fungi, any of about 99,000 known species of organisms of the kingdom Fungi, which includes the yeasts, rusts, smuts, mildews, molds, and mushrooms. There are also many funguslike organisms, including slime molds and oomycetes (water molds), that do not belong to kingdom Fungi but are often called fungi. Many of these funguslike organisms are included in the kingdom Chromista. Fungi are among the most widely distributed organisms on Earth and are of great environmental and medical importance. Many fungi are free-living in Soil or water; others form parasitic or symbiotic relationships with Plants or animals.
Fungi are eukaryotic organisms; i.e., their cells contain membrane-bound organelles and clearly defined nuclei. Historically, fungi were included in the plant kingdom; however, because fungi lack chlorophyll and are distinguished by unique structural and physiological features (i.e., components of the cell wall and cell membrane), they have been separated from plants. In addition, fungi are clearly distinguished from all other living organisms, including animals, by their principal modes of vegetative Growth and nutrient intake. Fungi grow from the tips of filaments (hyphae) that make up the bodies of the organisms (mycelia), and they digest organic matter externally before absorbing it into their mycelia.
While mushrooms and toadstools (poisonous mushrooms) are by no means the most numerous or economically significant fungi, they are the most easily recognized. The Latin word for mushroom, fungus (plural fungi), has come to stand for the whole group. Similarly, the study of fungi is known as mycology—a broad application of the Greek word for mushroom, mykēs. Fungi other than mushrooms are sometimes collectively called molds, although this term is better restricted to fungi of the sort represented by bread mold. (For information about slime molds, which exhibit features of both the animal and the fungal worlds, see protist.)
Size range
The mushrooms, because of their size, are easily seen in fields and forests and consequently were the only fungi known before the invention of the Microscope in the 17th century. The microscope made it possible to recognize and identify the great variety of fungal species living on dead or live organic matter. The part of a fungus that is generally visible is the fruiting body, or sporophore. Sporophores vary greatly in size, shape, colour, and longevity. Some are microscopic and completely invisible to the unaided eye; others are no larger than a pin head; still others are gigantic structures. Among the largest sporophores are those of mushrooms, bracket fungi, and puffballs. Some mushrooms reach a diameter of 20 to 25 cm (8 to 10 inches) and a height of 25 to 30 cm (10 to 12 inches). Bracket, or shelf, fungi can reach 40 cm (16 inches) or more in diameter. A specimen of the bracket fungus Fomitiporia ellipsoidea discovered in 2010 on Hainan Island in southern China had a fruiting body measuring 10.8 metres (35.4 feet) in length and 82–88 cm (2.7–2.9 feet) in width. It may have held some 450 million spores and weighed an estimated 400–500 kg (882–1,102 pounds), at the time making it the largest fungal fruiting body ever documented. Puffballs also can grow to impressive sizes. The largest puffballs on record measured 150 cm (5 feet) in diameter. The number of spores within such giants reaches several trillion.
Harmfull fungi
Many pathogenic fungi are parasitic in humans and are known to cause diseases of humans and other animals. In humans, parasitic fungi most commonly enter the body through a wound in the epidermis (skin). Such wounds may be insect punctures or accidentally inflicted scratches, cuts, or bruises. One example of a fungus that causes disease in humans is Claviceps purpurea, the cause of ergotism (also known as St. Anthony’s fire), a disease that was prevalent in northern Europe in the Middle Ages, particularly in regions of high rye-bread consumption. The wind carries the fungal spores of ergot to the flowers of the rye, where the spores germinate, infect and destroy the ovaries of the plant, and replace them with masses of microscopic threads cemented together into a hard fungal structure shaped like a rye kernel but considerably larger and darker. This structure, called an ergot, contains a number of poisonous organic compounds called alkaloids. A mature head of rye may carry several ergots in addition to noninfected kernels. When the grain is harvested, much of the ergot falls to the ground, but some remains on the plants and is mixed with the grain. Although modern grain-cleaning and milling methods have practically eliminated the disease, the contaminated flour may end up in bread and other food products if the ergot is not removed before milling. In addition, the ergot that falls to the ground may be consumed by cattle turned out to graze in rye fields after harvest. Cattle that consume enough ergot may suffer abortion of fetuses or death. In the spring, when the rye is in bloom, the ergot remaining on the ground produces tiny, black, mushroom-shaped bodies that expel large numbers of spores, thus starting a new series of infections.
