Talk:Water potential
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Water potential is within the scope of WikiProject Plants, an attempt to better organize information in articles related to plants and botany. For more information, visit the project page. |
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| Mid | This article has been rated as mid-importance on the importance scale. |
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Article Grading: The following comments were left by the quality and importance raters: (edit · refresh)
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This article is within the scope of WikiProject Physics, which collaborates on articles related to physics. |
| Start | This article has been rated as start-Class on the assessment scale. |
| Low | This article is on a subject of low importance within physics. |
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[edit] Improving
Article is getting better, but it still needs some editting and references added. Will try to help more if I have time.
This is a very important topic for plant physiology and soil science, but I'm not sure how important it is for physics as a whole, so I rated it "mid".
cheers, Wcornwell 13:20, 14 April 2007 (UTC)
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- Hey is it really Physics??? Yep there's this "potential", but really, it contains "Osmotic"... And who would care about this other than Plant or Soil researchers? 165.132.24.81 02:27, 4 May 2007 (UTC)
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- I agree it's not a "basic" physic concept like gravitation, so I'll change it to "low" importance for physics and "mid" for plants. It's really hard to understand why water flows from the ground to the tops of trees without understanding water potential. Wcornwell 17:32, 4 May 2007 (UTC)
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[edit] yeah water potential!
Water potential totally rules! yeah!
- Yeah man, woohoo!!! Think outside the box 13:12, 5 May 2007 (UTC)
[edit] Negative and positive potential
Please be aware that it is perfectly legitimate for the water potential to be positive or negative.
While most biology books are rediculously simplistic in their coverage of water potential, if you edit this article, you should be aware of this at least.
[I'd suggest avoiding edits until you are familiar at least the ramifications of the simple relationship between water potential, pressure potential and osmotic potential.]
[edit] Complex Systems
The section on Complex Systems (those whose gravimetric and matrix effects) still really applicable to soil potential and intra-plant water potential; it should be expanded. [Even though it's more advanced than most undergrad level courses on plant biology would probably get to.]
Please don't just delete it, make it better.Dondelelcaro —Preceding signed but undated comment was added at 05:20, 24 September 2007 (UTC)
Agreed. I added a section on matrix potential, but still missing gravity and humidity...Wcornwell 00:46, 16 November 2007 (UTC)
[edit] AfD result
Hi i'm an extremely confused biology As Level student. My teacher said it was impossible for water potential to be posotive. She then said quoted the equation Ψ = Ψp + Ψs (pressure potential and solute potential). She gave an example where Ψs was posotive and Ψp was 0. She said that the overall Ψw was Zero. I asked how is that possible surely abiding by basic laws of mathematics the Ψw should be posotive. She then said she'd ask another teacher and come back to me.
HELP!
Usually Ψs is negative, and Ψp is positive. 165.132.24.81 02:24, 4 May 2007 (UTC)
[edit] Disagreement with above editor
Water potential does not "rule." It is tasteless and without merit.
- I have to disagree with you here. Water does "rule" because without it you'd be dead. Think outside the box
[edit] Comment about 'free energy'
Is that real information, or is it graffiti?
- Free energy is a real concept. It's basically the energy in a system that is available to do work. --Luigifan 12:49, 28 October 2007 (UTC)
[edit] Nominate for Stub status
This article is very short, and contains very little information. I believe it should be labeled a stub until it can be expanded. -- Tuvok^Talk|Desk|Contribs 02:28, 13 October 2006 (UTC)
- Yes, i agree, and a clean-up is needed in the explaining. Currently its extreamly hard to understand unless you have previous knowledge of the subject. Think outside the box 13:01, 13 October 2006 (UTC)
[edit] Precisely what effect does temperature have on water potential?
Okay, I get how pressure and solute concentrations affect water potential, as the article explained that quite clearly. However, I'm not sure what temperature does to the water potential. For a specific case, think of a cell with an internal concentration of 0.02 molar glucose that is placed in a test tube containing a 0.02 molar glucose solution. Assuming that no active transport of glucose occurs into or out of the cell, and there is no pressure difference, the two solutions should be isotonic to each other. However, I'm not sure if the temperature could cause the cell's internal concentration to actually be hypertonic to the solution in the test tube. Will the cell and test tube be isotonic to each other under these conditions no matter what, or could they be isotonic or hypertonic to each other based upon the temperature? I need to know this for a science assignment, so please reply quickly! --Luigifan 12:47, 28 October 2007 (UTC)
