Poul has more than 20 years of research experience with photosynthesis, in particular photosystem I, chlorophyll biosynthesis and chloroplast biology (view more). Over the years his laboratory has elucidated the function of several subunits of the photosystem I complex, characterized enzymes in the chlorophyll biosynthesis and gained expertise in handling and characterizing photosynthetic membrane protein-pigment complexes. In recent years, his focus has been on synthetic biology, metabolic engineering and reconstituting biosynthetic pathways in photosynthetic organisms. Specifically his group have combined cytochrome P450 dependent biosynthetic pathways and photosystems in both chloroplasts of higher plants and cyanobacteria to achieve redirection of photosynthetic electrons towards new pathways. In these projects, the pathways use light-dependent reducing power generated by photosystem I directly. They have successfully inserted multiple genes in operons and expressed them in cyanobacteria and higher plant chloroplasts. Since 2016 he has headed the Copenhagen Plant Science Centre (CPSC, cpsc.ku.dk).