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Question: photosynthesis light reactions: antenna and reaction center pigments
I am reading an intro plant phys text. I am looking at a graph that
has O2 produced per flash of light as a positive decreasing function of light intensity. The book claims that the asymptote in this function, called the maximum yield, is a result of the separation of the light-harvesting system into a reaction center with antenna complex pigments, which keep the reaction center enzymes saturated with activity, so that they do not sit idle. What is the advantage to the plant of this saturation? I can imagine that it could be advantageous if the saturation point is near the intensity of daylight (is it?). If this is true, then it would seem that plants that lived under low intensity light conditions would have higher saturation points. Do they? Thanks to anyone that can help. |
#2
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Question: photosynthesis light reactions: antenna and reaction center pigments
frankgrimes12 schreef
I am reading an intro plant phys text. I am looking at a graph that has O2 produced per flash of light as a positive decreasing function of light intensity. The book claims that the asymptote in this function, called the maximum yield, is a result of the separation of the light-harvesting system into a reaction center with antenna complex pigments, which keep the reaction center enzymes saturated with activity, so that they do not sit idle. What is the advantage to the plant of this saturation? I can imagine that it could be advantageous if the saturation point is near the intensity of daylight (is it?). If this is true, then it would seem that plants that lived under low intensity light conditions would have higher saturation points. Do they? Thanks to anyone that can help. + + + Seems like the Law of the Minimum applies here. A naked eye observation is that "plants that live under low intensity light conditions" have a higher number of "reaction centers with antenna complex pigments". PvR |
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