Bio-Activity Investigations of Extracts of Different Parts of Lumnitzera littorea Voigt

Abstract

Plants are a great source of potentially beneficial chemical compounds. They produce a wide variety of substances that are used for biological functions and for preventing diseases caused by pathogens, fungi and other sources. Traditionally, it has been a common practice to treat microbial infections such as whooping cough, or skin ailments, and inflammations with crude extracts or decoctions derived from plants. However, there has been information of phenolic or flavonoid acting as bioactive substance but none of an obvious experimental result to determine the type of bioactive substance helping to treat the symptoms. Several previous works reported that different parts of plants including bark, leaves, fruits, flowers, and seeds have phytochemical constituents with a variety of pharmacological properties. 1-4 These phytochemicals contain naturally bioactive compounds that are formed during a plant's normal metabolic processes and which are often referred to as secondary metabolites. These metabolites commonly include alkaloids, terpenoids, tannins, saponins, phenolics and flavonoids. These are widely used as lipase inhibitors, antioxidants and antimicrobial agents. 1-6 To identify bioactive compounds, phytochemical screening is the first and important step in isolating the type of secondary

Effect of extraction solvents on phenolic compounds and flavonoids from Pongame oiltree (Derris indica [Lamk.] Bennet) aerial parts and their growth inhibition of aquatic pathogenic bacteria

“…There have been several reports on the antibacterial properties of compounds isolated from the bark, root and stem of D. indica (Khan et al, 2006;Koysomboon et al, 2006;Rao et al, 2009;Badole et al, 2011). Another more recent report showed that the change in the chemical composition of each extract directly affected its bioactivity and characteristic of bioactive compounds are important in providing access across the cell walls of bacteria (Vittaya et al, 2020). 7).…”

“…(Abeysinghe, 2010). More evidence was reported on the methanolic extracts of R. macronata against A. hydrophila and Escherichia coli (Mahmiah et al, 2018) and the methanolic extracts of the Black mangrove (Lumnitzera littorea) on S. agalactiae, A. hydrophila, V. harveyi and V. parahemolyticus (Vittaya et al, 2020). Despite these previous attempts, there is still a need to explore new herbs as alternatives to replace antibiotic uses in aquaculture.…”