Agaricus chionodermus Pilát, a species new to Bulgaria

The article presents the first record of Agaricus chionoderma Pilát in Bulgaria. Basidiomata of the species were found on June 2004, September 2010, and September 2011 in the Thracian Lowland floristic region. The article brings closer taxonomic profile, ecological requirements and distribution pattern of the species. Differences from similar species are discussed. It also describes macroscopic and microscopic characteristics of the discovered specimens and presents the specification of habitat the fungus concerned. The species are described and illustrated by photographs of macroscopic and microscopic features on the basis of Bulgarian specimens

Agaricus chionodermus Pilát, a species new to Bulgaria

The article presents the first record of Agaricus chionoderma Pilát in Bulgaria. Basidiomata of the species were found on June 2004, September 2010, and September 2011 in the Thracian Lowland floristic region. The article brings closer taxonomic profile, ecological requirements and distribution pattern of the species. Differences from similar species are discussed. It also describes macroscopic and microscopic characteristics of the discovered specimens and presents the specification of habitat the fungus concerned. The species are described and illustrated by photographs of macroscopic and microscopic features on the basis of Bulgarian specimens

GC-MS studies of the chemical composition of two inedible mushrooms of the genus Agaricus

<p>Abstract</p> <p>Background</p> <p>Mushrooms in the genus <it>Agaricus </it>have worldwide distribution and include the economically important species <it>A. bisporus</it>. Some <it>Agaricus </it>species are inedible, including <it>A. placomyces </it>and <it>A. pseudopratensis</it>, which are similar in appearance to certain edible species, yet are known to possess unpleasant odours and induce gastrointestinal problems if consumed. We have studied the chemical composition of these mushrooms using GC-MS.</p> <p>Results</p> <p>Our GC-MS studies on the volatile fractions and butanol extracts resulted in the identification of 44 and 34 compounds for <it>A. placomyces </it>and <it>A. pseudopratensis</it>, respectively, including fatty acids and their esters, amino acids, and sugar alcohols. The most abundant constituent in the volatiles and butanol were phenol and urea respectively. We also identified the presence of ergosterol and two Δ⁷-sterols. In addition, 5α,8α-Epidioxi-24(ξ)-methylcholesta-6,22-diene-3β-ol was isolated for the first time from both mushrooms. Our study is therefore the first report on the chemical composition of these two species.</p> <p>Conclusion</p> <p>The results obtained contribute to the knowledge of the chemical composition of mushrooms belonging to the <it>Agaricus </it>genus, and provide some explanation for the reported mild toxicity of <it>A. placomyces </it>and <it>A. pseudopratensis</it>, a phenonomenon that can be explained by a high phenol content, similar to that found in other <it>Xanthodermatei </it>species.</p

A case study on wood-decaying macrofungi in the Southwestern slopes of Vasilyovska Mountain, Forebalkan, Bulgaria

<p>This study was performed based on specimens of macrofungi collected on field trips to the region<br>between 2007 and 2011. The aim of this study was to determinate the wood-decaying macrofungi of<br>Vasilyovska mountain, to enrich the information about fungal diversity in the Forebalkan floristic<br>region, and make contribution to Bulgarian mycota. The information upon species composition and<br>distribution of wood-decaying macrofungi in the Vasilyovska mountain were published for the first time including the second records of Armillaria ostoyae, Pholiota lucifera and Xeromphalina cauticinalis in the country. A list of 110 species belonging to Pezizomycota and Agaricomycota has been compiled which 75 species were reported for the first time from Forebalkan. Four species includes in the Red List of fungi in Bulgaria: Fomitopsis rosea (Alb. & Schwein. : Fr.) P. Karst., Hericium coralloides (Scop. : Fr.) Pers., H. erinaceus (Bull. : Fr.) Pers., and Lenzites warnieri Durieu & Mont.</p