1
|
Villicaña C, Rubí-Rangel LM, Amarillas L, Lightbourn-Rojas LA, Carrillo-Fasio JA, León-Félix J. Isolation and Characterization of Two Novel Genera of Jumbo Bacteriophages Infecting Xanthomonas vesicatoria Isolated from Agricultural Regions in Mexico. Antibiotics (Basel) 2024; 13:651. [PMID: 39061333 PMCID: PMC11273794 DOI: 10.3390/antibiotics13070651] [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: 06/04/2024] [Revised: 06/27/2024] [Accepted: 07/06/2024] [Indexed: 07/28/2024] Open
Abstract
Bacterial spot is a serious disease caused by several species of Xanthomonas affecting pepper and tomato production worldwide. Since the strategies employed for disease management have been inefficient and pose a threat for environmental and human health, the development of alternative methods is gaining relevance. The aim of this study is to isolate and characterize lytic phages against Xanthomonas pathogens. Here, we isolate two jumbo phages, named XaC1 and XbC2, from water obtained from agricultural irrigation channels by the enrichment technique using X. vesicatoria as a host. We determined that both phages were specific for inducing the lysis of X. vesicatoria strains, but not of other xanthomonads. The XaC1 and XbC2 phages showed a myovirus morphology and were classified as jumbo phages due to their genomes being larger than 200 kb. Phylogenetic and comparative analysis suggests that XaC1 and XbC2 represent both different and novel genera of phages, where XaC1 possesses a low similarity to other phage genomes reported before. Finally, XaC1 and XbC2 exhibited thermal stability up to 45 °C and pH stability from 5 to 9. All these results indicate that the isolated phages are promising candidates for the development of formulations against bacterial spot, although further characterization is required.
Collapse
Affiliation(s)
- Claudia Villicaña
- CONAHCYT—Laboratorio de Biología Molecular y Genómica Funcional, Centro de Investigación en Alimentación y Desarrollo, A. C., Culiacán 80110, Sinaloa, Mexico;
| | - Lucía M. Rubí-Rangel
- Laboratorio de Biología Molecular y Genómica Funcional, Centro de Investigación en Alimentación y Desarrollo, A. C., Culiacán 80110, Sinaloa, Mexico;
| | - Luis Amarillas
- Laboratorio de Genética, Instituto de Investigación Lightbourn, A. C., Cd. Jimenez 33981, Chihuahua, Mexico; (L.A.)
| | | | - José Armando Carrillo-Fasio
- Laboratorio de Nematología Agrícola, Centro de Investigación en Alimentación y Desarrollo, A. C., Culiacán 80110, Sinaloa, Mexico;
| | - Josefina León-Félix
- Laboratorio de Biología Molecular y Genómica Funcional, Centro de Investigación en Alimentación y Desarrollo, A. C., Culiacán 80110, Sinaloa, Mexico;
| |
Collapse
|
2
|
Panth M, Noh E, Schnabel G, Wang H. Development of a Long-Amplicon Propidium Monoazide-Quantitative PCR Assay for Detection of Viable Xanthomonas arboricola pv. pruni Cells in Peach Trees. PLANT DISEASE 2024; 108:2190-2196. [PMID: 38537137 DOI: 10.1094/pdis-01-24-0012-re] [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: 06/25/2024]
Abstract
Bacterial spot is one of the most serious diseases of peach caused by the pathogen Xanthomonas arboricola pv. pruni (XAP), leading to early defoliation and unmarketable fruit. The pathogen can overwinter in peach twigs and form spring cankers, which are considered the primary inoculum source for early season leaf and fruitlet infection. The amount of overwintering bacterial inoculum plays a critical role for the bacterial spot development, but no reliable quantification method is available. Thus, we developed a long-amplicon propidium monoazide (PMA)-quantitative PCR (qPCR) assay for specific detection of viable XAP cells. The optimized PMA-qPCR assay used 20 μM of PMAxx for pure bacterial suspensions and 100 μM for peach twig tissues. The Qiagen Plant Pro Kit with an additional lysozyme digestion step was the DNA extraction protocol that yielded the best detection sensitivity with the bacteria-spiked peach twig extracts. The PMA-qPCR assay was tested with different mixtures of viable and heat-killed XAP cells in pure bacterial suspensions and bacteria-spiked peach twig tissues. The results showed that this assay enabled sensitive, specific, and accurate quantification of viable XAP cells as low as 103 CFU/ml with the presence of up to 107 CFU/ml of dead XAP cells, while suppressing the amplification of DNA from dead cells. For mixtures of viable and dead cells, the PMA-qPCR results were linearly correlated with the predicted concentrations of viable XAP (R2 > 0.98). Thus, the PMA-qPCR assay will be a suitable tool for quantifying overwintering XAP population on peach trees.
