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Zheng BF, Zuo Y, Yang WY, Liu H, Wu QY, Yang GF. Design, Synthesis, and Biological Evaluation of Pyridazinone-Containing Derivatives As Novel Protoporphyrinogen IX Oxidase Inhibitor. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:10772-10780. [PMID: 38703122 DOI: 10.1021/acs.jafc.3c09157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2024]
Abstract
Protoporphyrinogen IX oxidase (PPO, E.C. 1.3.3.4) plays a pivotal role in chlorophyll biosynthesis in plants, making it a prime target for herbicide development. In this study, we conducted an investigation aimed at discovering PPO-inhibiting herbicides. Through this endeavor, we successfully identified a series of novel compounds based on the pyridazinone scaffold. Following structural optimization and biological assessment, compound 10ae, known as ethyl 3-((6-fluoro-5-(6-oxo-4-(trifluoromethyl)pyridazin-1(6H)-yl)benzo[d]thiazol-2-yl)thio)propanoate, emerged as a standout performer. It exhibited robust activity against Nicotiana tabacum PPO (NtPPO) with an inhibition constant (Ki) value of 0.0338 μM. Concurrently, we employed molecular simulations to obtain further insight into the binding mechanism with NtPPO. Additionally, another compound, namely, ethyl 2-((6-fluoro-5-(5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1(6H)-yl)benzo[d]thiazol-2-yl)thio)propanoate (10bh), demonstrated broad-spectrum and highly effective herbicidal properties against all six tested weeds (Leaf mustard, Chickweed, Chenopodium serotinum, Alopecurus aequalis, Poa annua, and Polypogon fugax) at the dosage of 150 g a.i./ha through postemergence application in a greenhouse. This work identified a novel lead compound (10bh) that showed good activity in vitro and excellent herbicidal activity in vivo and had promising prospects as a new PPO-inhibiting herbicide lead.
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Affiliation(s)
- Bai-Feng Zheng
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, China
| | - Yang Zuo
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, China
| | - Wen-Yi Yang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, China
| | - Hui Liu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, China
| | - Qiong-You Wu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, China
| | - Guang-Fu Yang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, China
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2
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Wittmann DT, Peter FE, Strätker SM, Ortega-Rodés P, Grimm B, Hedtke B. Dual plastid targeting of protoporphyrinogen oxidase 2 in Amaranthaceae promotes herbicide tolerance. PLANT PHYSIOLOGY 2024; 195:713-727. [PMID: 38330186 PMCID: PMC11060682 DOI: 10.1093/plphys/kiae062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 01/02/2024] [Accepted: 01/03/2024] [Indexed: 02/10/2024]
Abstract
Plant tetrapyrrole biosynthesis (TPB) takes place in plastids and provides the chlorophyll and heme required for photosynthesis and many redox processes throughout plant development. TPB is strictly regulated, since accumulation of several intermediates causes photodynamic damage and cell death. Protoporphyrinogen oxidase (PPO) catalyzes the last common step before TPB diverges into chlorophyll and heme branches. Land plants possess two PPO isoforms. PPO1 is encoded as a precursor protein with a transit peptide, but in most dicotyledonous plants PPO2 does not possess a cleavable N-terminal extension. Arabidopsis (Arabidopsis thaliana) PPO1 and PPO2 localize in chloroplast thylakoids and envelope membranes, respectively. Interestingly, PPO2 proteins in Amaranthaceae contain an N-terminal extension that mediates their import into chloroplasts. Here, we present multiple lines of evidence for dual targeting of PPO2 to thylakoid and envelope membranes in this clade and demonstrate that PPO2 is not found in mitochondria. Transcript analyses revealed that dual targeting in chloroplasts involves the use of two transcription start sites and initiation of translation at different AUG codons. Among eudicots, the parallel accumulation of PPO1 and PPO2 in thylakoid membranes is specific for the Amaranthaceae and underlies PPO2-based herbicide resistance in Amaranthus species.
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Affiliation(s)
- Daniel T Wittmann
- Institute of Biology/Plant Physiology, Humboldt-Universität zu Berlin, Philippstr. 13 (Building 12), 10115 Berlin, Germany
| | - Franziska E Peter
- Institute of Biology/Plant Physiology, Humboldt-Universität zu Berlin, Philippstr. 13 (Building 12), 10115 Berlin, Germany
| | - Sarah Melissa Strätker
- Institute of Biology/Plant Physiology, Humboldt-Universität zu Berlin, Philippstr. 13 (Building 12), 10115 Berlin, Germany
| | - Patricia Ortega-Rodés
- Institute of Biology/Plant Physiology, Humboldt-Universität zu Berlin, Philippstr. 13 (Building 12), 10115 Berlin, Germany
- Lab. Fisiología Vegetal, Dpto. Biología Vegetal, Facultad de Biología, Universidad de La Habana, 10400 La Habana, Cuba
| | - Bernhard Grimm
- Institute of Biology/Plant Physiology, Humboldt-Universität zu Berlin, Philippstr. 13 (Building 12), 10115 Berlin, Germany
| | - Boris Hedtke
- Institute of Biology/Plant Physiology, Humboldt-Universität zu Berlin, Philippstr. 13 (Building 12), 10115 Berlin, Germany
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3
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Cai H, Zhang X, Ling D, Zhang M, Pang C, Chen Z, Jin Z, Ren SC, Chi YR. Discovery of Pyridyl-Benzothiazol Hybrids as Novel Protoporphyrinogen Oxidase Inhibitors via Scaffold Hopping. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 38593435 DOI: 10.1021/acs.jafc.3c08596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
In order to discover novel protoporphyrinogen oxidase (PPO) inhibitors with excellent herbicidal activity, a series of structurally novel 6-(pyridin-2-yl) benzothiazole derivatives were designed based on the scaffold hopping strategy. The in vitro experiments demonstrated that the newly synthesized compounds exhibited noteworthy inhibitory activity against Arabidopsis thaliana PPO (AtPPO), with IC50 values ranging from 0.06 to 1.36 μM. Preliminary postemergence herbicidal activity tests and crop safety studies indicated that some of our compounds exhibited excellent herbicidal activity and crop safety. For instance, compound (rac)-7as exhibited superior herbicidal activities to commercially available flumioxazin (FLU) and saflufenacil (SAF) at all the tested concentrations and showed effective herbicidal activities even at a dosage as low as 18.75 g ai/ha. Meanwhile, compound (rac)-7as showed good crop safety for wheat at a dosage as high as 150 g of ai/ha. Although the absolute configuration of compound 7as has no obvious effect on its herbicidal activity, compound (R)-7as showed a slightly higher crop safety than compound (S)-7as. Molecular simulation studies of Nicotiana tabacum PPO (NtPPO) and our candidate compounds showed that the benzothiazole moiety of compounds (R)-7as or (S)-7as formed multiple π-π stacking interactions with FAD, and the pyridine ring generated π-π stacking with Phe-392. Our finding proved that the pyridyl-benzothiazol hybrids are promising scaffolds for the development of PPO-inhibiting herbicides.
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Affiliation(s)
- Hui Cai
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Xiao Zhang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Dan Ling
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Meng Zhang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Chen Pang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Zhongyin Chen
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Zhichao Jin
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Shi-Chao Ren
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Yonggui Robin Chi
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
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4
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Alnafta N, Beffa R, Bojack G, Bollenbach-Wahl B, Brant NZ, Dörnbrack C, Dorn N, Freigang J, Gatzweiler E, Getachew R, Hartfiel C, Heinemann I, Helmke H, Hohmann S, Jakobi H, Lange G, Lümmen P, Willms L, Frackenpohl J. Designing New Protoporphyrinogen Oxidase-Inhibitors Carrying Potential Side Chain Isosteres to Enhance Crop Safety and Spectrum of Activity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:18270-18284. [PMID: 37269295 DOI: 10.1021/acs.jafc.3c01420] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
There are several methods to control weeds, which impose particular challenges for farmers in all parts of the world, although applying small molecular compounds still remains the most efficient technology to date. However, plants can evolve to become resistant toward active ingredients which is also the case for protoporphyrinogen oxidase (PPO) inhibitors, a class of highly effective herbicides in use for more than 50 years. Hence, it is essential to continuously discover and develop new herbicidal PPO inhibitors with enhanced intrinsic activity, an improved resistance profile, enhanced crop safety, favorable physicochemical properties, and a clean toxicological profile. By modifying structural key features from known PPO inhibitors such as tiafenacil, inspired by isostere and mix&match concepts in combination with modeling investigations based on a wild-type Amaranthus crystal structure, we have found new promising lead structures showing strong activity in vitro and in vivo against several notorious dicotyledon and monocotyledon weeds with emerging resistance (e.g., Amaranthus palmeri, Amaranthus tuberculatus, Lolium rigidum, and Alopecurus myosuroides). While several phenyl uracils carrying an isoxazoline motif in their thio-linked side chain showed promising resistance-breaking potential against different Amaranthus species, introducing a thioacrylamide side chain afforded outstanding efficacy against resistant grass weeds.
