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I was wondering if anybody could help me on my bio planning exercise where i am comparing transpiration and light intensity. I need some theories on what will happen etc and some sound scientific knowledge. Thankyou
Light is one of the major factors influencing the rate of transpiration because of its controlling effect on the opening and closing of stomates. Light of low intensity is, generally speaking, less effective than stronger light in inducing stomatal opening. Hence stomates often do not open as wide on cloudy as on clear days, and often do not remain open for as much of the daylight period
For the mechanism to get started, a proton pump in the membrane needs to get activated by blue light. Later in the stomata opening mechanism red light is necessary in order to turn starch into malate and keep the stomata open.
"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
O.o really? I thought it was the other way around.
The Stomates tend to open more on cloudy / rainy / humid / anything that has got to do with water or moisture days, because it has a good quantity of water for it to be replaced inside the plant.
Whilst on Sunny, dry, windy, hot days, the stomates open less, because it does not want to lose all the water inside it. These hot conditions will cause the plant to lose alot of water, so the stomates tend to open less to trap the water inside it. I think
Sorry for my unknowledgable'ness (is that a word? ), but can i make sure, because i dont understand very well of this light process
For the mechanism to get started --> The stomates?
are Blue and Red light are most effectively used by plants?
And i thought all you need was the guardcells to be turgid so the stomata opens Guess i am still in the newbie level of biology By the way, how does malate (or what is it) allow the stomata to open? does it have somethign to do with teh guard cells?
And do i use alot of emoticons in my reply ?
... If you think about it.
arent them the same thing?
7 posts • Page 1 of 1
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