Date: Mon, 21 Jul 1997 16:19:02 GMT From: jaldr@onramp.net (James Aldridge) To: cp@opus.hpl.hp.com Message-Id: <aabcdefg2725$foo@default> Subject: Re: Transpiration, oxygen...
>> I believe that all plants do better with some "darkness", since that =
is
>> what they experience naturally. Not only does it give the plant a =
resting
>> period, but also their respiration reverses at night, producing oxygen
>> rather than carbon dioxide.=20
>
>Ooops. I thought that plants transpire oxygen during the _day_ when
>they get light, and then at night they transpire carbon dioxide.
Plants produce their food by photosynthesis (using water and CO2 and =
producing
O2) and burn that food to provide energy for cellular processes (using =
oxygen
and producing CO2).=20
These two processes both occur with light present (since the plant must =
continue
to live and be active even though it is producing more food for itself).=20
Without light, cellular respiration is the process which occurs.
Jim
James Aldridge, Ph.D. - jaldr@onramp.net OR aldrjame@tenet.edu
=46ort Worth Country Day School
=46ort Worth, TX USA
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