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Oyster mushroom (Pleurotus ostreatus)


Oyster mushroom (Pleurotus ostreatus)
Photo Information
Copyright: bob cat (bobcat08) Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 365 W: 19 N: 361] (1431)
Genre: Fungi
Medium: Color
Date Taken: 2007-11-04
Categories: Fungi
Camera: Canon G5
Exposure: f/4.5, 1/13 seconds
More Photo Info: [view]
Map: [view]
Photo Version: Original Version
Date Submitted: 2008-02-12 6:30
Viewed: 5523
Points: 36
[Note Guidelines] Photographer's Note [Dutch]
I visit in november 2007 the Staelduinsebos. That is a not so old forest in the neighbourhood from Hoek van Holland in the SW part of the Netherlands. I found this beautiful fungus and take the photo upwards, so you can see the underside. Handheld made. The DOF is not the best part. Nevertheless I hope you like this compo.

Oyster mushroom
From Wikipedia, the free encyclopedia
(Redirected from Pleurotus ostreatus)Oyster mushroom

Fruiting body of the Oyster mushroom in the Havré wood Belgium.
Conservation status
Secure
Scientific classification
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Tricholomataceae
Genus: Pleurotus
Species: P. ostreatus

Binomial name
Pleurotus ostreatus
Champ. Jura. Vosg. 1: 112, 1872

Pleurotus ostreatus
mycological characteristics:

gills on hymenium
no distinct cap or offset
hymenium is decurrent
stipe is bare
spore print is white
ecology is saprophytic
edibility: choice

The Oyster mushroom, or Pleurotus ostreatus, is a common mushroom prized for its edibility. Long cultivated in Asia, it is now cultivated around the world for food. It is related to the similarly cultivated "king oyster mushroom". Oyster mushrooms can also be used industrially for mycoremediation purposes.Contents
1 Name
2 Description
3 Habitat
4 Edible uses
5 Additional Information
6 References
7 See also
8 External links

Name

Both the Latin and common name refer to the shape of the fruiting body. The latin pleurotus (sideways) refers to the sideways-growth of the stem with respect to the cap while the latin ostreatus (and the English common name, oyster) refers to the shape of the cap which resembles the bi-valve of the same name. Many also believe that the name is fitting due to the flavor resemblance to oysters.

In Chinese, they are called píng gū (平菇; literally "flat mushroom").

The oyster is one of the more commonly sought wild mushrooms, though it can also be cultivated on straw and other media. It often has the scent of anise due to the presence of benzaldehyde.

Description
Cap: 5-25 cm broad, fan or oyster-shaped; Natural specimens range from white to gray or tan to dark-brown; margin inrolled when young, smooth and often somewhat lobed or wavy. Flesh white, firm, varies in thickness due to stipe arrangement.
Gills: Gills are white to cream, descend stalk if present. If so, stipe off-center with lateral attachment to wood.
Spores: The spores form a white to lilac-gray print on dark media.
Stipe: Often absent. When present it is short and thick.
Taste: Mild
Odor: Often has a mild scent of anise.

There are no poisonous lookalikes that grow in North America, however Omphalotus nidiformis is a toxic lookalike that is found in Australia and Japan.

Oyster mushroom on a tree.

Habitat

The Oyster Mushroom is wide-spread in temperate and subtropical forests throughout the world. It is a saprotroph that acts as a primary decomposer on wood.

Edible uses

The oyster mushroom is frequently used in Japanese and Chinese cookery as a delicacy: it is frequently served either on its own, although sometimes stuffed: and in stir-fry recipes too with soy sauce.

Additional Information

Oyster mushrooms are a natural source of statin drugs. Studies have shown that they typically contain 0.4% to 2.7% statins on a dry weight basis. Z. Naturforsch Study. A number of studies on lab animals have shown that adding Pleurotus to the diet can reduce cholesterol under some conditions.

The oyster mushroom is also one of the few known carnivorous mushrooms. Its mycelia can kill and digest nematodes. This is believed to be a way to obtain nitrogen.

Oyster mushrooms contain a small amount of arabitol which can cause gastrointestinal distress in some people. Arabitol is a sugar alcohol similar to xylitol, manitol and sorbitol; these sugar alcohols are widely used food additives and can also have laxative effectives in susceptible individuals.

