Effects of plant growth regulators on three wood-rotting polypores

The results of the effects of plant growth regulators, kinetin, gibberellic acid, 3-indoleacetic acid and ethrel (2-chloroethylphosphonic acid) on three wood-rotting polypores,viz. Polyporus palustris, Daedalea flavida andTrarnetes badia, are given. 3-Indoleacetic acid, kinetin and gibberellic acid increased the dry mass and protein, and decreased free amino acids, while ethrel decreased dry mass and protein, and increased free amino acids inP. palustris. All the treatments decreased dry mass and protein, and increased free amino acids inD. flavida. Kinetin decreased dry mass and protein, and increased free amino acids whereas 3-indoleacetic acid, gibberellic acid and ethrel increased dry mass and protein, and decreased free amino acids inT. badia over the control. The effects were most pronounced in the three species upon treatment with 50 μm kinetin, 50 μm gibberellic acid, 50 μm 3-indoleacetic acid and 25 μm ethrel. Among the treatments, the effects of 3-indoleacetic acid were most marked in enhancing growth, measured by dry mass ofT. badia out of the three species studied.