EFEKTIVITAS MERKURI KLORIDA (HgCl2) PADA STERILISASI TUNAS SAMPING JATI (Tectona grandis) IN VITRO
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Abstract
Kendala utama dalam mendapatkan material steril pada kultur in vitro yang berasal dari meristem adalah tingginya tingkat kontaminasi permukaan yang disebabkan oleh jamur dan bakteri, dan sering menyebabkan kematian eksplan. Tujuan penelitian ini adalah untuk memperoleh konsentrasi merkuri klorida (HgCl2) yang tepat untuk sterilisasi eksplan tunas samping tanaman jati (Tectona grandis) pada kultur in vitro. Tunas samping berukuran 1 cm dan diameter 0,2 mm direndam dalam HgCl2 pada konsentrasi 0, 100, 200 dan 300 mg/L selama 3 menit. Hasil penelitian menunjukkan bahwa penambahan konsentrasi HgCl2 yang semakin tinggi mampu menekan pertumbuhan jamur dan bakteri pada eksplan serta meningkatkan persentase eksplan aseptik. HgCl2 dengan konsentrasi 300 mg/L merupakan konsentrasi terbaik karena dapat menekan pertumbuhan jamur hingga 100% dan bakteri mencapai 75%, serta menghasilkan tingkat eksplan aseptik dan hidup tertinggi yaitu sebesar 85% pada 9 hari setelah perlakuan. Ukuran eksplan yang kecil mendukung proses sterilisasi dan mengurangi tingkat browning.
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