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Skliros D, Papazoglou P, Gkizi D, Paraskevopoulou E, Katharios P, Goumas DE, Tjamos S, Flemetakis E. In planta interactions of a novel bacteriophage against Pseudomonas syringae pv. tomato. Appl Microbiol Biotechnol 2023; 107:3801-3815. [PMID: 37074382 PMCID: PMC10175458 DOI: 10.1007/s00253-023-12493-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 03/14/2023] [Accepted: 03/16/2023] [Indexed: 04/20/2023]
Abstract
The biology and biotechnology of bacteriophages have been extensively studied in recent years to explore new and environmentally friendly methods of controlling phytopathogenic bacteria. Pseudomonas syringae pv. tomato (Pst) is responsible for bacterial speck disease in tomato plants, leading to decreased yield. Disease management strategies rely on the use of copper-based pesticides. The biological control of Pst with the use of bacteriophages could be an alternative environmentally friendly approach to diminish the detrimental effects of Pst in tomato cultivations. The lytic efficacy of bacteriophages can be used in biocontrol-based disease management strategies. Here, we report the isolation and complete characterization of a bacteriophage, named Medea1, which was also tested in planta against Pst, under greenhouse conditions. The application of Medea1 as a root drenching inoculum or foliar spraying reduced 2.5- and fourfold on average, respectively, Pst symptoms in tomato plants, compared to a control group. In addition, it was observed that defense-related genes PR1b and Pin2 were upregulated in the phage-treated plants. Our research explores a new genus of Pseudomonas phages and explores its biocontrol potential against Pst, by utilizing its lytic nature and ability to trigger the immune response of plants. KEY POINTS: • Medea1 is a newly reported bacteriophage against Pseudomonas syringae pv. tomato having genomic similarities with the phiPSA1 bacteriophage • Two application strategies were reported, one by root drenching the plants with a phage-based solution and one by foliar spraying, showing up to 60- and 6-fold reduction of Pst population and disease severity in some cases, respectively, compared to control • Bacteriophage Medea1 induced the expression of the plant defense-related genes Pin2 and PR1b.
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Affiliation(s)
- Dimitrios Skliros
- Laboratory of Molecular Biology, Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece
| | - Polyxeni Papazoglou
- Laboratory of Molecular Biology, Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece
| | - Danai Gkizi
- Department of Wine, Vine and Beverage Sciences, School of Food Sciences, University of West Attica, 12243, Athens, Greece
| | - Eleni Paraskevopoulou
- Laboratory of Molecular Biology, Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece
| | - Pantelis Katharios
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, 71500, Heraklion, Greece
| | - Dimitrios E Goumas
- Laboratory of Plant Pathology-Bacteriology, Department of Agriculture, School of Agricultural Sciences, Hellenic Mediterranean University, 71004, Heraklio, Estavromenos, Greece
| | - Sotirios Tjamos
- Laboratory of Plant Pathology, Department of Crop Science, School of Plant Sciences, Agricultural University of Athens, 1855, Athens, Greece.
| | - Emmanouil Flemetakis
- Laboratory of Molecular Biology, Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece.
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Paraskevopoulou E, Andreou V, Dermesonlouoglou EK, Taoukis PS. Combined effect of pulsed electric field and osmotic dehydration pretreatments on mass transfer and quality of air-dried pumpkin. J Food Sci 2022; 87:4839-4853. [PMID: 36250503 DOI: 10.1111/1750-3841.16350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 09/09/2022] [Accepted: 09/15/2022] [Indexed: 11/29/2022]
Abstract
Pulsed electric field (PEF) and osmotic dehydration (OD) pretreatment can accelerate the time-consuming drying process and minimize its high energy demands. The effect of PEF and OD pre-processing conditions and osmotic solution composition on mass transfer kinetics (water loss, solid gain, water activity) and quality properties (color, texture, total sensory quality) during OD and subsequent air-drying (AD) of pumpkin was studied. Application of PEF (2.0 kV/cm-1500 pulses) significantly enhanced mass transfer during subsequent air-drying (increased effective diffusivity coefficient Des and drying rate kdrying , respectively). PEF and OD treatments led to a significant reduction of the processing time by 12 and 10%, respectively (p < 0.05). The maximum reduction of processing time by 27% (p < 0.05) (compared to untreated sample) resulted in combined use of PEF and OD as pretreatments prior to AD. When PEF pretreatment was combined with OD prior to AD, the corresponding energy was by 50% less than the respective energy required for nonprocessed samples. PRACTICAL APPLICATION: Pulsed electric fields (PEF) and osmotic dehydration (OD) can be applied for the production of air-dried pumpkin cuts of superior quality (in terms of quality and sensory characteristics) and reduced energy requirements (as a result of total processing time decrease).
