Fungi
Fungi are small, microscopic, usually
filamentous, achlorophyllous, branched, spore bearing organisms that have cell
wall. Fungi do not have any nucleus that why they are eukaryotic. And like in
plant cell their cell also has cell wall. They have their own kingdom in five
kingdom system, “the kingdom fungi”. In fungi the nuclear envelope is
present.The cell wall in fungi is chitin. Their mode of nutrition is absorptive
heterotroph. In fungi the multi-cellularity is present in most form. Most fungi
are decomposers. They live on organic material, secrete digestive enzymes and
absorb small organic molecules formed by digestion by enzymes. And all the
characteristics is present which is related to the kingdom fungi. The biggest example
of fungi is mushroom. The fungi may be useful and harmful. Some of the fungi is
eatable and human use in their meal,Like mushroom.
Characteristics of Fungi:
Fungi may be unicellular such as yeast or
multicellular such as hyphae.
Fungi live as parasites or saprophytes i.e.
they absorb nutrients from other living or dead organisms.
Cell wall is similar in structure to plants
but differ in chemical composition. Fungi cell walls are composed of mostly of
chitin and plant cell walls are composed mostly of cellulose. Fungi reproduce
by releasing spores that are produced sexually or asexually.
Effects of Fungi:
The effects of fungi are useful as well as
harmful as given below;
Useful Effects:
Some fungi are edible like mushrooms.
Fungi decompose dead organic matter.
Fungi are used in fermentation process like
to make bread rise, to ferment vine and used in formation f cheese.
Harmful Effects:
Some fungi are pathogenic to humans and animals
and cause fungal infections and allergies.
Fungi produce toxins such as ergot
alkaloids and aflatoxins.
Some fungi release toxic chemicals called
mycotoxins that can result in poisoning or death.
Various fungi can also cause serious damage
to harvested fruits, vegetables and other crops.
Morphology of Fungi:
Fungi can be divided into two basic
morphological forms;
Unicellular Fungi
Yeast are unicellular fungi which reproduce asexually by budding or
fission.
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