Fiddy Semba Prasetiya, Donna Siti Ramdhani, Yeni Mulyani, Mochamad Untung Kurnia Agung, Sulastri Arsad, Jean-Luc Mouget
Among marine diatoms, Haslea ostrearia has a peculiarity in releasing a water soluble blue-green pigment called marennine. This pigment is responsible of the oyster greening phenomenon in the Atlantic coast of France. The purified form of this pigment has biological activities, such as antibacterial and antioxidant activities, that could be advantageous in aquaculture. However, the purification of this pigment requires a long process and it is unfeasible for its direct application. The present study aims to conduct phytochemical tests to determine the type of bioactive compounds present in the culture supernatant of Haslea ostrearia (Blue Water, BW) adapted in Indonesia and to test the antioxidant activities of this BW usingthe DPPH assay. The phytochemical screening showed that the BW contained alkaloid compounds. However, no positive results were observed for flavonoid and phenolic compounds. Additionally, the antioxidant activity of BW H. ostrearia was considered very strong, with an IC50 value up to 9.09 mg L-1, which is higher than that of vitamin C (2.65 mg L-1), yet lower than that of chlorophyll (28.56 mg L-1). The culture supernatant of H. ostrearia containing marennine could potentially be used as a natural antioxidant, more feasible than its purified form, for further applications in aquaculture. © 2021, BIOFLUX SRL. All rights reserved.
Department of Marine Science, Padjadjaran University, Raya Bandung St., Sumedang KM 21 Jatinangor, Sumedang, West Java, 45363, Indonesia; Research Center of Molecular Biotechnology and Bioinformatics, Universitas Padjadjaran, Bandung, West Java, Indonesia; Padjadjaran University, Raya Bandung St., Sumedang KM 21 Jatinangor, Sumedang, West Java, 45363, Indonesia; University of Brawijaya, Malang, 65145, Indonesia; FR CNRS 3473 IUML, Mer-Molécules-Santé (MMS), University of Le Mans, Avenue O. Messiaen, Le Mans Cedex 9, 72085, France
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