A Special Problem Outline Presented to
The Faculty of the Department of Biological Sciences
College of Arts and Sciences
Central Luzon State University
In Partial Fulfillment of the
Course Requirement in
Animal Physiology (Bio255)
For the Degree of
Bachelor of Science in Biology
October 2013
CHAPTER I
INTRODUCTION
Background of the study
Derris eliptica (Wallich) Benth belongs to family Fabaceae characterized as a climbing vine and are widely available in tropical regions (Akinbulumo, et al.) like Philippines. It is described by its pinnate leaves and usually oblong leaflets thriving up to 1500m above sea level. It is known as leguminous cultivated for insecticidal property from of rotenone it possessed. (Pongslip and Leelahawonge, 2009). The pounded roots of D. eliptica is considered the strongest fish-poison in the South East Asia and also used in fisheries in the Philippines.
However, there was least study of its phytochemical property. Some studies reported the anti-oxidant activity of the D. eliptica (Palasuwa, et al,2005) larvicidal activity (Komalamisra, et al, 2005) and Heinz body inhibition activity (Palasuwa, et al, 2005). It has also been used in traditional medication to cure scabies and breast sickness, to stop bleeding and as a purgative. (Khan, et al, 2006)
Like other legumes, D. eliptica can be nodulated by specific group of bacteria subsequently providing nitrogen for the plants and reducing the need for costly artificial fertilizer (Ponsilp and Boonkerd, 2007). Recent studies reported this plant as nitrogen-fixing symbionts legumes however the properties of D. eliptica specifically its leaves were known. Hence this study aims to examine the antimicrobial activity of D. eliptica leaves in hot water extract and ethanol extract.
Review of Related Literature
The use of plant, plant extract or chemical derived from