Plants in nature or greenhouses are often exposed to rapidly changing light intensities, which has major impacts on these plants’ photosynthesis rate. The rapidity with which a plant can respond to a change in light intensity is often measured using photosynthetic induction: a plant initially exposed to a low light is suddenly exposed to high light, and its photosynthesis rate is measured, using gas exchange (ga) and/or chlorophyll fluorescence (cf) methods. Most research characterizing the rate of photosynthetic induction uses one specific low and another specific high light intensity (for example, a step change between 0 and 1000 umol m-2 s-1), ignoring the fact that the rate of photosynthetic induction is probably strongly affected by the specific light intensities used.
To obtain a better understanding of the light response of photosynthetic induction and its dependence on genotypic variation, you will measure the dynamics of photosynthesis in a number of relevant genotypes. Work will be conducted using the Li-6800 or Li-6400 photosynthesis system. This work could be a very important stepping stone for modelling and phenotyping efforts on crop growth in the field.
- Gas exchange measurements
- Chlorophyll fluorescence
- Data analysis
Interested in doing a BSc or MSc thesis at HPP? Please contact the HPP student coordinator Katharina Hanika.