Hidayah Triana2016-11-01Full Text Available Method of foreign gene transfer in red seaweed Kappaphycus alvarezii has been reported, however, li-mited number of transgenic F0 (broodstock was obtained. This study was conducted to improve the method of gene transfer mediated by Agrobacterium tumefaciens in order to obtain high percentage of K. Alvarezii transgenic. Superoxide dismutase gene from Melastoma malabatrichum (MmCu/Zn-SOD was used as model towards increasing adaptability of K.

Alvarezii to environmental stress. The treat-ments were the culture media and recovery duration, and each treatment consisted of three replica-tions. The best method was co-cultivation using liquid media, then recovery was conducted in liquid media for 10 days. That treatment allowed higher transformation percentage (90%, regeneration effi-ciency (90%, putative bud efficiency (100%, number of buds and explants sprouted (100% and transgenic explants (100%. The transgenic explants showed an amplification PCR product of Mm-Cu/Zn-SOD gene fragment, whereas the non-transgenic explants showed no amplification product. All results revealed that suitable method of transgenesis for K. Alvarezii has been developed.

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Dasar keinginan penulis untuk mengetahui penyerapan limbah budidaya ikan nila oleh rumput laut dengan sistem polikultur. Penelitian ini dilaksanakan di Laboratorium Akuatik, SEAMEO BIOTROP. Penulis menyampaikan terimakasih kepada: 1. Irzal Effendi, M.Si dan Ir. Erina Sulistiani, M.Si yang telah memberikan.

Keywords: Agrobacterium tumefaciens, culture media, Kappaphycus alvarezii, recovery duration, transformation.Bambang Ali Akbar2016-03-01Full Text Available Tujuan penelitian ini adalah mempelajari pengaruh penggunaan Sargassum aquifolium dengan konsentrasi dan lama waktu perendaman yang berbeda terhadap pertumbuhan Kappaphycus alvarezii, serta mengetahui pengaruh penggunaan S. Aquifolium terhadap persentase kadar karaginan K. Penelitian menggunakan Rancangan Acak Lengkap (RAL dengan perlakuan faktorial yang terdiri dari dua faktor yaitu faktor 1 berupa konsentrasi ekstrak Sargassum aquifolium dan faktor 2 berupa perlakuan lama perendaman. Faktor 1 terdiri atas 4 perlakuan konsentrasi perendaman yaitu kontrol (K0, konsentrasi 5% (K1, 10% (K2, 15% (K3. Faktor 2 terdiri atas 3 taraf yaitu lama perendaman 30 menit (T1, 60 menit (T2 dan 90 menit (T3. Data variabel penelitian dianalisis menggunakan analisis sidik ragam (ANOVA pada taraf kesalahan 5%. Hasil penelitian menunjukkan bahwa pemberian ekstrak Sargassum aquifolium tidak memberikan pengaruh terhadap pertumbuhan rumput laut Kappaphycus alvarezii.

Perlakuan K1T3 (perendaman dengan konsentrasi 5% selama 90 menit menunjukkan hasil tertinggi dari perlakuan lainnya, nilai laju pertumbuhan spesifik 6.11%, pertumbuhan mutlak 663.89 gram, berat kering 197.80 gr dan nilai kadar karaginan yaitu 53.33%. Berat kering terendah diperoleh pada perlakuan K3T3 (perendaman dengan konsentrasi 15% selama 90 menit.