Photoexcitable Membranes

Head of Department

Prof. Anelia Dobrikova, PhD

  • E-mail:
  • Phone: 02 979 2603
  • Address: “Acad. G. Bonchev” Str., Block 21, Room 217
    Sofia 1113, Bulgaria


Main research topics

Mechanisms of light energy transduction in biological membranes (higher plants, green algae, cyanobacteria and their mutants); role of the structural organization of pigment-protein complexes, lipid composition and physicochemical properties of thylakoid membranes for the effectiveness of primary photosynthetic processes; pigment-lipid interactions in model membranes; mechanisms of adaptation of photosynthetic apparatus; role of lipid-protein interactions in response of photosynthetic organisms to environmental changes; involvement of reactive oxygen species in stress-induced inactivation processes; development of biosensors using photosynthetic membranes.

Research projects

Current projects

  1. Investigating the role of polyphenols and the effect of nanocomposite-based humic acid on basil photosynthesis under drought conditions”, sponsored by Bulgarian Science Research Fund, КП-06-М 76/3,
    Bulgarian National Science Fund, 2023-2025,
    Project leader: Assoc. Prof. Martin Stefanov, PhD
  2. Nitric oxide-induced defense mechanisms of the photosynthetic apparatus and the photosynthetic process under salinity, КП-06-Н36/9,
    Bulgarian National Science Fund, 2019-2023,
    Project leader: Prof. Emilia Apostolova, PhD

