Dec 29, 2009

Asexual Reproduction in Rhizopus

Asexual reproduction takes place by the production of large number of spores within the sporangia. Immature sporangia are white while mature are black. The spores are thick-walled and non-motile. Each sporangium is borne on a sporangiophore. The tip of the sporangiophores swells and many nuclei migrate to this swelling. The central portion of the sporangium becomes separated from the peripheral zone by the deposition of the dome shaped wall. This doom-shaped wall is called columella. Numerous spores are formed within the sporangium. The outer wall of the sporangium breaks down and spores are displaced by air currents. On a suitable spore germinates and develops into new hyphae.


                          
                                Asexual Reproduction in Rhizopus



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