituteQingdaoChina
| | - Xiao Li
- Pest Bio‐control LabShandong Peanut Research InstituteQingdaoChina
| | - Qian Ju
- Pest Bio‐control LabShandong Peanut Research InstituteQingdaoChina
| | - Xingtao Lu
- Institute of Plant ProtectionTai'an Academy of Agricultural SciencesTai'anChina
| | - Jinxin Wang
- College of Plant ProtectionShandong Agricultural UniversityTai'anChina
| |
Collapse
|
54
|
Veillet F, Perrot L, Chauvin L, Kermarrec MP, Guyon-Debast A, Chauvin JE, Nogué F, Mazier M. Transgene-Free Genome Editing in Tomato and Potato Plants Using Agrobacterium-Mediated Delivery of a CRISPR/Cas9 Cytidine Base Editor. Int J Mol Sci 2019. [PMID: 30669298 DOI: 10.2290/ijms20020402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/15/2023] Open
Abstract
Genome editing tools have rapidly been adopted by plant scientists for gene function discovery and crop improvement. The current technical challenge is to efficiently induce precise and predictable targeted point mutations valuable for crop breeding purposes. Cytidine base editors (CBEs) are CRISPR/Cas9 derived tools recently developed to direct a C-to-T base conversion. Stable genomic integration of CRISPR/Cas9 components through Agrobacterium-mediated transformation is the most widely used approach in dicotyledonous plants. However, elimination of foreign DNA may be difficult to achieve, especially in vegetatively propagated plants. In this study, we targeted the acetolactate synthase (ALS) gene in tomato and potato by a CBE using Agrobacterium-mediated transformation. We successfully and efficiently edited the targeted cytidine bases, leading to chlorsulfuron-resistant plants with precise base edition efficiency up to 71% in tomato. More importantly, we produced 12.9% and 10% edited but transgene-free plants in the first generation in tomato and potato, respectively. Such an approach is expected to decrease deleterious effects due to the random integration of transgene(s) into the host genome. Our successful approach opens up new perspectives for genome engineering by the co-edition of the ALS with other gene(s), leading to transgene-free plants harboring new traits of interest.
Collapse
Affiliation(s)
- Florian Veillet
- INRA, Agrocampus Ouest, Université Rennes 1, UMR 1349 IGEPP, Domaine de Kéraïber, 29260 Ploudaniel, France.
| | - Laura Perrot
- INRA PACA, UR 1052, GAFL unit (Génétique et Amélioration des Fruits et Légumes), 84143 Montfavet, France.
| | - Laura Chauvin
- INRA, Agrocampus Ouest, Université Rennes 1, UMR 1349 IGEPP, Domaine de Kéraïber, 29260 Ploudaniel, France.
| | - Marie-Paule Kermarrec
- INRA, Agrocampus Ouest, Université Rennes 1, UMR 1349 IGEPP, Domaine de Kéraïber, 29260 Ploudaniel, France.
| | - Anouchka Guyon-Debast
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000 Versailles, France.
| | - Jean-Eric Chauvin
- INRA, Agrocampus Ouest, Université Rennes 1, UMR 1349 IGEPP, Domaine de Kéraïber, 29260 Ploudaniel, France.
| | - Fabien Nogué
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000 Versailles, France.
| | - Marianne Mazier
- INRA PACA, UR 1052, GAFL unit (Génétique et Amélioration des Fruits et Légumes), 84143 Montfavet, France.
| |
Collapse
|
55
|
Veillet F, Perrot L, Chauvin L, Kermarrec MP, Guyon-Debast A, Chauvin JE, Nogué F, Mazier M. Transgene-Free Genome Editing in Tomato and Potato Plants Using Agrobacterium-Mediated Delivery of a CRISPR/Cas9 Cytidine Base Editor. Int J Mol Sci 2019; 20:E402. [PMID: 30669298 PMCID: PMC6358797 DOI: 10.3390/ijms20020402] [Citation(s) in RCA: 161] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 01/14/2019] [Accepted: 01/16/2019] [Indexed: 01/13/2023] Open
Abstract
Genome editing tools have rapidly been adopted by plant scientists for gene function discovery and crop improvement. The current technical challenge is to efficiently induce precise and predictable targeted point mutations valuable for crop breeding purposes. Cytidine base editors (CBEs) are CRISPR/Cas9 derived tools recently developed to direct a C-to-T base conversion. Stable genomic integration of CRISPR/Cas9 components through Agrobacterium-mediated transformation is the most widely used approach in dicotyledonous plants. However, elimination of foreign DNA may be difficult to achieve, especially in vegetatively propagated plants. In this study, we targeted the acetolactate synthase (ALS) gene in tomato and potato by a CBE using Agrobacterium-mediated transformation. We successfully and efficiently edited the targeted cytidine bases, leading to chlorsulfuron-resistant plants with precise base edition efficiency up to 71% in tomato. More importantly, we produced 12.9% and 10% edited but transgene-free plants in the first generation in tomato and potato, respectively. Such an approach is expected to decrease deleterious effects due to the random integration of transgene(s) into the host genome. Our successful approach opens up new perspectives for genome engineering by the co-edition of the ALS with other gene(s), leading to transgene-free plants harboring new traits of interest.
Collapse
Affiliation(s)
- Florian Veillet
- INRA, Agrocampus Ouest, Université Rennes 1, UMR 1349 IGEPP, Domaine de Kéraïber, 29260 Ploudaniel, France.
| | - Laura Perrot
- INRA PACA, UR 1052, GAFL unit (Génétique et Amélioration des Fruits et Légumes), 84143 Montfavet, France.
| | - Laura Chauvin
- INRA, Agrocampus Ouest, Université Rennes 1, UMR 1349 IGEPP, Domaine de Kéraïber, 29260 Ploudaniel, France.
| | - Marie-Paule Kermarrec
- INRA, Agrocampus Ouest, Université Rennes 1, UMR 1349 IGEPP, Domaine de Kéraïber, 29260 Ploudaniel, France.
| | - Anouchka Guyon-Debast
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000 Versailles, France.
| | - Jean-Eric Chauvin
- INRA, Agrocampus Ouest, Université Rennes 1, UMR 1349 IGEPP, Domaine de Kéraïber, 29260 Ploudaniel, France.
| | - Fabien Nogué
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000 Versailles, France.
| | - Marianne Mazier
- INRA PACA, UR 1052, GAFL unit (Génétique et Amélioration des Fruits et Légumes), 84143 Montfavet, France.
| |
Collapse
|
56
|
Comont D, Knight C, Crook L, Hull R, Beffa R, Neve P. Alterations in Life-History Associated With Non-target-site Herbicide Resistance in Alopecurus myosuroides. FRONTIERS IN PLANT SCIENCE 2019; 10:837. [PMID: 31297127 PMCID: PMC6607922 DOI: 10.3389/fpls.2019.00837] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 06/12/2019] [Indexed: 05/22/2023]
Abstract
The evolution of resistance to herbicides is a classic example of rapid contemporary adaptation in the face of a novel environmental stress. Evolutionary theory predicts that selection for resistance will be accompanied by fitness trade-offs in environments where the stress is absent. Alopecurus myosuroides, an autumn-germinating grass weed of cereal crops in North-West Europe, has evolved resistance to seven herbicide modes-of-action, making this an ideal species to examine the presence and magnitudes of such fitness costs. Here, we use two contrasting A. myosuroides phenotypes derived from a common genetic background, one with enhanced metabolism resistance to a commercial formulation of the sulfonylurea (ALS) actives mesosulfuron and iodosulfuron, and the other with susceptibility to these actives (S). Comparisons of plant establishment, growth, and reproductive potential were made under conditions of intraspecific competition, interspecific competition with wheat, and over a gradient of nitrogen deprivation. Herbicide dose response assays confirmed that the two lines had contrasting resistance phenotypes, with a 20-fold difference in resistance between them. Pleiotropic effects of resistance were observed during plant development, with R plants having a greater intraspecific competitive effect and longer tiller lengths than S plants during vegetative growth, but with S plants allocating proportionally more biomass to reproductive tissues during flowering. Direct evidence of a reproductive cost of resistance was evident in the nitrogen deprivation experiment with R plants producing 27% fewer seed heads per plant, and a corresponding 23% reduction in total seed head length. However, these direct effects of resistance on fecundity were not consistent across experiments. Our results demonstrate that a resistance phenotype based on enhanced herbicide metabolism has pleiotropic impacts on plant growth, development and resource partitioning but does not support the hypothesis that resistance is associated with a consistent reproductive fitness cost in this species. Given the continued difficulties associated with unequivocally detecting costs of herbicide resistance, we advocate future studies that adopt classical evolutionary quantitative genetics approaches to determine genetic correlations between resistance and fitness-related plant life history traits.
Collapse
Affiliation(s)
- David Comont
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
- *Correspondence: David Comont,
| | - Craig Knight
- School of Life Sciences, University of Warwick, Wellesbourne, United Kingdom
| | - Laura Crook
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| | - Richard Hull
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| | - Roland Beffa
- Bayer AG, CropScience Division, Frankfurt, Germany
| | - Paul Neve
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| |
Collapse
|
57
|
Luo XW, Zhang DY, Zhu TH, Zhou XG, Peng J, Zhang SB, Liu Y. Adaptation mechanism and tolerance of Rhodopseudomonas palustris PSB-S under pyrazosulfuron-ethyl stress. BMC Microbiol 2018; 18:207. [PMID: 30526497 PMCID: PMC6286529 DOI: 10.1186/s12866-018-1361-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Accepted: 11/29/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pyrazosulfuron-ethyl is a long lasting herbicide in the agro-ecosystem and its residue is toxic to crops and other non-target organisms. A better understanding of molecular basis in pyrazosulfuron-ethyl tolerant organisms will shed light on the adaptive mechanisms to this herbicide. RESULTS Pyrazosulfuron-ethyl inhibited biomass production in Rhodopseudomonas palustris PSB-S, altered cell morphology, suppressed flagella formation, and reduced pigment biosynthesis through significant suppression of carotenoids biosynthesis. A total of 1127 protein spots were detected in the two-dimensional gel electrophoresis. Among them, 72 spots representing 56 different proteins were found to be differently expressed using MALDI-TOF/TOF-MS, including 26 up- and 30 down-regulated proteins in the pyrazosulfuron-ethyl-treated PSB-S cells. The up-regulated proteins were involved predominantly in oxidative stress or energy generation pathways, while most of the down-regulated proteins were involved in the biomass biosynthesis pathway. The protein expression profiles suggested that the elongation factor G, cell division protein FtsZ, and proteins associated with the ABC transporters were crucial for R. palustris PSB-S tolerance against pyrazosulfuron-ethyl. CONCLUSION Up-regulated proteins, including elongation factor G, cell division FtsZ, ATP synthase, and superoxide dismutase, and down-regulated proteins, including ALS III and ABC transporters, as well as some unknown proteins might play roles in R. palustris PSB-S adaptation to pyrazosulfuron-ethyl induced stresses. Functional validations of these candidate proteins should help to develope transgenic crops resistant to pyrazosulfuron-ethyl.
