Dormancy and Seed Germination of Plant Species

This research studies dormancy and seed germination of four different plant species of the family Leguminosae which includes, Centrosama pubescens, Sesbania sesban. Sesbania rostrata and Clitoria ternatea were carried out.

This involves the use of dormancy-releasing methods like the use of the chemicals; Sulphuric Acid (H₂ SO₄ ), Hydrogen Peroxide (H₂ O₂), Ethanol (C₂ H₅ OH), Methanol (CH₃ OH), and Potassium nitrate (KNO₃), Hot water treatment, and hormones like Gibberellins and Kinetin. The preliminary germination test on intact seeds in hot water for two minutes before germination for Centrosena pubescens and Sesbania sesban and fifteen minutes for Clitoria ternatea and Sesbania rostrata recorded the highest percentage of germination when compared to the control.

Treatment of intact seeds with chemicals especially sulphuric acid and hydrogen peroxide was more efficient in breaking seed dormancy while the use of kinetin as a hormone has an edge over gibberellins in the breaking of seed dormancy. The presence of cuticles, macrosclereids and osteosclereids which are impermeable to water and gas immensely contributed to the high level of dormancy in the seeds as seen in the research.

The information gathered in this research will go a long way in eradicating or tackling the problems of dormancy or improving the propagative methods of most forest plants. All these will help the foresters to have access to producing the seedlings to meet the population demands.

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