Effects of Hormones-treated Seeds on Germination and Seedling Growth in Marigold (Tagetes erecta L.)

In order to improve the germination rate and seedling growth in marigold,seeds were treated with cytokinin and plant growth regulator "gold potassium 920".The results showed that highest germination potential and germination rate of 78.3% and 85.0% were obtained in 0.15% cytokinin treatment.Different hormone treatments had a certain role in promoting plumule growth,with 47.1% higher in 0.15% cytokinin treatment compared to CK treatment.With increasing concentration of both hormones,radicle growth showed a downward trend.0.20% of the "gold potassium 920" treatment had the most significant inhibition on radicle growth,which was 38.3% lower than CK treatment.Hormone treatments also had promoting effects on marigold seedling fresh weight and dry weight,with an exception of 0.10% "gold potassium 920" treatment which had no difference compared to CK.0.20% cytokinin treatment had the maximum value of fresh weight and dry weight,which was 36.4%,35.3%,higher respectively than CK treatment.