Past projects

  1. Functional activity of the photosynthetic apparatus of C3 and C4 type plants under salt stress conditions,
    Project for future and science career development, National Research Programme “Young scientists and postdoctoral students” 2022-2024
    Young scientist – Sen. Assist. Prof. Martin Stefanov, PhD; Scientific supervisor – Prof. Emilia Apostolova, PhD
  2. National Science Program “Healthy food for strong bioeconomics and quality of life”, Funded by MES, ДСД-3, 2019-2023
    Coordinator from IBPhBME-BAS Prof. Antoaneta Popova
  3. Influence of drought on photosynthesis of corn and sorghum, КП-06-ПМ- 46/3,
    Bulgarian National Science Fund, 2020-2022,
    Project leader: Sen. Assist. Prof. Martin Stefanov, PhD
  4. Structure-functional characterization of cyanobacterial mutants during state transitions.
    Bilateral Agreements for Scientific Cooperation between the Bulgarian Academy of Sciences and the Hungarian Academy of Sciences (2019-2021)
    Project coordinator from IBPhBME-BAS: Assoc. Prof. Radka Vladkova
  5. Synthesis of metallic nanoparticles and evaluating its uptake and effects on photosynthesis using biophysical techniques
    Cooperation between Bulgarian Academy of Sciences and Biophysical Department, Faculty of Sciences, Cairo University, Giza, Egypt, 2019-2021.
    Project coordinator from IBPhBME-BAS Prof. E. Apostolova
  6. Role of carotenoids for effectiveness and stability of photosynthetic apparatus of higher plants exposed to changes in environmental conditions, KП-06-Н26/11,
    Bulgarian National Science Fund, 2018-2021
    Project coordinator: prof. Antoaneta Popova
  7. Protection and adaptation of Paulownia under salt stress, Program for career development of young scientists, BAS 2017-2019
    Project leader: PhD student Martin Stefanov
    Scientific supervisor: Prof. Dr. Emilia Apostolova
  8. Impact of excessive nitrogen and metal pollutions on plant defence mechanisms,
    Bilateral scientific and technical cooperation between the Republic Bulgaria and Slovak Republic, National Science Fund: Project DNTS/Slovakia 01/10, 2016-2019
    Project coordinator from IBPhBME-BAS: Prof. Emilia Apostolova
  9. Potential evaluation of different plant species for phytoremediation of heavy metal pollution. Mechanisms of tolerance of the photosynthetic apparatus, Bilateral Agreements for Scientific Cooperation between the Bulgarian Academy of Sciences and The Aristotle University of Thessaloniki, Greece (2018-2020)
    Project coordinator from BAS: Assoc. Prof. A.G. Dobrikova
  10. Effect of high light intensity on the photosynthetic apparatus of two hybrid lines Paulownia grown in saline soils
    Program for career development of young scientists, BAS, ДФНП-138/12.05.2016, 2016-2017
    Young scientist: Martin Stefanov – PhD student
    Supervisor: Prof. Emilia Apostolova
  11. Effects of Chlorella vulgaris on the photosynthetic apparatus of the rice plants in terms of cadmium Program for career development of young scientists, BAS, ДФНП-137/12.05.2016, 2016-2017
    Young scientist: Ekaterina Yotsova – PhD student
    Supervisor: Prof. Emilia Apostolova
  12. Prenylquinones and carotenoids – potential mediators of tolerance of higher plants to combined light and temperature stress
    Ministry of Education, Yough and Science, Bulgarian-Swiss Investigation Programm, № IZEBZO-143169/1, 2012-2015
    Coordinator: Prof. Maya Velitchkova
  13. Effect of reduced carotenoid content for stability of photosynthetic apparatus towards high light intensity of Arabidopsis thaliana. Investigation in vivo,
    Project funded by BAS – BAS, 2015-2017
    Coordinator: Assoc. Prof. Antoaneta Popova
  14. Characterization of the process of photobleaching of photosynthetic pigments in thylakoid membranes of Arabidopsis thaliana, wt and carotenoid mutant lut2, under high light illumination
    Project funded by BAS – BAS, 2015-2017
    Coordinator: Assoc. Prof. Antoaneta Popova
  15. Effect of antioxidants and signaling molecules on the photosynthetic apparatus and its resistance to abiotic stress
    Project funded by BAS, 2015-2016
    Coordinator: Assoc. Prof. Anelia G. Dobrikova
  16. Adaptation mechanisms of photosynthetic apparatus to salinization
    Project funded by BAS, 2015-2017
    Coordinator: Prof. Dr. Emilia Apostolova
  17. Influence of temperature and light on the kinetics of transitions between state 1 and state 2 and their characteristics in vivo. Role of cytochrome b6f complex in their regulation.
    Project funded by BAS, 2014-2016
    Coordinator: Assoc. Prof. Radka Vladkova
  18. Possibilities for application of green algae for creation of biosensors for registration of herbicides and heavy metals
    Project funded by BAS – BAS, 2013-2015
    Coordinator: Prof. Emilia Apostolova
  19. Studies on the salinity tolerance of two lines Paulownia
    Joint project of Sofia University – Faculty of Biology and IBPhBME – BAS, 2014
    Project leader: Prof. Y. Markovska
  20. Investigation of V-B irradiation on the photosynthetic apparatus of different ecotypes of Arabidopsis thaliana
    Budgetary subsidy of Bulgarian Academy of Sciences; 2011 – 2013
    Project leader: Assoc. Prof. A. Popova
  21. Swelling of spongious lipid phase by insertion of peptides, polymers and amphiphilic substances
    Bilateral project between BAS and CAS, 2011
    Project leader: Dr. R. Mutafchieva
  22. Antarctic algae – model system for oxidative stress (ДО02-317/08)
    National Science Fund, 2009-2012
    Project leader: Assoc. Prof. Dr. I. Puneva
  23. Development of biosensors using photoexitable membranes
    National Science Fund, № БИн-01/07,
    Indo-Bulgarian inter-governmetal programme of cooperation in science and technology; 2007 – 2012
  24. Design of new ligands of opiodic receptors: Synthesis and analgetic activity of non-narcotic cationic opiodic oligopeptides
    National Science Fund, MU-FS-13 (2007-2010). Joint project between IMB, IBPBME anf INB – BAS
    Project leader: assoc. Pro. T. Paypanova (IMB)
  25. The lipid component of thylakoid membranes as a factor for photosynthetic activity under environmental stress (K-807/1998)
    National Science Fund, 1998-2003
    Project leader: Prof. Dr. M. Velitchkova
  26. Structural and functional role of light-harvesting complex 2 in mutants of higher plants (К-614/96)
    National Science Fund, 1996-2000
    Project leader: Prof. Dr. E.L. Apostolova
  27. Composition and functions of carotenoids in light harvesting complex of photosystem I of higher plants
    Joint project by the program of bilateral cooperation between Bulgarian Academy of Sciences and CSIC, Spain; 2010 – 2011
    Coordinator from IBPBME: Prof. Dr.  M. Velitchkova
  28. Structural consequences of the modification of lipid, carotenoid and protein composition of photosynthetic membranes
    Joint project by the program of bilateral cooperation between Bulgarian Academy of Sciences and Hungarian Academy of Sciences (contract number 33); funded under the Academy’s bilateral agreements; 2010-2012
    Coordinator from IBPBME: Assoc. Prof. Dr.  E.L. Apostolova
  29. Role of carotenoids for temperature stability of photosynthetic apparatus
    Budgetary subsidy of Bulgarian Academy of Sciences; 2011– 2012
    Project leader: Assoc. Prof. Dr.  E.L. Apostolova
  30. Effect of brassinosteroids on the photosynthetic apparatus of higher plants and its resistance to high-light stress
    Budgetary subsidy of Bulgarian Academy of Sciences; 2010 – 2012
    Project leader:  Assoc. Prof. Dr.  A.G. Dobrikova
  31. Interactions and role of chlorophyll a in cytochrome b6f complex
    Budgetary subsidy of Bulgarian Academy of Sciences; 2010 – 2013
    Coordinator: Dr. R. Vladkova
  32. Structural consequences of the modification of lipid, carotenoid and protein composition of photosynthetic membranes
    Joint project by the program of bilateral cooperation between Bulgarian Academy of Sciences and Hungarian Academy of Sciences (contract number 33); funded under the Academy’s bilateral agreements; 2007-2009
    Coordinator from IBPBME: Assoc. Prof. Dr.  E.L. Apostolova
  33. Spectral properties of the photosystem II reaction centre. Towards the assignment of pigment electronic absorbance bands
    Joint project by the program of bilateral cooperation between Bulgarian Academy of Sciences and CSIC- Spain; 2006-2007
    Coordinator from IBPBME: Prof. Dr. M. Velitchkova
  34. Dynamic and stability of the photosynthetic apparatus
    National Science Fund (Б-1512); 2005-2009
    Project Leader: Assoc. Prof. Dr.  E.L. Apostolova
  35. Photosynthetic apparatus under abiotic stress. Involvement of reactive oxygen species in inactivation processes
    National Science Fund (Б-1504); 2005-2009
    Project Leader: Prof. Dr. M. Velitchkova
  36. Structural Consequences of the modification of lipid, carotenoid and protein composition of photosynthetic membranes
    Joint project by the program of bilateral cooperation between  Bulgarian Academy of Sciences and Hungarian Academy of Sciences (contract number 29); 2004-2006
    Coordinator from IBPBME: Assoc. Prof. Dr. E.L. Apostolova
  37. Stability of the pigment-protein complex LHII from photosynthetic bacteria under extreme environmental conditions as probe by spectroscopic techniques
    Joint project by the program of bilateral cooperation between Bulgarian Academy of Sciences and CSIC- Spain; 2004-2005
    Coordinator from IBFBME: Prof. Dr. M. Velitchkova
  38. Role of chlorophyll-lipid interactions for the assembly and functional stability of photosynthetic light-harvesting complexes
    Budget subsidy of Bulgarian Academy of Sciences; 2004 – 2009
    Project leader: Dr. R. Vladkova
  39. Functional activity and structural stability of pigment-protein complexes of photosynthetic organisms under biotic and abiotic stress. Role of active oxygen species in inactivation processes
    Budget subsidy from Bulgarian Academy of Sciences; 2004 -2005
    Project leader: Prof. Dr. M. Velitchkova
  40. Stability of pigment-protein complexes
    National Science Fund (МY-К-1003/00); 2000-2004
    Project Leader: Assoc. Prof. Dr. A.G. Dobrikova
  41. Energy transfer in biological membranes (K-1301/2003)
    National Science Fund; 2003-2007
    Project Leader: Prof. DSc. S. Taneva
  42. Lipid-chlorophyll interactions
    Bulgarian-German project (BMBF -WTZ  BGR 99 / 008), funded by the International Bureau of the Federal Ministry of Education and Research – Germany (BMBF); 2000-2002
    Project leader from IBPBMI: Dr. R. Vladkova

