Dr Douglas Orr

Research Overview

My work is mostly related to the biochemistry of photosynthesis and approaches to improving photosynthetic efficiency through engineering and/or identifying natural variation to incorporate into breeding programs. Much of this work centres on the central enzyme of photosynthesis, Rubisco (Ribulose 1,5-bisphosphate carboxylase/oxygenase). As the gatekeeper of carbon entry into the biosphere, Rubisco serves the critical role of assimilating carbon from atmospheric CO₂ for the plant to use in growth. However, Rubisco has undesirable characteristics which make it a major rate-limiter of photosynthesis, particularly in crop plants. Currently my photosynthesis research is focused on two main areas: we are collaborating with colleagues to investigate the incorporation of cyanobacterial carbon concentrating mechanisms into higher plants as a means to overcome some of Rubiscos shortcomings and boost plant productivity; and as part of RIPE: Realizing Increased Photosynthetic Efficiency, we are investigating Rubisco diversity and it's regulation during rapid changes in conditions.I am also working with colleagues on a numebr of other ideas around plant engineering for diverse purposes.