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Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT ( talk) 17:03, 16 January 2022 (UTC)
A note about turgidity, flaccidity and overinflation within a cell wall? 66.75.246.149 04:17, 22 September 2005 (UTC)
a cell wall is fully permeable
<<most protists do have cell walls; only amoeba etc. don't.>>
does a cell wall protect a cell? —Preceding
unsigned comment added by
98.19.249.25 (
talk)
22:06, 29 September 2010 (UTC)
...with the image link? Clicking on this link starts the file upload dialogue. Is this a temporary thing? -- RunningFree 21:28, 25 October 2005 (UTC)
It works fine now. Supergrunch 18:15, 7 March 2006 (UTC)
...don't have cell walls. Perhaps the enumeration of organisms should read "most bacteria". Cf.: http://en.wikipedia.org/wiki/Mycoplasma —Preceding unsigned comment added by 75.30.181.95 ( talk) 08:09, 6 December 2009 (UTC)
I am wondering whether maybe this paragraph needs some further adjustment. As far as I understood, fungal cell walls are composed of (from inside out):
Most of the glucosamine units found in the cell walls are in fact the subunits of chitin, since chitin is a cellulose-like polymer consisting mainly of unbranched chains of N-acetyl-D-glucosamine. Chitin = Polymeric N-acetyl-D-glucosamine
references:
"The polyglucose beta-1,3-D-glucan is a major structural component of the cell wall of yeasts and fungi."
"The fungal kingdom is very diverse, with species growing as unicellular yeasts and/or branching hyphae that produce a remarkable array of spores and other reproductive structures. In each case, the shape and integrity of the fungus is dependent upon the mechanical strength of the cell wall, which performs a wide range of essential roles during the interaction of the fungus with its environment (Gooday, 1995Down). The fungal wall is a complex structure composed typically of chitin, 1,3-{beta}- and 1,6-{beta}-glucan, mannan and proteins, although wall composition frequently varies markedly between species of fungi. For diagrammatic representations of part or all of the cell wall of yeasts or filamentous fungi see recent reviews by Bernard & Latgé (2001)Down, McFadden & Casadevall (2001)Down, Smits et al. (2001)Down and Odds et al. (2003)"
"The cell wall of Saccharomyces cerevisiae represents some 30% of the total weight of the cell and is made up of beta-glucans, mannose-containing glycoproteins (mannoproteins), and small amounts of chitin. The mannoproteins can be divided into three groups according to the linkages that bind them to the structure of the cell wall: (i) noncovalently bound, (ii) covalently bound to the structural glucan, and (iii) disulfide bound to other proteins that are themselves covalently bound to the structural glucan of the cell wall."
--
Spitfire ch
11:37, 23 April 2007 (UTC)
http://www.biologie.uni-hamburg.de/b-online/e33/33.htm says that "Constitute oomycetes a missing link or a group that cannot be counted among fungi at all? Oomycetes contain - in contrast to all other fungi – cell walls out of cellulose, their zoospores have two heterokont flagellae, and their thallus resembles that of some siphonal algae (Vaucheria, for example)." (Boldface added by me)and "Both plant and fungal cells are enclosed by a cell wall while animal cells have no such characteristic. This is true, and cell walls exist in prokaryotes (bacteria, blue-green algae), too. The walls of all three mentioned kingdoms have, nevertheless, different molecular compositions (they contain different molecular classes), their biosynthetic pathways and the way of their cellular growths are different. They are therefore not homologous.".
Summary: Fungi DO NOT have cellulose walls. There are "fungi" with cellulose cell walls, but they are not actually fungi. Therefore, I'm going to try to change the paragraph... 169.229.121.94 00:37, 8 December 2006 (UTC)
the word algae represents a large group of dfferent organisms from different phylogentic group. The green algae are thee large group of algae from which the embroyophytes(higher plants) emerged —Preceding unsigned comment added by 91.111.146.214 ( talk) 11:54, 29 October 2008 (UTC)
Is the cell wall fully permeable?Rabidretardedolphinz 14:20, 23 December 2011 (UTC)awesome kid — Preceding unsigned comment added by DXproton ( talk • contribs)
The section on "Composition" states: "For example, endosperm cell walls in the seeds of cereal grasses, nasturtium, and other species, are rich in glucans and other polysaccharides."