Collapse
Affiliation(s)
- Xiang-Wen Luo
- Key laboratory of pest management of horticultural crop of Hunan province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, No 726 Second Yuanda Road, Furong District, Changsha, 410125, Hunan province, People's Republic of China.,Plant Protection College, Hunan Agricultural University, Changsha, 410128, China
| | - De-Yang Zhang
- Key laboratory of pest management of horticultural crop of Hunan province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, No 726 Second Yuanda Road, Furong District, Changsha, 410125, Hunan province, People's Republic of China.,Plant Protection College, Hunan Agricultural University, Changsha, 410128, China
| | - Teng-Hui Zhu
- Plant Protection College, Hunan Agricultural University, Changsha, 410128, China
| | - Xu-Guo Zhou
- Department of Entomology, University of Kentucky, Lexington, KY, 40546, USA
| | - Jing Peng
- Key laboratory of pest management of horticultural crop of Hunan province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, No 726 Second Yuanda Road, Furong District, Changsha, 410125, Hunan province, People's Republic of China.,Plant Protection College, Hunan Agricultural University, Changsha, 410128, China
| | - Song-Bai Zhang
- Key laboratory of pest management of horticultural crop of Hunan province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, No 726 Second Yuanda Road, Furong District, Changsha, 410125, Hunan province, People's Republic of China.
| | - Yong Liu
- Key laboratory of pest management of horticultural crop of Hunan province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, No 726 Second Yuanda Road, Furong District, Changsha, 410125, Hunan province, People's Republic of China. .,Plant Protection College, Hunan Agricultural University, Changsha, 410128, China.
| |
Collapse
|
58
|
Liu W, Bai S, Zhao N, Jia S, Li W, Zhang L, Wang J. Non-target site-based resistance to tribenuron-methyl and essential involved genes in Myosoton aquaticum (L.). BMC PLANT BIOLOGY 2018; 18:225. [PMID: 30305027 PMCID: PMC6180388 DOI: 10.1186/s12870-018-1451-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 09/27/2018] [Indexed: 05/30/2023]
Abstract
BACKGROUND Water chickweed (Myosoton aquaticum (L.)) is a dicot broadleaf weed that is widespread in winter fields in China, and has evolved serious resistance to acetolactate synthase (ALS) inhibiting herbicides. RESULTS We identified a M. aquaticum population exhibiting moderate (6.15-fold) resistance to tribenuron-methyl (TM). Target-site ALS gene sequencing revealed no known resistance mutations in these plants, and the in vitro ALS activity assays showed no differences in enzyme sensitivity between susceptible and resistant populations; however, resistance was reversed by pretreatment with the cytochrome P450 (CYP) monooxygenase inhibitor malathion. An RNA sequencing transcriptome analysis was performed to identify candidate genes involved in metabolic resistance, and the unigenes obtained by de novo transcriptome assembly were annotated across seven databases. In total, 34 differentially expressed genes selected by digital gene expression analysis were validated by quantitative real-time (qRT)-PCR. Ten consistently overexpressed contigs, including four for CYP, four for ATP-binding cassette (ABC) transporter, and two for peroxidase were further validated by qRT-PCR using additional plants from resistant and susceptible populations. Three CYP genes (with homology to CYP734A1, CYP76C1, and CYP86B1) and one ABC transporter gene (with homology to ABCC10) were highly expressed in all resistant plants. CONCLUSION The mechanism of TM resistance in M. aquaticum is controlled by NTSR rather than TSR. Four genes, CYP734A1, CYP76C1, CYP86B1, and ABCC10 could play essential role in metabolic resistance to TM and justify further functional studies. To our knowledge, this is the first large-scale transcriptome analysis of genes associated with NTSR in M. aquaticum using the Illumina platform. Our data provide resource for M. aquaticum biology, and will facilitate the study of herbicide resistance mechanism at the molecular level in this species as well as in other weeds.
Collapse
Affiliation(s)
- Weitang Liu
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Taian, 271018 Shandong China
| | - Shuang Bai
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Taian, 271018 Shandong China
| | - Ning Zhao
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Taian, 271018 Shandong China
| | - Sisi Jia
- Taian Customs, Taian, 271000 Shandong China
| | - Wei Li
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Taian, 271018 Shandong China
| | - Lele Zhang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Taian, 271018 Shandong China
| | - Jinxin Wang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Taian, 271018 Shandong China
| |
Collapse
|
59
|
Fartyal D, Agarwal A, James D, Borphukan B, Ram B, Sheri V, Agrawal PK, Achary VMM, Reddy MK. Developing dual herbicide tolerant transgenic rice plants for sustainable weed management. Sci Rep 2018; 8:11598. [PMID: 30072810 PMCID: PMC6072789 DOI: 10.1038/s41598-018-29554-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 07/14/2018] [Indexed: 11/25/2022] Open
Abstract
Herbicides are important constituents of modern integrated weed management system. However, the continuous use of a single herbicide leads to the frequent evolution of resistant weeds which further challenges their management. To overcome this situation, alternating use of multiple herbicides along with conventional weed-management practices is suitable and recommended. The development of multiple herbicide-tolerant crops is still in its infancy, and only a few crops with herbicide tolerance traits have been reported and commercialized. In this study, we developed transgenic rice plants that were tolerant to both bensulfuron methyl (BM) and glufosinate herbicides. The herbicide tolerant mutant variant of rice AHAS (Acetohydroxyacid synthase) was overexpressed along with codon optimized bacterial bar gene. The developed transgenic lines showed significant tolerance to both herbicides at various stages of plant development. The selected transgenic lines displayed an increased tolerance against 100 μM BM and 30 mg/L phosphinothricin during seed germination stage. Foliar applications further confirmed the dual tolerance to 300 μM BM and 2% basta herbicides without any significant growth and yield penalties. The development of dual-herbicide-tolerant transgenic plants adds further information to the knowledge of crop herbicide tolerance for sustainable weed management in modern agricultural system.
Collapse
Affiliation(s)
- Dhirendra Fartyal
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.,Uttarakhand Technical University, Dehradun, Uttarakhand, India
| | - Aakrati Agarwal
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.,Plant Molecular Biology Lab, Department of Botany, University of Delhi, New Delhi, India
| | - Donald James
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Bhabesh Borphukan
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Babu Ram
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.,Uttarakhand Technical University, Dehradun, Uttarakhand, India
| | - Vijay Sheri
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Pawan K Agrawal
- National Agricultural Science Fund, Indian Council of Agricultural Research, New Delhi, India
| | - V Mohan Murali Achary
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
| | - M K Reddy
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
| |
Collapse
|
60
|
Yang Q, Deng W, Wang S, Liu H, Li X, Zheng M. Effects of resistance mutations of Pro197, Asp376 and Trp574 on the characteristics of acetohydroxyacid synthase (AHAS) isozymes. PEST MANAGEMENT SCIENCE 2018; 74:1870-1879. [PMID: 29424952 DOI: 10.1002/ps.4889] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/09/2018] [Accepted: 02/04/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Descurainia sophia L., a problematic weed in winter wheat fields in China, has developed high resistance to tribenuron-methyl. Amino acid substitutions at sites Pro197, Asp376 and Trp574 in the target acetohydroxyacid synthase (AHAS) were primarily responsible for D. sophia resistance to tribenuron-methyl. In this study, purified subpopulations of D. sophia plants individually homozygous for a specific resistance mutation (Pro197Leu, Pro197His, Pro197Ser, Pro197Thr, Asp376Glu or Trp574Leu) in AHAS were generated, and the effects of resistance mutations on D. sophia resistance and AHAS characteristics were investigated. RESULTS All resistance mutations in this study not only caused D. sophia to evolve 152- to 811-fold resistance to tribenuron-methyl but also greatly reduced AHAS sensitivity to tribenuron-methyl and increased AHAS binding affinity for the substrate pyruvate, which was primarily responsible for D. sophia resistance. The molecular docking results indicated that these resistance mutations altered AHAS binding affinity for tribenuron-methyl by reducing the hydrogen bonds and changing hydrophobic interactions. Compared with the wild-type AHAS, these resistance mutations exhibited no significant effects on AHAS feedback inhibition by branched-chain amino acids (BCAAs) at concentrations <0.08 mm. The altered AHAS sensitivity to feedback inhibition by BCAAs did not necessarily increase or decrease the free BCAAs in resistant D. sophia plants. CONCLUSION The AHAS resistance mutations conferred D. sophia resistance to tribenuron-methyl by decreasing the binding affinity for tribenuron-methyl and/or increasing the binding affinity for pyruvate, but the mutations did not necessarily affect the biosynthesis of BCAAs in plants. © 2018 Society of Chemical Industry.
Collapse
Affiliation(s)
- Qian Yang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Wei Deng
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Shipeng Wang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Hongjie Liu
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Xuefeng Li
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China
| | - Mingqi Zheng
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China
| |
Collapse
|
61
|
Vercellino RB, Pandolfo CE, Breccia G, Cantamutto M, Presotto A. AHAS Trp574Leu substitution in Raphanus sativus L.: screening, enzyme activity and fitness cost. PEST MANAGEMENT SCIENCE 2018; 74:1600-1607. [PMID: 29314549 DOI: 10.1002/ps.4849] [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: 08/07/2017] [Revised: 10/10/2017] [Accepted: 12/22/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Feral radish (Raphanus sativus L.) is a problematic weed that has become resistant to acetohydroxyacid synthase (AHAS) inhibitor herbicides due to the Trp574Leu mutation. An AHAS gene mutation that causes herbicide resistance may have negative pleiotropic effects on plant fitness. This study reports the effects of the Trp574Leu mutation on AHAS activity and reproductive traits of R. sativus. RESULTS Eight of 17 feral radish accessions presented individuals resistant to metsulfuron-methyl at 0.5% to >90.0% and all the resistant individuals analyzed showed the Trp574Leu mutation. Without herbicide selection, the AHAS activity was 3.2-fold higher in the susceptible accession than in the resistant one. The resistant accession was >9000-fold more resistant to metsulfuron-methyl and imazethapyr than the susceptible accession. Under low intraspecific competition during two growing seasons, AHAS-resistant feral radish accessions showed 22-38% and 21-47% lower seed numbers and yield per plant than the susceptible accession. CONCLUSION This is the first report of fitness cost associated with the AHAS Trp574Leu mutation in R. sativus populations. This fitness cost could reduce frequency of the resistant allele without herbicide selection. © 2018 Society of Chemical Industry.
Collapse
Affiliation(s)
- Roman B Vercellino
- CERZOS, Departamento de Agronomía, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Claudio E Pandolfo
- CERZOS, Departamento de Agronomía, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Gabriela Breccia
- Instituto de Investigaciones en Ciencias Agrarias de Rosario, Universidad Nacional de Rosario, Consejo Nacional de Investigaciones Científicas y Técnicas (IICAR, UNR, CONICET), Zavalla, Argentina
| | - Miguel Cantamutto
- Instituto Nacional de Tecnología Agropecuaria, Hilario Ascasubi, Argentina
| | - Alejandro Presotto
- CERZOS, Departamento de Agronomía, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| |
Collapse
|
62
|
Guo W, Chi Y, Feng L, Tian X, Liu W, Wang J. Fenoxaprop-P-ethyl and mesosulfuron-methyl resistance status of shortawn foxtail (Alopecurus aequalis Sobol.) in eastern China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 148:126-132. [PMID: 29891363 DOI: 10.1016/j.pestbp.2018.04.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 04/23/2018] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
Resistance to the acetyl-coenzyme A carboxylase (ACCase)- and acetolactate synthase (ALS)- inhibiting herbicides in shortawn foxtail (Alopecurus aequalis) has been reported in wheat fields of eastern China. To better understand the distribution of the resistant populations and the occurrence of the target-site mutations, 74 populations collected from Anhui, Jiangsu and Shandong province were surveyed, and the ACCase and ALS gene fragments, encompassing all the documented mutant codon positions, were amplified and sequenced. Plants from 37 and 34 populations survived fenoxaprop-P-ethyl and mesosulfuron-methyl treatment at 62.1 g a.i. ha-1 and 9 g a.i. ha-1 respectively, with different survival rates. Twenty-seven populations exhibited multiple resistance to fenoxaprop-P-ethyl and mesosulfuron-methyl. Whole-plant dose-response experiments showed that the resistance index ranged from 6.2 to 167.8 for fenoxaprop-P-ethyl, and from 7.8 to 139.5 for mesosulfuron-methyl. Four ACCase (I1781L, I2041N, I2041T and D2078G) and four ALS (P197R, P197S, P197T and W574 L) resistance mutations were detected respectively. Individuals containing two amino acid substitutions were also found. D2078G and W574 L were predominant ACCase and ALS gene mutations respectively. This study has shown that fenoxaprop-P-ethyl and mesosulfuron-methyl resistance was prevalent in A. aequalis in eastern China, and target site mutations in the ACCase and ALS gene were one of the most common mechanisms.
