Affects of Intensity of lights on plants

Plants!

Moderators: honeev, Leonid, amiradm, BioTeam

Post Reply
celticboy1
Garter
Garter
Posts: 7
Joined: Sun Jan 01, 2006 2:17 am

Affects of Intensity of lights on plants

Post by celticboy1 » Sat Jan 21, 2006 8:41 pm

Is there a maxium intensity of light beyond which the rate of photosynthesis will no longer be affected? thanks

User avatar
Navin
Coral
Coral
Posts: 277
Joined: Thu Jun 09, 2005 2:23 pm
Location: Singapore (Asia Pacific)

Post by Navin » Sun Jan 22, 2006 5:11 am

Yes there is. At a certain light intensity, further increases in its quantity will no longer affect the rate of photosynthesis. Light intensity would then no longer be a limiting factor.
Botany is the study of what? Bottoms!

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Sun Jan 22, 2006 10:23 am

Ok, you will need to fill in the measure for light intensity since i don't know how to translate it.
At 500 (something)- photosynthesis becomes obvious because the rate of oxygen production excedes that of oxygen consumption by respiration
At 50.000 - photosynthesis is maximum.
Between 50.000-100.000- photosynthesis is not influenced. This means, that if you increase the intensity from 50.000 to 100.000 it will not matter
Over 100.000 - the rate of photosynthesis drops, light causes cellular lesions
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Sun Jan 22, 2006 10:24 am

As Patrick said, without even googling ;)
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

celticboy1
Garter
Garter
Posts: 7
Joined: Sun Jan 01, 2006 2:17 am

Post by celticboy1 » Sun Jan 22, 2006 1:34 pm

ohh. are you referring to the wattage of the light? I conducted experiments up to a 250 wattflood lamp and that still increased the rate of photosynthesis. What is cellular lesions? Thanks

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Sun Jan 22, 2006 1:52 pm

anything that hurts the cell, like denaturating of enzymes, overincrease in membrane fluidity etc.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

Post Reply

Who is online

Users browsing this forum: No registered users and 0 guests