Reproduction, asexual vegetative

The vegetative body is a thallus. It consists of filaments about 5 pm in diameter which are multi-branched or spread over or into the nutrient medium. The filaments or hyphae, can be present without cross walls as in lower fungi or divided into cells by septa in higher fungi. The total hyphal mass of the fungal thallus is called the mycelium. In certain situations during transition between asexual and sexual reproduction, various other tissue structures are formed, e.g. plectrenchyma (mushroom flesh). 

Spore A uni- or multicellular, asexual, reproductive, or resting body that is resistant to unfavorable environmental conditions, and which produces a new vegetative individual when the environment is favorable. 

Protozoa are unicellular organisms with a well-defined cell nucleus. Some species are capable of sexual reproduction, while others reproduce asexually. In addition to their vegetative (usually motile) forms, most protozoa also develop cysts as a permanent state under unfavourable external conditions. They move with the aid of flagella or cilia, by amoeboid locomotion, or in a winding, gliding manner. 

Reproduction is the power possessed by an organism of giving rise to new individuals. This may take place through the agency of either asexual or sexual cells and is accordingly asexual or sexual in character. Whenever a union of cells or their protoplasmic contents takes place the process is called sexual reproduction if, however, there is a mere separation of a cell or cells from an individual which later form a new organism, the process is termed asexual or vegetative reproduction. ... 

Malaria is transmitted by the bite of an infected Anopheles mosquito that introduces the sporozoites (tissue parasites) of the plasmodia P. falciparum, P. vivax, P. malariae, and P ovale) into the bloodstream. The asexual reproduction stage develops in humans, whereas the sexual stage occurs in the mosquito. The sporozoites invade parenchymal hepatocytes, multiply in stages referred to as exoery-throcytic stages, and become hepatic vegetative forms or schizonts. Schizonts rupture to release daughter cells, or merozoites, that then infect erythrocytes. 

A common mode of asexual reproduction is for portions of vegetative mycelium to thicken and form heavy walls and septae. These reinforced hyphal fragments then break apart and are distributed by natural processes. These vegetative propagules are called by many names, including ar-... 

Lichen fungi are able to reproduce sexually, as well as asexually. The relative frequency of sexual and vegetative propagation is species specific however, examples of species are known which reproduce sexually on one continent and asexually on another ( species pairs, Poelt, 1970). Few genera of lichen fungi are exclusively asexual, most are either exclusively sexual or possess a mixed reproductive strategy (Bowler and Rundel, 1975). Sexual lichen fungi reproduce with microscopic... 

The typical vegetative structure of mold consists of individual hyphal elements (collectively called the mycelium). Hyphae are of three types (1) penetrative hyphae called rhizoids which serve to enter the substrate and glean and transport nutrient (2) stolons, of larger diameter than rhizoids, which serve to link the mycelial mass, and (3) aerial asexual reproductive hyphae, the conidiospores or sporangiosphores. Depending on the organism, asexual spores may be produced within a enclosed structure, the... 

The word clone derives from the Greek term klon that means twig or branch , and refers to the asexual or vegetative reproduction from a single origin. In viticulture,... 

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