Collapse
Affiliation(s)
- Milan Panth
- Edisto Research and Education Center, Clemson University, Blackville, SC 29817
| | - Enoch Noh
- Edisto Research and Education Center, Clemson University, Blackville, SC 29817
| | - Guido Schnabel
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC 29634
| | - Hehe Wang
- Edisto Research and Education Center, Clemson University, Blackville, SC 29817
| |
Collapse
|
3
|
Amábile-Cuevas CF, Lund-Zaina S. Non-Canonical Aspects of Antibiotics and Antibiotic Resistance. Antibiotics (Basel) 2024; 13:565. [PMID: 38927231 PMCID: PMC11200725 DOI: 10.3390/antibiotics13060565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/09/2024] [Accepted: 05/29/2024] [Indexed: 06/28/2024] Open
Abstract
The understanding of antibiotic resistance, one of the major health threats of our time, is mostly based on dated and incomplete notions, especially in clinical contexts. The "canonical" mechanisms of action and pharmacodynamics of antibiotics, as well as the methods used to assess their activity upon bacteria, have not changed in decades; the same applies to the definition, acquisition, selective pressures, and drivers of resistance. As a consequence, the strategies to improve antibiotic usage and overcome resistance have ultimately failed. This review gathers most of the "non-canonical" notions on antibiotics and resistance: from the alternative mechanisms of action of antibiotics and the limitations of susceptibility testing to the wide variety of selective pressures, lateral gene transfer mechanisms, ubiquity, and societal factors maintaining resistance. Only by having a "big picture" view of the problem can adequate strategies to harness resistance be devised. These strategies must be global, addressing the many aspects that drive the increasing prevalence of resistant bacteria aside from the clinical use of antibiotics.
Collapse
Affiliation(s)
| | - Sofia Lund-Zaina
- Department of Public Health, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
| |
Collapse
|
4
|
Akila AH, Ali MAS, Khairy AM, Elnahal ASM, Alfassam HE, Rudayni HA, Jaber FA, Tohamy MRA. Biological Control of Tomato Bacterial Leaf Spots and Its Impact on Some Antioxidant Enzymes, Phenolic Compounds, and Pigment Content. BIOLOGY 2024; 13:369. [PMID: 38927249 PMCID: PMC11201276 DOI: 10.3390/biology13060369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/17/2024] [Accepted: 05/18/2024] [Indexed: 06/28/2024]
Abstract
Tomato bacterial spots, caused by Xanthomonas campestris pv. vesicatoria (Xcv1) and X. euvesicatoria (Xe2), as well as bacterial specks, caused by two strains of Pseudomonas syringae pv. tomato (Pst1 and Pst2), represent significant threats to tomato production in the El-Sharkia governorate, often resulting in substantial yield losses. The objective of this study was to evaluate the efficacy of various biocontrol culture filtrates, including bacteria and fungi agents, in managing the occurrence and severity of these diseases, while also monitoring physiological changes in tomato leaves, including antioxidant enzymes, phenolics, and pigment content. The culture filtrates from examined Trichoderma species (T. viride, T. harzianum, and T. album), as well as the tested bacteria (Bacillus subtilis, Pseudomonas fluorescens, and Serratia marcescens) at concentrations of 25%, 50%, and 100%, significantly inhibited the proliferation of pathogenic bacteria In vitro. For the In vivo experiments, we used specific doses of 5 mL of spore suspension per plant for the fungal bioagents at a concentration of 2.5 × 107 spores/mL. The bacterial bioagents were applied as a 10 mL suspension per plant at a concentration of 1 × 108 CFU/mL. Spraying the culture filtrates of the tested bioagents two days before infection In vivo significantly reduced disease incidence and severity. Trichoderma viride exhibited the highest efficacy among the fungal bioagents, followed by T. harzianum and T. album. Meanwhile, the culture filtrate of B. subtilis emerged as the most potent among the bacterial bioagents, followed by P. fluorescens. Furthermore, applying these culture filtrates resulted in elevated levels of chitinase, peroxidase, and polyphenol oxidase activity. This effect extended to increased phenol contents, as well as chlorophyll a, chlorophyll b, and carotenoids in sprayed tomato plants compared to the control treatment. Overall, these findings underscore the potential of these biocontrol strategies to effectively mitigate disease incidence and severity while enhancing plant defense mechanisms and physiological parameters, thus offering promising avenues for sustainable disease management in tomato production.
