EFFECT OF POLYCULTURE CULTIVATION SYSTEM AND ADDITION OF ABSCISIC ACID (ABA) ON ENHANCEMENT OF STARCH AND PROTEIN CONTENT FROM DUCKWEED (Landoltia punctata, Lemna aequinoctialis, AND Wolffia arrhiza)

• Main Author: Awal Sembada (11214003), Anca
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/25483
• Institution: Institut Teknologi Bandung

Duckweed is one of the plant groups that are potential to produce biomass and can <br /> <br /> be used as an alternative source of protein. Duckweed can also be used as a raw <br /> <br /> material for bioethanol production as it can accumulate starch. This research <br /> <br /> aimed to increase the content of starch and protein from duckweed by developing <br /> <br /> mono- and polyculture cultivation systems and addition of abscisic acid (ABA). <br /> <br /> Polyculture cultivation system involved a combination of two or three species, <br /> <br /> whereas ABA treatment was performed by adding ABA with concentrations of 0, <br /> <br /> 10-3, 10-4, and 10-5 mg/L in Hoagland medium. Growth kinetics such as specific <br /> <br /> growth rate and doubling time was measured during the cultivation. Measurement <br /> <br /> of starch and protein content was performed at the end of the cultivation. The <br /> <br /> results showed that the polyculture cultivation system and the addition of ABA have <br /> <br /> no significant effect on the specific growth rate and doubling time of duckweed. <br /> <br /> However, treatment with 10-3 mg/L ABA resulted in increasing starch content by <br /> <br /> 1,8 fold or 18,604 ± 0,109%. Polyculture cultivation system also increased the <br /> <br /> protein content by 1,3 fold or 15,579 ± 0,319%. Thus, a polyculture as well as <br /> <br /> addition of high concentration of ABA should be opted to increase the starch and <br /> <br /> protein content of duckweed.