International collaboration

  • Experimental Station “Aula Dei”, CSIC; Saragosa, Spain.
  • Institute of Plant Biology, BRC, Hungarian Academy of Sciences, Hungary.
  • Max-Planck-Institute for Molecular Plant Physiology, Potsdam, Germany.
  • Kyushu University, Fukuoka, Japan
  • Fakir Mohan University, Department of Biosciences and Biotechnology, Balasor, India.
  • Aristotle University, Thessaloniki, Greece
  • University of Ss. Cyrill and Methodius in Trnava, Slovakia
  • University of Neuchatel, Switzerland
  • University of Western Ontario, London, Canada
  • Umea Plant Sci Ctr, Umea Switzerland
  • Centre of Biotechnology of Borj-Cedria, Hammam-Lif, Tunis
  • Cairo University, Giza, Egypt
  • Jagiellonian University, Krakow, Poland
  • Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia
  • Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Russia
  • Department of Plant Physiology, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia

National collaboration

  • Institute of Plant Physiology and Genetics – BAS
  • Sofia University “St. Kliment Ohridski”, Department of Biology and Department of Physics
  • University of Chemical Technology and Metallurgy
  • Agricultural Academy

Lecture courses

  • Photoprocesses in biological membranes – PhD course by Prof. Dr. E. Apostolova
  • Biophysics of photosynthetic membranes – PhD course by Prof. Dr. M. Velitchkova

Selected publications


  • М. Stefanov, A.K. Biswal, M. Misra, A.N. Misra, E. L. Apostolova.. Responses of Photosynthetic Apparatus to Salt Stress: Structure, Function and Protection. Handbook of Plant and Crop Stress, 4th Edition, Taylor &francis, 2019, 233-250.
  • Dobrikova A.G., Apostolova E.L.. Damage and protection of the photosynthetic apparatus under cadmium stress. Chapter 11. Cadmium Toxicity and Tolerance in Plants: From Physiology to Remediation, 1st Edition, Elsevier, 2019, 275-298, ISBN:9780128148648, DOI:doi. 10.1016/B978-0-12-814864-8.00011-5, Без ISI IF и без SJR – индексирано в WoS или Scopus
  • Gerganova, M., Faik, A., Velitchkova, M. Acquired tolerance of the photosynthetic apparatus to photoinhibition as a result of growing Solanum lycopersicum at moderately higher temperature and light intensity. Functional Plant Biology, 46, 2019, 555-566, DOI:, IF:2.083, Q2
  • Popova, A.V., Dobrev, K., Velitchkova, M, Ivanov, A.G.. Differential temperature effects on dissipation of excess light energy and energy partitioning in lut2 mutant of Arabodopsis thaliana under photoinhibitory conditions.. Photosynth. Res., 139, 1-3, 2019, 367-385, ISSN:0166-8595, DOI:, IF:3.864, Q1
  • Kovacs T, Szalontai B, Kłodawska K, Vladkova R, Malec P, Gombos Z, Laczko-Dobos H. Photosystem I oligomerization affects lipid composition in Synechocystis sp. PCC 6803, BBA – Molecular and Cell Biology of Lipids, 1864, Elsevier, 2019, 1384-1395, DOI:10.1016/j.bbalip.2019.06.013, IF:5.162, Q1
  • Maglovski M., Gregorová Z., Rybanský L., Bardáčová M., Moravčíková J., Bujdoš M., Dobrikova A., Apostolova E., Kraic J., Blehová A., Matušíková I.. Effects of nutrition on wheat photosynthetic pigment responses to arsenic stress. Polish J. Environ. Studies, Vol. 28, 3, 2019, 1-9, ISSN:1230-1485, DOI:DOI:, IF:1.12, Q3


