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Go Back   Orchid Board - Most Complete Orchid Forum on the web ! > STYLES, SETUPS & ENCLOSURES > Growing Under Lights
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  #21 (permalink)  
Old 03-27-2008, 11:18 AM
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Originally Posted by Daemos View Post
Now remember that these CFL's are greatly underestimated. They CAN burn you plants to dust and they do make your skin look brown if you stand close to them for long periods in a day. I just love it. I really feel like being a god controlling the light
Good one! Seriously, be careful with distance and move plants closer a week at a time. I had to move my Encyclia tampensis back because leaves were turning red. Only took a week for that to happen. Next stage would be black spots.
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I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)
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  #22 (permalink)  
Old 03-27-2008, 02:05 PM
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m_ms09, this statement is somewhat wrong. It is correct that the P680, the central part in photosystem II (PS II) has the absorbing maximum at 680 nm BUT it is not the primary absorber in plants. Attached to photosystem II is an antenna system that collect the sunlight and direct the energy (not light) to the chlorofyll (P680) in PS II.
It is this antenna system that is interesting in a light discussion not the central part of PSII. Unfortunate, this is very often omitted outside the scientific community

The same is valid for photosystem I, it also has an antenna system that collects the light.

/Magnus

Unfortunately we never went into that much detail way back when I learned about photosystems, but it's refreshing that you know so much!!

Thanks for taking the time to explain all of that!
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Old 03-27-2008, 02:33 PM
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m_ms09, you seldom do go deep in photosystem II!

I myself is working in the academia on how to mimic the photosystem II to build a artificial system for converting the light energy to a chemical energy carrier. I am "living" with these little details daily so I have a hard time to just ignore this kind of simplified descriptions that floats around.

For you that like to know there are very few organism were Photosystem I and II are studied, and I should say that one of the most well studied is spinach! More or less everything we knows on a molecular level comes from either spinach or some strain of cyanobacteria!


Sorry for this I could not resist the opertunity....
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Old 03-27-2008, 02:35 PM
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...and #4. Don't use a traffic light!
hahahaha
Yes, I've been hearing that that's a bad idea
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Old 03-27-2008, 02:45 PM
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m_ms09, you seldom do go deep in photosystem II!

I myself is working in the academia on how to mimic the photosystem II to build a artificial system for converting the light energy to a chemical energy carrier. I am "living" with these little details daily so I have a hard time to just ignore this kind of simplified descriptions that floats around.

For you that like to know there are very few organism were Photosystem I and II are studied, and I should say that one of the most well studied is spinach! More or less everything we knows on a molecular level comes from either spinach or some strain of cyanobacteria!


Sorry for this I could not resist the opertunity....
No need to apologize! Photosystems are not my forte! I am a third year molecular biology and genetics major though, and I spend a lot of time working in a cellular biology lab. We're studying programmed cell death in tomotoes! So I could go on and on in that respect...haha

I like the prospects of your research! Very cool
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