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Affiliation(s)
- Neanne Alnafta
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Roland Beffa
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Guido Bojack
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Birgit Bollenbach-Wahl
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Nicola Z Brant
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Christine Dörnbrack
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Nicole Dorn
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Jörg Freigang
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Elmar Gatzweiler
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Rahel Getachew
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Claudia Hartfiel
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Ines Heinemann
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Hendrik Helmke
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Sabine Hohmann
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Harald Jakobi
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Gudrun Lange
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Peter Lümmen
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Lothar Willms
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
| | - Jens Frackenpohl
- Research and Development, Weed Control Chemistry, Crop Science Division, Bayer AG, Industriepark Höchst, 65926 Frankfurt am Main, Germany
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5
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Zheng BF, Zuo Y, Huang GY, Wang ZZ, Ma JY, Wu QY, Yang GF. Synthesis and Biological Activity Evaluation of Benzoxazinone-Pyrimidinedione Hybrids as Potent Protoporphyrinogen IX Oxidase Inhibitor. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:14221-14231. [PMID: 37729497 DOI: 10.1021/acs.jafc.3c03593] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Protoporphyrinogen IX oxidase (PPO/Protox, E.C. 1.3.3.4) is recognized as one of the most important targets for herbicide discovery. In this study, we report our ongoing research efforts toward the discovery of novel PPO inhibitors. Specifically, we identified a highly potent new compound series containing a pyrimidinedione moiety and bearing a versatile building block-benzoxazinone scaffold. Systematic bioassays resulted in the discovery of compound 7af, ethyl 4-(7-fluoro-6-(3-methyl-2,6-dioxo-4-(trifluoromethyl)-3,6-dihydropyrimidin-1(2H)-yl)-3-oxo-2,3-dihydro-4H-benzo[b][1,4]oxazin-4-yl)butanoate, which exhibited broad-spectrum and excellent herbicidal activity at the dosage of 37.5 g a.i./ha through postemergence application. The inhibition constant (Ki) value of 7af to Nicotiana tabacum PPO (NtPPO) was 14 nM, while to human PPO (hPPO), it was 44.8 μM, indicating a selective factor of 3200, making it the most selective PPO inhibitor to date. Moreover, molecular simulations further demonstrated the selectivity and the binding mechanism of 7af to NtPPO and hPPO. This study not only identifies a candidate that showed excellent in vivo bioactivity and high safety toward humans but also provides a paradigm for discovering PPO inhibitors with improved performance through molecular simulation and structure-guided optimization.
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Affiliation(s)
- Bai-Feng Zheng
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
| | - Yang Zuo
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
| | - Guang-Yi Huang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
| | - Zhi-Zheng Wang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
| | - Jin-Yi Ma
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
| | - Qiong-You Wu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
| | - Guang-Fu Yang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan 430079, P. R. China
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Cao S, Zou Y, Zhang S, Zhang H, Guan Y, Liu L, Ji M. Investigation of resistance mechanisms to fomesafen in Ipomoea nil from China. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 194:105487. [PMID: 37532349 DOI: 10.1016/j.pestbp.2023.105487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/30/2023] [Accepted: 06/01/2023] [Indexed: 08/04/2023]
Abstract
Recently, the herbicide fomesafen has frequently failed to control the troublesome weed Ipomoea nil in soybean fields in Liaoning Province, China. Hence, we collected 10 suspected resistant populations and evaluated their sensitivity to fomesafen. The results revealed various degrees of Ipomoea nil resistance to fomesafen, with a resistance index of 2.88 to 22.43; the highest value occurred in the LN3 population. Therefore, the mechanisms of the resistance in LN3 to fomesafen were explored. After fomesafen treatment, the expression levels of InPPX1 and InPPX2 genes were 4.19- and 9.29-fold higher, respectively, in LN3 than those in the susceptible (LN1) population. However, mutations and copy number variations were not detected between the two populations. Additionally, malathion pretreatment reduced the dose necessary to halve the growth rate of LN3 by 58%. Liquid chromatography with tandem mass spectrometry demonstrated that metabolism of fomesafen was significantly suppressed by malathion. Moreover, LN3 displayed increased reactive oxygen species scavenging capacity, which was represented by higher superoxide dismutase and peroxidase activities after fomesafen application than those in LN1. An orthogonal partial least squares-discriminant analysis revealed that the high resistance in LN3 could be attributed mainly to enhanced metabolism. Fortunately, the fomesafen-resistant I. nil remained sensitive to 2,4-D-ethylhexylester and bentazon, providing methods for its control.
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Affiliation(s)
- Shihan Cao
- College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China
| | - Yize Zou
- College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China
| | - Shuai Zhang
- National Agro-technology Extension and Service Center, No. 20, Maizidian street, Chaoyang district, Beijing City 100125, People's Republic of China.
| | - Hongtao Zhang
- College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China
| | - Yidi Guan
- College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China
| | - Liru Liu
- College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China
| | - Mingshan Ji
- College of Plant Protection, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang City 110866, People's Republic of China.
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7
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Draga S, Gabelli G, Palumbo F, Barcaccia G. Genome-Wide Datasets of Chicories ( Cichorium intybus L.) for Marker-Assisted Crop Breeding Applications: A Systematic Review and Meta-Analysis. Int J Mol Sci 2023; 24:11663. [PMID: 37511422 PMCID: PMC10380310 DOI: 10.3390/ijms241411663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
Cichorium intybus L. is the most economically important species of its genus and among the most important of the Asteraceae family. In chicory, many linkage maps have been produced, several sets of mapped and unmapped markers have been developed, and dozens of genes linked to traits of agronomic interest have been investigated. This treasure trove of information, properly cataloged and organized, is of pivotal importance for the development of superior commercial products with valuable agronomic potential in terms of yield and quality, including reduced bitter taste and increased inulin production, as well as resistance or tolerance to pathogens and resilience to environmental stresses. For this reason, a systematic review was conducted based on the scientific literature published in chicory during 1980-2023. Based on the results obtained from the meta-analysis, we created two consensus maps capable of supporting marker-assisted breeding (MAB) and marker-assisted selection (MAS) programs. By taking advantage of the recently released genome of C. intybus, we built a 639 molecular marker-based consensus map collecting all the available mapped and unmapped SNP and SSR loci available for this species. In the following section, after summarizing and discussing all the genes investigated in chicory and related to traits of interest such as reproductive barriers, sesquiterpene lactone biosynthesis, inulin metabolism and stress response, we produced a second map encompassing 64 loci that could be useful for MAS purposes. With the advent of omics technologies, molecular data chaos (namely, the situation where the amount of molecular data is so complex and unmanageable that their use becomes challenging) is becoming far from a negligible issue. In this review, we have therefore tried to contribute by standardizing and organizing the molecular data produced thus far in chicory to facilitate the work of breeders.
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Affiliation(s)
| | | | - Fabio Palumbo
- Department of Agronomy Food Natural Resources Animals Environment, Campus of Agripolis, University of Padova, 35020 Legnaro, Italy; (S.D.); (G.G.)
| | - Gianni Barcaccia
- Department of Agronomy Food Natural Resources Animals Environment, Campus of Agripolis, University of Padova, 35020 Legnaro, Italy; (S.D.); (G.G.)
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8
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Huang J, Lin Q, Fei H, He Z, Xu H, Li Y, Qu K, Han P, Gao Q, Li B, Liu G, Zhang L, Hu J, Zhang R, Zuo E, Luo Y, Ran Y, Qiu JL, Zhao KT, Gao C. Discovery of deaminase functions by structure-based protein clustering. Cell 2023:S0092-8674(23)00593-7. [PMID: 37379837 DOI: 10.1016/j.cell.2023.05.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/24/2023] [Accepted: 05/26/2023] [Indexed: 06/30/2023]
Abstract
The elucidation of protein function and its exploitation in bioengineering have greatly advanced the life sciences. Protein mining efforts generally rely on amino acid sequences rather than protein structures. We describe here the use of AlphaFold2 to predict and subsequently cluster an entire protein family based on predicted structure similarities. We selected deaminase proteins to analyze and identified many previously unknown properties. We were surprised to find that most proteins in the DddA-like clade were not double-stranded DNA deaminases. We engineered the smallest single-strand-specific cytidine deaminase, enabling efficient cytosine base editor (CBE) to be packaged into a single adeno-associated virus (AAV). Importantly, we profiled a deaminase from this clade that edits robustly in soybean plants, which previously was inaccessible to CBEs. These discovered deaminases, based on AI-assisted structural predictions, greatly expand the utility of base editors for therapeutic and agricultural applications.
