|Schematic diagram of Rhizopus spp.|
Rhizopus is a genus of common saprobic fungi on plants and specialized parasites on animals. They are found on a wide variety of organic substrates, including "mature fruits and vegetables", jellies, syrups, leather, bread, peanuts and tobacco. Some Rhizopus species are opportunistic agents of human zygomycosis (fungal infection) and can be fatal. Rhizopus infections may also be a complication of diabetic ketoacidosis. This widespread genus includes ten species.
Rhizopus species grow as filamentous, branching hyphae that generally lack cross-walls (i.e., they are coenocytic). They reproduce by forming asexual and sexual spores. In asexual reproduction, sporangiospores are produced inside a spherical structure, the sporangium. Sporangia are supported by a large apophysate columella atop a long stalk, the sporangiophore. Sporangiophores arise among distinctive, root-like rhizoids. In sexual reproduction, a dark zygospore is produced at the point where two compatible mycelia fuse. Upon germination, a zygospore produces colonies that are genetically different from either parent.
- R. arrhizus causes fruit rot on apples.
- R. artocarpi causes fruit drop of jack fruit.
- R. nigricans (bread mold) grows on spoiled food.
- R. oligosporus is used to make tempeh, a fermented food derived from soybeans.
- R. oryzae is used in the production of alcoholic beverages in parts of Asia and Africa.
- R. stolonifer (black bread mold) causes fruit rot on strawberry, tomato, and sweet potato and used in commercial production of fumaric acid and cortisone.
- "Rhizopus Ehrenb. 1820". MycoBank. International Mycological Association. Retrieved 2011-02-05.
- Kirk PM, Cannon PF, Minter DW, Stalpers JA. (2008). Dictionary of the Fungi (10th ed.). Wallingford, UK: CABI. p. 599. ISBN 978-0-85199-826-8.
- Chinn RY, Diamond RD. (1982). "Generation of chemotactic factors by Rhizopus oryzae in the presence and absence of serum: relationship to hyphal damage mediated by human neutrophils and effects of hyperglycemia and ketoacidosis". Infection and Immunity 38 (3): 1123–29.
- Zheng RY, Chen GQ, Huang H, Liu XY. (2007). "A monograph of Rhizopus". Sydowia 59 (2): 273–372.
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