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C3 and C4 plants

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Postby MrMistery » Thu May 15, 2008 6:34 am

tittu, that's one of the practice questions on the IBO website, if i remember correctly. A C4 plant can undergo photosynthesis at lower concentrations of CO2 than the C3 plant. Therefore, the CO2 will keep decreasing after the inferior limit of the C3 plant, until it reaches the C4 inferior limit. B
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Re: C3 and C4 plants

Postby angelyn1985 » Thu Jun 12, 2008 2:36 pm

Just a question, are maize and soybean both C4 plants??
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Postby MrMistery » Thu Jun 12, 2008 5:13 pm

maize yes. As for soybean, i don't know
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Postby Cat » Thu Jun 12, 2008 6:24 pm

Soybean is C3.
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Postby Cristgonz » Mon Jun 23, 2008 3:49 pm

simplyfied is that C4 (weeds) are more effective on the production of drymatter than C3 (plants except cactaceae and another ones) and C3 makes the normal photosynthesis cicle (krebs)-C4 do it easier.
you'll never see a C3 Plant growing up on the pavement but you can see some annual or perennial grasses everywhere (i have seen them on some celigins here in my country haha)
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Re: C3 and C4 plants

Postby Cristgonz » Mon Jun 23, 2008 3:50 pm

angelyn1985 wrote:Just a question, are maize and soybean both C4 plants??

corn = C4
soybean = C3
that's why corn need less water to make more dry matter.
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Re:

Postby MrMistery » Mon Jun 23, 2008 6:00 pm

Cristgonz wrote:[...] C3 makes the normal photosynthesis cicle (krebs)-C4 do it easier.[...]

Calvin-Bensen!
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Re: Re:

Postby Cristgonz » Wed Jun 25, 2008 3:25 am

MrMistery wrote:
Cristgonz wrote:[...] C3 makes the normal photosynthesis cicle (krebs)-C4 do it easier.[...]

Calvin-Bensen!

haha thanks
sorry!! i'm just a little bit oxidized ! i did it in my first year of my career hehe.
:)!!
but i guess u got my idea xD
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Postby alextemplet » Mon Jun 30, 2008 6:11 pm

Aren't C3 plants mostly monocots and C4 plants mostly eudicots?
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Postby MrMistery » Mon Jun 30, 2008 7:55 pm

No.
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Re: C3 and C4 plants

Postby danni1708 » Thu Oct 30, 2008 1:05 am

can someone either confirm or tell me im completely wrong..
do c3 plants undergo photosynthesis during the day using sunlight etc..
whilst c4 plants undergo photosynthesis at night? using some other method..
am i on the right track here or thinking of something completely different??
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Re: C3 and C4 plants

Postby MichaelXY » Thu Oct 30, 2008 5:14 am

danni1708 wrote:can someone either confirm or tell me im completely wrong..
do c3 plants undergo photosynthesis during the day using sunlight etc..
whilst c4 plants undergo photosynthesis at night? using some other method..
am i on the right track here or thinking of something completely different??


Photosynthesis can not happen without light, hence the name. So no, C4 does not undergo photosynthesis at night. I suspect you are thinking of CAM plants which open their stomata at night to transpire, and close the stomata during the day.
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