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Affiliation(s)
- Jiaying Huang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Qiupeng Lin
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Hongyuan Fei
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Zixin He
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Hu Xu
- Qi Biodesign, Beijing, China
| | - Yunjia Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Kunli Qu
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, BGI-Shenzhen, Qingdao, China
| | - Peng Han
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, BGI-Shenzhen, Qingdao, China
| | | | - Boshu Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Guanwen Liu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
| | | | - Jiacheng Hu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Rui Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Erwei Zuo
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
| | - Yonglun Luo
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, BGI-Shenzhen, Qingdao, China; Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark
| | | | - Jin-Long Qiu
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, China
| | | | - Caixia Gao
- State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Genome Editing, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China; College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China.
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9
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Mattison RL, Beffa R, Bojack G, Bollenbach-Wahl B, Dörnbrack C, Dorn N, Freigang J, Gatzweiler E, Getachew R, Hartfiel C, Heinemann I, Helmke H, Hohmann S, Jakobi H, Lange G, Lümmen P, Willms L, Frackenpohl J. Design, synthesis and screening of herbicidal activity for new phenyl pyrazole-based protoporphyrinogen oxidase-inhibitors (PPO) overcoming resistance issues. PEST MANAGEMENT SCIENCE 2023; 79:2264-2280. [PMID: 36815643 DOI: 10.1002/ps.7425] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 12/19/2022] [Accepted: 02/23/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND Whilst there are several methods to control weeds, which continuously plague farmers around the globe, the application of small molecular compounds is still the most effective technology to date. Plants can evolve to become resistant to PPO-inhibitors, a class of herbicides in commercial use since the 1960s. It is therefore essential to continuously develop new herbicides based on this mode-of-action with enhanced intrinsic activity, an improved resistance profile and favourable physicochemical properties. Based on an Amaranthus PPO crystal structure and subsequent modelling studies, halogen-substituted pyrazoles have been investigated as isosteres of uracil-based PPO-inhibitors. RESULTS By combining structural features from the commercial PPO-inhibitors tiafenacil and pyraflufen-ethyl and by investigating receptor-binding properties, we identified new promising pyrazole-based lead structures showing strong activity in vitro and in vivo against economically important weeds of the Amaranthus genus: A. retroflexus, and resistant A. palmeri and A. tuberculatus. CONCLUSION The present work covers a series of novel PPO-inhibiting compounds that contain a pyrazole ring and a substituted thioacetic acid sidechain attached to the core phenyl group. These compounds show good receptor fit in line with excellent herbicidal activity against weeds that plague corn and rice crops with low application rates. This, in combination with promising selectivity in corn, have the potential to mitigate and affect weeds that have become resistant to some of the current market standards. Remarkably, some of the novel PPO-inhibitors outlined herein show efficacies against economically important weeds that were superior to recently commercialized and structurally related tiafenacil. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Rebecca L Mattison
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Roland Beffa
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Guido Bojack
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Birgit Bollenbach-Wahl
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Christine Dörnbrack
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Nicole Dorn
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Jörg Freigang
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Elmar Gatzweiler
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Rahel Getachew
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Claudia Hartfiel
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Ines Heinemann
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Hendrik Helmke
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Sabine Hohmann
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Harald Jakobi
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Gudrun Lange
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Peter Lümmen
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Lothar Willms
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
| | - Jens Frackenpohl
- Research & Development, Weed Control, Division Crop Science, Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
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Yang C, Wang H, Duan Y, Bei F, Jia S, Wang J, Wang H, Liu W. Enhanced Herbicide Metabolism and Target-Site Mutations Confer Multiple Resistance to Fomesafen and Nicosulfuron in Amaranthus retroflexus L. BIOLOGY 2023; 12:biology12040592. [PMID: 37106792 PMCID: PMC10135446 DOI: 10.3390/biology12040592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/08/2023] [Accepted: 04/11/2023] [Indexed: 04/29/2023]
Abstract
Amaranthus retroflexus L. is a highly competitive broadleaf weed of corn-soybean rotation in northeastern China. In recent years, the herbicide(s) resistance evolution has been threatening its effective management in crop fields. One resistant A. retroflexus (HW-01) population that survived the protoporphyrinogen oxidase (PPO) inhibitor fomesafen and acetolactate synthase (ALS) inhibitor nicosulfuron applied at their field-recommended rate was collected from a soybean field in Wudalianchi City, Heilongjiang Province. This study aimed to investigate the resistance mechanisms of fomesafen and nicosulfuron and determine the resistance profile of HW-01 to other herbicides. Whole plant dose-response bioassays revealed that HW-01 had evolved resistance to fomesafen (50.7-fold) and nicosulfuron (5.2-fold). Gene sequencing showed that the HW-01 population has a mutation in PPX2 (Arg-128-Gly) and a rare mutation in ALS (Ala-205-Val, eight/twenty mutations/total plants). In vitro enzyme activity assays showed that ALS extracted from the HW-01 plants was less sensitive to nicosulfuron (3.2-fold) than ST-1 plants. Pre-treatment with the cytochrome P450 inhibitors malathion, piperonyl butoxide (PBO), 3-amino-1,2,4-triazole (amitrole), and the GSTs inhibitor 4-chloro-7-nitrobenzofurazan (NBD-Cl) significantly increased fomesafen and nicosulfuron sensitivity in the HW-01 population compared with that of the sensitive (S) population ST-1. Moreover, the rapid fomesafen and nicosulfuron metabolism in the HW-01 plants was also confirmed via HPLC-MS/MS analysis. Furthermore, the HW-01 population showed multiple resistance (MR) to PPO, ALS, and PSII inhibitors, with resistance index (RI) values ranging from 3.8 to 9.6. This study confirmed MR to PPO-, ALS-, and PSII-inhibiting herbicides in the A. retroflexus population HW-01, as well as confirming that the cytochrome P450- and GST-based herbicide metabolic along with TSR mechanisms contribute to their multiple resistance to fomesafen and nicosulfuron.
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Affiliation(s)
- Cheng Yang
- College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Hao Wang
- College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Yunxia Duan
- College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Feng Bei
- Tai'an Customs, Tai'an 271000, China
| | - Sisi Jia
- Tai'an Customs, Tai'an 271000, China
| | - Jinxin Wang
- College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Hengzhi Wang
- College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Weitang Liu
- College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
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11
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Cao Y, Lan Y, Huang H, Wei S, Li X, Sun Y, Wang R, Huang Z. Molecular Characterization of Resistance to Nicosulfuron in Setaria viridis. Int J Mol Sci 2023; 24:ijms24087105. [PMID: 37108267 PMCID: PMC10138712 DOI: 10.3390/ijms24087105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/04/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
The green foxtail, Setaria viridis (L.) P. Beauv. (Poales: Poaceae), is a troublesome and widespread grass weed in China. The acetolactate synthase (ALS)-inhibiting herbicide nicosulfuron has been intensively used to manage S. viridis, and this has substantially increased the selection pressure. Here we confirmed a 35.8-fold resistance to nicosulfuron in an S. viridis population (R376 population) from China and characterized the resistance mechanism. Molecular analyses revealed an Asp-376-Glu mutation of the ALS gene in the R376 population. The participation of metabolic resistance in the R376 population was proved by cytochrome P450 monooxygenases (P450) inhibitor pre-treatment and metabolism experiments. To further elucidate the mechanism of metabolic resistance, eighteen genes that could be related to the metabolism of nicosulfuron were obtained bythe RNA sequencing. The results of quantitative real-time PCR validation indicated that three ATP-binding cassette (ABC) transporters (ABE2, ABC15, and ABC15-2), four P450 (C76C2, CYOS, C78A5, and C81Q32), and two UDP-glucosyltransferase (UGT) (UGT13248 and UGT73C3), and one glutathione S-transferases (GST) (GST3) were the major candidates that contributed to metabolic nicosulfuron resistance in S. viridis. However, the specific role of these ten genes in metabolic resistance requires more research. Collectively, ALS gene mutations and enhanced metabolism may be responsible for the resistance of R376 to nicosulfuron.