Collapse
Affiliation(s)
- Asmaa H. Akila
- Plant Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt (M.A.S.A.)
| | - Mohamed A. S. Ali
- Plant Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt (M.A.S.A.)
| | - Ahmed M. Khairy
- Plant Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt (M.A.S.A.)
| | - Ahmed S. M. Elnahal
- Plant Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt (M.A.S.A.)
| | - Haifa E. Alfassam
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Hassan A. Rudayni
- Department of Biology, College of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh 11623, Saudi Arabia;
| | - Fatima A. Jaber
- Department of Biological Sciences, College of Science, University of Jeddah, Jeddah 21589, Saudi Arabia;
| | - Mohamed R. A. Tohamy
- Plant Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt (M.A.S.A.)
| |
Collapse
|
5
|
Batuman O, Britt-Ugartemendia K, Kunwar S, Yilmaz S, Fessler L, Redondo A, Chumachenko K, Chakravarty S, Wade T. The Use and Impact of Antibiotics in Plant Agriculture: A Review. PHYTOPATHOLOGY 2024; 114:885-909. [PMID: 38478738 DOI: 10.1094/phyto-10-23-0357-ia] [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: 05/22/2024]
Abstract
Growers have depended on the specificity and efficacy of streptomycin and oxytetracycline as a part of their plant disease arsenal since the middle of the 20th century. With climate change intensifying plant bacterial epidemics, the established success of these antibiotics remains threatened. Our strong reliance on certain antibiotics for devastating diseases eventually gave way to resistance development. Although antibiotics in plant agriculture equal to less than 0.5% of overall antibiotic use in the United States, it is still imperative for humans to continue to monitor usage, environmental residues, and resistance in bacterial populations. This review provides an overview of the history and use, resistance and mitigation, regulation, environmental impact, and economics of antibiotics in plant agriculture. Bacterial issues, such as the ongoing Huanglongbing (citrus greening) epidemic in Florida citrus production, may need antibiotics for adequate control. Therefore, preserving the efficacy of our current antibiotics by utilizing more targeted application methods, such as trunk injection, should be a major focus. [Formula: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.
Collapse
Affiliation(s)
- Ozgur Batuman
- Department of Plant Pathology, Southwest Florida Research and Education Center, University of Florida, Immokalee, FL
| | - Kellee Britt-Ugartemendia
- Department of Plant Pathology, Southwest Florida Research and Education Center, University of Florida, Immokalee, FL
| | - Sanju Kunwar
- Department of Plant Pathology, Southwest Florida Research and Education Center, University of Florida, Immokalee, FL
| | - Salih Yilmaz
- Department of Plant Pathology, Southwest Florida Research and Education Center, University of Florida, Immokalee, FL
| | - Lauren Fessler
- Department of Plant Pathology, Southwest Florida Research and Education Center, University of Florida, Immokalee, FL
| | - Ana Redondo
- Department of Plant Pathology, Southwest Florida Research and Education Center, University of Florida, Immokalee, FL
| | - Kseniya Chumachenko
- Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL
| | - Shourish Chakravarty
- Department of Food and Resource Economics, Southwest Florida Research and Education Center, University of Florida, Immokalee, FL
| | - Tara Wade
- Department of Food and Resource Economics, Southwest Florida Research and Education Center, University of Florida, Immokalee, FL
| |
Collapse
|
6
|
Islam T, Haque MA, Barai HR, Istiaq A, Kim JJ. Antibiotic Resistance in Plant Pathogenic Bacteria: Recent Data and Environmental Impact of Unchecked Use and the Potential of Biocontrol Agents as an Eco-Friendly Alternative. PLANTS (BASEL, SWITZERLAND) 2024; 13:1135. [PMID: 38674544 PMCID: PMC11054394 DOI: 10.3390/plants13081135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/15/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024]
Abstract
The economic impact of phytopathogenic bacteria on agriculture is staggering, costing billions of US dollars globally. Pseudomonas syringae is the top most phytopathogenic bacteria, having more than 60 pathovars, which cause bacteria speck in tomatoes, halo blight in beans, and so on. Although antibiotics or a combination of antibiotics are used to manage infectious diseases in plants, they are employed far less in agriculture compared to human and animal populations. Moreover, the majority of antibiotics used in plants are immediately washed away, leading to environmental damage to ecosystems and food chains. Due to the serious risk of antibiotic resistance (AR) and the potential for environmental contamination with antibiotic residues and resistance genes, the use of unchecked antibiotics against phytopathogenic bacteria is not advisable. Despite the significant concern regarding AR in the world today, there are inadequate and outdated data on the AR of phytopathogenic bacteria. This review presents recent AR data on plant pathogenic bacteria (PPB), along with their environmental impact. In light of these findings, we suggest the use of biocontrol agents as a sustainable, eco-friendly, and effective alternative to controlling phytopathogenic bacteria.
