Biology 1002B Lecture Notes - Lecture 9: Carbon Fixation, Light-Independent Reactions, P680
8 Feb 2013
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Lecture 9: saturation curve: how to measure carbon fixation in chlamydomonas. How much co2 is actually being incorporate by photosynthesis amount of co2 produced by respiration. Measure the level of co2 concentration due to mitochondria. Identify major parts of a light response curve for carbon fixation. In the dark: photosynthesis is off (behave like animal cell, rate of mitochondrial respiration only (linear, negative co2 fixation since co2 is produced. Room light: linear increase of co2 limit by nadph, atp, light. Rate of calvin cycle is directly proportional to rate of the light reaction: more light = more photosynthesis = more co2, more reductant and atp needed to fix co2. Outside: enzymes in the calvin cycle can"t work any faster (max rate, lots of reductant and atp however rate is limited, rate plateaus (level off) because of turnover rate of enzymes and regeneration of rubp. Light is excess once saturation point is reached: protein attached to p680 breaks down/oxidized.
