SELECTED SCARIFICATION TREATMENT EFFECTS ON SEED GERMINATION

ABSTRACT

There are currently no reported studies conducted on the germination requirements of both Pararistolochia triactina and Thespesia garckeana seeds. This study investigated the impact of three scarification treatments on the germination of Pararistolochia triactina and Thespesia garckeana seeds. The scarification treatments, include: hot water (100oC), dry heat and three dilutions of sulfuric acid (50 ml, 75 ml, 125 ml) made up to 500ml of tap water were applied to the seeds, while freashly harvested untreated seeds served as the control group. No evidence was demonstrated on the significant effects of scarification on the germination of either species. Germination percentages, germination times, and seedling vigor were similar in both the scarified seeds and the untreated control group. The lack of response to scarification treatments suggests that scarification may not be required in the breaking of seed dormancy or enhancing germination in the tested plant species. Possible explanations for these inconclusive results include the natural permeability of the seed coats of Pararistolochia triactina and Thespesia garckeana, which may allow water and gases to penetrate without the need for scarification. Additionally, other physiological or environmental factors may exert stronger control over seed germination in these species. Investigating different scarification techniques, assessing the influence of environmental factors, and evaluating the viability of aged seeds could provide additional insights into enhancing germination in these species. This study yielded inconclusive results regarding the effect of scarification on the germination of Pararistolochia triactina and Thespesia garckeana seeds. Scarification may not be necessary for promoting germination in these species. Future research should focus on alternative methods to improve germination and gain a deeper understanding of the physiological factors influencing seed dormancy in Pararistolochia triactina and Thespesia garckeana. Further research is needed to better understand the germination mechanisms of Pararistolochia triactina and Thespesia garckeana seeds and explore alternative methods for breaking seed dormancy.