Other human diseases caused by fungi include athlete’s foot, ringworm, aspergillosis, histoplasmosis, and coccidioidomycosis. The yeast Candida albicans, a normal inhabitant of the human mouth, throat, colon, and reproductive organs, does not cause disease when it is in ecological balance with other microbes of the Digestive System. However, disease, age, and hormonal changes can cause C. albicans to grow in a manner that cannot be controlled by the body’s defense systems, resulting in candidiasis (called thrush when affecting the mouth). Candidiasis is characterized by symptoms ranging from irritating inflamed patches on the skin or raised white patches on the tongue to life-threatening invasive infection that damages the lining of the heart or brain. Improved diagnosis and increased international travel, the latter of which has facilitated the spread of tropical pathogenic fungi, have resulted in an increased incidence of fungal disease in humans. In addition, drug therapies used to manage the immune system in transplant and cancer patients weaken the body’s defenses against fungal pathogens. Patients infected with human immunodeficiency virus (HIV), the causative agent of acquired immunodeficiency syndrome (AIDS), have similarly weakened immune defenses against fungi, and many AIDS-related deaths are caused by fungal infections (especially infection with Aspergillus fumigatus).
Usefull fungi
Recycling
Fungi, together with bacteria, are responsible for most of the recycling which returns dead material to the soil in a form in which it can be reused. Without fungi, these recycling activities would be seriously reduced. We would effectively be lost under piles many metres thick, of dead plant and animal remains
Mycorrhizae
and plant growth Fungi are vitally important for the good growth of most plants, including crops, through the development of mycorrhizal associations. As plants are at the base of most food chains, if their growth was limited, all animal life, including human, would be seriously reduced through starvation.
Food
Fungi are also important directly as food for humans. Many mushrooms are edible and different species are cultivated for sale worldwide. While this is a very small proportion of the actual food that we eat, fungi are also widely used in the production of many foods and drinks. These include cheeses, beer and wine, bread, some cakes, and some soya bean products.
Medicines
Penicillin, perhaps the most famous of all antibiotic drugs, is derived from a common fungus called Penicillium. Many other fungi also produce antibiotic substances, which are now widely used to control diseases in human and animal populations. The discovery of antibiotics revolutionized Health care worldwide.
Some fungi which parasitise caterpillars have also been traditionally used as medicines. The Chinese have used a particular caterpillar fungus as a tonic for hundreds of years. Certain chemical compounds isolated from the fungus may prove to be useful treatments for certain types of cancer.
,
Fungi are a diverse group of eukaryotic organisms that are neither plants nor animals. They are found in all habitats on Earth, and play an important role in the Environment. Fungi are also used in a variety of industries, including food production, medicine, and agriculture.
Fungi are classified into five main phyla: Ascomycota, Basidiomycota, Deuteromycota, Chytridiomycota, and Zygomycota.
Ascomycota are the largest phylum of fungi, and include yeasts, mushrooms, and truffles.
Basidiomycota include mushrooms, puffballs, and bracket fungi.
Deuteromycota are a diverse group of fungi that do not have a sexual stage in their life cycle.
Chytridiomycota are a small group of fungi that are found in aquatic habitats.
Zygomycota are a small group of fungi that are found in soil and decaying organic matter.
Anatomy
Fungi are eukaryotic organisms, which means that their cells have a nucleus. Fungi also have a cell wall that is made of chitin, a substance that is also found in the exoskeletons of insects.
The basic unit of a fungus is the hypha. Hyphae are long, thin filaments that grow from the main body of the fungus, called the mycelium. The mycelium can be found in soil, on decaying organic matter, or in the bodies of plants and animals.
The fruiting body is the part of the fungus that produces spores. Spores are tiny, reproductive units that are dispersed by the wind or water. When a spore lands in a suitable environment, it germinates and grows into a new fungus.
Fungi can reproduce both sexually and asexually. Asexual reproduction is the most common type of reproduction in fungi. It involves the production of spores that can germinate and grow into new fungi. Sexual reproduction is less common in fungi, but it is important for the production of new genetic combinations.
In sexual reproduction, two fungi fuse together to form a zygote. The zygote then divides and grows into a new fungus.
Fungi are found in all habitats on Earth, including soil, water, and on the bodies of plants and animals. They play an important role in the environment by decomposing organic matter, recycling nutrients, and controlling pests.
Fungi are also important in the food chain. They are a source of food for many animals, including insects, birds, and mammals.
Economic importance
Fungi are used in a variety of industries, including food production, medicine, and agriculture.
In food production, fungi are used to make bread, cheese, and wine. They are also used to produce ENZYMES that are used in the food Industry.
In medicine, fungi are used to produce antibiotics, antifungal drugs, and Vaccines. They are also used in research to develop new drugs.