  • Stefanov, E. Yotsova, E.L. Apostolova. Salt- and light-induced changes in spectral characteristics of Paulownia. Comp. rend. Acad. bulg. Sci., 71, 2018, 1062-1069, ISSN:1310–1331, IF:0.251, Q2
  • Faik, A, Stanoeva, D., Velitchkova, M. High light enhanced the inhibitory effect of suboptimal temperatures on oxygen evolving reactions in Arabidopsis thaliana. C. R. Bulg Acad. Sci., 71, 2, Marin Drinov, 2018, 211-219, ISSN:1310–1331, DOI. SJR:0.207, IF:0.251, Q2
  • Picorel, R., Alfonso, M., Velitchkova, M.. Editorial: Molecular Basis of the Response of Photosynthetic Apparatus to Light and Temperature Stress. Front. Plant Sci., 8, 2017, 288, ISSN:ISSN=1664-462X, DOI:DOI 10.3389/fpls.2017.00288, IF:4.495, Q1
  • Stefanov M., Yotsova E., Ivanova K., Markovska Y., Apostolova E.. Effect of high light intensity on the photosynthetic apparatus of two hybrid lines of Paulownia grown on soil with different salinity. Photosynthetica, 56, 2018, 832-840, ISSN:0300-3604,, IF:1.507, Q2
  • Yotsova E., Dobrikova A., Stefanov M., Apostolova E.. Impact of salicylic acid on the grown and activity of photosynthetic apparatus in rice under non-stress conditions. Comp. Rend. Acad. Bulg. Sci., 71, 3, 2018, 368-375, ISSN:1310–1331, DOI:10.7546/CRABS.2018.03.09, IF:0.27, Q2
  • Yotsova E.K., Dobrikova A.G., Stefanov M.A., Kouzmanova M., Apostolova E.L.. Improvement of the rice photosynthetic apparatus defence under cadmium stress modulated by salicylic acid supply to roots. Theor. Exp. Plant Physiology, 30, 1, Springer, 2018, 57-70, ISSN:2197-0025, DOI:10.1007/s40626-018-0102-9,IF:0.885, Q2
  • Chaudhury, A., Ward, Ch., Talasaz, A., Ivanov, A. G., Brophy, M., Grodzinski, B., Huner, N.P.A., Patel, V.I., Barron, J.L.. Machine Vision System for 3D Plant Phenotyping. IEEE/ACM TRANSACTIONS ON COMPUTATIONAL BIOLOGY AND BIOINFORMATICS, VOL. XX,, NO. X, 2018, 1-13, ISSN:1545-5963, DOI:DOI 10.1109/TCBB.2018.2824814, IEEE/ACM,. SJR:0.649, IF:1.609, Q1
  • Elkhouni A., Rabhi M., Ivanov A.G., Krol M., Zorrig W., Smaoui A., Abdelly C., Huner N.P.A.. Structural and functional integrity of Sulla carnosa photosynthetic apparatus under iron deficiency conditions. Plant Biology, 20, 3, 2018, 415-425, DOI:doi: 10.1111/plb.12684, IF:2.216, Q2
  • Jusovich, M, Velitchkova, M, Misheva, S, Börner, A, Apostolova, E, Dobrikova, A. Photosynthetic responses of a wheat mutant (Rht-B1c) with altered DELLA proteins to salt stress. Journal of Plant Growth Regulation, 37, 2, Springer, 2018, 645-656, ISSN:0721-7595,, IF:2.04, Q1
  • Lahmar, I, Radeva, G, Marinkova. D, Velitchkova, M, Belghith,, Ben Abdallah, F, Yotova, L, Belghith, K. Valorization of a plant β-amylase: Immobilization and dataset on the kinetic process. Data in Brief, 16, 2018, 386-391, ISSN:ISSN: 2352-3409,, SJR:0.216, SJR
  • Kurepin, L.V., Stangl, Z.R., Ivanov, A.G., Bui, V., Mema, M., Huner, N.P.A., Öquist. G., Way, D., Hurry, V.. Contrasting acclimation abilities of two dominant boreal conifers to elevated CO2 and temperature. Plant Cell Environ, 41, 2018, 1331-1345, ISSN:0140-7791, DOI:DOI: 10.1111/pce.13158, IF:5.415, Q1
  • Lahmar, I., Radeva, G., Marinkova, D., Velitchkova, M., Belghith, Hafedh, Ben abdallah, Ferjani, Yotova, Lyubov, Belghith, Karima. Immobilization and topochemical mechanism of a new β-amylase extracted from Pergularia tomentosa. Process Biochemistry, 64, Elsevier, 2018, 143-151, ISSN:1359-5113,, IF:2.497, Q2


  • Dobrikova, A.G., Yotsova, E. K., Börner, A., Landjeva, S.P., Apostolova, E.L.. The wheat mutant DELLA-encoding gene (Rht-B1c) affects plant photosynthetic responses to cadmium stress. Plant Physiology and Biochemistry, 114, Elsevier, 2017, 10-18, ISSN:0981-9428, DOI:doi: 10.1016/j.plaphy.2017.02.015, IF:2.718, Q1,
  • Faik, A., Vasilev, D., Stanoeva, D., Velitchkova, M.. Suboptimal growth temperature and light intensity effects on Photosystem II activity and oxygen evolution of tomato (Solanum lycopersicum). Comptes rendus de l’Académie bulgare des Sciences, 70, 9, “Prof. Marin Drinov” Publishing House of BAS, 2017, 1247-1254, ISSN:ISSN 1310–1331 (Print) ISSN 2367–5535 (Online), IF:0.251,  Q2
  • Ivanov, AG, Velitchkova, M, Allakhverdiev, Suleyman I., Huner, NPA. Heat stress-induced effects of photosystem I: an overview of structural and functional responses. Photosynth. Res., 133, Springer, 2017, 17-30, ISSN:0166-8595, DOI:DOI 10.1007/s11120-017-0383-x, IF:3.864, Q1,
  • Popova, A.V.. Spectral characteristics and solubility of β-carotene and zeaxanthin in different solvents. Compt. Rend. Bulg. Acad. Sci., 70, 1, Prof. “Marin Drinov”, 2017, 53-60, ISSN:1310–1331, IF:0.251, Q2
  • Gerganova, M., Stanoeva, D., Popova, A.V., Velitchkova, M. Alterations in pigment content and photosynthetic performance of Arabidopsis thaliana plants under combined action of low temperature and high light. Comptes rendus de l’Académie bulgare des Sciences, 70, 9, 2017, 1255-1261, “Prof. Marin Drinov” Publishing House of BAS, ISSN:2367–5535, IF:0.206, Q2
  • Yotsova, E.K., Stefanov, M.A., Dobrikova, A.G., Apostolova, E.L.. Different sensitivities of photosystem II in green algae and cyanobacteria to phenylurea and phenol-type herbicides: effect on electron donor side, Zeitschrift für Naturforschung C, 72, 7-8, 2017, 315-324, ISSN:1865-7125, DOI:doi: 10.1515/znc-2016-0089, IF:0.882, Q4
  • Chaudhury A., Ward C., Talasaz A., Ivanov A.G., Brophy M., Grodzinski B., Patel R.V., Huner N.P.A., Barron J.L.. Machine vision system for 3D plant phenotyping. arXiv, 2017, ISSN:2331-8422, IF:0.698, Q4
  • Misra, A.N., Singh, R., Misra, M., Vladkova, R., Dobrikova, A.G., Apostolova, E.L.. Nitric Oxide mediated effects on chloroplasts. Photosynthesis: Structures, Mechanisms and Applications. (H.J.M. Hou, M.M. Najafpour, G.F. Moore, S.I. Allakhverdiev, eds.), Chapter 14, Springer, Cham, 2017, 305-320, ISBN:978-3-319-48871-4,, 16,   Без ISI IF и без SJR – индексирано в WoS или Scopus
  • Noridomi, M., Nakamura, S., Tsuyama, M., Futamura, N., Vladkova, R.. Opposite domination of cyclic and pseudocyclic electron flows in short-illuminated dark-adapted leaves of angiosperms and gymnosperms Q1(ISI). Photosynthesis Research, 134, 2, Springer, 2017, 149-164, ISSN:0166-8595, DOI:10.1007/s11120-017-0419-2, IF:3.091, Q1


