KARAKTERISASI BAKTERI ENDOFIT PELARUT FOSFAT DARI KULIT BATANG TUMBUHAN RARU

Fadhilah, Nurul Fitri (2015) KARAKTERISASI BAKTERI ENDOFIT PELARUT FOSFAT DARI KULIT BATANG TUMBUHAN RARU. Undergraduate thesis, UNIMED.

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Abstract

Penelitian ini bertujuan untuk mengisolasi isolat bakteri endofit pada kulit batang tumbuhan raru (Cotylelobium melanoxylon) yang mampu melarutkan fosfat, dan mengkarakterisasikan bakteri tersebut berdasarkan morfologi, fisiologi dan biokimianya. Penelitian ini dilaksanakan di laboratorium Biologi Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan selama 3 bulan yaitu mulai November 2014 sampai Februari 2015. Sampel isolat bakteri endofit pada kulit batang tumbuhan raru (Cotylelobium melanoxylon) merupakan koleksi dari laboratorium Biologi Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan. Isolasi bakteri pelarut fosfat dilakukan secara analisis kuantitatif dengan melihat zona bening pada media pikovskaya yang telah diinokulasikan bakteri endofit setelah diinkubasi pada suhu 30°C selama 10 hari. Karakterisasi bakteri yang positif pelarut fosfat dilakukan berdasarkan morfologi, fisiologi dan biokimianya dengan melihat perubahan warna pada media yang digunakan. Hasil penelitian menunjukkan bahwa dari 24 isolat diperoleh 2 isolat yang mampu melarutkan fosfat yaitu ER12 dan ER23. Karakter bakteri ER12 memiliki bulat dengan tepi koloni rata, warna koloni putih bening, dengan permukaan licin dan elevasi yang rata, bakteri ER 23 memilki tipe tepi koloni berombak, warna koloni putih dengan permukaan licin dan elevasi yang rata, kedua bakteri tersebut termasuk Gram positif. Dari uji biokimia bakteri endofit ER 12 dan ER 23 dapat menghasilkan asam campuran, menghidrolisis protein, menghasilkan enzim gelatinase, katalase dan tidak dapat menghasilkan enzim urease, sitrase dan tidak dapat menghidrolisis hidrogen sulfida. Suhu optimum untuk pertumbuhan isolat baktei ER 12 dan ER 23 adalah 35°C. Dan pH optimum untuk pertumbuhan isolat bakteri ER 15 adalah 7,2 dan 8,9 sementara ER 23 dapat tumbuh optimum pada rentang pH lebih luas yaitu pH 6,5 sampai 8,9.

Item Type: Thesis (Undergraduate)
Contributors:
ContributionNameNIDN/NIDK
Thesis advisorHasanah, Uswatun196103011988032002
Call Number: SK-2015 BIO 012
Keywords: bateri, Marfologi, Fisiologi, Biokimia
Subjects: Q Science > QD Chemistry > QD415 Biochemistry
Q Science > QH Natural history > QH301 Biology > QH540 Ecology
Q Science > QR Microbiology > QR75 Bacteria
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam > Biologi
Depositing User: Mr Maknun
Date Deposited: 20 Dec 2016 04:18
URI: http://digilib.unimed.ac.id/id/eprint/22222

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