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Sotiris Tjamos

Assistant Professor
2105294519
2105294513
sotiris@aua.gr

Personal Info

PROFESSIONAL EXPERIENCE:

  • 2014-present: Assistant Professor, Phytopathology Laboratory, Agricultural University of Athens, Greece
  • 2011-2014: Lecturer, Phytopathology Laboratory, Agricultural University of Athens, Greece
  • 2005-2010: Postdoc at the Phytopathology Laboratory, Agricultural University of Athens, Greece

DEGREES:

  • 2005: PhD, Agricultural University of Athens, Greece
  • 2002: MSc, Agricultural University of Athens, Greece
  • 1996: Diploma in Biology, Imperial College of Science Technology and Medicine, University of London 
Title Credits Undergrad/Postgrad Compulsory/Elective
Postgraduate
Postgraduate
Advanced Phytopathology (Diseases of vegetable and ornamental plants) Undergraduate Compulsory
Principles and methods of plant disease managment Undergraduate Elective
Phytopathology Undergraduate Compulsory
Phytopathology Undergraduate Compulsory
Postgraduate

Biological control of soilborne plant pathogens

Soilborne pathogens cause widespread, heavy economic losses to a wide range of crops. Fusarium oxysporum and Verticillium dahliae are major soilborne fungi causing serious economic losses to farmers, as there are no chemical treatments to control them. Therefore, the use of biocontrol agents (BCAs) is an appealing control strategy for the conventional and organic farming. In this frame, a number of different bacterial and fungal isolates are tested against F. oxysporum and V. dahliae under greenhouse and field conditions. Along their suppressive activity, the mode of action of the most efficacious isolates is examined through bioassays, microbiological and elaborate molecular techniques

V. dahliae & F. oxysporum - host plant molecular interaction

The responses of Arabidopsis thaliana mutant plants impaired in known pathogen response pathways are used to explore the plant defence mechanisms deployed against V. dahliae and F. oxysporum. Analysis of the mutant responses have revealed enhanced resistance in etr1-1 [ethylene receptor mutant] plants. qPCR analysis showed that V. dahliae vascular colonisation was reduced in the etr1-1 plants compared to the wt. Furthermore, microarray experiments indicated that the defence response of etr1-1 plants against V. dahliae is dependent on a set of defence genes activated upon pathogen invasion

Plant pathogens & Food safety

Aspergillus carbonarius and A. niger are the main ochratoxicogenic producing fungi in the Mediterranean vineyards. The presence of both fungi has been also confirmed in the greek vineyards. Control strategies include the use of fungicides and biocontrol agents (yeasts). In a number of published studies, it was shown that the use of fungicides with cyprodinil+fludioxonil as active ingredients, at veraison reduces sour rot incidence and Aspergillus sp. on grapes along with ochratoxin A levels in must. Similarly, an Aureobasidium pullulans isolate showed to reduce significantly sour rot incidence and ochratoxin A levels in must

Molecular identification of plant pathogens

A number of different Phytophthora isolates from woody and ornamental trees have been characterized on a molecular basis

Fatouros G., Gkizi D., Fragkogeorgi G., Paplomatas E.J., Tjamos S.E. 2017. Biological control of Pythium, Rhizoctonia and Sclerotinia in lettuce: the plant protective activity of the bacterium Paenibacillus alvei K165 is associated with the induction of systemic resistance. Plant Pathology doi: 10.1111/ppa.12747

Kefalogianni I., Gkizi D., Pappa E., Dulaj L., Tjamos S.E., Chatzipavlidis I. 2017. Combined use of biocontrol agents and zeolite as a management strategy against Fusarium and Verticillium wilt. BioControl 62: 139-150

Gkizi D., Lehmann S., L’Haridon F., Serrano M., Paplomatas E.J., Métraux J.P., Tjamos S.E. 2016. The innate immune signaling system as a regulator of disease resistance and ISR activity against Verticillium dahliaeMolecular Plant Microbe Interactions 29: 313-323

Fousia S., Paplomatas E.J., and Tjamos S.E. 2016. Bacillus subtilis QST 713 confers protection to tomato plants against Pseudomonas syringae pv tomato and induces plant defence-related genes. Journal of Phytopatholgy 164: 264-270