Juyona, dejo, marhowie, NellyD, Adanac, clnaef, uleko, jusninasirun has marked this note useful
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Discussions
ThreadThread Starter Messages Updated
To Meshersmith: thank youbobcat08 1 08-24 00:55
To jusninasirun: thanksbobcat08 1 06-09 12:26
To uleko: goodmorning an thank youbobcat08 1 03-30 01:25
To LordPotty: have a nice daybobcat08 1 03-16 01:40
To Jamesp: have a nice day and thanksbobcat08 1 03-09 06:54
To clnaef: merci beaucoupbobcat08 1 03-07 02:47
To Adanac: thanksbobcat08 1 02-25 11:04
To NellyD: dank je welbobcat08 1 02-23 09:58
To marhowie: thanksbobcat08 1 02-21 11:56
To arfer: thanksbobcat08 1 02-19 01:03
To Gert-Paassen: dank je welbobcat08 3 02-17 22:39
To dB_grafix: thanksbobcat08 1 02-17 01:07
To K9madtex: thank youbobcat08 1 02-15 00:15
To Juyona: graciasbobcat08 1 02-13 23:27
To gracious: thanksbobcat08 1 02-12 23:46
To dejo: thanksbobcat08 1 02-12 23:43
To pablominto: good advicebobcat08 1 02-12 23:38
To SunToucher: bedankt voor de tipbobcat08 1 02-12 23:32
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Critiques [Translate]

Hoi Bob,
Ff geen tijd op je paddestoel op te zoeken, maar heb je op deze zeer mooie site gekeken? http://www.fotoherbarium.nl/paddestoelen.php Ik heb hier meestal de ID's kunnen vinden.
Een mooie lage compositie met goed detail. Alleen jammer dat de lucht zo licht is.
Groeten,
Niek

Hello Bob,
Fine details in the mushrooms!
Seems like they are thriving on that old trunk...
I understand you have low light here, maybe fill flash would be an idea so you can get wider DOF? However the backlit subject is attractive too, delicate colours!
Greetings,
Pablo

Hoi Bob,

Misschien een oesterzwam?
Moeilijk te determineren zo.
Vind de achtergrond ook minder, zelf probeer ik altijd een mooie achtergrond te zoeken of wacht net zo lang tot ik god licht heb.

groet Gert

  • Great 
  • Juyona Gold Star Critiquer/Silver Workshop Editor [C: 2232 W: 10 N: 2971] (16891)
  • [2008-02-12 13:11]
  • [+]

Hola Bob,
perfecto trabajo color y detalles...
excelente primer plano.
saludos

Hello my dear friend Bob,
very delighted to see your posting once again, how are you!
a good composition of detailed mushrooms with fine colouration in the shot!
my best regards and best wishes goes to you
greeting
tony

  • Great 
  • dejo Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 344 W: 51 N: 520] (2242)
  • [2008-02-12 15:05]
  • [+]

Hello Bob,
Great pic, I like this POV very much!
beautiful details capture,
great work,
Dejan

I don't what the fungus is, but it's neat. Excellent POV. When I first looked at it at work it seemed really dark underneath, but on my monitor at home it's just right. well done.

I do not know the ID of this, but do like the image. The focus and DOF are very well seen. I like the close ups of these, and of mushrooms. Very interesting, and artistic.
Thanks for the comments,and for sharing this..

Hello Bob

Excellent POV with wonderful clarity.
The focus and details are wonderful,and the textures of the fungi show well.
The colours are natural and well saturated.
TFS

Rob

Hi Bob - Thanks for sharing this fungi, great POV, detail, and composed well. It falls a bit short in the exposure department, but a nice post, none-the-less.
Howard

Hoi Bob,

Ik kan je helaas ook niet helpen met de ID, maar ik vind het wel een mooie paddestoel. Je lage standpunt werkt hier erg goed en mooi gedetaileerd ook. Bedankt!

Groetjes, Nel

Hello Bob,
Sorry i can't help with the identification, but this is a wonderful composition with beautiful colors and fine detail. The depth of field is great in my opinion, thank you Bob.
Rick

Bonjour,
Une belle vue de ces champignons aux belles couleurs.
Bonne journée.
clnaef

  • Great 
  • Jamesp Gold Star Critiquer/Gold Note Writer [C: 1369 W: 9 N: 6334] (18906)
  • [2008-03-08 16:30]
  • [+]

Hi Bob

Beautiful shot - good, clear colours and excellent exposure, POV and detail.

TFS

James

Beautiful shot Bob.
You've captured this Pleurotus really well.
Our fungi season is just starting now so you will be seeing a few more from me too.
Very nice work on this one.
Very well done !
Steve

  • Great 
  • uleko Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3396 W: 172 N: 3310] (10940)
  • [2008-03-29 7:51]
  • [+]

Hello Bob,
Beautiful capture of this little group of fungi, a spcies new to me! Very interesting to see how it is growing. Great sharpness and fine light and colours too. Well done!
TFS and regards, Ulla

Hello Bob. Very good close capture of this mushroom. I like the fine detail and pleasant perspective of the shot. Thanks for sharing and best regards. Jusni

Excelente click!
Roberto

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