Collapse
Affiliation(s)
- Wenlei Guo
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, PR China.
| | - Yanyan Chi
- Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, PR China
| | - Li Feng
- Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, PR China
| | - Xingshan Tian
- Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, PR China
| | - Weitang Liu
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Jinxin Wang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China.
| |
Collapse
|
63
|
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.
Collapse
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
| |
Collapse
|
64
|
Han H, Vila-Aiub MM, Jalaludin A, Yu Q, Powles SB. A double EPSPS gene mutation endowing glyphosate resistance shows a remarkably high resistance cost. PLANT, CELL & ENVIRONMENT 2017; 40:3031-3042. [PMID: 28910491 DOI: 10.1111/pce.13067] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 08/24/2017] [Accepted: 08/28/2017] [Indexed: 05/12/2023]
Abstract
A novel glyphosate resistance double point mutation (T102I/P106S, TIPS) in the 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) gene has been recently identified for the first time only in the weed species Eleusine indica. Quantification of plant resistance cost associated with the TIPS and the often reported glyphosate resistance single P106S mutation was performed. A significant resistance cost (50% in seed number currency) associated with the homozygous TIPS but not the homozygous P106S EPSPS variant was identified in E. indica plants. The resistance cost associated with the TIPS mutation escalated to 85% in plants under resource competition with rice crops. The resistance cost was not detected in nonhomozygous TIPS plants denoting the recessive nature of the cost associated with the TIPS allele. An excess of 11-fold more shikimate and sixfold more quinate in the shikimate pathway was detected in TIPS plants in the absence of glyphosate treatment compared to wild type, whereas no changes in these compounds were observed in P106S plants when compared to wild type. TIPS plants show altered metabolite levels in several other metabolic pathways that may account for the expression of the observed resistance cost.
Collapse
Affiliation(s)
- Heping Han
- Australian Herbicide Resistance Initiative (AHRI)-School of Agriculture and Environment, University of Western Australia (UWA), Perth, Australia
| | - Martin M Vila-Aiub
- Australian Herbicide Resistance Initiative (AHRI)-School of Agriculture and Environment, University of Western Australia (UWA), Perth, Australia
- IFEVA-CONICET-Faculty of Agronomy, Department of Ecology, University of Buenos Aires (UBA), Buenos Aires, Argentina
| | - Adam Jalaludin
- 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
| |
Collapse
|
65
|
Larran AS, Palmieri VE, Perotti VE, Lieber L, Tuesca D, Permingeat HR. Target-site resistance to acetolactate synthase (ALS)-inhibiting herbicides in Amaranthus palmeri from Argentina. PEST MANAGEMENT SCIENCE 2017; 73:2578-2584. [PMID: 28703943 DOI: 10.1002/ps.4662] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 07/07/2017] [Accepted: 07/07/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Herbicide-resistant weeds are a serious problem worldwide. Recently, two populations of Amaranthus palmeri with suspected cross-resistance to acetolactate synthase (ALS)-inhibiting herbicides (R1 and R2) were found by farmers in two locations in Argentina (Vicuña Mackenna and Totoras, respectively). We conducted studies to confirm and elucidate the mechanism of resistance. RESULTS We performed in vivo dose-response assays, and confirmed that both populations had strong resistance to chlorimuron-ethyl, diclosulam and imazethapyr when compared with a susceptible population (S). In vitro ALS activity inhibition tests only indicated considerable resistance to imazethapyr and chlorimuron-ethyl, indicating that other non-target mechanisms could be involved in diclosulam resistance. Subsequently, molecular analysis of als nucleotide sequences revealed three single base-pair mutations producing substitutions in amino acids previously associated with resistance to ALS inhibitors, A122, W574, and S653. CONCLUSION This is the first report of als resistance alleles in A. palmeri in Argentina. The data support the involvement of a target-site mechanism of resistance to ALS-inhibiting herbicides. © 2017 Society of Chemical Industry.
Collapse
Affiliation(s)
- Alvaro S Larran
- Laboratorio de Biología Molecular, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Zavalla, Argentina
- Instituto de Investigaciones en Ciencias Agrarias de Rosario (IICAR-CONICET-UNR), Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Zavalla, Argentina
| | - Valeria E Palmieri
- Laboratorio de Biología Molecular, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Zavalla, Argentina
| | - Valeria E Perotti
- Laboratorio de Biología Molecular, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Zavalla, Argentina
| | - Lucas Lieber
- Laboratorio de Biología Molecular, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Zavalla, Argentina
| | - Daniel Tuesca
- Cátedra de Malezas, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Zavalla, Argentina
| | - Hugo R Permingeat
- Laboratorio de Biología Molecular, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Zavalla, Argentina
- Instituto de Investigaciones en Ciencias Agrarias de Rosario (IICAR-CONICET-UNR), Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Zavalla, Argentina
| |
Collapse
|
66
|
Zhang Y, Xu Y, Wang S, Li X, Zheng M. Resistance mutations of Pro197, Asp376 and Trp574 in the acetohydroxyacid synthase (AHAS) affect pigments, growths, and competitiveness of Descurainia sophia L. Sci Rep 2017; 7:16380. [PMID: 29180697 PMCID: PMC5703872 DOI: 10.1038/s41598-017-16655-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 11/15/2017] [Indexed: 11/08/2022] Open
Abstract
D. Sophia is one of the most problematic weed species infesting winter wheat in China, and has evolved high resistance to tribenuron-methyl. Amino acid substitutions at site of Pro197, Asp376 and Trp574 in acetohydroxyacid synthase (AHAS) were mainly responsible for D. sophia resistance to tribenuron-methyl. In this study, D. sophia plant individually homozygous for specific AHAS mutation (Pro197Leu, Pro197His, Pro197Ser, Pro197Thr, Asp376Glu and Trp574Leu) were generated. In addition, the effects of resistance mutations on pigments, growths and competitiveness of susceptible (S) and resistant (R) plants of D. sophia were investigated. The results indicated the R plants carrying Pro197Leu or Pro197His or Asp376Glu or Trp574Leu displayed stronger competitiveness than S plants. The adverse effects on R plants aggravated with the increase of R plants proportion, which made the R plants against domination the weed community in absent of herbicide selection. Therefore, these resistance mutation have no obvious adverse effects on the pigments (chlorophyll a, chlorophyll b and carotenoid), relative growth rates (RGR), leaf area ratio (LAR) and net assimilation rate (NAR) of R plants.
Collapse
Affiliation(s)
- Yongzhi Zhang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China
| | - Yufang Xu
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China
| | - Shipeng Wang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China
| | - Xuefeng Li
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China
| | - Mingqi Zheng
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China.
| |
Collapse
|
67
|
Zhang L, Guo W, Li Q, Wu C, Zhao N, Liu W, Wang J. Tribenuron-methyl resistance and mutation diversity of the AHAS gene in shepherd's purse (Capsella bursa-pastoris (L.) Medik.) in Henan Province, China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 143:239-245. [PMID: 29183598 DOI: 10.1016/j.pestbp.2017.05.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 04/22/2017] [Accepted: 05/10/2017] [Indexed: 06/07/2023]
Abstract
Shepherd's purse is a troublesome dicot weed that occurs in the major wheat-producing areas in China. Twenty-eight shepherd's purse populations were collected from winter wheat-planting areas in Henan Province and used to evaluate tribenuron-methyl resistance and acetohydroxyacid synthase (AHAS) gene-mutation diversity. The results indicate that all 28 shepherd's purse populations were resistant to tribenuron-methyl at different levels compared with the susceptible population. Mutation of the 197 codon (CCT) changed proline (Pro) into tyrosine (Tyr), histidine (His), leucine (Leu), serine (Ser), arginine (Arg), alanine (Ala) and threonine (Thr), whereas mutation of the 574 codon (TGG) changed tryptophan (Trp) into leucine (Leu). Among these amino acid changes, a co-concurrence of Pro197Leu and Trp574Leu substitutions was identified for the first time in resistant weed species. Furthermore, Pro197Tyr, Pro197Arg and Pro197Ala substitutions have not been previously reported in shepherd's purse. The results of the in vitro AHAS assay suggest that an insensitive AHAS is likely involved in the resistance to tribenuron-methyl in the R populations with AHAS gene mutations, and the non-target-site based resistance might exist in some populations.
Collapse
Affiliation(s)
- Lele Zhang
- Keya Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Wenlei Guo
- Keya Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Qi Li
- Keya Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Cuixia Wu
- Taian Academy of Agricultural Sciences, Tai'an, Shandong 271000, PR China
| | - Ning Zhao
- Keya Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Weitang Liu
- Keya Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Jinxin Wang
- Keya Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, PR China.
| |
Collapse
|
68
|
Liu W, Bai S, Jia S, Guo W, Zhang L, Li W, Wang J. Comparison of ALS functionality and plant growth in ALS-inhibitor susceptible and resistant Myosoton aquaticum L. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 142:111-116. [PMID: 29107233 DOI: 10.1016/j.pestbp.2017.03.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 03/09/2017] [Accepted: 03/26/2017] [Indexed: 06/07/2023]
Abstract
Herbicide target-site resistance mutations may cause pleiotropic effects on plant ecology and physiology. The effect of several known (Pro197Ser, Pro197Leu Pro197Ala, and Pro197Glu) target-site resistance mutations of the ALS gene on both ALS functionality and plant vegetative growth of weed Myosoton aquaticum L. (water chickweed) have been investigated here. The enzyme kinetics of ALS from four purified water chickweed populations that each homozygous for the specific target-site resistance-endowing mutations were characterized and the effect of these mutations on plant growth was assessed via relative growth rate (RGR) analysis. Plants homozygous for Pro197Ser and Pro197Leu exhibited higher extractable ALS activity than susceptible (S) plants, while all ALS mutations with no negative change in ALS kinetics. The Pro197Leu mutation increased ALS sensitivity to isoleucine and valine, and Pro197Glu mutation slightly increased ALS sensitivity to isoleucine. RGR results indicated that none of these ALS resistance mutations impose negative pleiotropic effects on relative growth rate. However, resistant (R) seeds had a lowed germination rate than S seeds. This study provides baseline information on ALS functionality and plant growth characteristics associated with ALS inhibitor resistance-endowing mutations in water chickweed.
Collapse
Affiliation(s)
- Weitang Liu
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Shuang Bai
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Sisi Jia
- Taian Entry-Exit Inspection And Quarantine Bureau, Tai'an 271000, Shandong, China
| | - Wenlei Guo
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Lele Zhang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Wei Li
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Jinxin Wang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China.
| |
Collapse
|
69
|
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.
Collapse
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.
| |
Collapse
|
70
|
Mei Y, Si C, Liu M, Qiu L, Zheng M. Investigation of resistance levels and mechanisms to nicosulfuron conferred by non-target-site mechanisms in large crabgrass (Digitaria sanguinalis L.) from China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 141:84-89. [PMID: 28911745 DOI: 10.1016/j.pestbp.2016.12.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 11/24/2016] [Accepted: 12/05/2016] [Indexed: 06/07/2023]
Abstract
Large crabgrass is a major grass weed widely distributed across China. This weed infests maize fields and has evolved resistance to the acetolactate synthase (ALS)-inhibiting herbicide nicosulfuron due to continuous and intensive use. In this study, a total of 25 out of 26 large crabgrass populations collected from maize field demonstrated resistance to nicosulfuron. Amino acid modifications in ALS known to confer resistance to ALS-inhibiting herbicides in other weeds, were not found in the 9 tested resistant populations. The P450 inhibitor malathion significantly reversed resistance to nicosulfuron in 3 tested populations, indicating one or more P450s may be involved. Nicosulfuron was metabolized more rapidly in one resistant large crabgrass population than in a susceptible biotype. This demonstrates that the metabolic resistance mechanisms involving one or more P450s may be responsible for large crabgrass resistance to nicosulfuron in this biotype.
