Abstract
Mycelial growth of some wood‐rotting fungi was studied on a solid modified medium MS (Murashige and Skoog, 1962) with indole‐3‐acetic acid at concentrations of 10‐6 to 10‐3 M. The IAA concentrations of 10‐6 M and 10‐5 M inhibited mycelial growth of the fungus Phaeolus schweinitzii, Laetiporus sulphureus and Pleurotus ostreatus while the same concentrations stimulated mycelial growth of the fungus Stereum rugosum. The IAA concentrations of 10‐6 M stimulated mycelial growth in Piptoporus betulinus and temporarily stimulated mycelial growth in Heterobasidion annosum. The IAA concentration of 10‐4 M appeared critical for wood‐rotting fungi. The IAA concentration of 10‐3 M inhibited mycelial growth in all the fungi under study.
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