Talk:Psychrophile

Wiki Education Foundation-supported course assignment

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): Ayang6369. Peer reviewers: Ayang6369.

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Wiki Education Foundation-supported course assignment

This article was the subject of a Wiki Education Foundation-supported course assignment, between 24 August 2020 and 7 December 2020. Further details are available on the course page. Student editor(s): Wholdenwood.

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Wiki Education Foundation-supported course assignment

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): Vivientan.

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Painful?

"Psychrophiles utilize a wide and unusually painful variety of metabolic pathways, including photosynthesis, chemoautotrophy (also sometimes known as lithotrophy), and heterotrophy,"

How are these pathways painful?

Cryophile

I think this word should be used more often in the article, because cryo- is a term I'm familiar with, whereas I wonder if psychro- is a misspelling of something else. Brewhaha@edmc.net 07:02, 5 April 2007 (UTC)

• I agree, this page should be renamed Cryophile, and the "Psychrophile" should be a redirect, instead of vice-versa. Geoffrey.landis (talk) 16:01, 29 March 2017 (UTC)
• Actually the term cryophile is more accurate because apparently a psychrophile is a cold-loving bacteria or archaea while cryophile is in general a cold-loving "higher level" organism like a polar fish. I think the sections on cryophiles should be linked to a page on cryophiles, instead of grouping all organisms under psychrophiles. Ayang6369 (talk) 05:12, 12 December 2017 (UTC)

References

Psychrotroph

"Psychrotroph" redirects to this page, but they are an entirely different classification. Psychrotrophs can grow between 0-7 degrees C, but have an optimum growth temperature between 20 - 30 degrees C (Listeria monocytogenes and Pseudomonas fluorescens).

Can someone please make a psychrotroph page?

P.S. Psychro- is the correct spelling. I'm more comfortable with the word "mate" than "buddy" or "dude", but the Americans arn't gonna switch for me!

The same problem with psychrotolerant as psychrotroph, these are operational definitions of a continuum.Tstrobaugh (talk) 21:07, 29 June 2009 (UTC)

How exactly are these extreme?

The stated temperature range in this article, 0 - 40C with an optimum around 15C, fully overlaps with all mammalian life. In fact, humans typically prefer temperatures somewhat colder than this range (by 5-10 degrees), though with a slightly higher optimum (again, by 5-10 degrees). So what is "extreme" about this classification? --70.131.121.26 (talk) 14:29, 20 February 2008 (UTC)

Some cryphiles live in solid ice by occupying occlusions. The conditions within are very extreme; limited space, high salinity, high pH as well extremes of pressure (if the ice is located in the middle of an ice flow) and a freezing temperature. Where as mammals are able to maintain an internal body temperature higher than freezing via homestatic mechanisms, extremophiles which live in cold have evolved to tollerate cold temperatures and still grow. This includes adaptations to the lipid bi-layer in order to keep it in a gel state (at freezing temperatures the bi-layer would normally go brittle, which would inhibit the cells ability to tranfert things across its membranes as well the possibility of the cell shattering). It also needs adaptations to cold caused denaturation of proteins and to find a way to speed up reactions which would other wise be too slow to facilitate growth. There are some reasons as to why they are classed as extremophiles. --188.220.179.203 (talk) 11:06, 1 June 2010 (UTC)

Alternative Spelling

This word is also spelled Psychrophyllic. I don't know the Wikipedia rules for allowing different spellings, nor the Wikipedia syntax for editing this onto the page.Bcwilmot (talk) 00:11, 8 December 2012 (UTC)

Can you please provide a reliable source which references the alternate spelling you are proposing. A quick google search shows over 77,000 references to the existing spelling, with under 2,000 reference to the alternate spelling. Tiggerjay (talk) 07:40, 15 January 2013 (UTC)

Merge in Psychrotrophic bacteria

I think we should merge the text from Psychrotrophic bacteria in to make it a sub-hsection of this article, and make Psychrotrophic bacteria a redirect to this section. There just isn't enough text in Psychrotrophic bacteria to make it a separate article, but merging the text here would make this article stronger. Geoffrey.landis (talk) 16:04, 29 March 2017 (UTC)

Adaptations

I changed "Survival" to "Adaptations" -- I felt Adaptations more accurately described the information in it.

I added a section on Viable But Non-culturable state, something some psychrophiles can transition into to survive the cold.

Ayang6369 (talk) 04:58, 12 December 2017 (UTC)