The influence of different media on the Laetiporus sulphureus (Bull.: Fr.) Murr. mycelium growth MAREK SIWULSKI1*, MAŁGORZATA PLESZCZYńSKA2, ADRIAN WIATER2, JING-JING WONG3, JANUSZ SZCZODRAK2 1Department of Vegetable Crops Poznań University of Life Sciences Dąbrowskiego 159 60-594 Poznań, Poland 2Department of Industrial Microbiology Institute of Microbiology and Biotechnology Maria Curie-Skłodowska University Akademicka 19 20-033 Lublin, Poland 3Southwest Forestry University Kunming Yunnan China *corresponding author: phone: +4861 8487974, e-mail:
[email protected] S u m m a r y The aim of the research was to determine the effect of medium on the mycelium growth of L. sulphureus. The subject of the studies were six L. sulphureus strains: LS02, LS206, LS286, LS302, LSCNT1 and LSCBS 388.61. Eight different agar media and six solid media were used in the experiment. Some morphological characteristics of mycelium on agar media were also evaluated. It was found that PDA was the best agar medium for mycelium growth of all tested strains. The strain LS302 was characterized by very high growth rate regard- less of the examined agar medium. The tested strains presented changes in mycelium morphology on different agar media. The best mycelium growth was obtained on alder, larch and oak sawdust media, mainly in LSCBS 388.61, LS02 and LS286 strains. Key words: Laetiporus sulphureus, mycelia growth, agar media, sawdust media The influence of different media on the Laetiporus sulphureus (Bull.: Fr.) Murr. mycelium growth 279 INTRODuCTION Laetiporus sulphureus (Bull : Fr ) Murril belongs to the class Aphyllophorales (Poly- pore) fungi. It has been reported as cosmopolitan polypore fungus that causes brown rot in stems of mature and over-mature old-growth trees in forests and urban areas from boreal to tropical zones [1].