Fig. 1.
Schematic summarizing some of the key outcomes for CO2 sensing across species (outer circle) and examples of the mechanisms underpinning these effects (inner circle). AC adenylyl cyclase, CA carbonic anhydrase, GC guanylate cyclase, gca growth controlled by abscisic acid, NECs neuroepithelial cells, miR microRNA, NF-kappaB nuclear factor kappa B