Collapse
Affiliation(s)
- Yu Mei
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Chong Si
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Mingjie Liu
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Lihong Qiu
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Mingqi Zheng
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China.
| |
Collapse
|
71
|
Panozzo S, Milani A, Scarabel L, Balogh Á, Dancza I, Sattin M. Occurrence of Different Resistance Mechanisms to Acetolactate Synthase Inhibitors in European Sorghum halepense. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7320-7327. [PMID: 28767243 DOI: 10.1021/acs.jafc.7b01243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Four Hungarian and two Italian Sorghum halepense populations harvested in maize fields were investigated to elucidate the levels and mechanisms underlying acetolactate synthase (ALS) inhibitors resistance. The two Italian populations were highly cross-resistant to all ALS inhibitors tested, and the variant ALS allele Leu574 was identified in most of the plants; no differences were observed when the plants were treated with herbicide plus malathion. This suggests that the main resistance mechanism is target-site mediated. The Hungarian populations proved to be controlled by imazamox, while they were resistant to sulfonylureas and bispyribac-Na. All Hungarian populations, but not all plants of population 12-49H, presented the variant allele Glu376. This is the first documented occurrence of the Asp-376-Glu substitution in S. halepense. ALS enzyme bioassay and treatment with malathion confirmed that at least in plants of two populations the resistance is very likely due to both target-site and enhanced metabolism of P450 enzymes.
Collapse
Affiliation(s)
- Silvia Panozzo
- Institute of Agro-environmental and Forest Biology (IBAF) - CNR , viale dell'Università 16, 35020 Legnaro, PD, Italy
| | - Andrea Milani
- Institute of Agro-environmental and Forest Biology (IBAF) - CNR , viale dell'Università 16, 35020 Legnaro, PD, Italy
| | - Laura Scarabel
- Institute of Agro-environmental and Forest Biology (IBAF) - CNR , viale dell'Università 16, 35020 Legnaro, PD, Italy
| | - Ákos Balogh
- Syngenta Crop Protection AG , Schwarzwaldallee 215, CH-4058 Basel, Switzerland
| | - Istvan Dancza
- Syngenta Kft. , Aliz. str. 2, H-1117 Budapest, Hungary
| | - Maurizio Sattin
- Institute of Agro-environmental and Forest Biology (IBAF) - CNR , viale dell'Università 16, 35020 Legnaro, PD, Italy
| |
Collapse
|
72
|
Zhao B, Fu D, Yu Y, Huang C, Yan K, Li P, Shafi J, Zhu H, Wei S, Ji M. Non-target-site resistance to ALS-inhibiting herbicides in a Sagittaria trifolia L. population. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 140:79-84. [PMID: 28755698 DOI: 10.1016/j.pestbp.2017.06.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 06/12/2017] [Accepted: 06/13/2017] [Indexed: 06/07/2023]
Abstract
Sagittaria trifolia L. is one of the most competitive weeds in rice fields in northeastern China. The continuous use of acetolactate synthase (ALS)-inhibitors has led to the evolution of herbicide resistant S. trifolia. A subpopulation BC1, which was derived from the L1 population, was analyzed using DNA sequencing and ALS enzyme activity assays and levels of resistance to five ALS-inhibiting herbicides was determined. DNA sequencing and ALS enzyme assays revealed no amino acid substitutions and no significant differences in enzyme sensitivity between susceptible and resistant populations. Whole-plant dose-response experiments showed that the BC1 population exhibited different levels of resistance (resistance ratios ranging from 2.14 to 51.53) to five ALS herbicides, and the addition of malathion (P450 inhibitor) to bensulfuron-methyl, penoxsulam and bispyribac-sodium strongly reduced the dry weight accumulation of the BC1 population compared with the effects of the three herbicides alone. The results of the present study demonstrated that the BC1 population has evolved non-target-site resistance to ALS-inhibiting herbicides.
Collapse
Affiliation(s)
- Bochui Zhao
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Danni Fu
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Yang Yu
- Solid Waste and Chemicals Management Center, Ministry of Environmental Protection, Chaoyang, Beijing 100029, China
| | - Chengtian Huang
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Kecheng Yan
- Shenyang Research Institute of Chemical Industry, Shenyang, Liaoning 110021, China
| | - Pingsheng Li
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Jamil Shafi
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - He Zhu
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Songhong Wei
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Mingshan Ji
- College of Plant Protection, Shenyang Agricultural University, Shenyang, Liaoning 110866, China.
| |
Collapse
|
73
|
Barrell PJ, Latimer JM, Baldwin SJ, Thompson ML, Jacobs JME, Conner AJ. Somatic cell selection for chlorsulfuron-resistant mutants in potato: identification of point mutations in the acetohydroxyacid synthase gene. BMC Biotechnol 2017; 17:49. [PMID: 28587679 PMCID: PMC5461709 DOI: 10.1186/s12896-017-0371-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 06/01/2017] [Indexed: 11/14/2022] Open
Abstract
Background Somatic cell selection in plants allows the recovery of spontaneous mutants from cell cultures. When coupled with the regeneration of plants it allows an effective approach for the recovery of novel traits in plants. This study undertook somatic cell selection in the potato (Solanum tuberosum L.) cultivar ‘Iwa’ using the sulfonylurea herbicide, chlorsulfuron, as a positive selection agent. Results Following 5 days’ exposure of potato cell suspension cultures to 20 μg/l chlorsulfuron, rescue selection recovered rare potato cell colonies at a frequency of approximately one event in 2.7 × 105 of plated cells. Plants that were regenerated from these cell colonies retained resistance to chlorsulfuron and two variants were confirmed to have different independent point mutations in the acetohydroxyacid synthase (AHAS) gene. One point mutation involved a transition of cytosine for thymine, which substituted the equivalent of Pro-197 to Ser-197 in the AHAS enzyme. The second point mutation involved a transversion of thymine to adenine, changing the equivalent of Trp-574 to Arg-574. The two independent point mutations recovered were assembled into a chimeric gene and binary vector for Agrobacterium-mediated transformation of wild-type ‘Iwa’ potato. This confirmed that the mutations in the AHAS gene conferred chlorsulfuron resistance in the resulting transgenic plants. Conclusions Somatic cell selection in potato using the sulfonylurea herbicide, chlorsulfuron, recovered resistant variants attributed to mutational events in the AHAS gene. The mutant AHAS genes recovered are therefore good candidates as selectable marker genes for intragenic transformation of potato. Electronic supplementary material The online version of this article (doi:10.1186/s12896-017-0371-4) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Philippa J Barrell
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 4704, Christchurch, 8140, New Zealand
| | - Julie M Latimer
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 4704, Christchurch, 8140, New Zealand
| | - Samantha J Baldwin
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 4704, Christchurch, 8140, New Zealand
| | - Michelle L Thompson
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 4704, Christchurch, 8140, New Zealand
| | - Jeanne M E Jacobs
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 4704, Christchurch, 8140, New Zealand.,Bio-Protection Research Centre, Lincoln University, PO Box 85084, Lincoln, 7647, New Zealand
| | - Anthony J Conner
- Bio-Protection Research Centre, Lincoln University, PO Box 85084, Lincoln, 7647, New Zealand. .,AgResearch Ltd, Lincoln Research Centre, Private Bag 4749, Christchurch, 8140, New Zealand.
| |
Collapse
|
74
|
Rey-Caballero J, Menéndez J, Osuna MD, Salas M, Torra J. Target-site and non-target-site resistance mechanisms to ALS inhibiting herbicides in Papaver rhoeas. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 138:57-65. [PMID: 28456305 DOI: 10.1016/j.pestbp.2017.03.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 02/24/2017] [Accepted: 03/01/2017] [Indexed: 05/10/2023]
Abstract
Target-site and non-target-site resistance mechanisms to ALS inhibitors were investigated in multiple resistant (tribenuron-methyl and 2,4-D) and only 2,4-D resistant, Spanish corn poppy populations. Six amino-acid replacements at the Pro197 position (Ala197, Arg197, His197, Leu197, Thr197 and Ser197) were found in three multiple resistant populations. These replacements were responsible for the high tribenuron-methyl resistance response, and some of them, especially Thr197 and Ser197, elucidated the cross-resistant pattern for imazamox and florasulam, respectively. Mutations outside of the conserved regions of the ALS gene (Gly427 and Leu648) were identified, but not related to resistance response. Higher mobility of labeled tribenuron-methyl in plants with multiple resistance was, however, similar to plants with only 2,4-D resistance, indicating the presence of non-target-site resistance mechanisms (NTSR). Metabolism studies confirmed the presence of a hydroxy imazamox metabolite in one of the populations. Lack of correlation between phenotype and genotype in plants treated with florasulam or imazamox, non-mutated plants surviving imazamox, tribenuron-methyl translocation patterns and the presence of enhanced metabolism revealed signs of the presence of NTSR mechanisms to ALS inhibitors in this species. On this basis, selection pressure with ALS non-SU inhibitors bears the risk of promoting the evolution of NTSR mechanisms in corn poppy.
Collapse
Affiliation(s)
- Jordi Rey-Caballero
- Department d'Hortofructicultura, Botànica i Jardineria, Agrotecnio, Universitat de Lleida, Alcalde Rovira Roure 191, Lleida, Spain
| | - Julio Menéndez
- Departamento de Ciencias Agroforestales, Escuela Politécnica Superior, Campus Universitario de La Rábida, 21071 Palos de la Frontera, Huelva, Spain
| | - Maria D Osuna
- "Finca La Orden-Valdesequera" Research Centre, Ctra. A-V, Km372, 06187 Guadajira, Badajoz, Spain
| | - Marisa Salas
- DuPont de Nemours, Reu Delarivière Lefoullon, La Defense Cedex, Paris 92064, France
| | - Joel Torra
- Department d'Hortofructicultura, Botànica i Jardineria, Agrotecnio, Universitat de Lleida, Alcalde Rovira Roure 191, Lleida, Spain.
| |
Collapse
|
75
|
Ureta MS, Torres Carbonell F, Pandolfo C, Presotto AD, Cantamutto MA, Poverene M. IMI resistance associated to crop-weed hybridization in a natural Brassica rapa population: characterization and fate. ENVIRONMENTAL MONITORING AND ASSESSMENT 2017; 189:101. [PMID: 28185156 DOI: 10.1007/s10661-016-5760-y] [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: 04/22/2016] [Accepted: 12/27/2016] [Indexed: 05/14/2023]
Abstract
Wild turnip (Brassica rapa) is a common weed and a close relative to oilseed rape (Brassica napus). The Clearfield® production system is a highly adopted tool which provides an alternative solution for weed management, but its efficiency is threatened by gene transfer from crop to weed relatives. Crop-weed hybrids with herbicide resistance were found in the progeny of a B. rapa population gathered from a weedy stand on the borders of an oilseed rape (B. napus) imidazolinone (IMI)-resistant crop. Interspecific hybrids were confirmed by morphological traits in the greenhouse and experimental field, survival after imazethapyr applications, DNA content through flow cytometry, and pollen viability. The transference of herbicide resistance was demonstrated even in a particular situation of pollen competition between both an herbicide-resistant crop and a non-resistant crop. However, IMI resistance was not found in further generations collected at the same location. These results verify gene transmission from oilseed rape to B. rapa in the main crop area in Argentina where resistant and susceptible varieties are found and seed loss and crop volunteers are common. Hybridization, introgression, and herbicide selection would be associated with the loss of effectiveness of IMI technology.
