Commentary in Annals of Botany

Commentary in Annals of Botany

During daytime, CO2 is depleted and O2 accumulates within dense stands of submerged aquatic plants. CO2 -concentrating mechanisms (CCMs) such as C4 photosynthesis, CAM or HCO3 -use are thus present in many species of aquatic plants and the paper by Han et al. (2020) shows an exciting example from − Ottelia alismoides in which all three CCMs operate in the same tissues.

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