Thesis supervisor: Imre Vass
Location of studies (in Hungarian): HAS BRC, Institute of Plant Biology, Szeged Abbreviation of location of studies: SZBK
Description of the research topic:
Light has a double role in photosynthesis. On the one hand it is the primary driving force of
photosynthetic light energy conversion. On the other hand, light is also an important damaging factor
of the photosynthetic apparatus, especially of the so-called Photosystem-II (PSII) complex. On the
basis of previous results reactive oxygen species (ROS) are important mediators of photodamage.
However, the exact role of ROS in light-induced damage of PSII has not yet been clarified. Singlet
oxygen has been shown to be involved on PSII photodamage, however, it is unclear if the damage
effect appears at the level of damaging active PSII centers, at the process of repairing damaged PSII,
or in both processes. Superoxide has also been implied in PSII damage, however, this hypothesis has
not been confirmed yet. The PhD project aims at the clarification of the role of singlet oxygen and
superoxide in PSII damage by using isolated PSII complexes, thylakoid membranes and intact
cyanobacterial cells. The experiments will be performed by using biophysical measurements (variable
Chl fluorescence, and oxygen evolution) in the presence of external singlet oxygen and superoxide
sources. The damaging role of singlet oxygen and superoxide produced inside the PSII complex will
also be studied.
Required language skills: English Further requirements: Basic knowledge about photosyntetic electron transport, cyanobacterial systems, and
expertise in chlorophyll fluorescence and oxygen elvolution measurements.
Number of students who can be accepted: 1
Deadline for application: 2018-02-28
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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