As the key enzyme responsible for inorganic carbon uptake in most photosynthetic organisms, Rubisco exhibits poor catalytic activity and reacts promiscuously with oxygen, limiting the rate of photosynthesis. To offset this limitation, many photosynthetic organisms have evolved carbon-concentrating mechanisms (CCMs) that saturate CO2 near Rubisco, maintaining enzyme function and suppressing oxygenation.
Chloroplasts can sense environmental fluctuations via Ca2+ signaling. Environmental triggers, such as light changes, physical damage and heat waves, can induce distinct Ca2+ signatures in chloroplasts, which may help rebalance photosynthesis and stress responses under fluctuating conditions.
Most knowledge regarding the temperature responses of photosynthesis are based on experimental warming in controlled environments, usually on seedling.
This presentation will explore the application of precision gene editing technologies for trait enhancement in grain crops, with a focus on the integrated platform capabilities developed at Agriculture Victoria (AgVic).
Plants assimilate CO2 through photosynthesis, converting it into carbohydrates that sustain growth, development and maintenance. However, a substantial portion of this fixed carbon is returned to the atmosphere via respiration, with terrestrial plants releasing 60-80 Gt C y⁻¹—a flux five times greater than annual anthropogenic CO2 emissions.
Factors controlling plant photosynthesis and primary production include parameters dictating photosynthetic activity together with export and allocation properties.