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Affiliation(s)
- Eleni Paraskevopoulou
- School of Chemical Engineering, Laboratory of Food Chemistry and Technology, National Technical University of Athens, Iroon Polytechniou, Polytechnioupoli Zorafou, Athens, Greece
| | - Varvara Andreou
- School of Chemical Engineering, Laboratory of Food Chemistry and Technology, National Technical University of Athens, Iroon Polytechniou, Polytechnioupoli Zorafou, Athens, Greece
| | - Efimia K Dermesonlouoglou
- School of Chemical Engineering, Laboratory of Food Chemistry and Technology, National Technical University of Athens, Iroon Polytechniou, Polytechnioupoli Zorafou, Athens, Greece
| | - Petros S Taoukis
- School of Chemical Engineering, Laboratory of Food Chemistry and Technology, National Technical University of Athens, Iroon Polytechniou, Polytechnioupoli Zorafou, Athens, Greece
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Xanthopoulos A, Giamouzis G, Tryposkiadis K, Paraskevopoulou E, Paraskevopoulou P, Karagiannis G, Patsilinakos S, Parissis J, Farmakis D, Butler J, Skoularigis J, Triposkiadis F. A simple score for early risk stratification in acute heart failure. Int J Cardiol 2017; 230:248-254. [DOI: 10.1016/j.ijcard.2016.12.131] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 12/03/2016] [Accepted: 12/17/2016] [Indexed: 12/11/2022]
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Skoura M, Xanthopoulos A, Geladaki B, Theofanakis H, Paraskevopoulou E, Patsilinakos S, Paraskevopoulou P. P-037 Is free TFPI low plasma levels a new risk factor in women with coronary artery disease? Thromb Res 2013. [DOI: 10.1016/s0049-3848(13)70083-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Skoura M, Kapogiannis P, Christou A, Marinakos A, Theodoridis D, Paraskevopoulou E, Paraskevopoulou P, Patsilinakos S. P.25 Association of adiponectin levels with abdominal obesity in hypertensive women. Thromb Res 2011. [DOI: 10.1016/s0049-3848(11)70080-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Skoura M, Christou A, Theodoridis D, Kapogiannis P, Mavrolia M, Deilakis E, Paraskevopoulou E, Paraskevopoulou P. P.41 Endogenous thrombin generation (ETP) in anticoagulated women. Thromb Res 2011. [DOI: 10.1016/s0049-3848(11)70096-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Papachristou E, Hadjianghelou H, Darakas E, Alivanis K, Belou A, Ioannidou D, Paraskevopoulou E, Poulios K, Koukourikou A, Kosmidou N, Sortikos K. Perspectives for integrated municipal solid waste management in Thessaloniki, Greece. Waste Manag 2009; 29:1158-1162. [PMID: 18621520 DOI: 10.1016/j.wasman.2008.04.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2007] [Revised: 04/04/2008] [Accepted: 04/14/2008] [Indexed: 05/26/2023]
Abstract
Local authorities need updated and reliable data on the quantity and the quality of the waste generated in their area, in order to establish an integrated solid waste management system capable of fulfilling regional and national waste management targets. This paper presents information about the quantity and the characteristics of the municipal solid waste generated in Thessaloniki, which is the second largest city in Greece. It is based on the results of three research programs investigating the evolution of municipal solid waste. The investigations were carried out over the last 20 years at the landfill of Thessaloniki by the same research group using statistically acceptable practices for sampling and hand sorting. The results show a great increase in the incoming quantities during the last years and a significant increase of the per capita generation. There is also a significant change in the composition, demonstrated mainly by a decrease in the organic fraction followed by an increase of packaging materials (paper and plastic).
