TL;DRAbstract
SummaryAquatic organisms, including those such as Chlamydomoncas reinhardtii that inhabit the soil water solution, face a variable supply of dissolved inorganic carbon (Ci) for photosynthetic carbon assimilation. Accordingly, C. reinhardtii has the ability to acclimate to the changing (Ci) supply through a variety of responses, which include development of a limiting-CO2-inducible CO2-concentrating mechanism (CCM). The CCM uses active (Ci) transport, probably both at the plasmalemma and the chloroplast envelope, to accumulate a high concentration of bicarbonate in the chloroplast stroma. The initial enzyme of photosynthetic carbon assimilation, Rubisco, is located in, a stromal, structure called the pyrenoid, and one hypothesis, suggests, that dehydration of the accumulated bicarbonate to supply CO2, the substrate for Rubisco, occurs only in the pyrenoid. However, an α-type carbonic anhydrase responsible for dehydration of the stromal bicarbonate pool apparently is located in the thyla
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SummaryAquatic organisms, including those such as Chlamydomoncas reinhardtii that inhabit the soil water solution, face a variable supply of dissolved inorganic carbon (Ci) for photosynthetic carbon assimilation. Accordingly, C. reinhardtii has the ability to acclimate to the changing (Ci) supply through a variety of responses, which include development of a limiting-CO2-inducible CO2-concentrating mechanism (CCM). The CCM uses active (Ci) transport, probably both at the plasmalemma and the chloroplast envelope, to accumulate a high concentration of bicarbonate in the chloroplast stroma. The initial enzyme of photosynthetic carbon assimilation, Rubisco, is located in, a stromal, structure called the pyrenoid, and one hypothesis, suggests, that dehydration of the accumulated bicarbonate to supply CO2, the substrate for Rubisco, occurs only in the pyrenoid. However, an α-type carbonic anhydrase responsible for dehydration of the stromal bicarbonate pool apparently is located in the thyla
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