  • Faik, A., Popova, A.V., Velitchkova, M.. Effects of long-term action of high temperature and high light on the activity and energy interaction of both photosystems in tomato plants. Photosynthetica, 54, 4, 2016, 611-619, DOI:DOI: 10.1007/s11099-016-0644-5, IF:1.558, Q1
  • Dobrev, K., Stanoeva, D., Velitchkova, M., Popova, A.V. The lack of lutein accelerates the extent of light-induced bleaching of photosynthetic pigments in thylakoid membranes of Arabidopsis thaliana. Photochemistry and Photobiology, 92, 2016, 436-445, ISSN:ISSN: 1751-1097, DOI:DOI: 10.1111/php.12576, IF:2.266, Q2
  • Apostolova, E.L., Dobrikova, A.G.. Role of the LHCII organization for the sensitivity of the photosynthetic apparatus to temperature and high light intensity. Handbook of Photosynthesis (ed. M. Pessarakli), Chapter 16, Third edition, Taylor and Francis Group, CRC Press, 2016, 301-314,  ISBN:9781482230734, Без ISI IF и без SJR – индексирано в WoS или Scopus
  • Gerganova, M., Popova, A.V., Stanoeva, D., Velitchkova, M.. Tomato plants acclimate better to elevated temperature and high light than to treatment with each factor separately. Plant Physiology and Biochemistry, 104, 2016, 234-241, ISSN:0981-9428,, IF:2.928, Q1,
  • Gerganova, M., Stanoeva, D., Popova, A.V., Velitchkova, M.. Pigment content and oxygen evolution of tomato plants as affected by long term treatment at suboptimal temperature. Comptes rendus de l’Académie bulgare des Sciences, 69, 11, 2016, 1429-1436, ISSN:2367–5535, IF:0.204, Q2
  • M. Stefanov, E. Yotsova, K. Ivanova, Y. Markovska, E. Apostolova. Assesment the impact of salinity on photosynthetic apparatus of Paulownia elongata x kawakami. Comp. rend. Acad. bulg. Sci., 69, 2016, 1325-1332, IF:0.233, Q2
  • Popova A.V., Hincha D.K.. Effects of flavonol glycosides on liposome stability during freezing and drying. Biochim. Biophys. Acta, Biomembranes, 1858, 12, 2016, 3050-3060, IF:3.687, Q1
  • Stefanov, M., Yotsova, E., Rashkov, G., Ivanova, K., Markovska, Y., Apostolova, E.L.. Effects of salinity on the photosynthetic apparatus of two Paulownia lines. Plant Physiol. Biochem., 101, 2016, ISSN:ISSN: 0981-9428, IF:2.928, Q1
  • Vladkova, R. Chlorophyll a is the crucial redox sensor and transmembrane signal transmitter in the cytochrome b6f complex. Components and mechanisms of state transitions from the hydrophobic mismatch viewpoint. Journal of Biomolecular Structure and Dynamics, 34, 4, Taylor & Francis, 2016, 824-854, ISSN:0739-1102, DOI:10.1080/07391102.2015.1056551, IF:3.123, Q1
  • Bode, R., Ivanov, A.G., Hüner, N.P.A. Global transcriptome analyses provide evidence that chloroplast redox state contributes to intracellular as well as long-distance signalling in response to stress and acclimation in arabidopsis. Photosynthesis Research, 128, 3, 2016, 287-312, ISSN:0166-8595, DOI:10.1007/s11120-016-0245-y, IIF:3.091,  Q1,
  • Flores-Bavestrello, A., Krol, M., Ivanov, A.G., Hüner, N.P.A, García-Plazaola, J. I., Corcuera, L. J., Bravo, L. A. Two hymenophyllaceae species from contrasting natural environments exhibit a homoiochlorophyllous strategy in response to desiccation stress. Journal of Plant Physiology, 191, 2016, 82-94, ISSN:0176-1617, DOI:10.1016/j.jplph.2015.12.003, IF:3.121, Q1
  • Hüner, N.P.A., Dahal, K., Bode, R., Kurepin, L.V., Ivanov, A.G.. Photosynthetic acclimation, vernalization, crop productivity and ‘the grand design of photosynthesis’. Journal of Plant Physiology, 203, 2016, 29-43, ISSN:0176-1617, DOI:10.1016/j.jplph.2016.04.006, IF:3.121, Q1
  • McCarthy, A., Chung, M., Ivanov, A.G., Krol, M., Inman, M., Maxwell, D. P., Hüner, N.P.A. An established arabidopsis thaliana var. landsberg erecta cell suspension culture accumulates chlorophyll and exhibits a stay-green phenotype in response to high external sucrose concentrations. J. Plant Physiol, 199, 2016, 40-51, ISSN:0176-1617, DOI:10.1016/j.jplph.2016.05.008, IF:3.121, Q1