Collapse
Affiliation(s)
- Tarequl Islam
- Department of Microbiology, Noakhali Science and Technology University, Sonapur, Noakhali 3814, Bangladesh;
| | - Md Azizul Haque
- Department of Biotechnology, Yeungnam University, Gyeongsan 38541, Gyeongbuk, Republic of Korea;
| | - Hasi Rani Barai
- School of Mechanical and IT Engineering, Yeungnam University, Gyeongsan 38541, Gyeongbuk, Republic of Korea;
| | - Arif Istiaq
- Department of Pediatrics, Division of Genetics and Genomic Medicine, Washington University School of Medicine, St Louis, MO 63110-1010, USA
| | - Jong-Joo Kim
- Department of Biotechnology, Yeungnam University, Gyeongsan 38541, Gyeongbuk, Republic of Korea;
| |
Collapse
|
7
|
Sundin GW, Peng J, Brown LE, Zeng Q, Förster H, Adaskaveg JE. A Novel IncX Plasmid Mediates High-Level Oxytetracycline and Streptomycin Resistance in Erwinia amylovora from Commercial Pear Orchards in California. PHYTOPATHOLOGY 2023; 113:2165-2173. [PMID: 37565835 DOI: 10.1094/phyto-06-23-0190-sa] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Isolates of the fire blight pathogen Erwinia amylovora with high-level resistance to oxytetracycline (minimal inhibitory concentration [MIC] > 100 μg/ml) and to streptomycin (MIC > 100 μg/ml) were recovered from four commercial pear orchards in California between 2018 and 2020. The two representative oxytetracycline- and streptomycin-resistant (OxyTcR-SmR) strains 32-10 and 33-1 were as virulent as the antibiotic susceptible strain 13-1 in causing blossom blight of pear and were recovered more than 50% of the time 7 days after co-inoculation to pear flowers with strain 13-1. In the field, inoculation of strain 32-10 to pear flowers that were pretreated with oxytetracycline at 200 μg/ml did not reduce disease compared with an untreated control. Four OxyTcR-SmR strains were subjected to draft genome sequencing to identify the genetic determinants of antibiotic resistance and their location. A 43.6-kb IncX plasmid, designated pX11-7, was detected in each of the four strains, and this plasmid encoded the tetracycline-resistance gene tetB and the streptomycin-resistance gene pair strAB within a large putatively mobile genetic element consisting of the transposon Tn10 that had inserted within the streptomycin-resistance transposon Tn6082. We also determined that pX11-7 was conjugative and was transferred at a rate that was 104 to 105 higher into an E. amylovora strain isolated in California compared with an E. amylovora strain that was isolated in Michigan. The occurrence of high levels of resistance to both oxytetracycline and streptomycin in E. amylovora strains from commercial pear orchards in California significantly limits the options for blossom blight management in these locations.
Collapse
Affiliation(s)
- George W Sundin
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824
| | - Jingyu Peng
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824
| | - Lindsay E Brown
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824
| | - Quan Zeng
- Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station, New Haven, CT 06511
| | - Helga Förster
- Department of Plant Pathology and Microbiology, University of California, Riverside, CA 92521
| | - James E Adaskaveg
- Department of Plant Pathology and Microbiology, University of California, Riverside, CA 92521
| |
Collapse
|
8
|
Kałużna M, Prokić A, Obradović A, Weldon WA, Stockwell VO, Pothier JF. Specific and sensitive detection tools for Xanthomonas arboricola pv. corylina, the causal agent of bacterial blight of hazelnut, developed with comparative genomics. FRONTIERS IN PLANT SCIENCE 2023; 14:1254107. [PMID: 37780515 PMCID: PMC10535005 DOI: 10.3389/fpls.2023.1254107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 08/18/2023] [Indexed: 10/03/2023]
Abstract
Xanthomonas arboricola pv. corylina (Xac; formerly Xanthomonas campestris pv. corylina) is the causal agent of the bacterial blight of hazelnuts, a devastating disease of trees in plant nurseries and young orchards. Currently, there are no PCR assays to distinguish Xac from all other pathovars of X. arboricola. A comparative genomics approach with publicly available genomes of Xac was used to identify unique sequences, conserved across the genomes of the pathogen. We identified a 2,440 bp genomic region that was unique to Xac and designed identification and detection systems for conventional PCR, qPCR (SYBR® Green and TaqMan™), and loop-mediated isothermal amplification (LAMP). All PCR assays performed on genomic DNA isolated from eight X. arboricola pathovars and closely related bacterial species confirmed the specificity of designed primers. These new multi-platform molecular diagnostic tools may be used by plant clinics and researchers to detect and identify Xac in pure cultures and hazelnut tissues rapidly and accurately.