Collapse
Affiliation(s)
- M S Ureta
- Departamento de Agronomía, Universidad Nacional del Sur and CERZOS-CCT, 8000, Bahía Blanca, Argentina.
| | - F Torres Carbonell
- Departamento de Agronomía, Universidad Nacional del Sur and CERZOS-CCT, 8000, Bahía Blanca, Argentina
| | - C Pandolfo
- Departamento de Agronomía, Universidad Nacional del Sur and CERZOS-CCT, 8000, Bahía Blanca, Argentina
| | - A D Presotto
- Departamento de Agronomía, Universidad Nacional del Sur and CERZOS-CCT, 8000, Bahía Blanca, Argentina
| | - M A Cantamutto
- EEA INTA, Hilario Ascasubi, Ruta 3 km 794, Buenos Aires, Argentina
| | - M Poverene
- Departamento de Agronomía, Universidad Nacional del Sur and CERZOS-CCT, 8000, Bahía Blanca, Argentina
| |
Collapse
|
76
|
Deng W, Yang Q, Zhang Y, Jiao H, Mei Y, Li X, Zheng M. Cross-resistance patterns to acetolactate synthase (ALS)-inhibiting herbicides of flixweed (Descurainia sophia L.) conferred by different combinations of ALS isozymes with a Pro-197-Thr mutation or a novel Trp-574-Leu mutation. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 136:41-45. [PMID: 28187829 DOI: 10.1016/j.pestbp.2016.08.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 08/13/2016] [Accepted: 08/19/2016] [Indexed: 05/27/2023]
Abstract
Acetolactate synthase (ALS) is the common target of ALS-inhibiting herbicides, and target-site ALS mutations are the main mechanism of resistance to ALS-inhibiting herbicides. In this study, ALS1 and ALS2 genes with full lengths of 2004bp and 1998bp respectively were cloned in individual plants of susceptible (S) or resistant (R) flixweed (Descurainia sophia L.) populations. Two ALS mutations of Pro-197-Thr and/or Trp-574-Leu were identified in plants of three R biotypes (HB24, HB30 and HB42). In order to investigate the function of ALS isozymes in ALS-inhibiting herbicide resistance, pHB24 (a Pro-197-Thr mutation in ALS1 and a wild type ALS2), pHB42 (a Trp-574-Leu mutation in ALS1 and a wild type ALS2) and pHB30 (a Trp-574-Leu mutation in ALS1 and a Pro-197-Thr mutation in ALS2) subpopulations individually homozygous for different ALS mutations were generated. Individuals of pHB30 had mutations in each isozyme of ALS and had higher resistance than pHB24 and pHB42 populations containing mutations in only one ALS isozyme. Moreover, the pHB24 had resistance to SU, TP and SCT herbicides, whereas pHB24 and pHB42 had resistance to these classes of herbicides as well as IMI and PTB herbicides. The sensitivity of isolated ALS enzyme to inhibition by herbicides in these populations correlated with whole plant resistance levels. Therefore, reduced ALS sensitivity resulting from the mutations in ALS was responsible for resistance to ALS-inhibiting herbicides in flixweed.
Collapse
Affiliation(s)
- Wei Deng
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Qian Yang
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Yongzhi Zhang
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Hongtao Jiao
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Yu Mei
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Xuefeng Li
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Mingqi Zheng
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China.
| |
Collapse
|
77
|
Keshtkar E, Mathiassen SK, Kudsk P. No Vegetative and Fecundity Fitness Cost Associated with Acetyl-Coenzyme A Carboxylase Non-target-site Resistance in a Black-Grass ( Alopecurus myosuroides Huds) Population. FRONTIERS IN PLANT SCIENCE 2017; 8:2011. [PMID: 29234334 PMCID: PMC5712368 DOI: 10.3389/fpls.2017.02011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 11/10/2017] [Indexed: 05/22/2023]
Abstract
Attention should be devoted to weeds evolving herbicide resistance with non-target-site resistance (NTSR) mechanism due to their unpredictable resistance patterns. Quantification of fitness cost can be used in NTSR management strategies to determine the long-term fate of resistant plants in weed populations. To our knowledge, this is the first report evaluating potential fecundity and vegetative fitness of a NTSR black-grass (Alopecurus myosuroides Huds), the most important herbicide resistant weed in Europe, with controlled genetic background. The susceptible (S) and NTSR sub-populations were identified and isolated from a fenoxaprop-P-ethyl resistant population by a plant cloning technique. Using a target-neighborhood design, competitive responses of S and NTSR black-grass sub-populations to increasing density of winter wheat were quantified for 2 years in greenhouse and 1 year in field. Fitness traits including potential seed production, vegetative biomass and tiller number of both sub-populations significantly decreased with increasing density of winter wheat. More importantly, no statistically significant differences were found in fitness traits between S and NTSR sub-populations either grown alone (no competition) or in competition with winter wheat. According to the results, the NTSR black-grass is probably to persist in field even in the cessation of fenoxaprop-P-ethyl. So, effective herbicide resistant management strategies are strongly suggested to prevent and stop the spread of the NTSR black-grass, otherwise NTSR loci conferring resistance to a range of herbicides in black-grass will persist in the gene pool even in the absence of herbicide application. Consequently, herbicide as an effective tool for control of black-grass will gradually be lost in fields infested by NTSR black-grass.
Collapse
Affiliation(s)
- Eshagh Keshtkar
- Department of Agroecology, Faculty of Science and Technology, Aarhus University, Slagelse, Denmark
- Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
- *Correspondence: Eshagh Keshtkar,
| | - Solvejg K. Mathiassen
- Department of Agroecology, Faculty of Science and Technology, Aarhus University, Slagelse, Denmark
| | - Per Kudsk
- Department of Agroecology, Faculty of Science and Technology, Aarhus University, Slagelse, Denmark
| |
Collapse
|
78
|
Panozzo S, Scarabel L, Rosan V, Sattin M. A New Ala-122-Asn Amino Acid Change Confers Decreased Fitness to ALS-Resistant Echinochloa crus-galli. FRONTIERS IN PLANT SCIENCE 2017; 8:2042. [PMID: 29234345 PMCID: PMC5712356 DOI: 10.3389/fpls.2017.02042] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 11/14/2017] [Indexed: 05/12/2023]
Abstract
Gene mutations conferring herbicide resistance may cause pleiotropic effects on plant fitness. Knowledge of these effects is important for managing the evolution of herbicide-resistant weeds. An Echinochloa crus-galli population resistant to acetolactate synthase (ALS) herbicides was collected in a maize field in north-eastern Italy and the cross-resistance pattern, resistance mechanism and fitness costs associated to mutant-resistant plants under field conditions in the presence or absence of intra-specific competition were determined. The study reports for the first time the Ala-122-Asn amino-acid change in the ALS gene that confers high levels of cross-resistance to all ALS inhibitors tested. Results of 3-year growth analysis showed that mutant resistant E. crus-galli plants had a delayed development in comparison with susceptible plants and this was registered in both competitive (3, 7, and 20 plants m-2) and non-competitive (spaced plants) situations. The number of panicles produced by resistant plants was also lower (about 40% fewer panicles) than susceptible plants under no-intraspecific competition. Instead, with the increasing competition level, the difference in panicle production at harvest time decreased until it became negligible at 20 plants m-2. Evaluation of total dry biomass as well as biomass allocation in vegetative parts did not highlight any difference between resistant and susceptible plants. Instead, panicle dry weight was higher in susceptible plants indicating that they allocated more biomass than resistant ones to the reproductive organs, especially in no-competition and in competition situations at lower plant densities. The different fitness between resistant and susceptible phenotypes suggests that keeping the infestation density as low as possible can increase the reproduction success of the susceptible phenotype and therefore contribute to lowering the ratio between resistant and susceptible alleles. If adequately embedded in a medium or long-term integrated weed management strategy, the presence of R plants with a fitness penalty provides an opportunity to minimize or reverse herbicide resistance evolution through the implementation of integrated weed management, i.e., all possible control tools available.
Collapse
|
79
|
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
|
80
|
Van Etten ML, Kuester A, Chang SM, Baucom RS. Fitness costs of herbicide resistance across natural populations of the common morning glory, Ipomoea purpurea. Evolution 2016; 70:2199-2210. [PMID: 27470166 DOI: 10.1111/evo.13016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 06/23/2016] [Accepted: 07/06/2016] [Indexed: 11/26/2022]
Abstract
Although fitness costs associated with plant defensive traits are widely expected, they are not universally detected, calling into question their generality. Here, we examine the potential for life-history trade-offs associated with herbicide resistance by examining seed germination, root growth, and above-ground growth across 43 naturally occurring populations of Ipomoea purpurea that vary in their resistance to RoundUp®, the most commonly used herbicide worldwide. We find evidence for life-history trade-offs associated with all three traits; highly resistant populations had lower germination, shorter roots, and smaller above-ground size. A visual exploration of the data indicated that the type of trade-off may differ among populations. Our results demonstrate that costs of adaptation may be present at stages other than simply the production of progeny in this agricultural weed. Additionally, the cumulative effect of costs at multiple life cycle stages can result in severe consequences to fitness when adapting to novel environments.
Collapse
Affiliation(s)
- Megan L Van Etten
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48103.
| | - Adam Kuester
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48103
| | - Shu-Mei Chang
- Plant Biology Department, University of Georgia, Athens, Georgia, 30602
| | - Regina S Baucom
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48103
| |
Collapse
|
81
|
Yang Q, Deng W, Li X, Yu Q, Bai L, Zheng M. Target-site and non-target-site based resistance to the herbicide tribenuron-methyl in flixweed (Descurainia sophia L.). BMC Genomics 2016; 17:551. [PMID: 27495977 PMCID: PMC4974779 DOI: 10.1186/s12864-016-2915-8] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 07/07/2016] [Indexed: 11/30/2022] Open
Abstract
Background Flixweed (Descurainia sophia L.) is a troublesome and widespread broadleaf weed in winter fields in China, and has evolved high level resistance to acetolactate synthase (ALS)-inhibiting sulfonylurea herbicide tribenuron-methyl. Results We identified a resistant flixweed population (N11) exhibiting 116.3-fold resistance to tribenuron-methyl relative to the susceptible population (SD8). Target-site ALS gene mutation Pro-197-Thr was identified in resistant plants. Moreover, the resistance can be reversed to 28.7-fold by the cytochrome P450 inhibitor malathion. The RNA-Sequencing was employed to identify candidate genes involved in non-target-site metabolic resistance in this population. Total 26 differentially expressed contigs were identified and eight of them (four P450s, one ABC transporter, three glycosyltransferase) verified by qRT-PCR. Consistent over-expression of the two contigs homology to CYP96A13 and ABCC1 transporter, respectively, were further qRT-PCR validated using additional plants from the resistant and susceptible populations. Conclusions Tribenuron-methyl resistance in flixweed is controlled by target-site ALS mutation and non-target-site based mechanisms. Two genes, CYP96A13 and ABCC1 transporter, could play an important role in metabolic resistance to tribenuron-methyl in the resistant flixweed population and justify further functional studies. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2915-8) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Qian Yang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China
| | - Wei Deng
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China
| | - Xuefeng Li
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China
| | - Qin Yu
- Australian Herbicide Resistance Initiative, School of Plant Biology, University of Western Australia, Crawley, WA, 6009, Australia
| | - Lianyang Bai
- Hunan Academy of Agricultural Science, Changsha, 410125, China
| | - Mingqi Zheng
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China.
| |
Collapse
|
82
|
Merotto A, Goulart ICGR, Nunes AL, Kalsing A, Markus C, Menezes VG, Wander AE. Evolutionary and social consequences of introgression of nontransgenic herbicide resistance from rice to weedy rice in Brazil. Evol Appl 2016; 9:837-46. [PMID: 27468302 PMCID: PMC4947146 DOI: 10.1111/eva.12387] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 04/25/2016] [Indexed: 11/28/2022] Open
Abstract
Several studies have expressed concerns about the effects of gene flow from transgenic herbicide-resistant crops to their wild relatives, but no major problems have been observed. This review describes a case study in which what has been feared in transgenics regarding gene flow has actually changed biodiversity and people's lives. Nontransgenic imidazolinone-resistant rice (IMI-rice) cultivars increased the rice grain yield by 50% in southern Brazil. This increase was beneficial for life quality of the farmers and also improved the regional economy. However, weedy rice resistant to imidazolinone herbicides started to evolve three years after the first use of IMI-rice cultivars. Population genetic studies indicate that the herbicide-resistant weedy rice was mainly originated from gene flow from resistant cultivars and distributed by seed migration. The problems related with herbicide-resistant weedy rice increased the production costs of rice that forced farmers to sell or rent their land. Gene flow from cultivated rice to weedy rice has proven to be a large agricultural, economic, and social constraint in the use of herbicide-resistant technologies in rice. This problem must be taken into account for the development of new transgenic or nontransgenic rice technologies.