  • Apostolova E.L., Rashkov G., Dankov K., Puneva I., 2015, Influence of the sanosil-induced oxidative stress on the photosynthetic apparatus of different strains of green algae and cyanobacteria, Ind. J. Plant Physiol., 20, 333-338
  • Dankov K., Rashkov G., Misra A.N., Apostolova E.L., 2015, Temperature sensitivity of photosystem II in isolated thylakoid membranes from fluridone-treated pea leaves, Turk. J. Bot., 39, 420-428.
  • Dobrikova A.G., Apostolova E.L., 2015, Damage and protection of the photosynthetic apparatus from UV-B radiation. II. Effect of quercetin at different pH. J. Plant Physiol., 184, 98-105
  • Dobrev K., Stanoeva D., Velitchkova M., Popova A.V., 2015, Alterrations in primary photosynthetic reactions of Arabidopsis thaliana, wt and lut2, under photoinhibition in vivo, Compt. Rend. Bulg. Acad. Sci., 68 (5) 601-608.
  • Popova A.V., Rausch S., Hundertmark M., Gibon Y., Hincha D.K., 2015, The intrinsically disordered protein LEA7 from Arabidopsis thaliana protects the isolated enzyme lactate dehydrogenase and enzymes in a soluble leaf proteome during freezing and drying, Biochim. Biophys. ActaProteins and Proteomics, 1854 (10) 1517-1525.
  • Angelov B., Angelova A.,  Drechsler M., Garamus V. M., Mutafchieva R., Lesieur S., 2015, Identification of large channels in cationic PEGylated cubosome nanoparticles by synchrotron radiation SAXS and Cryo-TEM imaging, Soft Matter 11, 3686-3692
  • Angelova A., Angelov B., Mutafchieva R. , Lesieur S. , 2015, Biocompatible Mesoporous and Soft Nanoarchitectures, J. Inorg. Organomet. Polym. Mater, 25 (2), 214-232
  • Angelova A., Angelov B., Lesieur S., Mutafchieva R., Ollivon M., Bourgaux C., Willumeit R., Couvreur P., 2008, Dynamic control of nanofluidic channels in protein drug delivery vehicles, J. Drug Deliv. Sci. Technol., 18(1), 41-45
  • Mihailova G., Velitchkova M., Doltchinkova V., Lazarova D., Georgieva K., 2015, Photosynthetic characteristics of the resurrection plant Haberlea Rhodopensis from two habitats, Gen. Plant Physiol. 5 (1) 74–85.


  • Apostolova E.L.,  Pouneva I., Rashkov G., Dankov K., Grigorova I., Misra A.N., 2014, Effect of UV-B radiation on Photosystem II functions in Antarctic and mesophilic strains of a green alga Chlorella vulgaris and a cyanobacterium Synechocystis salina, Ind. J. Plant Physiol., 19, 111-118.
  • Dang N. X., Popova A.V., Hundertmark M., Hincha D.K., 2014, Functional characterization of selected LEA proteins from Arabidopsis thaliana in yeast and in vitro, Planta, 240 (2) 325-336.
  • Dobrikova A.G., Vladkova R.S., Rashkov G.D., Todinova S.J., Krumova S.B., Apostolova E.L., 2014, Effects of exogenous 24-epibrassinolide on the photosynthetic membranes under non-stress conditions, Plant Physiol. Biochem., 80, 75-82.
  • Lazarova D., Stanoeva D., Popova A., Vasilev D., Velitchkova M., 2014, UV-B – induced alteration of oxygen evolving reactions in pea thylakoid membranes as affected by scavengers of reactive oxygen species. Biol. Plant. 58 (2) 319-327.
  • Misra A.N., Vladkova R., Singh R., Misra M., Dobrikova A.G., Apostolova E.L., 2014, Action and target sites of nitric oxide in chloroplasts, Nitric Oxide, 39, 35-45
  • Sárvári É., G. Mihailova, Á. Solti, Á. Keresztes, M. Velitchkova, K. Georgieva, 2014, Comparison of thylakoid structure and organization in sun and shade Haberlea rhodopensis populations under desiccation and rehydration, J. Plant Physiol. 151, 1591-1600.
  • Apostolova E. L., Misra A.N., 2014, Alteration in Structural Organization Affect the Functional Ability of Photosynthetic Apparatus, In: Handbook of Plant and Group Physiology, Third Edition (ed. Pessarakli) CRC Press, Taylor & Francis Group, pp.103-120.
  • Ivanov A., Velitchkova M., 2014, Mechanisms of stimulation of photosystem I activity in chloroplast membranes under heat stress. Correlation between P700 photooxidation and thermostability of thylakoid membrane organization In: Photosynthesis: Open Questions and What We Know Today, (Allakhverdiev S. I., Rubin A. B., Shuvalov V.A. eds.), Moscow–Izhevsk: Izhevsk Institute of Computer Science, Vol. II, pp. 377-396.


  • Apostolova E.L., 2013, Effect of high-light on photosynthetic apparatus with different content of anionic lipids and organization of light-harvesting complex of photosystem II, Acta Physiol. Plant., 35, 975-978
  • Dobrikova A.G., Domonkos I., Sözer Ö., Laczkó-Dobos H., Kis M., Párduc Á., Gombos Z.,. Apostolova E.L., 2013, Effect of partial or complete elimination of light-harvesting complexes on the surface electric properties and the functions of cyanobacterial photosynthetic membranes, Physiol. Plantarum., 147, 248-260
  • Dobrikova A.G., Krasteva V., Apostolova E.L., 2013, Damage and protection of the photosynthetic apparatus from UV-B radiation. I. Effect of ascorbate, J. Plant Physiology, 170, 251-257
  • Velitchkova M., Lazarova D., Mihailova G., Stanoeva D., Dolchinkova V., Georgieva K., 2013, Characterization of energy transfer processes and flash oxygen yields of thylakoid membranes isolated from resurrection plant Haberlea rhodopensis subjected to different extent of desiccation, in: Photosynthesis Research for Food, Fuel and Future (Eds. Tingyun Kuang, Congming Lu, Lixin Zhang), pp. 531-534
  • Velitchkova M., Stanoeva D., Popova A., 2013, Sensitivity of two ecotypes of Arabidopsis thaliana (Cvi and Te) towards UV-B irradiation, Compt. rend. Acad. Bulg. Sci., 66, 839-846
  • Popova A.V., Andreeva A., 2013, Carotenoid-lipid interactions, Advances in Planar Lipid Bilayers and Liposomes, 17, 215-236
  • Popova A.V., Hincha D.K., 2013, Interactions of the amphiphiles arbutin and tryptophan with phosphatidylcholine and phosphatidylethanolamine bilayers in the dry state, BMC Biophysics, 6:9