In agriculture, fungi are used to control pests and diseases. They are also used to improve Soil fertility and to produce biofuels.
Fungi in popular culture
Fungi have been featured in mythology, literature, film, and art for centuries.
In mythology, fungi are often associated with death and decay. They are also associated with magic and the supernatural.
In literature, fungi have been used as symbols of evil, decay, and death. They have also been used as symbols of transformation and rebirth.
In film, fungi have been used to create monsters and aliens. They have also been used to create scenes of horror and suspense.
In art, fungi have been used to create beautiful and intricate designs. They have also been used to create images of death and decay.
Fungi in the future
Fungi are a fascinating and important group of organisms. They play an important role in the environment and in the economy. Fungi are also a source of inspiration for artists and writers.
In the future, fungi are likely to play an even greater role in our lives. They are being studied for their potential to produce new drugs and biofuels. They are also being used to develop new ways to clean up pollution and to improve soil fertility.
Fungi are a vital part of our planet, and they deserve our respect and admiration.
What are the different types of fungi?
Fungi are a diverse group of organisms that can be found in many different environments. They can be single-celled or multicellular, and they can live on land or in water. Some fungi are beneficial to humans, while others can cause diseases.
The main types of fungi are:
Molds: Molds are a type of fungus that can grow on food, clothing, and other materials. They are usually black or green in color, and they can cause allergic reactions in some people.
Mushrooms: Mushrooms are a type of fungus that grows above ground. They are usually edible, and they are often used in cooking.
Yeasts: Yeasts are a type of fungus that is used in baking and brewing. They are also used to make some types of cheese.
Lichens: Lichens are a type of fungus that grows on rocks and trees. They are made up of a fungus and an alga or cyanobacterium.
What are the characteristics of fungi?
Fungi are eukaryotic organisms, which means that their cells have a nucleus. They are also heterotrophs, which means that they cannot make their own food and must obtain it from other sources. Fungi typically reproduce by spores, which are tiny, lightweight cells that can be dispersed by the wind or water.
Fungi are found in a wide variety of habitats, including soil, water, and on living and dead organisms. They play an important role in the environment by decomposing organic matter and recycling nutrients. Fungi also produce a variety of compounds that are used in medicine, food, and industry.
What are the benefits of fungi?
Fungi have many benefits to humans and the environment. They are used in a variety of industries, including agriculture, food production, and medicine. Fungi also play an important role in the environment by decomposing organic matter and recycling nutrients.
Some of the benefits of fungi include:
Fungi are used to produce antibiotics, which are used to treat bacterial infections.
Fungi are used to produce enzymes, which are used in a variety of industrial processes.
Fungi are used to produce biofuels, which are a renewable Source Of Energy.
Fungi are used to decompose organic matter, which helps to improve soil fertility.
Fungi play an important role in the food chain, as they are a source of food for many animals.
What are the risks of fungi?
Fungi can also pose some risks to humans and the environment. Some fungi can cause diseases in humans and animals. Fungi can also damage crops and other plants.
Some of the risks of fungi include:
Fungi can cause diseases in humans, such as athlete’s foot and ringworm.
Fungi can cause diseases in animals, such as bovine spongiform encephalopathy (BSE), also known as mad cow disease.
Fungi can damage crops, such as wheat and corn.
Fungi can damage buildings, such as wooden structures.
How can we protect ourselves from the risks of fungi?
There are a number of things we can do to protect ourselves from the risks of fungi. We can avoid contact with fungi that can cause diseases, such as athlete’s foot and ringworm. We can also cook food properly to kill any fungi that may be present. We can also take steps to prevent fungi from damaging our crops and buildings, such as using fungicides and maintaining proper sanitation.
Which of the following is not a type of fungus? (A) Mushroom (B) Lichen (C) Algae (D) Yeast
Fungi are important because they: (A) Decompose dead organisms (B) Produce antibiotics (C) Cause diseases (D) All of the above
Which of the following is not a characteristic of fungi? (A) They are eukaryotic (B) They have cell walls made of chitin (C) They are heterotrophic (D) They are photosynthetic
Fungi reproduce by: (A) Spores (B) Sexual reproduction (C) Asexual reproduction (D) All of the above
The largest organism on Earth is a fungus. True or False?
Mushrooms are the fruiting bodies of fungi. True or False?
Yeast is a type of fungus that is used in baking and brewing. True or False?
Mold is a type of fungus that can cause food to spoil. True or False?
Lichens are a symbiotic relationship between a fungus and an alga. True or False?