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Agaricus Subrufescens
Taxonomy
Agaricus subrufescens was first described by the American botanist Charles Horton Peck in 1893. During the late 19th and early 20th century, it was cultivated for the table in the eastern United States. It was discovered again in Brazil during the 1970s, and misidentified as Agaricus blazei Murrill, a species originally described from Florida. It was soon marketed for its purported medicinal properties under various names, including ABM (for Agaricus blazei Murill), Cogumelo do Sol (mushroom of the sun), Cogumelo de Deus (mushroom of God), Cogumelo de Vida (mushroom of life), Himematsutake, Royal Sun Agaricus, Mandelpilz, and Almond Mushroom.
In 2002, Didukh and Wasser correctly rejected the name A. blazei for this species, but unfortunately called the Brazilian fungus A. brasiliensis, a name that had already been used for a different species, Agaricus brasiliensis Fr. (1830). Richard Kerrigan undertook genetic and interfertility testing on several fungal strains and showed that samples of the Brazilian strains called A. blazei and A. brasiliensis were genetically similar to, and interfertile with, North American populations of Agaricus subrufescens. These tests also found European samples called A. rufotegulis to be of the same species. Because A. subrufescens is the oldest name, it has taxonomical priority.
Note that Agaricus blazei Murrill is a perfectly valid name, but for a completely different mushroom. Agaricus silvaticus Schaeff. is also a perfectly valid name for a common, north temperate, woodland mushroom. Neither is a synonym of Agaricus subrufescens.
Description
The floccose stipe and annulus of A. subrufescens
The cap is initially hemispherical, later becoming convex, with a diameter of 5 to 18 centimetres (2.0 to 7.1 in). The cap surface is covered with silk-like fibers, although in maturity it develops small scales (squamulose). The color of the cap may range from white to grayish or dull reddish-brown; the cap margin typically splits with age. The flesh of A. subrufescens is white, and has the taste of "green nuts", with the odor of almonds. The gills are not attached to the stalk (free), narrow, and crowded closely together. They start out whitish in color, then later pinkish and finally black-brown as the spores mature. Spores are ellipsoid, smooth, dark-purplish brown when viewed microscopically, with dimensions of 67.5 by 45 m. The stipe is 6 to 15 centimetres (2.4 to 5.9 in) by 1 to 1.5 centimetres (0.39 to 0.59 in) thick, and bulbous at the base. Initially solid, the stipe becomes hollow with age; it is cottony (floccose) to scaly towards the base. The annulus is abundant and double-layered; it is bent downwards towards the stem, smooth and whitish on the upper side, and covered with cottony scales on the lower side.
Distribution and habitat
Agaricus subrufescens forms fruitbodies singly or in clusters in leaf litter in rich soil, often in domestic habitats. It was originally described from the northeastern United States, but has been found growing in California, Hawaii, Great Britain, the Netherlands, Israel, Taiwan, and Brazil.
Edibility
Aroma
Agaricus subrufescens is a choice edible, with a somewhat sweet taste and fragrance of almonds. The almond smell of the mushroom is mostly due to the presence of benzaldehyde, benzyl alcohol, benzonitrile, and methyl benzoate.
Commercial use
Due to the fact Agaricus subrufescens contains a high level of beta glucans, compounds known for stimulating the immune system, the fungus is used in oncological therapy in Japan and Brazil. In addition to beta-glucans, the mushroom's effect on the immune system is believed to be due to other polysaccharides such as alpha-glucans. In Japan, Agaricus subrufescens is sold under the brand names Sen-Sei-Ro Gold, and ABMK, and is used by an estimated 500,000 people In Japan, Agaricus subrufescens is also the most popular complementary and alternative medicine used by cancer patients. Although Agaricus subrufescens is cultivated in the United States, the largest exporters are China and Brazil. It has been noted in a scientific review of A. subrufescens research, that the range of quality in A. subrufescens cultivation can affect the mushroom's ability to impact cells of the immune system.