  • Angelov B., Angelova A., Garamus V.M., Drechsler M., Willumeit R., Mutafchieva R., Stepánek P., Lesieur S., 2012, Earliest stage of the tetrahedral nanochannel formation in cubosome particles from unilamellar nanovesicles, Langmuir, 28, 16647-16655
  • Hundertmark M., Popova A.V., Rausch S., Seckler R., Hincha D.K., 2012, Influence of drying on the secondary structure of intrinsically disordered and globular proteins, Biochem. Biophys. Res. Comm., 417, 122-128
  • Rashkov G.R., Dobrikova A.G., Pouneva I.D., Misra A.N., Apostolova E.L., 2012, Sensitivity of Chlorella vulgaris to herbicides. Possibility of using it as a biological receptor in biosensors, Sensors & Actuators: B. Chemical, 161, 151-155


  • Andreeva A., Apostolova I., Velitchkova M., 2011, Temperature dependence of resonance Raman spectra of carotenoids, Spectrochim. Acta A: Mol. Biomol. Spectroscopy, 78, 1261-1265
  • Angelova A., Angelov B., Mutafchieva R., Couvreur P., 2011, Self-assembled multicompartment liquid crystalline lipid carriers for protein, peptide and nucleic acid drug delivery, Acc. Chem. Res., 44, 147-156
  • Angelov B., Angelova A., Mutafchieva R., Lesieur S., Vainio U., Haramus V.M., Jensen G., Pedersen J.S., 2011, SAXS investigation of a cubic to a sponge (L3) phase transition in self-assembly lipid nanocarrier, Phys. Chem. Chem. Phys., 13, 3073-3081
  • Apostolova E.L., Dobrikova A.G., Rashkov G.D., Dankov K.G., Vladkova R.S., Misra A.N., 2011, Prolonged sensitivity of immobilized thylakoid membranes in cross-linking matrix to atrazin, Sen. Actuators B: Chem., 156, 140-146
  • Dankov K., Dobrikova A.G., Ughy B., Bogos B., Gombos Z., Apostolova E. L., 2011, LHCII organization and thylakoid lipids affect the sensitivity of the photosynthetic apparatus to high-light treatment, Plant Physiol. Biochem. 49, 629-635
  • Laczkó-Dobos H., Todinova S.J., Sözer Ö., Komenda J., Kis M., Sallai A., Dobrikova A.G., Ughy B., Debreczeny M., Gombos Z., Apostolova E.L., Domonkos I., 2011, Identification of thylakoid membrane thermal transitions in Synechocystis sp. PCC6803 photosynthetic mutants, Photosynth. Research. 107, 237-246
  • Zlatanov I, Popova A, 2011, Penetration of lysozyme and cytochrom c in lipid bilayers: Fluorescent study, Journal in Membrane Biology, 242 (2) 95-103
  • Popova A.V., Hundertmark M., Seckler R., Hincha D.K., 2011, Structural transitions in the intrinsically disordered plant dehydration stress protein LEA7 upon drying are modulated by the presence of membranes, Biochim. Biophys. Acta-Biomembranes, 1808, 1879-1887
  • Popova A.V., Hincha D.K., 2011, Thermotropic phase behaviour of the non-bilayer lipids phosphatydilethanolamine and monogalactosyldiacylglycerol in the dry state, BMC Biophysics, 4:11
  • Vladkova R., Dobrikova A.G., Singh R., Misra A.N., Apostolova E., 2011, Photoelectron transport ability of chloroplast thylakoid membranes treated with NO donor SNP: Changes in flash oxygen evolution and chlorophyll fluorescence, Nitric Oxide, 24, 84-90
  • Popova A., Andreeva A., 2011, β-carotene-lipid interactions in liposomes with different lipid composition, In: Advances in Planar Lipid Bilayers and Liposomes, vol. 14, 293-307.


  • Krumova S.B., Todinova S.J., Dobrikova A.G., Taneva S.G., 2010, Differential scanning calorimetry of photosynthetic membranes: Resolving contributions of the major photosynthetic complexes to the sequential thermal transitions, Review, Trends in Photochem. Photobiol., 12, 37-51.
  • Apostolova E.L., Dobrikova A.G. (2010) Effect of high temperature and UV-A radiation on the photosystem II, In: Handbook of Plant and Crop Stress, 3rd edition, ed. M. Pessarakli, Taylor and Francis Group. pp. 577-591
  • Andreeva A, Popova A, 2010, Integration of β-carotene molecules in small liposomes, Journal of Physics: Conference Series 253, No 012066
  • Fedina I., Hidema J., Velitchkova M., Georgieva K., Nedeva D., 2010, UV-B induced stress responses in three rice cultivars, Biol. Plant. 54 (3) 571-574
  • Thalhammer A., Hundertmark M., Popova A.V., Secler R., Hincha D.K., 2010, Interaction of two intrinsically disordered plant stress proteins (COR15A and COR15B) with lipid membranes in the dry state, Biochim. Biophys. ActaBiomembranes, 1798, 1812-1820
  • Vladkova R, Koynova R, Teuchner T., Tenchov B., 2010, Bilayer structural destabilization by low amounts of chlorophyll a, Biochim. Biophys. ActaBiomembranes, 1798, 1586-1592.


