Abstract
1. Further studies on the growth promoting substance excreted by “Bakanae” fungus were carried out in its extractive nature and its effect on some other plants, not rice-plant.
2. The extraction-experiments were made on the following materials (1) the filtrate which was dried up by gentle heat, (2) the animal black which adsorbed the substace, and (3) the animal black which adsorbed the substance passed through a semipermeable membrane. From the material (1), the substance was extracted by distilled water, alcohol, ether, aceton and chloroform, and from the materials (2) and (3), it can not be extracted by distilled water. As a whole, the growth promoting substance is extractable by some solvents after various treatments, approaching to the relatively pure state.
3. By the action of the alcohol extracted substance from the filtrate, the seedlings of wheat, barley, Indian corn, Azuki bean and soy bean also grew taller than normal.