Collapse
Affiliation(s)
- Aldo Merotto
- Federal University of Rio Grande do Sul-UFRGS Porto Alegre RS Brazil
| | - Ives C G R Goulart
- Brasilian Agriculture Research Corporation-EMBRAPA Forestry Colombo PR Brazil
| | | | | | - Catarine Markus
- Federal University of Rio Grande do Sul-UFRGS Porto Alegre RS Brazil
| | | | - Alcido E Wander
- Brasilian Agriculture Research Corporation-EMBRAPA Rice and Beans Santo Antônio de Goias GO Brazil
| |
Collapse
|
83
|
Bracamonte E, Fernández-Moreno PT, Barro F, De Prado R. Glyphosate-Resistant Parthenium hysterophorus in the Caribbean Islands: Non Target Site Resistance and Target Site Resistance in Relation to Resistance Levels. FRONTIERS IN PLANT SCIENCE 2016; 7:1845. [PMID: 27999586 PMCID: PMC5138282 DOI: 10.3389/fpls.2016.01845] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 11/22/2016] [Indexed: 05/19/2023]
Abstract
Glyphosate has been the most intensely herbicide used worldwide for decades, and continues to be a single tool for controlling weeds in woody crops. However, the adoption of this herbicide in a wide range of culture systems has led to the emergence of resistant weeds. Glyphosate has been widely used primarily on citrus in the Caribbean area, but a study of resistance in the Caribbean islands of Cuba and the Dominican Republic has never been carried out. Unfortunately, Parthenium hysterophorus has developed glyphosate-resistance in both islands, independently. The resistance level and mechanisms of different P. hysterophorus accessions (three collected in Cuba (Cu-R) and four collected in the Dominican Republic (Do-R) have been studied under greenhouse and laboratory conditions. In in vivo assays (glyphosate dose causing 50% reduction in above-ground vegetative biomass and survival), the resistance factor levels showed susceptible accessions (Cu-S ≥ Do-S), low-resistance accessions (Cu-R3 < Do-R4), medium-resistance accessions (Do-R3 < Cu-R2 < Do-R2) and high-resistance accessions (Do-R1 < Cu-R1). In addition, the resistance factor levels were similar to those found in the shikimic acid accumulation at 1000 μM of glyphosate (Cu-R1 ≥ Do-R1 > Do-R2 > Cu-R2 > Do-R3 > Do-R4 > Cu-R3 >> Cu-S ≥ Do-S). Glyphosate was degraded to aminomethylphosphonic acid, glyoxylate and sarcosine by >88% in resistant accessions except in Cu-R3 and Do-R4 resistant accessions (51.12 and 44.21, respectively), whereas a little glyphosate (<9.32%) was degraded in both susceptible accessions at 96 h after treatment. There were significant differences between P. hysterophorus accessions in the 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) activity enzyme with and without different glyphosate rates. The R accessions showed values of between 0.026 and 0.21 μmol μg-1 TSP protein min-1 basal EPSPS activity values with respect to the S (0.024 and 0.025) accessions. The same trend was found in the EPSPS enzyme activity treated with glyphosate, where a higher enzyme activity inhibition (glyphosate μM) corresponded to greater resistance levels in P. hysterophorus accessions. One amino acid substitution was found at position 106 in EPSPS, consisting of a proline to serine change in Cu-R1, Do-R1 Do-R2. The above-mentioned results indicate that high resistance values are determined by the number of defense mechanisms (target-site and non-target-site resistance) possessed by the different P. hysterophorus accessions, concurrently.
Collapse
Affiliation(s)
- Enzo Bracamonte
- Faculty of Agricultural Sciences, National University of Córdoba (UNC)Córdoba, Argentina
| | | | - Francisco Barro
- Department of Plant Breeding, Institute for Sustainable Agriculture (IAS), Spanish National Research Council (CSIC)Cordoba, Spain
| | - Rafael De Prado
- Department of Agricultural Chemistry and Edaphology, University of CordobaCordoba, Spain
- *Correspondence: Rafael De Prado
| |
Collapse
|
84
|
Peng C, Uygun S, Shiu SH, Last RL. The Impact of the Branched-Chain Ketoacid Dehydrogenase Complex on Amino Acid Homeostasis in Arabidopsis. PLANT PHYSIOLOGY 2015; 169:1807-20. [PMID: 25986129 PMCID: PMC4634046 DOI: 10.1104/pp.15.00461] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 05/15/2015] [Indexed: 05/05/2023]
Abstract
The branched-chain amino acids (BCAAs) Leu, Ile, and Val are among nine essential amino acids that must be obtained from the diet of humans and other animals, and can be nutritionally limiting in plant foods. Despite genetic evidence of its importance in regulating seed amino acid levels, the full BCAA catabolic network is not completely understood in plants, and limited information is available regarding its regulation. In this study, transcript coexpression analyses revealed positive correlations among BCAA catabolism genes in stress, development, diurnal/circadian, and light data sets. A core subset of BCAA catabolism genes, including those encoding putative branched-chain ketoacid dehydrogenase subunits, is highly expressed during the night in plants on a diel cycle and in prolonged darkness. Mutants defective in these subunits accumulate higher levels of BCAAs in mature seeds, providing genetic evidence for their function in BCAA catabolism. In addition, prolonged dark treatment caused the mutants to undergo senescence early and overaccumulate leaf BCAAs. These results extend the previous evidence that BCAAs can be catabolized and serve as respiratory substrates at multiple steps. Moreover, comparison of amino acid profiles between mature seeds and dark-treated leaves revealed differences in amino acid accumulation when BCAA catabolism is perturbed. Together, these results demonstrate the consequences of blocking BCAA catabolism during both normal growth conditions and under energy-limited conditions.
Collapse
Affiliation(s)
- Cheng Peng
- Department of Plant Biology (C.P., S.-H.S., R.L.L.), Department of Energy Plant Research Laboratory (C.P., S.U.), Genetics Program (S.U., S.-H.S.), and Department of Biochemistry and Molecular Biology (R.L.L.), Michigan State University, East Lansing, Michigan 48824
| | - Sahra Uygun
- Department of Plant Biology (C.P., S.-H.S., R.L.L.), Department of Energy Plant Research Laboratory (C.P., S.U.), Genetics Program (S.U., S.-H.S.), and Department of Biochemistry and Molecular Biology (R.L.L.), Michigan State University, East Lansing, Michigan 48824
| | - Shin-Han Shiu
- Department of Plant Biology (C.P., S.-H.S., R.L.L.), Department of Energy Plant Research Laboratory (C.P., S.U.), Genetics Program (S.U., S.-H.S.), and Department of Biochemistry and Molecular Biology (R.L.L.), Michigan State University, East Lansing, Michigan 48824
| | - Robert L Last
- Department of Plant Biology (C.P., S.-H.S., R.L.L.), Department of Energy Plant Research Laboratory (C.P., S.U.), Genetics Program (S.U., S.-H.S.), and Department of Biochemistry and Molecular Biology (R.L.L.), Michigan State University, East Lansing, Michigan 48824
| |
Collapse
|
85
|
Wei S, Li P, Ji M, Dong Q, Wang H. Target-site resistance to bensulfuron-methyl in Sagittaria trifolia L. populations. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 124:81-5. [PMID: 26453234 DOI: 10.1016/j.pestbp.2015.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 05/05/2015] [Accepted: 05/05/2015] [Indexed: 05/27/2023]
Abstract
Sagittaria trifolia L. is one of the most serious weeds in paddy fields in northeast of China and cannot be controlled effectively by bensulfuron-methyl in recent years. In this study, two suspected resistant S. trifolia populations (R1 and R2) were collected in Liaoning province of China. Whole-plant dose-response studies showed that R1 and R2 were highly resistant to bensulfuron-methyl, with the GR50 R/S ratios of 76.99 and 49.94 respectively. In vitro acetolactate synthase (ALS) assays revealed that resistance was due to reduced sensitivity of the ALS to bensulfuron-methyl inhibition, with I50 R/S ratios of 81.86 and 67.48 for R1 and R2, respectively. Total ALS activity was similar for the S and R2 populations, whereas the R1 population displayed significantly higher ALS activity than did the S population. The mutations Pro-197-Leu and Pro-197-Ser were identified in the ALS gene of the R1 and R2 populations, respectively. This is the first report examining bensulfuron-resistant S. trifolia in Liaoning province, China. The Pro197 mutation is likely responsible for resistance to bensulfuron-methyl in S. trifolia populations.
Collapse
Affiliation(s)
- Songhong Wei
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Pingsheng Li
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Mingshan Ji
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China.
| | - Qin Dong
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Haining Wang
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| |
Collapse
|
86
|
Chen J, Huang Z, Zhang C, Huang H, Wei S, Chen J, Wang X. Molecular basis of resistance to imazethapyr in redroot pigweed (Amaranthus retroflexus L.) populations from China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 124:43-47. [PMID: 26453229 DOI: 10.1016/j.pestbp.2015.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 04/08/2015] [Accepted: 04/09/2015] [Indexed: 06/05/2023]
Abstract
Three putative resistant Amaranthus retroflexus L. populations were collected in Heilongjiang province in China. Whole plant bioassays indicated high resistance (RI > 10) to imazethapyr in the three populations. In vitro acetolactate synthase (ALS) assays revealed that ALS from populations H3, H17 and H39 was less sensitive to imazethapyr inhibition compared to the susceptible population H76. The half-maximal inhibitory concentration (I50) values for H3, H17 and H39 were 14.83, 15.27 and 268 times greater, respectively, than that of the susceptible population H76. Three nucleotide mutations resulted in three known resistance-endowing amino acid substitutions, Ala-205-Val, Trp-574-Leu and Ser-653-Thr in the three resistant populations respectively. Therefore, ALS target-site mutations in resistant A. retroflexus could be responsible for imazethapyr resistance.
Collapse
Affiliation(s)
- Jinyi Chen
- Key Laboratory of Weed and Rodent Biology and Management, Institute of Plant Protection (IPP), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Zhaofeng Huang
- Key Laboratory of Weed and Rodent Biology and Management, Institute of Plant Protection (IPP), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Chaoxian Zhang
- Key Laboratory of Weed and Rodent Biology and Management, Institute of Plant Protection (IPP), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China.
| | - Hongjuan Huang
- Key Laboratory of Weed and Rodent Biology and Management, Institute of Plant Protection (IPP), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Shouhui Wei
- Key Laboratory of Weed and Rodent Biology and Management, Institute of Plant Protection (IPP), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Jingchao Chen
- Key Laboratory of Weed and Rodent Biology and Management, Institute of Plant Protection (IPP), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Xu Wang
- Key Laboratory of Weed and Rodent Biology and Management, Institute of Plant Protection (IPP), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| |
Collapse
|
87
|
Vila-Aiub MM, Yu Q, Han H, Powles SB. Effect of herbicide resistance endowing Ile-1781-Leu and Asp-2078-Gly ACCase gene mutations on ACCase kinetics and growth traits in Lolium rigidum. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:4711-8. [PMID: 26019257 PMCID: PMC4507778 DOI: 10.1093/jxb/erv248] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The rate of herbicide resistance evolution in plants depends on fitness traits endowed by alleles in both the presence and absence (resistance cost) of herbicide selection. The effect of two Lolium rigidum spontaneous homozygous target-site resistance-endowing mutations (Ile-1781-Leu, Asp-2078-Gly) on both ACCase activity and various plant growth traits have been investigated here. Relative growth rate (RGR) and components (net assimilation rate, leaf area ratio), resource allocation to different organs, and growth responses in competition with a wheat crop were assessed. Unlike plants carrying the Ile-1781-Leu resistance mutation, plants homozygous for the Asp-2078-Gly mutation exhibited a significantly lower RGR (30%), which translated into lower allocation of biomass to roots, shoots, and leaves, and poor responses to plant competition. Both the negligible and significant growth reductions associated, respectively, with the Ile-1781-Leu and Asp-2078-Gly resistance mutations correlated with their impact on ACCase activity. Whereas the Ile-1781-Leu mutation showed no pleiotropic effects on ACCase kinetics, the Asp-2078-Gly mutation led to a significant reduction in ACCase activity. The impaired growth traits are discussed in the context of resistance costs and the effects of each resistance allele on ACCase activity. Similar effects of these two particular ACCase mutations on the ACCase activity of Alopecurus myosuroides were also confirmed.
