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production of different sized cells in monocots/dicots

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production of different sized cells in monocots/dicots

Postby amanda713a » Mon Oct 15, 2007 3:31 pm

I cant figure out the answer to this question:
How do you account for the seasonal production of different sized cells?
This is referring to monocot and dicot stems I think.

PLEASE REPLY WITH THE ANSWER A.S.A.P!
I'D REAALLLLY APPRECIATE IT.
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Postby mith » Mon Oct 15, 2007 4:03 pm

water availability
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
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Postby utexas1215 » Wed Oct 17, 2007 3:23 pm

well, i would agree that w/ different seasons comes different fluctuations in water supply. And you'd be more likely to find flacid plant cells in absence of water and turgid plant cells in presence of water, but many environments have a fairly steady rate of rainfall year round.

But also, keep in mind that fact that with change in seasons come change in temperatures. I just did some research that pertains to this matter my botany genetics prof., and we found that plant cells change in size and produce different types of proteins when they acclimate to cold weather conditions in their environment. Genes, like RAV and ZAT are present in plants at different temperatures. These genes, when expressed to become proteins via regulation of gene expression, allows the plant to know its about to be exposed to cold conditions, which will then intern, allow the cell to start transcribing and translating genes --> proteins that will allow the cell wall to be more stable by adding and renewing more carbohydrates like pectin, cellulose, and hemicellulose which makes the cell bigger and more stable.
Hope this helps![/i]
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