Plant respiration

mimobioangel · #1 Oct 12, 2006, 02:21 AM

Under normal conditions, the plant opens its stomata during the day and closes during night (photosynthesis occurs during day time). However, respiration occurs during day and night. How does the plant achieve gaz exchange (O2, and CO2 produced during respiration) if the stomata is closed?

Thank you
Regards,
Maya

bobsplace · Oct 12, 2006, 03:32 AM

The answer you’re looking for may be found in this abstract about Crassulacean acid metabolism (CAM). In a nutshell, 24-hour CAM occurs by phosphoenol pyruvate (PEP) carboxylase fixing over the night to form malic aicd that is stored in plant cell vacuoles. While stomata are tightly closed the following day, malic acid is decarboxylated releasing CO2 for C3 photosynthesis. You may read the entire abstract at http://www.life.uiuc.edu/govindjee/P...ack_Osmond.pdf

invisibleman_productions · Oct 18, 2006, 07:05 AM

The regulation of stomatal conductance

JAVIER RIOS · Oct 24, 2006, 04:26 PM

What Are The Parts Of A Plants

muffin7e · May 30, 2007, 04:24 PM

Quote:

Originally Posted by mimobioangel

Under normal conditions, the plant opens its stomata during the day and closes during night (photosynthesis occurs during day time). However, respiration occurs during day and night. How does the plant achieve gaz exchange (O2, and CO2 produced during respiration) if the stomata is closed?

Thank you
Regards,
Maya

can a plant photosythesis onec cut

marigold · Aug 1, 2007, 06:29 PM

plant respiration

mia8867 · Aug 16, 2007, 04:46 PM

Quote:

Originally Posted by mimobioangel

Under normal conditions, the plant opens its stomata during the day and closes during night (photosynthesis occurs during day time). However, respiration occurs during day and night. How does the plant achieve gaz exchange (O2, and CO2 produced during respiration) if the stomata is closed?

Thank you
Regards,
Maya

by absorbing all nutrients from the soil



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