Fungi
42 questions tagged Fungi — spanning every one of the seven Ws.
Which is the largest living organism on Earth?
A honey fungus colony in Oregon is often cited as the largest living organism on Earth. The Armillaria ostoyae colony covers about 965 hectares, or 9.65 square kilometers.
Which fungus is the largest organism on Earth?
A honey fungus in Oregon is often cited as the largest known organism, spreading over about 965 hectares.
How do fungi reproduce and spread?
Many fungi reproduce by releasing microscopic spores that travel through air, water, or animals. When conditions are right, those spores germinate and grow into new fungal bodies.
How do mushrooms reproduce?
Mushrooms reproduce by releasing enormous numbers of microscopic spores, which drift away and grow into new fungal networks where they land.
Why do some fungi glow in the dark?
Some fungi are bioluminescent because they produce light through a chemical reaction. The glow is usually faint and greenish.
Why do fungi release so many spores at once?
Fungi release spores in huge numbers to increase the chance that some will land in the right place. Most spores never survive, so mass production is essential.
Why do mycorrhizal fungi help trees grow better?
Mycorrhizal fungi extend the tree’s root system and improve access to water and nutrients, especially phosphorus and nitrogen. In return, the tree supplies sugars made by photosynthesis.
Why do some fungi grow inside wood?
Wood-decay fungi feed on compounds in dead or weakened wood. They break down lignin and cellulose, recycling nutrients back into ecosystems.
Why do some fungi form fairy rings?
Fairy rings appear when a fungus spreads outward from a central point in the soil. The older center may die back while the active edge keeps growing and fruiting.
What is mycorrhiza?
Mycorrhiza is a mutualistic relationship between a fungus and a plant root. The fungus helps the plant absorb water and minerals, while the plant supplies sugars to the fungus.
What is a mycorrhizal network?
A mycorrhizal network is a web of fungal threads linking plant roots in soil. It can move nutrients and signals between plants.
What are ectomycorrhizae?
Ectomycorrhizae are fungi that form a sheath around plant roots without entering the root cells. They are especially common on many trees.
What are arbuscular mycorrhizae?
Arbuscular mycorrhizae are fungal partnerships where the fungus enters root cells and forms tiny tree-like structures. They are among the oldest and most widespread plant-fungus symbioses.
What is a mushroom?
A mushroom is the fruiting body of some fungi. It is the spore-producing structure that appears above ground or on wood.
What is a decomposer?
A decomposer is an organism that breaks down dead material and recycles nutrients. Fungi are among the most important decomposers in forests.
What is a saprophyte?
A saprophyte is an organism that feeds on dead organic matter. The term is often used for fungi and bacteria that decompose plant material.
When did the oldest known fossil mushrooms form?
The oldest widely cited mushroom fossils are about 100 million years old.
When did fungi first colonize land?
Fungi likely colonized land more than 450 million years ago, possibly as early as 480 million years ago.
When did lichens first appear in the fossil record?
Lichens are known from fossils at least 410 million years old, and may have originated even earlier.
When did mycorrhizal fungi first form partnerships with plants?
Plant-fungus partnerships likely began more than 400 million years ago, around the time plants were first colonizing land.
When did the oldest known termite-fungus gardens date to?
The oldest known fungus-farming termites date to about 30 million years ago.
When did the first fungal penicillin production begin?
Large-scale penicillin production began in the early 1940s, especially during World War II.
When was the first edible mushroom cultivated commercially?
Edible mushrooms were being cultivated commercially in the 17th century, especially in France.
When did the largest known fungal organism begin growing?
The largest known fungal organism, Armillaria ostoyae, is estimated to have started growing about 2,400 years ago.
When was the first scientific description of a fungus published?
Fungi were described in early scientific taxonomy in the 18th century, especially by Carl Linnaeus in 1753.
When did the first fungal genome get sequenced?
The first fungal genome was sequenced in 1996, for the yeast Saccharomyces cerevisiae.
When did fungi first become used in industrial food production on a large scale?
Industrial use of fungi in food production expanded in the late 19th and early 20th centuries, especially for yeast and mushroom cultivation.
Where is the world's largest tropical rainforest fungus network found?
Huge fungal networks are found in the Amazon Basin, where fungi play major roles in recycling nutrients in tropical forest soils. The mycelium itself is usually hidden underground or inside dead wood.
Where are mycorrhizal fungi found in close partnership with plant roots?
They are found worldwide, wherever plants and compatible fungi occur, from forests to grasslands. The partnership happens in soil, where fungal threads connect to roots.
Where do truffle fungi naturally grow underground?
They grow in soil, usually near the roots of certain trees, especially in parts of Europe and North America. Truffles develop below ground rather than above it like ordinary mushrooms.
Where is the world's largest living fungus found?
A giant Armillaria fungus in Oregon’s Malheur National Forest is widely cited as the largest known living fungus. It spreads mostly underground through a vast network of mycelium.
Where are the oldest known fungi fossils found?
Some of the oldest fungal fossils come from ancient rocks in China, dating back hundreds of millions of years. Early fungi are also known from very old sediments in Scotland and elsewhere.
Where do fungi help make up the rich soils of tropical cloud forests?
They are found in mountain cloud forests in places such as Costa Rica, Ecuador, and eastern Africa. Moist, misty conditions support abundant fungal growth in leaf litter and dead wood.
Which fungus is the largest living organism by area?
A honey fungus in Oregon is often cited as the largest living organism by area. It spreads underground across more than 2.4 square miles, or about 965 hectares.
Which fungus is the oldest known living organism?
A honey fungus in Oregon is often estimated to be thousands of years old, possibly around 2,400 years or more. Exact ages are difficult to prove because fungi spread underground.
Which fungus has the largest fruiting body ever recorded?
Some bracket fungi can form enormous fruiting bodies, but the best-known record holders are not as precisely measured as trees. The largest examples can span several meters across.
Which fungus is the deadliest poisonous mushroom?
The death cap is the most notorious deadly mushroom. Amanita phalloides is responsible for many fatal poisonings worldwide.
Which fungus is the largest edible mushroom by cultivated size?
The king oyster mushroom is one of the largest commercially grown edible mushrooms. It can produce thick, meaty stems and substantial caps under cultivation.
Which fungus forms the biggest underground network in forests?
Mycorrhizal fungi can form huge underground networks with plant roots, and some species cover vast areas. These networks help trees exchange nutrients and water.
Whose work first showed that fungi reproduce by spores?
Anton de Bary is widely regarded as a founder of modern mycology and plant pathology. In the 19th century, he demonstrated key parts of fungal reproduction, including the role of spores.
How do mycorrhizal fungi help trees get nutrients from the soil?
Mycorrhizal fungi extend a tree’s root system with fine threads called hyphae. In return for sugars from the tree, the fungi help absorb water and minerals, especially phosphorus and nitrogen.
How do mushrooms release spores so efficiently?
Many mushrooms launch spores using tiny water drops and a surface-tension mechanism that flicks them free. The spores then catch air currents and disperse widely.