A research team from multiple universities is studying how plants adapt their photosynthesis to changing light and has discovered a key molecular mechanism that synchronizes the processes involved.
Light supplies the energy plants need to build up biomass. A research team is researching how plants adapt their photosynthesis to changing light. They describe a key molecular mechanism that synchronizes the processes involved.
The research group headed by Professor Dr Ute Armbruster from the Institute of Molecular Photosynthesis at HHU is examining this process from a range of perspectives. Together with an interdisciplinary research team, the group now presents its findings on the processes involved in plant reactions to different light conditions in a current publication in.
If it is too bright, the plant cannot convert all the light energy; this is a potentially harmful situation. To ensure that no damage is caused by the excess light energy -- which can result in the formation of e.g. highly reactive oxygen species -- the plant activates a protective mechanism: The so-called energy-dependent quenching ensures that excess energy is discharged in the form of heat.
Firstly, the pH value of the medium surrounding the thylakoid membrane reacts highly dynamically to light changes. Secondly, the structure and thus the activity of KEA3 changes according to the pH value. However, this only occurs when KEA3 has also bound ATP and NADPH. In excess light, this leads to KEA3 being inactivated, thus allowing qE to be active. After a sudden transition to shade, KEA3 becomes activated, which upregulates the light-driven reactions of photosynthesis.
Research Plants Photosynthesis Molecular Mechanism Light Biomass Adaptation Process Optimization Food Production Stress Tolerance
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