Photosynthetic acclimation
A change in photosynthetic capacity after sustained growing conditions, such as a partial reduction in the initial response to elevated carbon dioxide.
Photosynthetic acclimation is a longer-term adjustment of leaves and whole plants to their growth environment. It is distinct from the immediate change measured when light, carbon dioxide, or temperature changes for a few minutes.
Under sustained elevated carbon dioxide, some C3 plants C3 photosynthesis The photosynthetic pathway used by cannabis and most plant species, named for the three-carbon compound formed when carbon dioxide first enters the Calvin cycle. reduce Rubisco content or activity and alter leaf nitrogen, carbohydrate storage, or source-sink balance. Photosynthesis can remain above the ambient treatment while the initial difference between treatments becomes smaller.
The direction and size of acclimation depend on species, cultivar, nutrients, water, temperature, developmental stage, and sink demand. Cannabis-specific responses across commercial production conditions remain incompletely characterized.