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Affiliation(s)
- Yi Cao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yuning Lan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Hongjuan Huang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Shouhui Wei
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xiangju Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Ying Sun
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Ruolin Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Zhaofeng Huang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
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12
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Porri A, Betz M, Seebruck K, Knapp M, Johnen P, Witschel M, Aponte R, Liebl R, Tranel PJ, Lerchl J. Inhibition profile of trifludimoxazin towards PPO2 target site mutations. PEST MANAGEMENT SCIENCE 2023; 79:507-519. [PMID: 36178376 PMCID: PMC10092844 DOI: 10.1002/ps.7216] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 09/24/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Target site resistance to herbicides that inhibit protoporphyrinogen IX oxidase (PPO; EC 1.3.3.4) has been described mainly in broadleaf weeds based on mutations in the gene designated protoporphyrinogen oxidase 2 (PPO2) and in one monocot weed species in protoporphyrinogen oxidase 1 (PPO1). To control PPO target site resistant weeds in future it is important to design new PPO-inhibiting herbicides that can control problematic weeds expressing mutant PPO enzymes. In this study, we assessed the efficacy of a new triazinone-type inhibitor, trifludimoxazin, to inhibit PPO2 enzymes carrying target site mutations in comparison with three widely used PPO-inhibiting herbicides. RESULTS Mutated Amaranthus spp. PPO2 enzymes were expressed in Escherichia coli, purified and measured biochemically for activity and inhibition kinetics, and used for complementation experiments in an E. coli hemG mutant that lacks the corresponding microbial PPO gene function. In addition, we used ectopic expression in Arabidopsis and structural PPO protein modeling to support the enzyme inhibition study. The generated data strongly suggest that trifludimoxazin is a strong inhibitor both at the enzyme level and in transgenics Arabidopsis ectopically expressing PPO2 target site mutations. CONCLUSION Trifludimoxazin is a potent PPO-inhibiting herbicide that inhibits various PPO2 enzymes carrying target site mutations and could be used as a chemical-based control strategy to mitigate the widespread occurrence of PPO target site resistance as well as weeds that have evolved resistance to other herbicide mode of actions. © 2022 BASF SE and The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
| | | | - Kathryn Seebruck
- Department of Crop SciencesUniversity of Illinois at Urbana‐Champaign College of Agricultural, Consumer and Environmental SciencesUrbanaIllinoisUSA
| | | | | | | | | | - Rex Liebl
- BASF CorporationResearch Triangle ParkNorth CarolinaUSA
| | - Patrick J. Tranel
- Department of Crop SciencesUniversity of Illinois at Urbana‐Champaign College of Agricultural, Consumer and Environmental SciencesUrbanaIllinoisUSA
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13
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Advancement of Phenoxypyridine as an Active Scaffold for Pesticides. Molecules 2022; 27:molecules27206803. [PMID: 36296394 PMCID: PMC9610772 DOI: 10.3390/molecules27206803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/06/2022] [Accepted: 10/08/2022] [Indexed: 11/16/2022] Open
Abstract
Phenoxypyridine, the bioisostere of diaryl ethers, has been widely introduced into bioactive molecules as an active scaffold, which has different properties from diaryl ethers. In this paper, the bioactivities, structure-activity relationships, and mechanism of compounds containing phenoxypyridine were summarized, which may help to explore the lead compounds and discover novel pesticides with potential bioactivities.
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14
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Field-Evolved ΔG210-ppo2 from Palmer Amaranth Confers Pre-emergence Tolerance to PPO-Inhibitors in Rice and Arabidopsis. Genes (Basel) 2022; 13:genes13061044. [PMID: 35741806 PMCID: PMC9222656 DOI: 10.3390/genes13061044] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 05/03/2022] [Accepted: 06/07/2022] [Indexed: 02/02/2023] Open
Abstract
Resistance to protoporphyrinogen IX oxidase (PPO)-inhibitors in Amaranthus palmeri and Amaranthus tuberculatus is mainly contributed by mutations in the PPO enzyme, which renders herbicide molecules ineffective. The deletion of glycine210 (ΔG210) is the most predominant PPO mutation. ΔG210-ppo2 is overexpressed in rice (Oryza sativa c. ‘Nipponbare’) and Arabidopsis thaliana (Col-0). A foliar assay was conducted on transgenic T1 rice plants with 2× dose of fomesafen (780 g ha−1), showing less injury than the non-transgenic (WT) plants. A soil-based assay conducted with T2 rice seeds confirmed tolerance to fomesafen applied pre-emergence. In agar medium, root growth of WT rice seedlings was inhibited >90% at 5 µM fomesafen, while root growth of T2 seedlings was inhibited by 50% at 45 µM fomesafen. The presence and expression of the transgene were confirmed in the T2 rice survivors of soil-applied fomesafen. A soil-based assay was also conducted with transgenic A. thaliana expressing ΔG210-ppo2 which confirmed tolerance to the pre-emergence application of fomesafen and saflufenacil. The expression of A. palmeri ΔG210-ppo2 successfully conferred tolerance to soil-applied fomesafen in rice and Arabidopsis. This mutant also confers cross-tolerance to saflufenacil in Arabidopsis. This trait could be introduced into high-value crops that lack chemical options for weed management.
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15
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Design, synthesis, herbicidal activity, and the molecular docking study of novel diphenyl ether derivatives as protoporphyrinogen IX oxidase inhibitors. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Zhao LX, Peng JF, Liu FY, Zou YL, Gao S, Fu Y, Ye F. Design, Synthesis, and Herbicidal Activity of Diphenyl Ether Derivatives Containing a Five-Membered Heterocycle. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1003-1018. [PMID: 35040327 DOI: 10.1021/acs.jafc.1c05210] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Protoporphyrinogen oxidase (PPO, EC 1.3.3.4) is an important target for discovering novel herbicides, and it causes bleaching symptoms by inhibiting the synthesis of chlorophyll and heme. In this study, the active fragments of several commercial herbicides were joined by substructure splicing and bioisosterism, and a series of novel diphenyl ether derivatives containing five-membered heterocycles were synthesized. The greenhouse herbicidal activity and the PPO inhibitory activity in vitro were discussed in detail. The results showed that most compounds had good PPO inhibitory activity, and target compounds containing trifluoromethyl groups tended to have higher activity. Among them, compound G4 showed the best inhibitory activity, with a half-maximal inhibitory concentration (IC50) of 0.0468 μmol/L, which was approximately 3 times better than that of oxyfluorfen (IC50 = 0.150 μmol/L). In addition, molecular docking indicated that compound G4 formed obvious π-π stacking interactions and hydrogen bond interactions with PHE-392 and ARG-98, respectively. Remarkably, compound G4 had good safety for corn, wheat, rice, and soybean, and the cumulative concentration in crops was lower than that of oxyfluorfen. Therefore, compound G4 can be used to develop potential lead compounds for novel PPO inhibitors.
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Affiliation(s)
- Li-Xia Zhao
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Jian-Feng Peng
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Feng-Yi Liu
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Yue-Li Zou
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Shuang Gao
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Ying Fu
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
| | - Fei Ye
- Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China
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17
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Kreiner JM, Sandler G, Stern AJ, Tranel PJ, Weigel D, Stinchcombe J, Wright SI. Repeated origins, widespread gene flow, and allelic interactions of target-site herbicide resistance mutations. eLife 2022; 11:70242. [PMID: 35037853 PMCID: PMC8798060 DOI: 10.7554/elife.70242] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 01/16/2022] [Indexed: 11/13/2022] Open
Abstract
Causal mutations and their frequency in agricultural fields are well-characterized for herbicide resistance. However, we still lack understanding of their evolutionary history: the extent of parallelism in the origins of target-site resistance (TSR), how long these mutations persist, how quickly they spread, and allelic interactions that mediate their selective advantage. We addressed these questions with genomic data from 19 agricultural populations of common waterhemp (Amaranthus tuberculatus), which we show to have undergone a massive expansion over the past century, with a contemporary effective population size estimate of 8 x 107. We found variation at seven characterized TSR loci, two of which had multiple amino acid substitutions, and three of which were common. These three common resistance variants show extreme parallelism in their mutational origins, with gene flow having shaped their distribution across the landscape. Allele age estimates supported a strong role of adaptation from de novo mutations, with a median age of 30 suggesting that most resistance alleles arose soon after the onset of herbicide use. However, resistant lineages varied in both their age and evidence for selection over two different timescales, implying considerable heterogeneity in the forces that govern their persistence. Two such forces are intra- and inter-locus allelic interactions; we report a signal of extended haplotype competition between two common TSR alleles, and extreme linkage with genome-wide alleles with known functions in resistance adaptation. Together, this work reveals a remarkable example of spatial parallel evolution in a metapopulation, with important implications for the management of herbicide resistance.