Collapse
Affiliation(s)
- Monika Kałużna
- The National Institute of Horticultural Research, Skierniewice, Poland
| | - Andjelka Prokić
- University of Belgrade, Faculty of Agriculture, Belgrade, Serbia
| | - Aleksa Obradović
- University of Belgrade, Faculty of Agriculture, Belgrade, Serbia
| | | | - Virginia O. Stockwell
- United States Department of Agriculture, Agricultural Research Service, Horticultural Crops Disease and Pest Management Research Unit, Corvallis, OR, United States
| | - Joël F. Pothier
- Environmental Genomics and Systems Biology Research Group, Institute for Natural Resource Sciences, Zurich University of Applied Sciences (ZHAW), Wädenswil, Switzerland
| |
Collapse
|
9
|
Verhaegen M, Bergot T, Liebana E, Stancanelli G, Streissl F, Mingeot-Leclercq MP, Mahillon J, Bragard C. On the use of antibiotics to control plant pathogenic bacteria: a genetic and genomic perspective. Front Microbiol 2023; 14:1221478. [PMID: 37440885 PMCID: PMC10333595 DOI: 10.3389/fmicb.2023.1221478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 06/08/2023] [Indexed: 07/15/2023] Open
Abstract
Despite growing attention, antibiotics (such as streptomycin, oxytetracycline or kasugamycin) are still used worldwide for the control of major bacterial plant diseases. This raises concerns on their potential, yet unknown impact on antibiotic and multidrug resistances and the spread of their genetic determinants among bacterial pathogens. Antibiotic resistance genes (ARGs) have been identified in plant pathogenic bacteria (PPB), with streptomycin resistance genes being the most commonly reported. Therefore, the contribution of mobile genetic elements (MGEs) to their spread among PPB, as well as their ability to transfer to other bacteria, need to be further explored. The only well-documented example of ARGs vector in PPB, Tn5393 and its highly similar variants (carrying streptomycin resistance genes), is concerning because of its presence outside PPB, in Salmonella enterica and Klebsiella pneumoniae, two major human pathogens. Although its structure among PPB is still relatively simple, in human- and animal-associated bacteria, Tn5393 has evolved into complex associations with other MGEs and ARGs. This review sheds light on ARGs and MGEs associated with PPB, but also investigates the potential role of antibiotic use in resistance selection in plant-associated bacteria.
