Summary
Clusia rosea Jacq. is a hemiepiphyte having Crassulacean Acid Metabolism (CAM). In its natural habitat Clusia begins its life cycle as an epiphyte and eventually becomes a rooted tree. These two stages of the life cycle of Clusia represent markedly different water regimes. Our CO2 exchange, stomatal conductance, titratable acidity, and stable carbon isotope ratio measurements indicate that Clusia has a flexible photosynthetic mode, where CO2 is fixed mostly via CAM during its epiphytic stage, when water availability is low, and via both CAM and C3 during its rooted stage.
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Sternberg, L.d.S.L., Ting, I.P., Price, D. et al. Photosynthesis in epiphytic and rooted Clusia rosea Jacq.. Oecologia 72, 457–460 (1987). https://doi.org/10.1007/BF00377579
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DOI: https://doi.org/10.1007/BF00377579