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Flammulina filiformis

life science Maturity 11-13 Next article →

The enoki mushroom, known scientifically as *Flammulina filiformis*, is a species of agaric mushroom. An agaric is a type of fungus that features gills under its cap.

Golden needle mushrooms 1
Golden needle mushrooms 1

This mushroom is a major part of food culture in East Asia. It is a common ingredient in Japanese and Chinese cuisine. For a long time, scientists thought it was the same species as the European *Flammulina velutipes*. However, new DNA sequencing changed this view. DNA sequencing is a method used to look at the genetic code of an organism. This research proved that *F. filiformis* and *F. velutipes* are actually two distinct species. This distinction was officially recognized after the mushroom was described from China in 2015.

The physical structure of the mushroom is quite specific. They grow in clusters rather than as single stems. Each mushroom has a cap that starts as a convex, or rounded, shape. As the cap expands, it becomes flatter. The surface of the cap is smooth and can become viscid, which means sticky, when it is damp. The color of the cap ranges from ochraceous yellow to yellow-brown. Underneath the cap are the lamellae, which are the gills. These gills are cream or yellowish-white in color. Each mushroom also has a stipe, which is the scientific name for the stem. The stipe can be up to long and is smooth. It is pale yellow at the top, or apex, but turns yellow-brown or dark brown near the base. The mushroom produces a white spore print. The spores themselves are ellipsoid or cylindrical in shape.

There is a major difference between wild mushrooms and those grown in farms. In nature, *F. filiformis* grows on the dead wood of various broad-leaved trees. These include species like *Betula platyphylla* and *Salix* species. In cultivation, the environment is strictly controlled to change how the mushroom looks. Most enoki are grown in total darkness. This lack of light results in fruit bodies that are white or very pale. These cultivated mushrooms also have very long stipes and very small caps. If the mushrooms are exposed to light, they develop more normal features. They will have shorter stems and more color in their caps.

Enoki paddenstoel
Enoki paddenstoel

The history of growing these mushrooms is very long. People in China have been cultivating *F. filiformis* since 800 AD. Today, it is a massive global industry. In 2010, commercial production in China reached an estimated 1.57 million tonnes per year. Japan produced an additional 140,000 tonnes per year during that same time. Modern large-scale factories use mechanization to harvest over 300,000 tons of mushrooms annually. Farmers grow them on lignocellulosic substrates. These are materials made of plant parts, such as sawdust, wheat straw, or paddy straw.

The growing process follows a specific sequence of temperature and humidity changes. First, the fungus goes through an incubation phase. During this time, the substrate must be warm and moist, between 18 and 25 °C. Next, the mushroom needs a change to begin growing visible parts. This is called pinning. Pinning is triggered when the temperature drops to between 7 and 10 °C. The optimal temperature for the actual fruiting stage is between 10 and 16 °C. Humidity must also be very high. It stays between 95 and 100% during pinning and 85 to 95% during fruiting. When harvesting, it is best to pick them when the cap is still tightly closed.

Golden needle mushrooms 1
Golden needle mushrooms 1

Enoki mushrooms are also very nutritious. They are composed of 88% water, 8% carbohydrates, and 3% protein. They contain very little fat. In a standard reference amount, they provide 37 calories of energy. They are a rich source of niacin, providing 46% of the Daily Value (DV). They also provide 28% DV of pantothenic acid. Other nutrients include thiamine, riboflavin, folate, and potassium. Scientists are even studying how to use the leftover stem waste. Adding stem powder to meat can increase dietary fiber and ash content. This can make meat more tender and help it stay fresh longer.

Enoki paddenstoel
Enoki paddenstoel

Finally, there are important safety steps for handling and eating these mushrooms. Because they can be contaminated with *Listeria monocytogenes*, they should never be eaten raw. You must always cook them properly before eating. For storage, they should be kept in the cold. Optimal freshness is found at temperatures between 7 and 10 °C. If you are storing them for fewer than seven days, a temperature of 1 to 2 °C is advised. It is also important to keep uncooked mushrooms separate from other foods. This helps prevent cross-contamination and ensures food security.

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🖼️ Images & Media (3)
File:Golden needle mushrooms 1.jpg
Golden needle mushrooms 1.jpg
File:Enoki mushrooms (50313211173).jpg
Enoki mushrooms (50313211173).jpg
File:Enoki paddenstoel.jpg
Enoki paddenstoel.jpg
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