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Affiliation(s)
- Julia M Kreiner
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Canada
| | - George Sandler
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Canada
| | - Aaron J Stern
- Graduate Group in Computational Biology, University of California, Berkeley, Berkeley, United States
| | - Patrick J Tranel
- Department of Crop Sciences, University of Illinois Urbana-Champaign, Urbana, United States
| | - Detlef Weigel
- Department of Molecular Biology, Max Planck Institute for Developmental Biology, Tübingen, Germany
| | - John Stinchcombe
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Canada
| | - Stephen Isaac Wright
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Canada
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Li X, Du J, Song B, Zhang X, Riaz M. Fomesafen drift affects morphophysiology of sugar beet. CHEMOSPHERE 2022; 287:132073. [PMID: 34478964 DOI: 10.1016/j.chemosphere.2021.132073] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 07/24/2021] [Accepted: 08/27/2021] [Indexed: 06/13/2023]
Abstract
Fomesafen is an herbicide used in soybean production, and sugar beet is a sensitive crop to fomesafen. When the herbicide is sprayed in the field, it is easy to cause floating and depositing on non-target crops, resulting in crop poisoning and reducing yield. There are few on the phenomenon and mechanism of fomesafen herbicide drift on sugar beet. There are few reports on the phenomenon and mechanism of ether herbicide migration on phytotoxicity of sugar beet. Therefore, in this experiment, indoor potted plants were used to simulate the dose of fomesafen drift deposited on sugar beet in the field to study the effects of fomesafen on the growth, photosynthetic system, and physiological indexes of seedlings for sugar beet were studied. The results showed that fomesafen at the dose of 225 g a.i. ha-1 significantly inhibited the plant height, root length, and biomass of sugar beet. Compared with the control, the net photosynthetic rate, stoma conductance, transpiration rate, and total chlorophyll pigment content of leaves were reduced by 77.16%, 83.84%, 64.00%, and 28.13%, respectively. Treatment with a dose of 225 g a.i. ha-1 also damaged the photosynthetic system II of the leaves, lowering the performance index on absorption energy, maximum quantum yield and, the energy of electron transfer, causing photoinhibition and photodamage. In addition, fomesafen significantly increased the content of malondialdehyde and the activity of peroxidase in leaves of sugar beet, reducing the activities of superoxide dismutase and catalase. Overall, this study is helpful to understand the drift and deposition of fomesafen on sugar beet and to discuss the phytotoxicity risk and dose of fomesafen on the beet, as a result of controlling the dose of fomesafen sprayed in the field.
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Affiliation(s)
- Xingfan Li
- National Sugar Crops Improvement Center, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin, 150080, China.
| | - Jiyu Du
- National Sugar Crops Improvement Center, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin, 150080, China; Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, Heilongjiang University, Harbin, 150080, China.
| | - Baiquan Song
- National Sugar Crops Improvement Center, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin, 150080, China; Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, Heilongjiang University, Harbin, 150080, China.
| | - Xi Zhang
- National Sugar Crops Improvement Center, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin, 150080, China.
| | - Muhammad Riaz
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Root Biology Center, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China.
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Gaines TA, Busi R, Küpper A. Can new herbicide discovery allow weed management to outpace resistance evolution? PEST MANAGEMENT SCIENCE 2021; 77:3036-3041. [PMID: 33942963 DOI: 10.1002/ps.6457] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/29/2021] [Accepted: 05/04/2021] [Indexed: 05/26/2023]
Abstract
While herbicides are the most effective and widely adopted weed management approach, the evolution of multiple herbicide resistance in damaging weed species threatens the yield and profitability of many crops. Weeds accumulate multiple resistance mechanisms through sequential selection and/or gene flow, with long-range and international transport of herbicide-resistant weeds proving to be a serious issue. Metabolic resistance mechanisms can confer resistance across multiple sites of action and even to herbicides not yet discovered. When a new site of action herbicide is introduced to control a key driver weed, it likely will be one of very few effective available herbicide options for that weed in a specific crop due to the continuous use of herbicides over the years and the resulting accumulation of resistance mechanisms, placing it at even higher risk to be rapidly lost to resistance due to the high selection pressure it will experience. The number of available, effective herbicides for certain driver weeds is decreasing over time because the rate of resistance evolution is faster than the rate of new herbicide discovery. Effective monitoring for species movement and diagnostics for resistance should be deployed to rapidly identify emerging resistance to any new site of action. While innovation in herbicide discovery is urgently needed to combat the pressing issue of resistance in weeds, the rate of selection for herbicide resistance in weeds must be slowed through changes in the patterns of how herbicides are used. © 2021 Society of Chemical Industry. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Todd A Gaines
- Department of Agricultural Biology, Colorado State University, Fort Collins, CO, USA
| | - Roberto Busi
- Australian Herbicide Resistance Initiative, School of Agriculture and Environment, University of Western Australia, Perth, WA, Australia
| | - Anita Küpper
- Bayer AG, Industriepark Höchst, Frankfurt am Main, Germany
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20
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Kohrt JR, Pawlak J, Sandell L, Cranmer J. Valent USA LLC strategies, innovations, and collaborations to deal with herbicide resistance and achieve sustainability. PEST MANAGEMENT SCIENCE 2021; 77:1578-1580. [PMID: 33421298 DOI: 10.1002/ps.6253] [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: 06/16/2020] [Revised: 12/17/2020] [Accepted: 01/09/2021] [Indexed: 06/12/2023]
Abstract
In conjunction with our parent company Sumitomo Chemical, Valent USA LLC continues to research, develop, and steward products that assist growers in the management of existing and emerging weed resistance issues in their fields. The knowledge gained through collaboration with universities and industry stakeholders in how to effectively manage and prevent the spread of herbicide-resistant weeds is being incorporated into the development and stewardship of our products. Valent demonstrates our commitment to herbicide stewardship by developing products which incorporate multiple-effective modes of action using flumioxazin as a foundational component for preemergence residual weed control. © 2021 Society of Chemical Industry.
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Trezzi MM, Alcántara-de la Cruz R, Rojano-Delgado AM, Alcántara E, Pagnoncelli FDB, Viecelli M, Diesel F, Pacheco V, De Prado R. Influence of temperature on the retention, absorption and translocation of fomesafen and imazamox in Euphorbia heterophylla. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 173:104794. [PMID: 33771265 DOI: 10.1016/j.pestbp.2021.104794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 01/06/2021] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
Climate change will be an additional issue to the challenge to manage herbicide resistant weeds. This work investigated the impact of three temperature regimes (10/5, 20/15 and 30/25 °C) on the efficacy, foliar retention, absorption and translocation of fomesafen, protoporphyrinogen oxidase (PPO) inhibitor, and imazamox, acetolactate synthase (ALS) inhibitor, between two Euphorbia heterophylla populations, one susceptible (S) and one multiple PPO and ALS resistant (R). The R population went from 5 (fomesafen) and 12 (imazamox) times more resistant than the S population at 10/5 °C to more than 100 times to both herbicides at 20/15 and 30/25 °C. Leaf retention of fomesafen was not affected by temperature; however, imazamox retention was less at 10/5 and 20/15 °C than at 30/25 °C, and the R population always retained less imazamox than the S population. 14C-fomesafen absorption was similar between populations, but lower amounts were absorbed at 10/5 °C regardless of the evaluation time. Recovered 14C-imazamox rates decreased in both populations as the evaluation time increased, ranging from 82 to 92% at 6 h after treatment (HAT), and from 47 to 76% at 48 HAT, depending on the temperature regime. The 14C-imazamox losses were greater from 24 HAT in R plants grown at 30/25 °C and in all temperature regimes at 48 HAT. Although both populations translocated large amounts of imazamox, the S population distributed it in the rest of the plant (33%) and roots (15%), while the R population kept it mainly on the treated leaf (24%) or lost ~20% more herbicide than S population at 48 HAT, indicating the need for further studies on root exudation between these populations. Low temperatures reduced resistance levels to fomesafen and imazamox in E. heterophylla, suggesting that temperature influences the expression of the mechanisms that govern this multiple resistance.
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Affiliation(s)
| | | | - Antonia M Rojano-Delgado
- Department of Agricultural Chemistry and Edaphology, University of Córdoba, 14071 Córdoba, Spain
| | | | | | - Matheus Viecelli
- Department of Agronomy, Federal University of Technology - Paraná, Pato Branco, Paraná, Brazil
| | - Francielli Diesel
- Department of Agronomy, Federal University of Technology - Paraná, Pato Branco, Paraná, Brazil
| | - Vacilania Pacheco
- Department of Agronomy, Federal University of Technology - Paraná, Pato Branco, Paraná, Brazil
| | - Rafael De Prado
- Department of Agricultural Chemistry and Edaphology, University of Córdoba, 14071 Córdoba, Spain
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Noguera MM, Rangani G, Heiser J, Bararpour T, Steckel LE, Betz M, Porri A, Lerchl J, Zimmermann S, Nichols RL, Roma-Burgos N. Functional PPO2 mutations: co-occurrence in one plant or the same ppo2 allele of herbicide-resistant Amaranthus palmeri in the US mid-south. PEST MANAGEMENT SCIENCE 2021; 77:1001-1012. [PMID: 32990410 DOI: 10.1002/ps.6111] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 09/22/2020] [Accepted: 09/29/2020] [Indexed: 05/27/2023]
Abstract
BACKGROUND Protoporphyrinogen IX oxidase 2 (PPO2) inhibitors are important for the management of glyphosate- and acetolactate synthase-resistant Palmer amaranth [Amaranthus palmeri (S.) Wats.]. The evolving resistance to PPO inhibitors is of great concern. We surveyed the evolution of resistance to fomesafen in the US Mid-south and determined its correlation with the known functional PPO2 target-site mutations (TSM). RESULTS The 167 accessions analyzed were grouped into five categories, four resistant (147) and one susceptible (20). Arkansas accessions constituted 100% of the susceptible group while the Missouri accessions comprised 60% of the most resistant category. The majority of Mississippi accessions (88%) clustered in the high-survival-high-injury category, manifesting an early-stage resistance evolution. One hundred and fifteen accessions were genotyped for four known TSMs; 74% of accessions carried at least one TSM. The most common single TSM was ΔG210 (18% of accessions) and the predominant double mutation was ΔG210 + G399A (17%). Other mutations are likely less favorable, hence are rare. All TSMs were detected in three accessions. Further examination revealed that 9 and two individuals carried G399A + G210 and G399A + R128G TSM in the same allele, respectively. The existence of these combinations is supported by molecular modeling. CONCLUSIONS Resistance to PPO inhibitors is widespread across the Mid-southern USA. Highly resistant field populations have plants with multiple mutations. G399A is the most prone to co-occur with other ppo2 mutations in the same allele. Mutation at R128 in the configuration of the PPO2 catalytic domain restrains the co-occurrence of R128G with ΔG210, making ΔG210 + G399A the most plausible, tolerable functional mutation combination to co-occur in the same ppo2 allele.
