Abstract
1. When the timothy seeds were planted on the cotton moistened with the solution of sodium para-amino salicylate (10mg/cc), pyrazinamide (900γ/cc), or isonicotinic acid hydrazide (500γ/cc), their germinating ability and leaf growth would be disturbed remarkably, but the chlorophyll formation was not disturbed.
2. Even when the seeds were soaked in the solution of sodium para-amino salicylate (100mg/cc), pyrazinamide (9mg/cc), or isonicotinic acid hydrazide (5mg/cc) for 4 days at 5°C, no toxic effect appeared in their germinating ability and leaf growth, when they were growing on the cotton moistened with pure water after being separated from the drugs.
The author is indebted to Dr. Hideo Moriyama, the director of this institute, for his many valuable advices and encouragements.