Markakis E.A., Tjamos S.E., Antoniou P.P., Paplomatas E.J., Tjamos E.C. 2016. Biological control of Verticillium wilt of olive by Paenibacillus alvei, strain K165. BioControl 61: 293-303

Lehmann S., Serrano M., L’Haridon F., Tjamos S.E., and Metraux J.P. 2015. Reactive oxygen species and plant resistance to fungal pathogens. Phytochemistry 112: 54-62

Gkizi D., Santos-Rufo A., Rodrıguez-Jurado D., Paplomatas E.J., and Tjamos S.E. 2015. The b-amylase genes: negative regulators of disease resistance for Verticillium dahliaePlant Pathology 64: 1484-1490

Angelopoulou D.J.,  Naska E.J.,  Paplomatas E.J., and  Tjamos S.E. 2014. Biological control agents (BCAs) of verticillium wilt: influence of application rates and delivery method on plant protection, triggering of host defence mechanisms and rhizosphere populations of BCAs. Plant Pathology 63: 1062–1069

Charalambous A., Tjamos S.E., Domazakis E., and Paplomatas E.J. 2013. Incorporation into the transplant soil plug of the plant protective agent Paenibacillus alvei strain K165 confers protection to melon against Fusarium wilt. BioControl 58: 685-692

Pantelides Ι.S., Tjamos S.E., Pappa S., Kargakis M., and Paplomatas E.J. 2013. The ethylene receptor ETR1 is required for Fusarium oxysporum pathogenicity. Plant Pathology 62: 1302-1309

Papasotiriou F.G., Varypatakis K.G., Christofi N., Tjamos S.E., and Paplomatas E.J. 2013. Olive mill wastes: A source of resistance for plants against Verticillium dahliae and a reservoir of biocontrol agents. Biological Control 67: 51-60

Stephou V.K., Tjamos S.E., Paplomatas E.J., and Athanassiou C.G. 2012. Transformation and attachment of Beauveria bassiana conidia on the cuticle of Tribolium confusum and Sitophilus oryzae in conjunction with diatomaceous earth. Journal of Pest Science 85: 387–394

Gizi D., Stringlis I.A., Tjamos S.E., and Paplomatas E.J. 2011. Seedling vaccination by stem injecting a conidial suspension of F2, a non-pathogenic. Fusarium oxysporum strain, suppresses Verticillium wilt of eggplant. Biological Control 58: 387–392

Schoina C., Stringlis I., Pantelides I., Tjamos S.E., and Paplomatas, E.J. 2011. Evaluation of application methods and biocontrol efficacy of Paenibacillus alvei strain K-165, against the cotton black root rot pathogen Thielaviopsis basicolaBiological Control 58: 68-73

Tsopelas P., Paplomatas E.J., Tjamos S.E., Soulioti N., and Elena K. 2011. First Report of Phytophthora ramorum on Rhododendron in Greece Plant Disease 95: 223

Tsopelas P., Paplomatas E.J., Tjamos S.E., and Elena K. 2011. First Record of Phytophthora nicotianae Causing Leaf Blight on Rhododendron in Greece Plant Disease 95: 777

Markakis E, Tjamos S.E., Antoniou P., Roussos P., Paplomatas, E.J., and Tjamos E.C. 2010. Phenolic Responses of Resistant and Susceptible Olive Cultivars Induced by Defoliating and Nondefoliating Verticillium dahliae Pathotypes. Plant Disease 94: 1156-1162

Pantelides I., Tjamos S.E., and Paplomatas, E.J. 2010. Ethylene perception via ETR1 is required in Arabidopsis infection by Verticillium dahliaeMolecular Plant Pathology 11: 191-202

Pantelides I., Tjamos S.E., and Paplomatas, E.J. 2010. Insights into the role of ethylene perception in tomato resistance to vascular infection by Verticillium dahliaePlant Pathology 59: 130-138

