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Mucor spores or sporangiospores can be simple or branched and form apical, globular sporangia that are supported and elevated by a column-shaped columella. Mucor species can be differentiated from molds of the genera Absidia , Rhizomucor , and Rhizopus by the shape and insertion of the columella, and the lack of stolons and rhizoids .
The identification of this species is not problematic after sporulation event because of its characteristic flask-shaped sporangium with spherical venter and a distinct dome-shped columella and dichotomously branched rhizoid complex. [3] [6] On top of the venter, there is a neck with closed apex with a mucilaginous plug. [6]
A columella (pl. columellae) is a sterile (non-reproductive) structure that extends into and supports the sporangium of some species. In fungi, the columella, which may be branched or unbranched, may be of fungal or host origin. Secotium species have a simple, unbranched columella, while in Gymnoglossum species, the
The sporangium has an operculum, epiphragm, columella, sporangial jacket, a spore bearing layer, and nematodontous teeth. Nematodontous teeth are composed of whole, thickened dead cells. [ 10 ] Although nematodontous teeth are not hygroscopic , [ 11 ] they may aid in spore dispersal through small movements (they do not move much). [ 9 ]
Backusella; Sporangium (i.e. a cluster of sporangiospores surrounding a columella (obscured in image by sporangiospores) subtended by a hypha) viewed with bright-field light microscope
The term columella is also used to refer to story 1 to story 4 (S1 – S4) cells in the root cap, located apically of the quiescent centre. [citation needed] In vascular plants, columella tissue helps the roots to perceive gravity. Within columella cells, the amyloplasts and Golgi apparatus organelles tend to fall to the bottom third of the ...
Just as with labels on cigarettes, America's top doctor is calling for cancer risk warnings on alcohol after a report cites studies linking alcoholic beverages to more than a half-dozen ...
In Pilobolus, contact with the surface causes a rupture at the columella, which releases the sporangium, which adheres to the new surface. In Utharomyces, contact with the surface ruptures the subsporangial swelling. This releases cytoplasm, which is used to glue the upper portion of the swelling containing the sporangium to the substrate. [2]