The fungi reproduce by spores. Spores is a minute reproductive of Propagative functioning as a seed of fungi. These are produced in three ways. Asexual spores form without nuclear fusion or act of breeding. These spores borne of sporophores. They are not usually resistance to unfavourable conditions.
They are capable of rapid multiplication.
They may be one or many celled borne on specialized hyphae or produced in special structures called as spores fruits. These spores are formed internally within sac by the division of protoplasm. Sporangiospores are produced in a sac or sporangium and are hvalineunicellular. These spores are liberated by breaking the wall of sporangium. When sporangium gives motile spores, it is known as zoosporangium or swarsporangium and the spores as zoospores or swarmspores.
These spores are motile by means of flagella. A non motile spore produced in the sporangium is knows as Aplanospore. These spores are borne externally on sporophores. These spores are produced on sepecialized hyphae or stock. Conidia differ in their size, shape, colour, septation and branching within the same species. Conidia may be uni or multicellular, hyaline or coloured.
These spores are barrel shaped or rectangular in shape and are produced asexually in chains on the stalk called as oidiophore. Oidia in powdery mildew. The sexual spores are formed by the fusion between two gametes of opposite sec. Cell carrying the gamete is called gametangium and gamete is unisexual or haploid. It is the result of union between female gametes i. Oogonium and male gametes i. Anthridial nuclei passes to Oogonium through fertilization
Types of asexual spores formed by fungi. Oogonium is larger than Antheridium and is oval or irregular shaped.
The Oospores are thick walled and may be smooth or rough, dark in colour. These spores can resist the adverse conditions. of sub-division Mastigomycotian. The resultant spore is thick walled or spiny.
The wall consists of two layer. Outer one is known as exosporium and inner layer as endosporium. These spores resist unfavourable conditions and germinate during favourable season. Fungi of Sub-division Zygomycotina. It is form by union of to opposite haploid motile gametes. Lower fungi of the subdivision Mastigomycotian. It is a result of Types of asexual spores formed by fungi between female gametes.
Ascogonium and male gamete. Anthridial nuclei passes to Oogonium through trichogyne. Ascospores Types of asexual spores formed by fungi be single or many celled, hyaline or coloured and having various shapes. Fungi of sub-division Ascomycotina. These are the sexual spores produced on club shaped structure known as basidium on a short stalk o tube known as sterigmata. They are produced exogenously and usually four in number.
Motile, e.g. Zoospores, b. Asexual spores form without nuclear fusion or act of breeding. Spores: There are three types of spores: 1) Asexual: i) Endogenous: a. Motile, e.g. Zoospores, b. Asexual spores form without nuclear fusion or act of breeding.
Because of their stationary life style, fungi reproduce by forming spores, cells that are Asexual spores include sporangiospores and conidia, whereas sexual.