Collapse
Affiliation(s)
- Martin M Vila-Aiub
- Australian Herbicide Resistance Initiative (AHRI) - School of Plant Biology, University of Western Australia, WA, 6009, Australia IFEVA - CONICET - Facultad de Agronomía, Universidad de Buenos Aires (UBA), Buenos Aires, 1417, Argentina
| | - Qin Yu
- Australian Herbicide Resistance Initiative (AHRI) - School of Plant Biology, University of Western Australia, WA, 6009, Australia
| | - Heping Han
- Australian Herbicide Resistance Initiative (AHRI) - School of Plant Biology, University of Western Australia, WA, 6009, Australia
| | - Stephen B Powles
- Australian Herbicide Resistance Initiative (AHRI) - School of Plant Biology, University of Western Australia, WA, 6009, Australia
| |
Collapse
|
88
|
Xia W, Pan L, Li J, Wang Q, Feng Y, Dong L. Molecular basis of ALS- and/or ACCase-inhibitor resistance in shortawn foxtail (Alopecurus aequalis Sobol.). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 122:76-80. [PMID: 26071810 DOI: 10.1016/j.pestbp.2014.12.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 12/15/2014] [Accepted: 12/16/2014] [Indexed: 05/04/2023]
Abstract
Alopecurus aequalis, a predominant weed species in wheat and oilseed rape fields, can no longer be controlled by mesosulfuron-methyl application after continuous use over several years. Based on dose-response studies, the putative resistant populations, JTJY-1 and JHHZ-1, were found to be resistant to mesosulfuron-methyl, with resistance index values of 5.5 and 14, respectively. Sensitivity assays of the mesosulfuron-methyl-resistant populations to other herbicides revealed that the JTJY-1 population had moderate or high cross resistance to sulfonylureas (SUs) and triazolopyrimidines (TPs), but displayed a low level resistance to imidazolinones (IMIs). JTJY-1 also had high multi-resistance to ACCase inhibitors, but remained susceptible to photosystem II inhibitors. The JHHZ-1 population was resistant to all ALS inhibitors tested, but was sensitive to ACCase inhibitors and photosystem II inhibitors. To clarify the molecular basis of resistance in JTJY-1 and JHHZ-1 population, the ALS and ACCase gene were sequenced. Two ALS mutations (Pro-197-Thr or Trp-574-Leu) were detected in the mesosulfuron-methyl-resistant plants. The ACCase gene analysis revealed that the resistant JTJY-1 population had an Ile-1781-Leu mutation. Furthermore, the presence of two different target site resistance (TSR) mechanisms (ALS and ACCase mutations) existing simultaneously in individual A. aequalis was firstly documented in the presented study.
Collapse
Affiliation(s)
- Wenwen Xia
- 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, Beijing, 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, Beijing, China
| | - Jun Li
- 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, Beijing, China
| | - Qiong Wang
- 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, Beijing, China
| | - Yujuan Feng
- 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, Beijing, 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, Beijing, China.
| |
Collapse
|
89
|
Matzrafi M, Lazar TW, Sibony M, Rubin B. Conyza species: distribution and evolution of multiple target-site herbicide resistances. PLANTA 2015; 242:259-67. [PMID: 25912190 DOI: 10.1007/s00425-015-2306-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 04/16/2015] [Indexed: 05/27/2023]
Abstract
Distribution of Conyza species is well correlated with human interference. Multiple herbicide resistance is caused by the attempt to overcome resistance to one mode of action by overuse of another. Conyza canadensis (CC) and Conyza bonariensis (CB) are troublesome weeds around the world. Extensive use of herbicides has led to the evolution of numerous Conyza spp. herbicide-resistant populations. Seeds of 91 CC and CB populations were collected across Israel. They were mostly found (86 %) in roadsides and urban habitats, two disturbed habitats that had been dramatically impacted by human activities, thus we classify these species as anthropogenic. Although pyrithiobac-sodium was only used in cotton fields, 90 % of Conyza spp. populations were identified as pyrithiobac-sodium resistant, suggesting possible natural resistance to pyrithiobac-sodium. CC21 and CC17 C. canadensis populations were highly resistant to all tested ALS inhibitors due to a substitution in the ALS gene from Trp574 to Leu. They were also atrazine resistant due to a substitution in the psbA gene from Ser264 to Gly. The high level of imazapyr and pyrithiobac-sodium resistance observed in the CC10 population was due to an Ala205 to Val substitution. However, high resistance to sulfometuron methyl and pyrithiobac-sodium in population CC6 was due to a point mutation at Pro197 to Ser. All resistant plants of CC21 population showed both psbA (Ser264 to Gly) and ALS (Trp574 to Leu) substitutions, leading us to the conclusion that the attempt to overcome resistance to one mode of action by overuse of another will most likely lead to multiple herbicide resistance. Furthermore, we concluded that only individuals that carry both mutations could survive the shift between the two modes of action and overcome the fitness cost associated with the PSII resistance.
Collapse
Affiliation(s)
- Maor Matzrafi
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Hebrew University of Jerusalem, PO Box 12, 7610001, Rehovot, Israel,
| | | | | | | |
Collapse
|
90
|
Development of ssDNA aptamers as potent inhibitors of Mycobacterium tuberculosis acetohydroxyacid synthase. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2015; 1854:1338-50. [PMID: 25988243 DOI: 10.1016/j.bbapap.2015.05.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 04/22/2015] [Accepted: 05/09/2015] [Indexed: 01/01/2023]
Abstract
Acetohydroxyacid synthase (AHAS) from Mycobacterium tuberculosis (Mtb) is a promising potential drug target for an emerging class of new anti-tuberculosis agents. In this study, we identify short (30-mer) single-stranded DNA aptamers as a novel class of potent inhibitors of Mtb-AHAS through an in vitro DNA-SELEX method. Among all tested aptamers, two candidate aptamers (Mtb-Apt1 and Mtb-Apt6) demonstrated the greatest inhibitory potential against Mtb-AHAS activity with IC50 values in the low nanomolar range (28.94±0.002 and 22.35±0.001 nM respectively). Interestingly, inhibition kinetics analysis of these aptamers showed different modes of enzyme inhibition (competitive and mixed type of inhibition respectively). Secondary structure-guided mutational modification analysis of Mtb-Apt1 and Mtb-Apt6 identified the minimal region responsible for their inhibitory action and consequently led to 17-mer and 20-mer shortened aptamers that retained equivalent or greater inhibitory potential. Notably, a modeling and docking exercise investigated the binding site of these two potent inhibitory aptamers on the target protein and showed possible involvement of some key catalytic dimer interface residues of AHAS in the DNA-protein interactions that lead to its potent inhibition. Importantly, these two short candidate aptamers, Mtb-Apt1 (17-mer) and Mtb-Apt6 (20-mer), also demonstrated significant growth inhibition against multidrug-resistant (MDR-TB) and extensively drug-resistant (XDR-TB) strains of tuberculosis with very low MIC of 5.36 μg/ml and 6.24 μg/ml, respectively and no significant cytotoxicity against mammalian cell line. This is the first report of functional inhibitory aptamers against Mtb-AHAS and provides the basis for development of these aptamers as novel and strong anti-tuberculosis agents.
Collapse
|
91
|
Liu W, Yuan G, Du L, Guo W, Li L, Bi Y, Wang J. A novel Pro197Glu substitution in acetolactate synthase (ALS) confers broad-spectrum resistance across ALS inhibitors. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 117:31-8. [PMID: 25619909 DOI: 10.1016/j.pestbp.2014.10.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Revised: 10/04/2014] [Accepted: 10/04/2014] [Indexed: 05/13/2023]
Abstract
Water chickweed (Myosoton aquaticum L.), a competitive broadleaf weed, is widespread in wheat fields in China. Tribenuron and pyroxsulam failed to control water chickweed in the same field in Qiaotian Village in 2011 and 2012, respectively. An initial tribenuron resistance confirmation test identified a resistant population (AH02). ALS gene sequencing revealed a previously unreported substitution of Glu for Pro at amino acid position 197 in resistant individuals. A purified subpopulation (WRR04) that was individually homozygous for the Pro197Glu substitution was generated and characterized in terms of its response to different classes of ALS inhibitors. A whole-plant experiment showed that the WRR04 population exhibited broad-spectrum resistance to tribenuron (SU, 318-fold), pyrithiobac sodium (PTB, > 197-fold), pyroxsulam (TP, 81-fold), florasulam (TP, > 36-fold) and imazethapyr (IMI, 11-fold). An in vitro ALS assay confirmed that the ALS from WRR04 showed high resistance to all the tested ALS inhibitors. These results established that the Pro197Glu substitution endows broad-spectrum resistance across ALS inhibitors in water chickweed. In addition, molecular markers were developed to rapidly identify the Pro197Glu mutation.
Collapse
Affiliation(s)
- Weitang Liu
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Guohui Yuan
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Long Du
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Wenlei Guo
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Lingxu Li
- College of Chemistry and Pharmacy Science, Qingdao Agricultural University, Qingdao 266109, Shandong, China
| | - Yaling Bi
- College of Plant Science, Anhui Science and Technology University, Fengyang 233100, Anhui, China
| | - Jinxin Wang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China.
| |
Collapse
|
92
|
Walter KL, Strachan SD, Ferry NM, Albert HH, Castle LA, Sebastian SA. Molecular and phenotypic characterization of Als1 and Als2 mutations conferring tolerance to acetolactate synthase herbicides in soybean. PEST MANAGEMENT SCIENCE 2014; 70:1831-9. [PMID: 24425499 PMCID: PMC4282486 DOI: 10.1002/ps.3725] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 01/06/2014] [Accepted: 01/08/2014] [Indexed: 05/08/2023]
Abstract
BACKGROUND Sulfonylurea (SU) herbicides are effective because they inhibit acetolactate synthase (ALS), a key enzyme in branched-chain amino acid synthesis required for plant growth. A soybean line known as W4-4 was developed through rounds of seed mutagenesis and was demonstrated to have a high degree of ALS-based resistance to both post-emergence and pre-emergence applications of a variety of SU herbicides. This report describes the molecular and phenotypic characterization of the Als1 and Als2 mutations that confer herbicide resistance to SUs and other ALS inhibitors. RESULTS The mutations are shown to occur in two different ALS genes that reside on different chromosomes: Als1 (P178S) on chromosome 4 and Als2 (W560L) on chromosome 6 (P197S and W574L in Arabidopsis thaliana). CONCLUSION Although the Als1 and Als2 genes are unlinked, the combination of these two mutations is synergistic for improved tolerance of soybeans to ALS-inhibiting herbicides.