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Affiliation(s)
- Matheus M Noguera
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AK, USA
| | - Gulab Rangani
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AK, USA
| | - James Heiser
- Food & Natural Resources, Fisher Delta Research Center, University of Missouri College of Agriculture, Portageville, MO, USA
| | - Taghi Bararpour
- Delta Research and Extension Center, Mississippi State University, Stoneville, MS, USA
| | | | | | | | | | | | | | - Nilda Roma-Burgos
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AK, USA
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23
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Lee WH, Kwon YB, Lee KH, Choi J, Seu Y. Synthesis of Cyclopropyl Ester and Amide Substituted Pyrimidinediones as Protoporphyrinogen Oxidase‐Inhibiting Herbicides. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Won Hyung Lee
- Central Research Institute, Kyung Nong Co. Ltd. Gyeongju 38175 Gyeongsangbuk‐do Republic of Korea
- School of Life Sciences and Biotechnology Kyungpook National University Daegu 41566 Republic of Korea
| | - Young Bin Kwon
- Central Research Institute, Kyung Nong Co. Ltd. Gyeongju 38175 Gyeongsangbuk‐do Republic of Korea
| | - Kye Hwan Lee
- Central Research Institute, Kyung Nong Co. Ltd. Gyeongju 38175 Gyeongsangbuk‐do Republic of Korea
| | - Jong‐Soo Choi
- School of Life Sciences and Biotechnology Kyungpook National University Daegu 41566 Republic of Korea
| | - Young‐Bae Seu
- School of Life Sciences and Biotechnology Kyungpook National University Daegu 41566 Republic of Korea
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24
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Tranel PJ. Herbicide resistance in Amaranthus tuberculatus †. PEST MANAGEMENT SCIENCE 2021; 77:43-54. [PMID: 32815250 DOI: 10.1002/ps.6048] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/10/2020] [Accepted: 08/19/2020] [Indexed: 05/23/2023]
Abstract
Amaranthus tuberculatus is the major weed species in many midwestern US row-crop production fields, and it is among the most problematic weeds in the world in terms of its ability to evolve herbicide resistance. It has now evolved resistance to herbicides spanning seven unique sites of action, with populations and even individual plants often possessing resistance to several herbicides/herbicide groups. Historically, herbicide target-site changes accounted for most of the known resistance mechanisms in this weed; however, over the last few years, non-target-site mechanisms, particularly enhanced herbicide detoxification, have become extremely common in A. tuberculatus. Unravelling the genetics and molecular details of non-target-site resistance mechanisms, understanding the extent to which they confer cross resistance to other herbicides, and understanding how they evolve remain as critical research endeavors. Transcriptomic and genomics approaches are already facilitating such studies, the results of which hopefully will inform better resistance-mitigation strategies. The largely unprecedented level of herbicide resistance in A. tuberculatus is not only a fascinating example of evolution in action, but it is a serious and growing threat to the sustainability of midwestern US cropping systems. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Patrick J Tranel
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
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25
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Baek Y, Bobadilla LK, Giacomini DA, Montgomery JS, Murphy BP, Tranel PJ. Evolution of Glyphosate-Resistant Weeds. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 255:93-128. [PMID: 33932185 DOI: 10.1007/398_2020_55] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Widespread adoption of glyphosate-resistant crops and concomitant reliance on glyphosate for weed control set an unprecedented stage for the evolution of herbicide-resistant weeds. There are now 48 weed species that have evolved glyphosate resistance. Diverse glyphosate-resistance mechanisms have evolved, including single, double, and triple amino acid substitutions in the target-site gene, duplication of the gene encoding the target site, and others that are rare or nonexistent for evolved resistance to other herbicides. This review summarizes these resistance mechanisms, discusses what is known about their evolution, and concludes with some of the impacts glyphosate-resistant weeds have had on weed management.
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Affiliation(s)
- Yousoon Baek
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | - Lucas K Bobadilla
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | - Darci A Giacomini
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | | | - Brent P Murphy
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | - Patrick J Tranel
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA.
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Conformation of the Intermediates in the Reaction Catalyzed by Protoporphyrinogen Oxidase: An In Silico Analysis. Int J Mol Sci 2020; 21:ijms21249495. [PMID: 33327448 PMCID: PMC7764921 DOI: 10.3390/ijms21249495] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/09/2020] [Accepted: 12/10/2020] [Indexed: 12/29/2022] Open
Abstract
Protoporphyrinogen oxidase (PPO) is a critical enzyme across life as the last common step in the synthesis of many metalloporphyrins. The reaction mechanism of PPO was assessed in silico and the unstructured loop near the binding pocket was investigated. The substrate, intermediates, and product were docked in the catalytic domain of PPO using a modified Autodock method, introducing flexibility in the macrocycles. Sixteen PPO protein sequences across phyla were aligned and analyzed with Phyre2 and ProteinPredict to study the unstructured loop from residue 204–210 in the H. sapiens structure. Docking of the substrate, intermediates, and product all resulted in negative binding energies, though the substrate had a lower energy than the others by 40%. The α-H of C10 was found to be 1.4 angstroms closer to FAD than the β-H, explaining previous reports of the reaction occurring on the meso face of the substrate. A lack of homology in sequence or length in the unstructured loop indicates a lack of function for the protein reaction. This docking study supports a reaction mechanism proposed previously whereby all hydride abstractions occur on the C10 of the tetrapyrrole followed by tautomeric rearrangement to prepare the intermediate for the next reaction.
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27
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Resistance to Fomesafen, Imazamox and Glyphosate in Euphorbia heterophylla from Brazil. AGRONOMY-BASEL 2020. [DOI: 10.3390/agronomy10101573] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Euphorbia heterophylla is a species of weed that was previously controlled by fomesafen, imazamox and glyphosate, but continued use of these herbicides has selected resistant populations from the Rio Grande do Sul (Brazil). One resistant (R) strain and one susceptible (S) strain to fomesafen, imazamox and glyphosate were compared, the latter by recurrent selection. Dose-response tests showed multiple resistance to these herbicides. The required imazamox concentration to inhibit ALS by 50% was approximately 16 times greater in the R population than in the S population. Based on the EPSPS activity results, the R population was 10 fold less sensitive to glyphosate than the S counterpart. In addition, basal EPSPS activity from R plants was 3.3 fold higher than the level detected on S plants. The Proto IX assays showed high resistance to fomesafen in the R population that accumulated less Proto IX than the S population. Malathion assays showed the participation of CytP450 in fomesafen resistance, but a molecular mechanism could also be involved. To our knowledge, this is the first characterisation of multiple resistance to these three groups of herbicides in E. heterophylla in the world.
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28
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Adhikari P, Goodrich E, Fernandes SB, Lipka AE, Tranel P, Brown P, Jamann TM. Genetic variation associated with PPO-inhibiting herbicide tolerance in sorghum. PLoS One 2020; 15:e0233254. [PMID: 33052910 PMCID: PMC7556536 DOI: 10.1371/journal.pone.0233254] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 08/26/2020] [Indexed: 11/29/2022] Open
Abstract
Herbicide application is crucial for weed management in most crop production systems, but for sorghum herbicide options are limited. Sorghum is sensitive to residual protoporphyrinogen oxidase (PPO)-inhibiting herbicides, such as fomesafen, and a long re-entry period is required before sorghum can be planted after its application. Improving sorghum for tolerance to such residual herbicides would allow for increased sorghum production and the expansion of herbicide options for growers. In this study, we observed sorghum tolerance to residual fomesafen. To investigate the underlying tolerance mechanism a genome-wide association mapping study was conducted using field-collected sorghum biomass panel (SBP) data, and a greenhouse assay was developed to confirm the field phenotypes. A total of 26 significant SNPs (FDR<0.05), spanning a 215.3 kb region on chromosome 3, were detected. The ten most significant SNPs included two in genic regions (Sobic.003G136800, and Sobic.003G136900) and eight SNPs in the intergenic region encompassing the genes Sobic.003G136700, Sobic.003G136800, Sobic.003G137000, Sobic.003G136900, and Sobic.003G137100. The gene Sobic.003G137100 (PPXI), which encodes the PPO1 enzyme, one of the targets of PPO-inhibiting herbicides, was located 12kb downstream of the significant SNP S03_13152838. We found that PPXI is highly conserved in sorghum and expression does not significantly differ between tolerant and sensitive sorghum lines. Our results suggest that PPXI most likely does not underlie the observed herbicide tolerance. Instead, the mechanism underlying herbicide tolerance in the SBP is likely metabolism-based resistance, possibly regulated by the action of multiple genes. Further research is necessary to confirm candidate genes and their functions.