  • Dankov K., Busheva M., Stefanov D., Apostolova E.L., 2009, Relationship between the degree of carotenoid depletion and function of photosynthetic apparatus, J. Photochem. Photobiol. B. Biology, 96, 49-56.
  • Lazarova D, Popova A., Stanoeva D., Velitchkova M, 2009, Involvement of reactive oxygen radicals in photoinhibition of primary photosynthetic reactions – effect of temperature and oxygen radical scavengers, Biotechnology and Biotechnology Equipment, 23, special Edition/on line, 511-515.
  • Doncheva Sn., Poschenrieder C., Stoyanova Zl., Georgieva K., Velichkova M., Barceló J., 2009, Silicon amelioration of manganese toxicity in Mn-sensitive and Mn-tolerant maize varieties, Environm. Exp. Botany, 65, 189-197
  • Fedina I., Nedeva D., Georgieva K., Velitchkova M., 2009, Methyl jasmonate counteract UV-B stress in barley seedlings, J. Agron. Crop Sci., 195, 204-212
  • Fedina I., Velitchkova M., 2009, Physiological Responses of Higher Plants to UV-B Radiation, In: Climate Changes and Crops, ed. S.N.Singh, Springer, pp. 283-306
  • Fedina I, Velitchkova M., Georgieva K., Nedeva D., Çakırlar H., 2009, UV-B response of greening barley seedlings, Acta Biol. Hung. 60, 195-210
  • Velitchkova M., Abarova S., Lazarova D., Stoichkova K., Stanoeva D., Andreeva A., 2009, Protective effect of histidine against pigment photobleaching in photosystem I particles J. Optoelectron. Adv. Mat., 11, 1230-1233


  • Ivanova P.I., Dobrikova A.G., Taneva S.G, Apostolova E.L., 2008, Sensitivity of the photosynthetic apparatus to UV-A radiation: a role of light-harvesting complex II – photosystem II supercomplex organization, Radiat. Environ. Biophys., 47, 169-177.
  • Apostolova E.L., Domonkos I., Dobrikova A.G. , Sallai A., Bogos B., Wada H., Gombos Z., Taneva S.G., 2008, Effect of phosphatidylglycerol depletion on the surface electric properties and fluorescence emission of thylakoid membranes, J. Photochem. Photobiol. B: Biology, 91, 51-57.
  • Çakırlar H., Çiçek N., Fedina I., Georgieva K., Doğru A., Velitchkova M., 2008, NaCl induced cross-acclimation to UV-B radiation in four barley (Hordeum vulgare L.) cultivars, Acta Physiol. Plant. 30, 561-567


  • Dobrikova A.G., Dimitrov M.I., Taneva S.G., Petkanchin I.B., 2007, Protein-coated b-Ferric Hydrous Oxide Particles. An Electrokinetic and Electrooptic Study”, Colloids and Surfaces  B: Biointerface, 56, 114-120.
  • Andreeva A., Abarova S., Stoichkova K., Picorel R., Velitchkova M. 2007, Selective Photobleaching of chlorophylls and carotenoids in photosystem I particles under high-light treatment, Photochem. Photobiol., 83, 1301-1307
  • Fedina I., Velitchkova M., Georgieva K., Demirevska K., Simova L., 2007, UV-B response of green and etiolated barley seedlings, Biol. Plant., 51, 699-706
  • Komayama, K., Khatoon, M., Takenaka, D., Horie, J., Yamashita, A., Yoshioka, M., Nakayama, Y., Yoshida, M., Ohira, S., Morita, N., Velitchkova, M., Enami, I., Yamamoto, Y., 2007, Quality control of photosystem II: cleavage and aggregation of heat-damaged D1 protein in spinach thylakoids, Biochim. Biophys. ActaBioenergetics, 1767, 838-846.
  • Pouchkina-Stantcheva N.N., McGee B.M., Boschetti C., Tolleter D., Chakrabortee S., Popova A.V., Macherel D., Hincha D.K., Tunnacliffe A., 2007, Functional divergence of former alleles encoding LEA proteins in a desiccation-tolerant, ancient asexual invertebrate, Science, 318, 268-271
  • Popova A.V., Hincha D.K., 2007, Effects of cholesterol on dry bilayers: interactions between phosphatidylcholine unsaturation, and glycolipid or free sugar, Biophys. J., 93, 1204-1214
  • Popova A.V., Veltchkova M., Zanev Y., 2007, Effect of membrane fluidity on photosynthetic oxygen production reactions, Z. Naturforschung 62c, 253-260.


  • Apostolova E.L., Dobrikova A.G., Ivanova P.I, Petkanchin I.B., Taneva S.G., 2006, Relationship between the organization of the supercomplex of PSII and the functions of the photosynthetic apparatus, J. Photochem. Photobiol. B: Biology, 83, 114-122
  • Hincha D.K., Popova A.V., Cacela C., 2006, Effects of sugars on the stability and structure of lipid membranes during drying, In: Advances in Planar Lipid Bilayers and Liposomes, ed. A.L. Leitmanova Liu, vol. 3, Elsevier, pp. 189-217
  • Fedina I., Georgieva K., Velitchkova M., Grigorova I., 2006, Effect of pretreatment of barley seedlings with different salts on the level of UV-B induced and UV-B absorbing compounds, Environm. Exp. Bot., 56, 225-230.
  • Stoitchkova K., Busheva M., Apostolova E., Andreeva A., 2006, Changes in the еnergy distribution in mutant thylakoid membranes of pea with modified pigment content II. Changes due to magnesium ions concentration, J. Photochem. Photobiol. B: Biology, 83, 11-20.


The video has been created in the frames of the project “Prenylquinones and carotenoids – potential mediators of tolerance of plants to combined light and temperature stress” funded under the BSRP-Bulgarian-Swiss Research Programme, with project leader Prof. Maya Velichkova, DSc.
For download (in Bulgarian, with English subtitles):


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