Pantelides I., Tjamos S.E., Striglis I., Chatzipavlidis I., and Paplomatas, E.J. 2009. Mode of action of a non-pathogenic Fusarium oxysporum strain against Verticillium dahliae using Real Time QPCR analysis and biomarker transformation. Biological Control 50: 30-36

Markakis E, Tjamos S.E., Antoniou P., Paplomatas, E.J., and Tjamos E.C. 2009. Symptom development, pathogen isolation and Real Time QPCR quantification as important factors for evaluating resistance of olive cultivars to Verticillium pathotypes. European Journal of Plant Pathology 124: 603-611

Markakis EA., Tjamos SE., Chatzipavlidis I., Antoniou P.P., and Paplomatas E.J. 2008. Evaluation of compost amendments for control of vascular wilt diseases. Journal of Phytopathology 156: 622- 627

Antonopoulos D.F., Tjamos S.E., Antoniou P.P., Rafeletos P., Tjamos E.C. 2008. Effect of Paenibacillus alvei, strain K165, on the germination of Verticillium dahliae microsclerotia in planta. Biological Control 46: 166-170

Antoniou P.P., Markakis E.A., Tjamos S.E., Paplomatas E.J., and Tjamos E.C. 2008. Novel methodologies in screening and selecting olive varieties and root-stocks for resistance to Verticillium dahliaeEuropean Journal of Plant Pathology 122: 549-560

Dimakopoulou M., Tjamos S.E., Antoniou P.P., Pietri A., Battilani P., Avramidis N., Markakis E.A., and Tjamos E.C. 2008. Phyllosphere grapevine yeast Aureobasidium pullulans reduces Aspergillus carbonarius (sour rot) incidence in wine producing vineyards in Greece. Biological Control 46: 158-165

Malandraki I., Tjamos S.E., Pantelides I., and Paplomatas, E.J. 2008. Thermal inactivation of compost suppressiveness implicates possible biological factors in disease management. Biological Control 44: 180- 187

Tjamos S.E., Markakis, E., Antoniou, P., and Paplomatas, E.J. 2006. First record of Fusarium wilt of tobacco in Greece imported as seedborne inoculum. Journal of Phytopathology 154: 193- 196

Tjamos S.E., Antoniou, P., and Tjamos E.C. 2006. Aspergillus spp., distribution, population composition and ochratoxin A production in wine-producing vineyards in Greece. International Journal of Food Microbiology 111: S61- S66

Kalogiannis S., Tjamos S.E., Antoniou P.P., Ziogas B.N. and Tjamos, E.C. 2006. Selection and evaluation of phyllosphere yeasts as biocontrol agents against grey mould of tomato. European Journal of Plant Pathology 116:69–76

Tjamos, S.E., Flemetakis, E., Paplomatas, E.J. and Katinakis, P. 2005. Induction of resistance to Verticillium dahliae in Arabidopsis thaliana by the biocontrol agent K-165 and Pathogenesis-Related Proteins Gene Expression. Molecular Plant Microbe Interactions 18: 555- 561

Paplomatas, E.J., Tjamos, S.E., Malandrakis, A.A., Kafka, A., and Zouvelou, V.S. 2005. Evaluation of composts amendments for suppressiveness against Verticillium wilt of eggplant and study of mode of action using a novel Arabidopsis pathosystem. European Journal of Plant Pathology 112: 183-189

Tjamos E.C., Tsitsigiannis, D.I., Tjamos, S.E., Antoniou, P.P., and Katinakis, P. 2004. Selection and screening of endorhizosphere bacteria from solarised soils as biocontrol agents against Verticillium dahliae of solanaceous hosts. European Journal of Plant Pathology 110: 35-44

Tjamos S.E, Antoniou P.P., Kazantzidou A., Antonopoulos D.F., Papageorgiou Ι., and Tjamos E.C. 2004. Aspergillus niger and Aspergillus carbonarius in Corinth raisin and wine-producing vineyards in Greece. Population composition, ochratoxin A production and chemical control. Journal of Phytopathology 152: 250- 255

Tjamos E.C., Antoniou, P.P., Tjamos, S.E. 2000. Implementation of soil solarization in Greece: conclusions and suggestions. Crop Protection 19: 843-846