Talk:Stoma
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I want to know why are stomas opened during the day and why are they closed during the night?? Thank you! Dumbassrina
- Do plant photosynthesis during the day or night? Why would that be relevent? David D. (Talk) 09:32, 1 February 2006 (UTC)
Stomata are not always open day and/or night, this depend on the strategy (program) the plants 'follows'. In most plants they are open during the day for CO2 intake and water release. Water release by transpiration (also) regulates temperature of the leaf/stem (because evaporating fluid extracts heat). Some plants choose to take up CO2 at night, temporarily store it and do the photosynthesis starting from this stored carbon source.
DavidDHaese 14:04, 10 February 2006 (UTC)
[edit] Stomata types and functions in vascular plants
Hi i'm writing an essay for a first year bio class and am having a very hard time finding information about stomata types in vascular plants. I was wondering if anyone could lead me to some good websites, or has some knowledge they are willing to share,
Thanks :)
Is the stomata in the plant cell? Doomsboy 14:04, 10 February 2006 (UTC)
- No, the stoma is the opening formed between two cells. (Stomata is plural.) --EncycloPetey 04:24, 18 August 2007 (UTC)
[edit] Sclerenchyma or Parenchyma?
My intro biology prof told us that the gaurd cells of stomata are sclerenchyma cells, was she incorrect? The article states they're parenchyma cells. —Preceding unsigned comment added by 142.68.216.112 (talk) 01:56, 7 February 2008 (UTC)
- She was incorrect. Mature sclerenchyma cells have no protoplasts (p87, Introduction to Plant Morphology by Eames & McDaniels), and are classified as either sclereids or fibers (p.9, Plant Anatomy, 2nd ed., by Katherine Esau). Guard cells are living and active cells, and must be so in order to function. Thus, they are classified as parenchyma cells. --EncycloPetey (talk) 07:21, 7 February 2008 (UTC)
[edit] Stomata as atmospheric gas proxies
So we all know that Stomata (specifically Stomatal Index) is an indication of the environment that the plant has grown in, telling us the atmospheric gas concentrations as well as several other data. Since Stomata are relatively old traits (I belive they are apparent in the fossil record sometime in the Devonian?) we can use them to be proxies for some environmental conditions. What is currently most popular is the use of Stomatal Index in extant species which are found in relatively the same morphological state in the fossil record, such as Ginkgo, to use in determining ancient atmospheric CO2 levels to use in Global Climate Change studies. —Preceding unsigned comment added by 129.133.198.187 (talk) 01:57, 4 March 2008 (UTC)
