Biochemical Systematics and Ecology 28 (2000) 89 } 90 Short communication Di!erent volatile compounds from mycelium and sporocarp of Pleurotus ostreatus William F. Wood*, George R. Farquar, David L. Largent Department of Chemistry, Humboldt State University, Arcata, CA 95521, USA Department of Biological Sciences, Humboldt State University, Arcata, CA 95521, USA Received 4 December 1998; accepted 17 February 1999 Keywords: Pleurotus ostreatus; Agaricaceae; Agaricales; 4-methoxybenzaldehyde; 1-octen-3-ol 1. Subject and source A dikaryotic straw culture of Pleurotus ostreatus (Jacq. ex Fries) Kummer (Agaricales, Tricholomataceae), K-200, was obtained from Fungi Perfecti, Olympia, Washington, USA. 2. Previous work Volatile compounds from sporocarps of P. ostreatus have been the subject of several studies (Ahn and Lee, 1987; Beltran-Garcia et al., 1997; Dijkstra, 1976) which showed 1-octen-3-ol as the major compound. 4-Methoxybenzaldehyde has previously been identi"ed in mycelial cultures of the wood-rotting fungi Trametes suaveolens L.: Fr. (Birkinshaw et al., 1944) and Ischoderma resinosum (Fr.) Karst. [ "Polyperous ben- zoinus (Whalb.) Fr.] (Birkinshaw et al., 1952). 3. Present study Gas chromatography-mass spectrometry (GC-MS) of concentrated (100 to 1) ether extracts from crushed sporocarps of P. ostreatus from the straw culture showed * Corresponding author. Tel.: 707-826-3109; fax: 707-826-3279 E-mail address: wfw2@axe.humboldt.edu (W.F. Wood) 0305-1978/99/$ - see front matter 1999 Elsevier Science Ltd. All rights reserved. PII: S 0 3 0 5 - 1 9 7 8 ( 9 9 ) 0 0 0 3 1 - 9