New record of Circinella muscae from a hydrocarbon polluted sand beach of Tabasco, Mexico

Author： González María C. Murueta-Figueroa Nayeli Medina-Ortiz Cristina Hanlin Richard T.

ISSN： 2154-8889

Source： Mycotaxon, Vol.113, Iss.1, 2010-07, pp. : 111-117

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Abstract

During a survey of fungal biodiversity from Mexican sand beaches, an uncommon fungus of the subphylum Mucoromycotina was isolated from the intertidal area of Playa Paraiso, State of Tabasco. A study of culture isolates demonstrated that it is a mucoraceous species belonging to the genus Circinella characterized by sporangiophores bearing circinate branches terminated by globose sporangia with persistent sporangial walls. Several sandy soil samples placed in sterile re-sealable plastic bags were processed in the laboratory within 4 h. Plates of corn meal agar inoculated with 0.5 g of sandy soil were incubated 15 d. The fungus produced sympodially branched sporangiophores with fertile circinate branches bearing one or two sporangia, or a single sporangium and a sterile spine. Sterile spines were light in color and the globose sporangia had persistent walls bearing globose, hyaline sporangiospores. The characters of the Mexican isolate agree with those described for C. muscae. Few zygomycete studies have been conducted in Mexico, making this the first recorded mucoraceous fungus isolated from a sand beach environment in the country.