Collapse
Affiliation(s)
| | - Stephen D Strachan
- DuPont Crop Protection, DuPont Stine-Haskell Research CenterNewark, DE, USA
| | - Nancy M Ferry
- DuPont Crop Protection, DuPont Stine-Haskell Research CenterNewark, DE, USA
| | | | | | | |
Collapse
|
93
|
Yu Q, Powles SB. Resistance to AHAS inhibitor herbicides: current understanding. PEST MANAGEMENT SCIENCE 2014; 70:1340-50. [PMID: 24338926 DOI: 10.1002/ps.3710] [Citation(s) in RCA: 186] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 12/08/2013] [Accepted: 12/14/2013] [Indexed: 05/04/2023]
Abstract
Acetohydroxyacid synthase (AHAS) inhibitor herbicides currently comprise the largest site-of-action group (with 54 active ingredients across five chemical groups) and have been widely used in world agriculture since they were first introduced in 1982. Resistance evolution in weeds to AHAS inhibitors has been rapid and identified in populations of many weed species. Often, evolved resistance is associated with point mutations in the target AHAS gene; however non-target-site enhanced herbicide metabolism occurs as well. Many AHAS gene resistance mutations can occur and be rapidly enriched owing to a high initial resistance gene frequency, simple and dominant genetic inheritance and lack of major fitness cost of the resistance alleles. Major advances in the elucidation of the crystal structure of the AHAS (Arabidopsis thaliana) catalytic subunit in complex with various AHAS inhibitor herbicides have greatly improved current understanding of the detailed molecular interactions between AHAS, cofactors and herbicides. Compared with target-site resistance, non-target-site resistance to AHAS inhibitor herbicides is less studied and hence less understood. In a few well-studied cases, non-target-site resistance is due to enhanced rates of herbicide metabolism (metabolic resistance), mimicking that occurring in tolerant crop species and often involving cytochrome P450 monooxygenases. However, the specific herbicide-metabolising, resistance-endowing genes are yet to be identified in resistant weed species. The current state of mechanistic understanding of AHAS inhibitor herbicide resistance is reviewed, and outstanding research issues are outlined.
Collapse
Affiliation(s)
- Qin Yu
- Australian Herbicide Resistance Initiative, School of Plant Biology, University of Western Australia, Crawley, WA, Australia
| | | |
Collapse
|
94
|
Neve P, Busi R, Renton M, Vila-Aiub MM. Expanding the eco-evolutionary context of herbicide resistance research. PEST MANAGEMENT SCIENCE 2014; 70:1385-93. [PMID: 24723489 DOI: 10.1002/ps.3757] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 01/29/2014] [Accepted: 01/29/2014] [Indexed: 05/26/2023]
Abstract
The potential for human-driven evolution in economically and environmentally important organisms in medicine, agriculture and conservation management is now widely recognised. The evolution of herbicide resistance in weeds is a classic example of rapid adaptation in the face of human-mediated selection. Management strategies that aim to slow or prevent the evolution of herbicide resistance must be informed by an understanding of the ecological and evolutionary factors that drive selection in weed populations. Here, we argue for a greater focus on the ultimate causes of selection for resistance in herbicide resistance studies. The emerging fields of eco-evolutionary dynamics and applied evolutionary biology offer a means to achieve this goal and to consider herbicide resistance in a broader and sometimes novel context. Four relevant research questions are presented, which examine (i) the impact of herbicide dose on selection for resistance, (ii) plant fitness in herbicide resistance studies, (iii) the efficacy of herbicide rotations and mixtures and (iv) the impacts of gene flow on resistance evolution and spread. In all cases, fundamental ecology and evolution have the potential to offer new insights into herbicide resistance evolution and management.
Collapse
Affiliation(s)
- Paul Neve
- School of Life Sciences, University of Warwick, Coventry, UK
| | | | | | | |
Collapse
|
95
|
Ochogavía AC, Breccia G, Vega T, Felitti SA, Picardi LA, Nestares G. Acetohydroxyacid synthase activity and transcripts profiling reveal tissue-specific regulation of ahas genes in sunflower. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2014; 224:144-150. [PMID: 24908515 DOI: 10.1016/j.plantsci.2014.04.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 04/22/2014] [Accepted: 04/29/2014] [Indexed: 06/03/2023]
Abstract
Acetohydroxyacid synthase (AHAS) is the target site of several herbicides and catalyses the first step in the biosynthesis of branched chain amino acid. Three genes coding for AHAS catalytic subunit (ahas1, ahas2 and ahas3) have been reported for sunflower. The aim of this work was to study the expression pattern of ahas genes family and AHAS activity in sunflower (Helianthus annuus L.). Different organs (leaves, hypocotyls, roots, flowers and embryos) were evaluated at several developmental stages. The transcriptional profile was studied through RT-qPCR. The highest expression for ahas1 was shown in leaves, where all the induced and natural gene mutations conferring herbicide resistance were found. The maximal expression of ahas2 and ahas3 occurred in immature flowers and embryos. The highest AHAS activity was found in leaves and immature embryos. Correlation analysis among ahas gene expression and AHAS activity was discussed. Our results show that differences in ahas genes expression are tissue-specific and temporally regulated. Moreover, the conservation of multiple AHAS isoforms in sunflower seems to result from different expression requirements controlled by tissue-specific regulatory mechanisms at different developmental stages.
Collapse
Affiliation(s)
- Ana C Ochogavía
- Laboratorio de Biología Molecular, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina; CONICET, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina.
| | - Gabriela Breccia
- Cátedra de Genética, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina; CONICET, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina
| | - Tatiana Vega
- Cátedra de Genética, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina; CONICET, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina
| | - Silvina A Felitti
- Laboratorio de Biología Molecular, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina; CONICET, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina
| | - Liliana A Picardi
- Cátedra de Genética, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina; CIUNR, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina
| | - Graciela Nestares
- Cátedra de Genética, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, CC 14, S2125ZAA Zavalla, Argentina
| |
Collapse
|
96
|
Deng W, Cao Y, Yang Q, Liu MJ, Mei Y, Zheng MQ. Different cross-resistance patterns to AHAS herbicides of two tribenuron-methyl resistant flixweed (Descurainiasophia L.) biotypes in China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2014; 112:26-32. [PMID: 24974114 DOI: 10.1016/j.pestbp.2014.05.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 05/21/2014] [Accepted: 05/21/2014] [Indexed: 06/03/2023]
Abstract
Flixweed (Descurainiasophia L.) is a troublesome weed in winter wheat fields in China. Two flixweed accessions, HB08 and HB16 with a Pro-197-Leu and Pro-197-Ser AHAS-mutation respectively, have evolved very high levels resistance to sulfonylurea (SU) herbicide, tribenuron-methyl. Cross resistance of HB08 and HB16 to AHAS herbicides of SU, imidazolinone (IMI), triazolopyrimidine (TP) and pyrimidinyl-thiobenozoate (PTB) families was investigated by dose-response experiments. In addition, the effects of AHAS herbicides on the activity of AHAS extracted from HB08 and HB16 plants were evaluated. HB16 exhibited cross resistance to SU herbicides halosulfuron-methyl and triasulfuron, TP herbicides flumetsulam and penoxsulam, but displayed more sensitivity to IMI herbicide imazethapyr. By contrast, HB08 only showed cross resistance to SU herbicides halosulfuron-methyl and triasulfuron. The in vitro sensitivity of AHAS to AHAS herbicides is consistent with the results of dose-response experiments and the estimated Pearson's r values for HB08 and HB16 are 0.996 and 0.912 respectively. These indicated that altered AHAS sensitivity was responsible mainly for cross resistance patterns observed in the two resistant biotypes.
Collapse
Affiliation(s)
- Wei Deng
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Yuan Cao
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Qian Yang
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Ming Jie Liu
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Yu Mei
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China
| | - Ming Qi Zheng
- Department of Applied Chemistry, China Agricultural University, No. 2 of Yuan Ming Yuan Xilu, Haidian District, Beijing 100193, China.
| |
Collapse
|
97
|
Vila-Aiub MM, Goh SS, Gaines TA, Han H, Busi R, Yu Q, Powles SB. No fitness cost of glyphosate resistance endowed by massive EPSPS gene amplification in Amaranthus palmeri. PLANTA 2014; 239:793-801. [PMID: 24385093 DOI: 10.1007/s00425-013-2022-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Accepted: 12/09/2013] [Indexed: 05/24/2023]
Abstract
Amplification of the EPSPS gene has been previously identified as the glyphosate resistance mechanism in many populations of Amaranthus palmeri, a major weed pest in US agriculture. Here, we evaluate the effects of EPSPS gene amplification on both the level of glyphosate resistance and fitness cost of resistance. A. palmeri individuals resistant to glyphosate by expressing a wide range of EPSPS gene copy numbers were evaluated under competitive conditions in the presence or absence of glyphosate. Survival rates to glyphosate and fitness traits of plants under intra-specific competition were assessed. Plants with higher amplification of the EPSPS gene (53-fold) showed high levels of glyphosate resistance, whereas less amplification of the EPSPS gene (21-fold) endowed a lower level of glyphosate resistance. Without glyphosate but under competitive conditions, plants exhibiting up to 76-fold EPSPS gene amplification exhibited similar height, and biomass allocation to vegetative and reproductive organs, compared to glyphosate susceptible A. palmeri plants with no amplification of the EPSPS gene. Both the additive effects of EPSPS gene amplification on the level of glyphosate resistance and the lack of associated fitness costs are key factors contributing to EPSPS gene amplification as a widespread and important glyphosate resistance mechanism likely to become much more evident in weed plant species.
Collapse
Affiliation(s)
- Martin M Vila-Aiub
- Australian Herbicide Resistance Initiative (AHRI)-School of Plant Biology, University of Western Australia (UWA), Crawley, WA, Australia,
| | | | | | | | | | | | | |
Collapse
|
98
|
Chandler SF, Senior M, Nakamura N, Tsuda S, Tanaka Y. Expression of flavonoid 3',5'-hydroxylase and acetolactate synthase genes in transgenic carnation: assessing the safety of a nonfood plant. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:11711-11720. [PMID: 23646984 DOI: 10.1021/jf4004384] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
For 16 years, genetically modified flowers of carnation ( Dianthus caryophyllus ) have been sold to the floristry industry. The transgenic carnation carries a herbicide tolerance gene (a mutant gene encoding acetolactate synthase (ALS)) and has been modified to produce delphinidin-based anthocyanins in flowers, which conventionally bred carnation cannot produce. The modified flower color has been achieved by introduction of a gene encoding flavonoid 3',5'-hydroxylase (F3'5'H). Transgenic carnation flowers are produced in South America and are primarily distributed to North America, Europe, and Japan. Although a nonfood crop, the release of the genetically modified carnation varieties required an environmental risk impact assessment and an assessment of the potential for any increased risk of harm to human or animal health compared to conventionally bred carnation. The results of the health safety assessment and the experimental studies that accompanied them are described in this review. The conclusion from the assessments has been that the release of genetically modified carnation varieties which express F3'5'H and ALS genes and which accumulate delphinidin-based anthocyanins do not pose an increased risk of harm to human or animal health.
Collapse
Affiliation(s)
- Stephen F Chandler
- School of Applied Sciences, RMIT University , P.O. Box 71, Bundoora, VIC 3083, Australia
| | | | | | | | | |
Collapse
|
99
|
Délye C, Jasieniuk M, Le Corre V. Deciphering the evolution of herbicide resistance in weeds. Trends Genet 2013; 29:649-58. [DOI: 10.1016/j.tig.2013.06.001] [Citation(s) in RCA: 349] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 05/17/2013] [Accepted: 06/03/2013] [Indexed: 11/27/2022]
|
100
|
He Y, Niu C, Wen X, Xi Z. Molecular Drug Resistance Prediction for Acetohydroxyacid Synthase Mutants Against Chlorsulfuron Using MB-QSAR. CHINESE J CHEM 2013. [DOI: 10.1002/cjoc.201300417] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|