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Affiliation(s)
- E Papachristou
- Laboratory of Environmental Engineering and Planning, Division of Hydraulics and Environmental Engineering, Department of Civil Engineering, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece
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Haritanti A, Karacostas D, Drevelengas A, Kanellopoulos V, Paraskevopoulou E, Lefkopoulos A, Economou I, Dimitriadis AS. Spontaneous intracranial hypotension: clinical and neuroimaging findings in six cases with literature review. Eur J Radiol 2008; 69:253-9. [PMID: 18182266 DOI: 10.1016/j.ejrad.2007.10.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2007] [Revised: 04/27/2007] [Accepted: 10/16/2007] [Indexed: 12/24/2022]
Abstract
Spontaneous intracranial hypotension (SIH) is an uncommon but increasingly recognized syndrome. Orthostatic headache with typical findings on magnetic resonance imaging (MRI) are the key to diagnosis. Delayed diagnosis of this condition may subject patients to unnecessary procedures and prolong morbidity. We describe six patients with SIH and outline the important clinical and neuroimaging findings. They were all relatively young, 20-54 years old, with clearly orthostatic headache, minimal neurological signs (only abducent nerve paresis in two) and diffuse pachymeningeal gadolinium enhancement on brain MRI, while two of them presented subdural hygromas. Spinal MRI was helpful in detecting a cervical cerebrospinal fluid leak in three patients and dilatation of the vertebral venous plexus with extradural fluid collection in another. Conservative management resulted in rapid resolution of symptoms in five patients (10 days-3 weeks) and in one who developed cerebral venous sinus thrombosis, the condition resolved in 2 months. However, this rapid clinical improvement was not accompanied by an analogous regression of the brain MR findings that persisted on a longer follow-up. Along with recent literature data, our patients further point out that SIH, to be correctly diagnosed, necessitates increased alertness by the attending physician, in the evaluation of headaches.
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Affiliation(s)
- A Haritanti
- Department of Radiology, Aristotele's University School of Medicine, AHEPA University Hospital, 54636 Thessaloniki, Greece
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Paraskevopoulou E, Economou A, Panagopoulos P, Zikopoulos M, Petrakos G, Koutras I. Cervix cancer screening among Greek and immigrant women: the experience of a Greek District Hospital. CLIN EXP OBSTET GYN 2005; 32:52-4. [PMID: 15864939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
PURPOSE To explore whether there are differences in Papanicolaou (Pap) smear screening between native and immigrant women that attended our outpatient clinic. METHODS In this retrospective study, from January 2002 until December 2003 we examined age, nationality, marital status, economic status (self-reported family income per year) and previous Pap test screening frequency; 3,316 women were included in the study. RESULTS The average age was 41.95 years. The majority of the women who had had a Pap test (58.4%) were Greeks and 41.6% immigrants. Regarding marital status a percentage of 61.2% were married, 13.7% were single and 24.9% were divorced. Regarding economic status 71.0% of the women had a low-income, 25.1% a middle-income and 3.8% a high-income. Of the women 24.99% had never had a Pap test in their lives. DISCUSSION/CONCLUSION The possibility of having easy access to a clinic and to routine health care has a critical influence on the cancer screening habits of immigrant women. Opportunistic Pap smear screening as part of a pregnancy or family-planning checkup in local clinics is an acceptable strategy for poor immigrant women.
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Affiliation(s)
- E Paraskevopoulou
- Department of Obstetrics and Gynaecology, Tzaneio Hospital, Piraeus, Greece
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Abstract
Hospitals often invest significant resources in the development of large and complex information systems that must be modified and extended to respond to changing requirements and to exploit the capabilities offered by modern technologies. A disciplined approach of managing the evolution of hospital information systems is then required so that to meet the increasing demands for effective and efficient use of scarce resources. This paper takes a process oriented view of the hospital and presents an approach based on hospital process modeling which aims at assessing the current status of computer support within a hospital and at identifying new opportunities for automation. The approach is illustrated by an example taken from a major Greek hospital.
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