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What is the limitations of C4 plants?? - (Mar/10/2010 )

We are know C4 plants are able to concentrate CO2, thus allowing RuBisCO to operate at a faster rate than in C3 plants. But since it is of "better design", why donít C4 plants dominate the planet (i.e., what are their molecular and physiological limitations)?

-chemidiot-

This looks eerily similar to a question on a past take home exam for Plant Physiology I.
If it's a homework or study quide question, it's better to post in the homework section where we will help you work through the question.

-Denny-

Hint: think about where C4 plants grow.

-bob1-

Well C4 plants are able to concentrate CO2, thus allowing RuBisCO to operate at a faster rate than in C3 plants. Regarding limits you can find that information soon as possible. Thank you.

-smithgerry-

C4 plants possess biochemical and anatomical mechanisms for increasing carbon dioxide concentration in the intercellular binding site, and it reduces and sometimes eliminates the losses of carbon in photorespiration. C4 plants that live in hot, dry environment, will yield very high water use,
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-shane-

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-liumingzhu-

There is one limitation of c4 plants ie. C4 plants are able to more concentrate CO2 (Carbon Di Oxide ) as compared to C3 plants. And it allows RuBisCO to operate at a faster rate than C3 one.

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-Simron-