Which kind of "nasturtium" is meant here? Is this Nasturtium (genus) or the plant commonly called "nasturium" that is actually in the genus Tropaeolum? -- EncycloPetey ( talk) 07:37, 30 September 2016 (UTC)
Overall, the plant cell wall section was very informational. However, there are a few edits I think would help enhance the article.
The links at the beginning of the "Composition" section are helpful, but a brief explanation of the relationship between each carbohydrate should be included. For example, why are all three needed? What are the weaknesses and benefits of each one that contribute to the structure and function of the cell wall?
The information on structural proteins is sufficient as a brief overview, but the reason why they are more prominent in specialized cells and in cell corners should be included.
In the “Formation” section, the theory of each model should be summarized.
There are very few citations throughout this section, especially under the “Composition” heading. Specifically, the place where the information of major polymers of wood was obtained should be cited.
Thank you! - Jedi Hannah ( talk) 01:15, 1 October 2016 (UTC)
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Cell walls are present in most prokaryotes (except mollicute bacteria), in algae, fungi and eukaryotes including plants
The wording is a bit confusing here in that both algae and fungi are as much eukariotes as plants are. — Preceding unsigned comment added by 93.237.65.234 ( talk) 15:50, 2 July 2020 (UTC)
Disscussion on cell 2409:4064:2C83:4B2D:34AA:C63A:D767:E2A7 ( talk) 05:50, 3 February 2022 (UTC)
Hammad Khalid 103.174.206.94 ( talk) 09:38, 6 May 2023 (UTC)
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edit request has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
Please change "The gycopeptide antibiotics" to "The glycopeptide antibiotics" Similing Joker ( talk) 10:20, 1 January 2024 (UTC)
![]() | This ![]() It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||
|
![]() | This article was the
MCB Collaboration of the Month for the month of October 2007. For more details, see the
MCB Collaboration of the Month history. |
This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available
on the course page. Peer reviewers:
Melissamg96.
Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT ( talk) 18:47, 17 January 2022 (UTC)
This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available
on the course page. Student editor(s):
Kyellen94,
Jedi Hannah. Peer reviewers:
Kyellen94.
Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT ( talk) 17:03, 16 January 2022 (UTC)
A note about turgidity, flaccidity and overinflation within a cell wall? 66.75.246.149 04:17, 22 September 2005 (UTC)
a cell wall is fully permeable
<<most protists do have cell walls; only amoeba etc. don't.>>
does a cell wall protect a cell? —Preceding
unsigned comment added by
98.19.249.25 (
talk)
22:06, 29 September 2010 (UTC)
...with the image link? Clicking on this link starts the file upload dialogue. Is this a temporary thing? -- RunningFree 21:28, 25 October 2005 (UTC)
It works fine now. Supergrunch 18:15, 7 March 2006 (UTC)
...don't have cell walls. Perhaps the enumeration of organisms should read "most bacteria". Cf.: http://en.wikipedia.org/wiki/Mycoplasma —Preceding unsigned comment added by 75.30.181.95 ( talk) 08:09, 6 December 2009 (UTC)
I am wondering whether maybe this paragraph needs some further adjustment. As far as I understood, fungal cell walls are composed of (from inside out):
Most of the glucosamine units found in the cell walls are in fact the subunits of chitin, since chitin is a cellulose-like polymer consisting mainly of unbranched chains of N-acetyl-D-glucosamine. Chitin = Polymeric N-acetyl-D-glucosamine
references:
"The polyglucose beta-1,3-D-glucan is a major structural component of the cell wall of yeasts and fungi."