Recently, Watanabe et al. published a report in the Biological & Pharmaceutical Bulletin on a novel hybrid of A. subrufescens called Basidiomycetes-X (BDM-X) and a US patent was issued on a novel hybrid of the A. subrufescens edible mushroom which was cross-bred (hybridized) with another medicinal mushroom resulting in a new hybrid claimed to possess 10 to 3000 times the potency of similar but unpatented mushrooms.
Research
The neutrality of this article is disputed. Please see the discussion on the talk page. Please do not remove this message until the dispute is resolved. (March 2009)
Many researchers have studied Agaricus subrufescens, as well as other medicinal mushrooms for close to 50 years, due to laboratory tests which show they may stimulate immune system cells and the production of immune system cytokines. Below is a summary of this research, which is often based on animal or cellular models. Research conducted on the mushroom's ability to impact the human immune system or human diseases is limited.
Cancer research
Animal and cellular research has shown that Agaricus subrufesscens application or consumption appears to offer anti-cancer properties.
Experimental Model
Experimental Effect (Cell culture)
Experimental Effect (Animal research)
Experimental Effect (Clinical)
Colorectal cancer
Benefited hematological and immunological parameters
Fibrosarcoma
Inhibited growth via apoptosis
Inhibited growth
Sarcoma
Inhibited angiogenesis. Inhibited growth
Gynaecological cancer
Increased NK cell activity, quality of life
Ovarian cancer
Inhibited growth and metastasis via apoptosis induction
Inhibited metastasis, growth
Lung cancer
Inhibited growth via apoptosis
Inhibited metastasis, growth
Leukaemia
Inhibited growth via apoptosis
Inhibited growth
Myeloma
Inhibited growth
Hepatocarcinoma
Inhibited abnormal collagen formation
Inhibited growth
Stomach cancer
Inhibited growth via apoptosis
Prostate cancer
Inhibited growth via apoptosis
Inhibited growth
Skin cancer
Inhibited growth when applied orally or topically
Immune system
Cellular and animal research has shown that Agaricus subrufescens may stimulate immune system cells and the production cytokines, like interferons and interleukins (reviewed by G. Hetland).
Direct anti-viral properties
Agaricus subrufescens mushrooms are known to have anti-viral properties in cell culture. The ability of Agaricus subrufescens to inhibit viruses in the human body has not been studied. Other mushrooms are also known to have anti-viral, anti-bacterial, and anti-fungal activity in cell culture.
Other possible effects
Besides evidence Agaricus subrufescens may up-regulate the immune system, additional research suggests the mushroom has a beneficial effect on cholesterol, inhibiting pathogenic factors, and inhibiting angiogenesis.
Limited clinical and animal research suggests, Agaricus subrufescens consumption may lower blood glucose levels and improve insulin resistance.
See also
Fungi portal
Beta-glucan
List of Agaricus species
Medicinal mushrooms
References
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Categories: Agaricus | Edible fungi | Medicinal fungi | Fungi of Asia | Fungi of South America | Fungi of North AmericaHidden categories: Wikipedia articles needing page number citations | All pages needing cleanup | Accuracy disputes from October 2009 | NPOV disputes from March 2009 | All NPOV disputes
About the Author
I am China Crafts Suppliers writer, reports some information about bamboo dinner plates , italian ceramic dishes.
income tax question?
If a person is retired ang gets a pension of around 27,000 a year and contributed himself to the pension, how mich if any is taxable, he is single with 2 deprndents under eighteen, this is the only income he has
The amount he contributed isn't taxable. The rest is taxable as ordinary income - the amount of tax depends on the taxable total and what other deductions he has if any, but his federal income tax would very possibly be zero if the dependents are his qualifying children under age 17, since the $2000 child tax credit would wipe out any tax.
A-10: Michigan ANG Commercial - Official Version (2007)
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