Germinability Enhancement and Protective Potentials of AnnonaSenegalensisLeaf Extract on Sorghum Seeds

Oghenerobor Benjamin Akpor

Department of Biological Sciences, Landmark University, Omu-Aran, Kwara State, Nigeria

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Medicinal plants are predominantly found in nature.They are cultivated worldwide on commercial scale. This study aims at assessing the protective potential of leaf extracts of Annonasenegalensis against selected fungal pathogens of sorghum seeds. Before the seeds are used, they are checked for viability and their surface sterilized. In this study, the effective concentration, optimum soaking time, protective potential of the extract and antibacterial effect of the extracts are carried out. During each setup, at the end of the planting period, percentage germination, germination index, germination capacity, germination rate, germination time and seed vigour are calculated. The most effective concentrations of the aqueous, N-hexane, ethanolicextracts of Annonasenegalensis and copper sulphate solution are observed to be 2000 mg/L, 7000 mg/L, 2000 mg/L and 5000 mg/L respectively.The best soaking times of the seeds in the copper sulphate solution, aqueous and N-hexane extracts of Annonasenegalensisare 30 min while for ethanolic extract was 60 min. The infected seeds that are treated with the extracts show high level of germination and seed vigour. The antibacterial potential of the extracts is tested against selected bacterial pathogens. A high level of inhibition is observed in the ethanolic extract. This study reveals the potential of Annonasenegalensisin the enhancement of germination and seedling vigour as well as the protective effect against fungal pathogens. The findings in the study can be exploited to control the growth of storage or spoilage fungi thus reducing the dependence on the synthetic fungicides

Keywords: Annonasenegalensis, Germination, Pathogens, Sorghum seed, Spoilage.

About the Presenter

DrOghenerobor Benjamin Akpor is an Associate Professor in the Department of Biological Sciences, Landmark University, Nigeria. He holds B.Sc and M.Sc degrees in Microbiology from the NnamdiAzikiwe University, Awka and the ObafemiAwolowo University, Ile-Ife, in 1999 and 2004, respectively. His doctoral degree is in the field of Water Care from the Tshwane University of Technology, Pretoria, South Africa in 2009.

His research experiences have culminated in publication of numerous articles in peer-reviewed journals and several oral and poster presentations in local and international conferences. He serves as publishing editor of several journals. His current research interests are in the areas of biological wastewater treatment and water quality management.