"The fungal kingdom is very diverse, with species growing as unicellular yeasts and/or branching hyphae that produce a remarkable array of spores and other reproductive structures. In each case, the shape and integrity of the fungus is dependent upon the mechanical strength of the cell wall, which performs a wide range of essential roles during the interaction of the fungus with its environment (Gooday, 1995Down). The fungal wall is a complex structure composed typically of chitin, 1,3-{beta}- and 1,6-{beta}-glucan, mannan and proteins, although wall composition frequently varies markedly between species of fungi. For diagrammatic representations of part or all of the cell wall of yeasts or filamentous fungi see recent reviews by Bernard & Latgé (2001)Down, McFadden & Casadevall (2001)Down, Smits et al. (2001)Down and Odds et al. (2003)"
"The cell wall of Saccharomyces cerevisiae represents some 30% of the total weight of the cell and is made up of beta-glucans, mannose-containing glycoproteins (mannoproteins), and small amounts of chitin. The mannoproteins can be divided into three groups according to the linkages that bind them to the structure of the cell wall: (i) noncovalently bound, (ii) covalently bound to the structural glucan, and (iii) disulfide bound to other proteins that are themselves covalently bound to the structural glucan of the cell wall."
--
Spitfire ch
11:37, 23 April 2007 (UTC)
http://www.biologie.uni-hamburg.de/b-online/e33/33.htm says that "Constitute oomycetes a missing link or a group that cannot be counted among fungi at all? Oomycetes contain - in contrast to all other fungi – cell walls out of cellulose, their zoospores have two heterokont flagellae, and their thallus resembles that of some siphonal algae (Vaucheria, for example)." (Boldface added by me)and "Both plant and fungal cells are enclosed by a cell wall while animal cells have no such characteristic. This is true, and cell walls exist in prokaryotes (bacteria, blue-green algae), too. The walls of all three mentioned kingdoms have, nevertheless, different molecular compositions (they contain different molecular classes), their biosynthetic pathways and the way of their cellular growths are different. They are therefore not homologous.".
Summary: Fungi DO NOT have cellulose walls. There are "fungi" with cellulose cell walls, but they are not actually fungi. Therefore, I'm going to try to change the paragraph... 169.229.121.94 00:37, 8 December 2006 (UTC)
the word algae represents a large group of dfferent organisms from different phylogentic group. The green algae are thee large group of algae from which the embroyophytes(higher plants) emerged —Preceding unsigned comment added by 91.111.146.214 ( talk) 11:54, 29 October 2008 (UTC)
Is the cell wall fully permeable?Rabidretardedolphinz 14:20, 23 December 2011 (UTC)awesome kid — Preceding unsigned comment added by DXproton ( talk • contribs)
The section on "Composition" states: "For example, endosperm cell walls in the seeds of cereal grasses, nasturtium, and other species, are rich in glucans and other polysaccharides."
Which kind of "nasturtium" is meant here? Is this Nasturtium (genus) or the plant commonly called "nasturium" that is actually in the genus Tropaeolum? -- EncycloPetey ( talk) 07:37, 30 September 2016 (UTC)
Overall, the plant cell wall section was very informational. However, there are a few edits I think would help enhance the article.
The links at the beginning of the "Composition" section are helpful, but a brief explanation of the relationship between each carbohydrate should be included. For example, why are all three needed? What are the weaknesses and benefits of each one that contribute to the structure and function of the cell wall?
The information on structural proteins is sufficient as a brief overview, but the reason why they are more prominent in specialized cells and in cell corners should be included.
In the “Formation” section, the theory of each model should be summarized.
There are very few citations throughout this section, especially under the “Composition” heading. Specifically, the place where the information of major polymers of wood was obtained should be cited.
Thank you! - Jedi Hannah ( talk) 01:15, 1 October 2016 (UTC)
Hello fellow Wikipedians,
I have just modified 5 external links on Cell wall. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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Cheers.— InternetArchiveBot ( Report bug) 23:27, 17 November 2016 (UTC)
Cell walls are present in most prokaryotes (except mollicute bacteria), in algae, fungi and eukaryotes including plants
The wording is a bit confusing here in that both algae and fungi are as much eukariotes as plants are. — Preceding unsigned comment added by 93.237.65.234 ( talk) 15:50, 2 July 2020 (UTC)
Disscussion on cell 2409:4064:2C83:4B2D:34AA:C63A:D767:E2A7 ( talk) 05:50, 3 February 2022 (UTC)
Hammad Khalid 103.174.206.94 ( talk) 09:38, 6 May 2023 (UTC)
![]() | This
edit request has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
Please change "The gycopeptide antibiotics" to "The glycopeptide antibiotics" Similing Joker ( talk) 10:20, 1 January 2024 (UTC)