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Unformatted text preview: involving fixation of atmospheric CO2 and reduction of the fixed carbon into carbohydrate. Rubisco (ru-bis'-ko) Ribulose bisphosphate (RuBP) carboxylase, the enzyme that catalyzes the first step of the Calvin cycle (the addition of CO2 to RuBP). C3 plant A plant that uses the Calvin cycle for the initial steps that incorporate CO2 into organic material, forming a three-carbon compound as the first stable intermediate. C4 plant A plant in which the Calvin cycle is preceded by reactions that incorporate CO2 into a four-carbon compound, the end product of which supplies CO2 for the Calvin cycle. bundle-sheath cell in C4 plants, a type of photosynthetic cell arranged into tightly packed sheaths around the veins of A leaf. CAM plant A plant that uses crassulacean acid metabolism, an adaptation for photosynthesis in arid...
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- Spring '10