Plants and oxygen--help!
Kirk Newman
I always thought plants used carbondioxide
and released oxygen. Recently, I was told
they also use oxygen. If the statement is true,
what do they use oxygen for?
kirk.
Kitty
In photosynthesis, carbon dioxide is taked from the air by the leaves and
combined with water absorbed by the roots to form organic molecules.
Then, the products of photosynthesis, glucose and oxygen, are combined and
the oxygen is used to oxidize the glucose in the plant's respiration back
into water and carbon dioxide with energy released. This energy is then
used to synthesize and maintain stuff in the plant.
Hope this helps. =Ş
Kirk Newman wrote in message <6cvhdr$d5...@theusc.csd.sc.edu>...
tsir
Plants consume carbon dioxide and produce oxygen during the day
(photosynthesis process)
while consume oxygen and produce carbon dioxide mainly during the night
(respiration process)!!
I hope this help.
Costas
-------------------------------------------------------------
Søren Laurentius Nielsen
On Tue, 24 Feb 1998 22:29:08 GMT, jah...@yahoo.com (Kirk Newman)
wrote:
>I always thought plants used carbondioxide
>and released oxygen. Recently, I was told
>they also use oxygen. If the statement is true,
>what do they use oxygen for?
>kirk.
>
Kirk: Plants have respiration just like animals. During the day
photosynthesis will usually exceed respiration, resulting in a net
oxygen release, but during the night, plants will only have
respiration, not photosynthesis, leading to a net oxygen uptake.
Ross Koning
At 5:29 PM -0500 2/24/98, Kirk Newman wrote:
>I always thought plants used carbondioxide
>and released oxygen. Recently, I was told
>they also use oxygen. If the statement is true,
>what do they use oxygen for?
>kirk.
Kirk,
A common misconception is that plants do ONLY
photosynthesis. Plant cells also contain
mitochondria and carry out cellular respiration
just as animals do. If you think about it,
roots are generally NOT in light and the inner
tissues of a tree (under the bark) or a fruit
(under an opaque skin) must use respiration
rather than photosynthesis to survive. Also
plants need energy at night too...respiration
does this.
In energy production terms, plants are MORE complex
than animals.
Plants also carry out photorespiration (a process
using oxygen and releasing carbon dioxide, but
not generating energy). C-3 plants do more of
this than C-4 or CAM plants. So there is another
use for oxygen.
ross
________________________________________________________________
Ross Koning | kon...@ecsu.ctstateu.edu
Biology Department | http://koning.ecsu.ctstateu.edu/
Eastern CT State University | phone: 860-465-5327
Willimantic, CT 06226 USA | fax: 860-465-4479
____________________________|___________________________________
Electronic services composed and served from =95Macintosh hardware.
Leif Johansen
tsir wrote in message <6d0gnt$aeb$1...@medousa.forthnet.gr>...
klip
>while consume oxygen and produce carbon dioxide mainly during the night
>(respiration process)!!
klip
And therefore You should never have plants in Your Bedroom
Leif
>Kirk Newman wrote in message <6cvhdr$d5...@theusc.csd.sc.edu>...
Carsten Richter
Leif Johansen wrote:
> And therefore You should never have plants in Your Bedroom
>
> Leif
>
The same amount of oxygen is used by 40 kg plant fresh-matter. That
would be 40 plants of 1 kg (a little jungle in a bedroom).
If a bedroom of 40 cubic meter would be hermetically closed, the oxygen
concentration would drop in 8 hours from 20.9% to 20.7%. In terms of
breathing this is nearly nothing.
I think if one has some plants in a normally ventilated bedroom, there
are no problems concerning the oxygen concentration.
(If someone cares about oxygen, it would be more helpful to sleep
without a woman (or a man) than to sleep without plants;-))
Bye
Carsten
tsir
>(If someone cares about oxygen, it would be more helpful to sleep
>without a woman (or a man) than to sleep without plants;-))
>
>Bye
>Carsten
----------------------------------------
Good !!!
; )
Costas