Collapse
Affiliation(s)
- Marie Verhaegen
- Laboratory of Food and Environmental Microbiology, Earth and Life Institute, Catholic University of Louvain (UCLouvain), Louvain-la-Neuve, Belgium
| | - Thomas Bergot
- Laboratory of Food and Environmental Microbiology, Earth and Life Institute, Catholic University of Louvain (UCLouvain), Louvain-la-Neuve, Belgium
| | | | | | | | - Marie-Paule Mingeot-Leclercq
- Cellular and Molecular Pharmacology Unit, Louvain Drug Research Institute, UCLouvain, Woluwe-Saint-Lambert, Belgium
| | - Jacques Mahillon
- Laboratory of Food and Environmental Microbiology, Earth and Life Institute, Catholic University of Louvain (UCLouvain), Louvain-la-Neuve, Belgium
| | - Claude Bragard
- Plant Health Laboratory, Earth and Life Institute, UCLouvain, Louvain-la-Neuve, Belgium
| |
Collapse
|
10
|
Kolozsváriné Nagy J, Móricz ÁM, Böszörményi A, Ambrus Á, Schwarczinger I. Antibacterial effect of essential oils and their components against Xanthomonas arboricola pv. pruni revealed by microdilution and direct bioautographic assays. Front Cell Infect Microbiol 2023; 13:1204027. [PMID: 37389207 PMCID: PMC10303133 DOI: 10.3389/fcimb.2023.1204027] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 06/01/2023] [Indexed: 07/01/2023] Open
Abstract
Bacterial spot of stone fruits caused by Xanthomonas arboricola pv. pruni (Xap) is one of the most significant diseases of several Prunus species. Disease outbreaks can result in severe economic losses while the control options are limited. Antibacterial efficacy of essential oils (EOs) of thyme, cinnamon, clove, rosemary, tea tree, eucalyptus, lemon grass, citronella grass, and lemon balm was assessed against two Hungarian Xap isolates. The minimal inhibitory concentration (MIC) was determined by broth microdilution assay and for the identification of active EOs' components a newly introduced high-performance thin-layer chromatography (HPTLC)-Xap (direct bioautography) method combined with solid-phase microextraction-gas chromatography/mass spectrometry (SPME-GC/MS) was applied. All EOs inhibited both bacterium isolates, but cinnamon proved to be the most effective EO with MIC values of 31.25 µg/mL and 62.5 µg/mL, respectively. Compounds in the antibacterial HPTLC zones were identified as thymol in thyme, trans-cinnamaldehyde in cinnamon, eugenol in clove, borneol in rosemary, terpinen-4-ol in tea tree, citral (neral and geranial) in lemon grass and lemon balm, and citronellal and nerol in citronella grass. Regarding active compounds, thymol had the highest efficiency with a MIC value of 50 µg/mL. Antibacterial effects of EOs have already been proven for several Xanthomonas species, but to our knowledge, the studied EOs, except for lemon grass and eucalyptus, were tested for the first time against Xap. Furthermore, in case of Xap, this is the first report demonstrating that direct bioautography is a fast and suitable method for screening anti-Xap components of complex matrices, like EOs.
Collapse
Affiliation(s)
- Judit Kolozsváriné Nagy
- Plant Protection Institute, Centre for Agricultural Research, Eötvös Lóránd Research Network, Budapest, Hungary
| | - Ágnes M. Móricz
- Plant Protection Institute, Centre for Agricultural Research, Eötvös Lóránd Research Network, Budapest, Hungary
| | - Andrea Böszörményi
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Semmelweis University, Budapest, Hungary
| | - Ágnes Ambrus
- Plant Health Bacteriological Diagnostic National Reference Laboratory, Food Chain Safety Laboratory Directorate, National Food Chain Safety Office, Pécs, Hungary
| | - Ildikó Schwarczinger
- Plant Protection Institute, Centre for Agricultural Research, Eötvös Lóránd Research Network, Budapest, Hungary
| |
Collapse
|
11
|
Yin L, Wang X, Li Y, Liu Z, Mei Q, Chen Z. Uptake of the Plant Agriculture-Used Antibiotics Oxytetracycline and Streptomycin by Cherry Radish─Effect on Plant Microbiome and the Potential Health Risk. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:4561-4570. [PMID: 36945880 DOI: 10.1021/acs.jafc.3c01052] [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: 06/18/2023]
Abstract
Antibiotics are used to control certain bacterial diseases in plant agriculture. Understanding antibiotic uptake by edible vegetables after application and associated risks on plant microbiome and human health is critical. In this study, oxytetracycline and streptomycin, the two most commonly used antibiotics in plant agriculture, were applied to cherry radish via continuous soil drenching to study their translocations into plant tissues, influence on radish microbiome, and the potential health risk to mice. The results demonstrated that oxytetracycline induced hormesis in radish plants and both antibiotics were translocated into the leaves, fruits, and roots of radishes from the soil, with significantly higher plant uptake of streptomycin than oxytetracycline. Interestingly, the proportion of culturable oxytetracycline or streptomycin-resistant bacteria in the antibiotic-accumulated radish tissues was significantly higher than that in the antibiotic-free radish tissues, although both bacterial and fungal communities in different radish tissues were not affected by the accumulated antibiotics, demonstrating that antibiotic application could enrich antibiotic resistance in the plant microbiome. Feeding mice with antibiotics-accumulated radish tissues did not show significant effects on the weight and blood glucose levels of mice. Overall, this study provides important insights into the risk of using antibiotics in plant agriculture.
Collapse
Affiliation(s)
- Lichun Yin
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Xingshuo Wang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Yangyang Li
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Ziyin Liu
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Qinyuan Mei
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| | - Zeyou Chen
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China
| |
Collapse
|