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    mimobioangel's Avatar
    mimobioangel Posts: 1, Reputation: 1
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    #1

    Oct 12, 2006, 03:21 AM
    Plant respiration
    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's Avatar
    bobsplace Posts: 7, Reputation: 2
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    #2

    Oct 12, 2006, 04:32 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's Avatar
    invisibleman_productions Posts: 207, Reputation: 12
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    #3

    Oct 18, 2006, 08:05 AM
    The regulation of stomatal conductance
    JAVIER RIOS's Avatar
    JAVIER RIOS Posts: 1, Reputation: 1
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    #4

    Oct 24, 2006, 05:26 PM
    What Are The Parts Of A Plants
    muffin7e's Avatar
    muffin7e Posts: 2, Reputation: 1
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    #5

    May 30, 2007, 05:24 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's Avatar
    marigold Posts: 1, Reputation: 1
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    #6

    Aug 1, 2007, 07:29 PM
    Plant respiration
    mia8867's Avatar
    mia8867 Posts: 4, Reputation: 1
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    #7

    Aug 16, 2007, 05:46 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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