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Affiliation(s)
- Pragya Adhikari
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Emma Goodrich
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Samuel B. Fernandes
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Alexander E. Lipka
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Patrick Tranel
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Patrick Brown
- Department of Plant Sciences, University of California Davis, Davis, CA, United States of America
| | - Tiffany M. Jamann
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- * E-mail:
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29
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Gaines TA, Duke SO, Morran S, Rigon CAG, Tranel PJ, Küpper A, Dayan FE. Mechanisms of evolved herbicide resistance. J Biol Chem 2020; 295:10307-10330. [PMID: 32430396 PMCID: PMC7383398 DOI: 10.1074/jbc.rev120.013572] [Citation(s) in RCA: 193] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/18/2020] [Indexed: 12/13/2022] Open
Abstract
The widely successful use of synthetic herbicides over the past 70 years has imposed strong and widespread selection pressure, leading to the evolution of herbicide resistance in hundreds of weed species. Both target-site resistance (TSR) and nontarget-site resistance (NTSR) mechanisms have evolved to most herbicide classes. TSR often involves mutations in genes encoding the protein targets of herbicides, affecting the binding of the herbicide either at or near catalytic domains or in regions affecting access to them. Most of these mutations are nonsynonymous SNPs, but polymorphisms in more than one codon or entire codon deletions have also evolved. Some herbicides bind multiple proteins, making the evolution of TSR mechanisms more difficult. Increased amounts of protein target, by increased gene expression or by gene duplication, are an important, albeit less common, TSR mechanism. NTSR mechanisms include reduced absorption or translocation and increased sequestration or metabolic degradation. The mechanisms that can contribute to NTSR are complex and often involve genes that are members of large gene families. For example, enzymes involved in herbicide metabolism-based resistances include cytochromes P450, GSH S-transferases, glucosyl and other transferases, aryl acylamidase, and others. Both TSR and NTSR mechanisms can combine at the individual level to produce higher resistance levels. The vast array of herbicide-resistance mechanisms for generalist (NTSR) and specialist (TSR and some NTSR) adaptations that have evolved over a few decades illustrate the evolutionary resilience of weed populations to extreme selection pressures. These evolutionary processes drive herbicide and herbicide-resistant crop development and resistance management strategies.
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Affiliation(s)
- Todd A Gaines
- Agricultural Biology Department, Colorado State University, Fort Collins, Colorado, USA
| | - Stephen O Duke
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Oxford, Mississippi, USA
| | - Sarah Morran
- Agricultural Biology Department, Colorado State University, Fort Collins, Colorado, USA
| | - Carlos A G Rigon
- Agricultural Biology Department, Colorado State University, Fort Collins, Colorado, USA
| | - Patrick J Tranel
- Department of Crop Sciences, University of Illinois, Urbana, Illinois, USA
| | - Anita Küpper
- Bayer AG, CropScience Division, Frankfurt am Main, Germany
| | - Franck E Dayan
- Agricultural Biology Department, Colorado State University, Fort Collins, Colorado, USA
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30
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Bi B, Wang Q, Coleman JJ, Porri A, Peppers JM, Patel JD, Betz M, Lerchl J, McElroy JS. A novel mutation A212T in chloroplast Protoporphyrinogen oxidase (PPO1) confers resistance to PPO inhibitor Oxadiazon in Eleusine indica. PEST MANAGEMENT SCIENCE 2020; 76:1786-1794. [PMID: 31788953 DOI: 10.1002/ps.5703] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 11/26/2019] [Accepted: 11/26/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Protoporphyrinogen oxidase (PPO) with two isoforms, chloroplast-targeted (PPO1) and mitochondrial-targeted (PPO2), catalyzes a step in the biosynthesis of chlorophyll and heme. PPO1 and PPO2 are herbicide target sites of PPO-inhibiting herbicides. Target-site mutations conferring resistance to PPO inhibitors have all thus far been in PPO2. Oxadiazon is a unique PPO inhibitor utilized for preemergence Eleusine indica control. In this research, we evaluated the response of two previously confirmed oxadiazon-resistant and susceptible E. indica biotypes to other PPO inhibitors and identified the resistance mechanism in two oxadiazon-resistant E. indica biotypes. RESULTS Two E. indica biotypes were resistant to oxadiazon, but not to other structurally unrelated PPO inhibitors, such as lactofen, flumioxazin and sulfentrazone. A novel mutation A212T was identified in the chloroplast-targeted PPO1, conferring resistance to oxadiazon in a heterologous expression system. Computational structural modeling provided a mechanistic explanation for reduced herbicide binding to the variant protein: the presence of a methyl group of threonine 212 changes the PPO1 active site and produces repulsive electrostatic interactions that repel oxadiazon from the binding pocket. CONCLUSION The novel A212T mutation in PPO1 conferring resistance specifically to PPO inhibitor oxadiazon was characterized. This is the first evidence of the direct role of PPO1 in the PPO mode of action, and the first evidence of evolved resistance in PPO1. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Bo Bi
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, AL, USA
| | - Qiang Wang
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA
| | - Jeffrey J Coleman
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA
| | | | - John M Peppers
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, AL, USA
| | - Jinesh D Patel
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, AL, USA
| | | | | | - J Scott McElroy
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, AL, USA
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31
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Zhao LX, Jiang MJ, Hu JJ, Zou YL, Cheng Y, Ren T, Gao S, Fu Y, Ye F. Design, Synthesis, and Herbicidal Activity of Novel Diphenyl Ether Derivatives Containing Fast Degrading Tetrahydrophthalimide. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:3729-3741. [PMID: 32125836 DOI: 10.1021/acs.jafc.0c00947] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
To seek new protoporphyrinogen oxidase (PPO) inhibitors with better biological activity, a series of novel diphenyl ether derivatives containing tetrahydrophthalimide were designed based on the principle of substructure splicing and bioisomerization. PPO inhibition experiments exhibited that 6c is the most potential compound, with the half-maximal inhibitory concentration (IC50) value of 0.00667 mg/L, showing 7 times higher activity than Oxyfluorfen (IC50 = 0.0426 mg/L) against maize PPO and similar herbicidal activities to Oxyfluorfen in weeding experiments in greenhouses and field weeding experiments. In view of the inspected bioactivities, the structure-activity relationship (SAR) of this series of compounds was also discussed. Crop selection experiments demonstrate that compound 6c is safe for soybeans, maize, rice, peanuts, and cotton at a dose of 300 g ai/ha. Accumulation analysis experiments showed that the accumulation of 6c in some crops (soybeans, peanuts, and cotton) was significantly lower than Oxyfluorfen. Current work suggests that compound 6c may be developed as a new herbicide candidate in fields.
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Affiliation(s)
- Li-Xia Zhao
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
| | - Mao-Jun Jiang
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
| | - Jia-Jun Hu
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
| | - Yue-Li Zou
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
| | - Yuan Cheng
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
| | - Tao Ren
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
| | - Shuang Gao
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
| | - Ying Fu
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
| | - Fei Ye
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
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Gao W, Li X, Ren D, Sun S, Huo J, Wang Y, Chen L, Zhang J. Design and Synthesis of N-phenyl Phthalimides as Potent Protoporphyrinogen Oxidase Inhibitors. Molecules 2019; 24:molecules24234363. [PMID: 31795340 PMCID: PMC6930678 DOI: 10.3390/molecules24234363] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 11/26/2019] [Accepted: 11/27/2019] [Indexed: 11/16/2022] Open
Abstract
Protoporphyrinogen oxidase (PPO) has been identified as one of the most promising targets for herbicide discovery. A series of novel phthalimide derivatives were designed by molecular docking studies targeting the crystal structure of mitochondrial PPO from tobacco (mtPPO, PDB: 1SEZ) by using Flumioxazin as a lead, after which the derivatives were synthesized and characterized, and their herbicidal activities were subsequently evaluated. The herbicidal bioassay results showed that compounds such as 3a (2-(4-bromo-2,6-difluorophenyl) isoindoline-1,3-dione), 3d (methyl 2-(4-chloro-1,3-dioxoisoindolin-2-yl)-5-fluorobenzoate), 3g (4-chloro-2-(5-methylisoxazol-3-yl) isoindoline-1,3-dione), 3j (4-chloro-2-(thiophen-2-ylmethyl) isoindoline-1,3-dione) and 3r (2-(4-bromo-2,6-difluorophenyl)-4-fluoroisoindoline-1,3-dione) had good herbicidal activities; among them, 3a showed excellent herbicidal efficacy against A. retroflexus and B. campestris via the small cup method and via pre-emergence and post-emergence spray treatments. The efficacy was comparable to that of the commercial herbicides Flumioxazin, Atrazine, and Chlortoluron. Further, the enzyme activity assay results suggest that the mode of action of compound 3a involves the inhibition of the PPO enzyme, and 3a showed better inhibitory activity against PPO than did Flumioxazin. These results indicate that our molecular design strategy contributes to the development of novel promising PPO inhibitors.
