Abstract
Boesenbergia rotunda (L.) Mansf. is one of the unique monocotyledonous perennial plant species belonging to the ginger (Zingiberaceae) family. Locally known as ‘Temu Kunci’ in Malaysia and Indonesia, this medicinal plant has been widely used in Asian dishes, particularly as a condiment or as traditional natural medicines. The important medicinal properties of B. rotunda majorly derived from flavonoids which are highly sought as pharmaceuticals. In this study, culture conditions for the growth of adventitious roots in liquid suspension cultures were optimized. The highest adventitious root production was achieved when cultured with initial inoculum density of 1.5 g and pH value at 5.8 after five weeks of culture. HPLC analysis discovered that production of valuable flavonoid compounds (pinostrobin, cardamonin and panduratin A) was significantly higher when the adventitious roots were cultured with initial inoculum density of 1.5 g whereas the initial pH medium did not significantly affect flavonoid production.
Highlights
The growth data were presented in the form of mean fresh weight (FW) and dry weight (DW)
Production of important plant secondary metabolites from the in vitro adventitious roots is highly dependent on the initial inoculum density and differs by the plant species (Gonçalves and Romano, 2018)
This study reported declining in flavonoid contents as the initial inoculum density increased, 1.0 g to 2.0 g with only 2.9 mg RE/g DW and 2.7 mg RE/g DW, respectively
Summary
Plants are essential to live organisms providing a source of nutrients and oxygen for continuance survival (Usman et al, 2014). Plants that entail with medicinal properties have been the ultimate source of healing for humans for thousands of years. These medicinal plants are used as traditional medicines and serve as the ultimate base for modern drugs and a wide range of natural health products globally (Newman and Cragg, 2012). The demand for medicinal plants is universally elevated due to the renaissance of interest in herbal medicines-based phytochemicals. This is due to safer option compared to synthetic modern drugs, lower in cost, easy access due to the availability of these plants (Shewamene et al, 2017)
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