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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You can access the commentary directly from this link: https://academic.oup.com/aob/article/125/6/iv/5836583?guestAccessKey=be6e8b51-098d-46b3-9a07-aa1808fad3ef