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Murphy BP, Tranel PJ. Target-Site Mutations Conferring Herbicide Resistance. PLANTS 2019; 8:plants8100382. [PMID: 31569336 PMCID: PMC6843678 DOI: 10.3390/plants8100382] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 12/01/2022]
Abstract
Mutations conferring evolved herbicide resistance in weeds are known in nine different herbicide sites of action. This review summarizes recently reported resistance-conferring mutations for each of these nine target sites. One emerging trend is an increase in reports of multiple mutations, including multiple amino acid changes at the glyphosate target site, as well as mutations involving two nucleotide changes at a single amino acid codon. Standard reference sequences are suggested for target sites for which standards do not already exist. We also discuss experimental approaches for investigating cross-resistance patterns and for investigating fitness costs of specific target-site mutations.
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Affiliation(s)
- Brent P Murphy
- Department of Crop Sciences, University of Illinois, Urbana, IL 61801, USA.
| | - Patrick J Tranel
- Department of Crop Sciences, University of Illinois, Urbana, IL 61801, USA.
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Ambrosini V, Issawi M, Leroy-Lhez S, Riou C. How protoporphyrinogen IX oxidase inhibitors and transgenesis contribute to elucidate plant tetrapyrrole pathway. J PORPHYR PHTHALOCYA 2019. [DOI: 10.1142/s1088424619300076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Several families of herbicides, especially diphenyl ether (DPE) and pyrimidinedione, target the plant tetrapyrrole biosynthesis pathways and in particular one key enzyme, protoporphyrinogen IX oxidase (PPO). When plants are treated with DPE or pyrimidinedione, an accumulation of protoporphyrin IX, the first photosensitizer of this pathway, is observed in cytosol where it becomes very deleterious under light. Indeed these herbicides trigger plant death in two distinct ways: (i) inhibition of chlorophylls and heme syntheses and (ii) a huge accumulation of protoporphyrin IX in cytosol. Recently, a strategy based on plant transgenesis that induces deregulation of the tetrapyrrole pathway by up- or down-regulation of genes encoding enzymes, such as glutamyl-[Formula: see text]RNA reductase, porphobilinogen deaminase and PPO, has been developed. Against all expectations, only transgenic crops overexpressing PPO showed resistance to DPE and pyrimidinedione. This herbicide resistance of transgenic crops leads to the hypothesis that the overall consumption of herbicides will be reduced as previously reported for glyphosate-resistant transgenic crops. In this review, after a rapid presentation of plant tetrapyrrole biosynthesis, we show how only PPO enzyme can be the target of DPE and how transgenic crops can be further resistant not only to herbicide but also to abiotic stress such as drought or chilling. Keeping in mind that this approach is mostly prohibited in Europe, we attempt to discuss it to interest the scientific community, from plant physiologists to chemists, who work on the interface of photosensitizer optimization and agriculture.
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Affiliation(s)
- Veronica Ambrosini
- Laboratoire Peirene EA7500, Université de Limoges, Faculté des Sciences et Techniques, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France
| | - Mohammad Issawi
- Laboratoire Peirene EA7500, Université de Limoges, Faculté des Sciences et Techniques, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France
| | - Stéphanie Leroy-Lhez
- Laboratoire Peirene EA7500, Université de Limoges, Faculté des Sciences et Techniques, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France
| | - Catherine Riou
- Laboratoire Peirene EA7500, Université de Limoges, Faculté des Sciences et Techniques, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France
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Carfentrazone-ethyl resistance in an Amaranthus tuberculatus population is not mediated by amino acid alterations in the PPO2 protein. PLoS One 2019; 14:e0215431. [PMID: 30986256 PMCID: PMC6464220 DOI: 10.1371/journal.pone.0215431] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 04/02/2019] [Indexed: 11/25/2022] Open
Abstract
To date, the only known mechanism conferring protoporphyrinogen IX oxidase (PPO)-inhibitor resistance in waterhemp (Amaranthus tuberculatus) is a glycine deletion in PPO2 (ΔG210), which results in cross-resistance to foliar PPO-inhibiting herbicides. However, a metabolism-based, HPPD-inhibitor resistant waterhemp population from Illinois (named SIR) was suspected of having a non-target site resistance (NTSR) mechanism due to its resistance to carfentrazone-ethyl (CE) but sensitivity to diphenylethers (DPEs). In greenhouse experiments, SIR sustained less injury than two PPO inhibitor-sensitive populations (WCS and SEN) after applying a field-use rate of CE, and after initial rapid necrosis, regrowth of SIR plants was comparable to a known PPO inhibitor-resistant population (ACR) possessing the ΔG210 mutation. Dose-response analysis determined 50% growth reduction rates in CE-resistant (SIR and ACR) and sensitive (SEN) waterhemp populations, which showed SIR was 30-fold resistant compared to SEN and two-fold more resistant than ACR. Deduced amino acid sequences derived from SIR PPX2 partial cDNAs did not contain the ΔG210 mutation found in ACR or other target-site mutations that confer PPO-inhibitor resistance previously reported in Palmer amaranth (Amaranthus palmeri). Although several SIR cDNAs contained amino acid substitutions, none were uniform among samples. Additionally, SIR plants treated with malathion and CE showed a significant reduction in biomass accumulation compared to CE alone. These results indicate robust CE resistance in SIR is not mediated by amino acid changes in the PPO2 protein, but instead resistance may be conferred through a NTSR mechanism such as enhanced herbicide metabolism.
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Rangani G, Salas-Perez RA, Aponte RA, Knapp M, Craig IR, Mietzner T, Langaro AC, Noguera MM, Porri A, Roma-Burgos N. A Novel Single-Site Mutation in the Catalytic Domain of Protoporphyrinogen Oxidase IX (PPO) Confers Resistance to PPO-Inhibiting Herbicides. FRONTIERS IN PLANT SCIENCE 2019; 10:568. [PMID: 31156659 PMCID: PMC6530635 DOI: 10.3389/fpls.2019.00568] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 04/15/2019] [Indexed: 05/10/2023]
Abstract
Protoporphyrinogen oxidase (PPO)-inhibiting herbicides are used to control weeds in a variety of crops. These herbicides inhibit heme and photosynthesis in plants. PPO-inhibiting herbicides are used to control Amaranthus palmeri (Palmer amaranth) especially those with resistance to glyphosate and acetolactate synthase (ALS) inhibiting herbicides. While investigating the basis of high fomesafen-resistance in A. palmeri, we identified a new amino acid substitution of glycine to alanine in the catalytic domain of PPO2 at position 399 (G399A) (numbered according to the protein sequence of A. palmeri). G399 is highly conserved in the PPO protein family across eukaryotic species. Through combined molecular, computational, and biochemical approaches, we established that PPO2 with G399A mutation has reduced affinity for several PPO-inhibiting herbicides, possibly due to steric hindrance induced by the mutation. This is the first report of a PPO2 amino acid substitution at G399 position in a field-selected weed population of A. palmeri. The mutant A. palmeri PPO2 showed high-level in vitro resistance to different PPO inhibitors relative to the wild type. The G399A mutation is very likely to confer resistance to other weed species under selection imposed by the extensive agricultural use of PPO-inhibiting herbicides.
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Affiliation(s)
- Gulab Rangani
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, United States
| | - Reiofeli A. Salas-Perez
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, United States
| | | | | | | | | | - Ana Claudia Langaro
- Department of Crop Science, Universidade Federal Rural do Rio de Janeiro, Seropédica, Brazil
| | - Matheus M. Noguera
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, United States
| | | | - Nilda Roma-Burgos
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, United States
- *Correspondence: Nilda Roma-Burgos,
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Gaines TA, Shaner DL, Dayan FE. Introduction to Pest Management Science special issue for GHRC 2017. PEST MANAGEMENT SCIENCE 2018; 74:2209-2210. [PMID: 30203449 DOI: 10.1002/ps.5128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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