Aktivitas Antibakteri Dari Ekstrak Kasar Bakteri Yang Berasosiasi Dengan Sponge Acanthostrongylophora SP.

Sponges have a potential to produce bioactive compounds. Their ability to do it since there is a symbiotic relationship with microorganisms in these bacteria. Because of this critical role, the bacteria symbiotic with sponge allegedly have great potential in terms of producing bioactive compounds that have been isolated from sponges (Lee, et al, 2001). In this study, using bacterial culture preparations isolated from the sponge, Acanthostrongylophora sp., the bacterial isolates were tested for their antibacterial activities using a well diffusion test. Based on the antibacterial activity test, the bacterial isolates known as BPO (shaped wavy white dots) and BPB (white threadlike have a certain type of thread) had antibacterial activity. ODS had a broad spectrum as potent against all three types of tested bacteria (Vibrio cholerae, Staphyloccocus aureus, Bacillus subtillis)

Screening of the Proteolytic Bacteria Symbiont with Algae Gracillaria SP.

Alga laut merupakan sumberdaya alam yang melimpah di Indonesia tetapi belum optimal dimanfaatkan oleh masyarakat. Pemanfaatan rumput laut masih terbatas sebagai bahan makanan seperti Gracillaria sp. dibudidayakan sebagai bahan ekspor industri karajinan. Alga Gracillaria sp. hidupnya bersimbion dengan beraneka ragam jenis bakteri. Tujuan penelitian adalah untuk mengisolasi dan menguji aktivitas protease bakteri simbion alga Gracillaria sp. Penelitian ini berhasil mengisolasi 4 bakteri yang berbeda berdasarkan karakteristik morfologi. Keempat bekteri tersebut adalah S.G., 1 S.G., 2 S.G., 3 dan S.G., 4 Isolat bakteri S.G., 1 memiliki kemampuan menghasilkan ptotease dengan Indeks proteolitik sebesar 1,5.Kata Kunci : Bakteri simbion, Gracillaria sp. proteas