Abstract

MATA, Gerardo et al. First report of wild Agaricus bisporus (Basidiomycota, Agaricaceae) from Tlaxcala and Veracruz, Mexico. Rev. Mex. Biodiv. [online]. 2016, vol.87, n.1, pp.10-17. ISSN 2007-8706.  https://doi.org/10.1016/j.rmb.2016.01.019.

The fungus commonly known as white button mushroom, Agaricus bisporus, is the most commercially cultivated species among edible ones worldwide. In spite of its importance, its presence in wild stage had not been confirmed even when it has been included in lists of species from different states of Mexico. The aim of this study was to determine if this species grows wild in Mexico. Collections were made in the states of Tlaxcala and Veracruz, where 7 strains were isolated from wild specimens. Basidiomes of these strains were grown in commercial compost-based substrate. Wild specimens, deposited at XAL Herbarium, and those obtained in culture were studied macro and micro morphologically. IE 623 strain was used to obtain the DNA ITS ribosomal sequence. The revised specimens match morphologically with A. bisporus and have an average of 63.4% of bisporic basidia. The DNA sequence confirmed the taxonomic identity and through similarity and phylogenetic analysis, it was concluded that the strain derived from a wild specimen and not from a commercially cultivated strain. Native strains of A. bisporus from Mexico could provide important germplasm to improve its commercial cultivation.

Keywords : Wild white button mushroom; Native germoplasm; Bisporic-basidia; Edible mushrooms.

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