The effect of plant growth regulators on centaury (Centaurium erythraea Rafn) seeds germination

Centaury seeds are light-requiring. Long-term red light irradiation caused more than 80% of seeds to germinate. Seeds did not germinate in darkness. Gibberellic acid and GA7 can replace light, but N-substituted phtalimide AC 94,377 was ineffective. Light-induced germination was inhibited by abscisic acid and growth retardants such as ancymidol, tetcyclacis, and paclobutrazole. Growth retardant-caused inhibition can be overcome by the addition of gibberellic acid.

Effect of AC 94,337 on Young Grain Sorghum (Sorghum bicolor) and Rotational Crops

Greenhouse experiments were conducted to determine effects of AC 94,377, seed depth, and commercially applied seed protectants on emergence and early growth of grain sorghum. Mean height of grain sorghum was increased by 500 to 2000 ppmw AC 94,377 but not by 250 ppmw. Emergence and fresh weight of grain sorghum was not affected. Plants arising from seeds without protectants were taller and heavier than those with protectants intact. Soybean sown in soil containing AC 94,377 at 0.6 to 2.5 kg ai/ha was injured; however, soybean grew normally if seeds were not sown until at least 1 week after applying AC 94,377. Cotton was not injured by AC 94,377.