Elevated CO2 induces down-regulation of photosynthesis and alleviates the effect of water deficit in Ceiba pentandra (Malvaceae)
Alexandra Maria Ferreira Silveira,
Ricardo Antonio Marenco
Abstract:The simultaneous effect of elevated CO2 concentration and drought on trees is still under investigation in the Amazon. We evaluated the effect of CO2 levels (400 and 800 ppm) and water regimes (50% and 100% soil field capacity) on photosynthetic traits, chlorophyll fluorescence, and total biomass accumulation in Ceiba pentandra. In well-watered plants, light-saturated photosynthesis (PN-sat) increased in plants exposed to elevated CO2, but both PN-sat and stomatal conductance decreased in response to water def… Show more
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