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AKTIVITAS ANTIBAKTERI DARI BAKTERI ENDOFIT ASAL AKAR CIPLUKAN (Physalis angulata L.) TERHADAP Staphylococcus aureus DAN Escherichia coli Nugraheni, Ika Afifah; Setianah, Heni; Wibowo, Doddy Sulistiawan
Biomedika Vol 13, No 1 (2021): Biomedika Februari 2021
Publisher : Universitas Muhamadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/biomedika.v13i1.11009

Abstract

ABSTRAKCiplukan (Physalis angulata L.) merupakan tanaman herbal yang mengandung berbagai manfaat bagi kesehatan manusia, termasuk bagian akar. Manfaat lain yang dimiliki akar tanaman ciplukan masih perlu dieksplorasi, termasuk dengan kemampuan bakteri endofit yang hidup di dalam jaringan tanaman. Hubungan simbiosis mutualisme antara bakteri endofit dengan tanaman memungkinkan bakteri dapat menghasilkan senyawa bioaktif yang sama dengan tanaman inangnya. Penelitian ini bertujuan untuk mengisolasi dan menguji potensi aktivitas antibakteri dari bakteri endofit asal akar tanaman ciplukan terhadap bakteri patogen, yaitu Staphylococcus aureus dan Escherichia coli. Total enam isolat bakteri endofit yang digunakan merupakan hasil isolasi dari akar tanaman ciplukan pada penelitian sebelumnya. Uji aktivitas antibakteri dilakukan menggunakan metode difusi cakram atau Kirby Bauer, yaitu dengan menghitung diameter zona hambat koloni terhadap bakteri patogen. Sebanyak empat isolat menunjukkan aktivitas penghambatan terhadap S. aureus. Nilai hambat terbesar dimiliki oleh isolat AR21 yaitu sebesar 1,6±0,5 mm. Meskipun demikian, semua isolat tidak membentuk zona penghambatan terhadap E. coli. Hasil ini mengindikasikan bahwa bakteri endofit dari akar tanaman ciplukan memiliki potensi dalam menghasilkan senyawa antibakteri terhadap bakteri patogen dari kelompok gram positif, yang diwakili oleh S. aureus. Bakteri endofit tidak menunjukkan aktivitas antibakteri terhadap bakteri patogen gram negatif, E. coli. Kata Kunci: Akar Ciplukan; Bakteri Endofit; Aktivitas Antibakteri; Staphylococcus aureus; Escherichia coli ABSTRACT               Ciplukan (Physalis angulata L.) is herbal plant that contains various benefits for human health, including the roots. The other benefits of ciplukan roots still need to be explored, including the ability of endophytic bacteria that live in plant tissues. The symbiotic relationship of mutualism between endophytic bacteria and plants allows bacteria to produce the same bioactive compounds as their host plants. This study aims to isolate and test the potential antibacterial activity of endophytic bacteria from ciplukan roots against pathogenic bacteria, i.e. Staphylococcus aureus and Escherichia coli. Total of six endophytic bacterial isolates used were the result of ciplukan roots isolation in the previous studies. Antibacterial activity was carried out using the disc diffusion or Kirby Bauer method, by calculating the diameter of inhibitory zone against pathogenic bacteria. A total of four isolates showed inhibitory activity against S. aureus. The largest inhibitory zone was AR21 isolate with value 1.6 ± 0.5 mm. However, all isolates did not form inhibition zone against E. coli. These results indicated that endophytic bacteria from ciplukan roots have potential to produce antibacterial compounds against pathogenic bacteria from gram-positive group, represented by S. aureus. Endophytic bacteria did not show antibacterial activity against gram-negative pathogenic bacteria, E. coli. Keywords: Ciplukan Roots, Endophytic Bacteria, Antibacterial Activity, Staphylococcus aureus; Escherichia coli
Detection of Tilapia Lake Virus (TiLV) in Tilapia (Oreochromis niloticus) by Semi-Nested Reverse Transcriptase Polymerase Chain Reaction (RT-PCR) Method Bimantara, Arif; Anindita, Nosa Septiana; Al Amin, Taofani Rizal; Wantonoro, Wantonoro; Setianah, Heni
International Journal of Health Science and Technology Vol. 5 No. 2 (2023): November
Publisher : Universitas 'Aisyiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31101/ijhst.v5i2.3316

Abstract

Tilapia productivity is influenced by many factors, one of which is Tilapia Lake Virus (TiLV) disease, which can cause a mortality rate due to infection reaching 90%. The development of nested PCR or semi-nested PCR methods can increase the sensitivity of detection of this virus. This study aims to detect the spread of TiLV attacking tilapia early using the semi-nested PCR method with primers designed in this study. Tilapia with TiLV symptoms were taken from a tilapia farmer in Sleman Regency, Yogyakarta Special Region Province. The fish is dissected, and the kidney and lymph target organs are for RNA isolation. The RNA isolation results were converted into cDNA and then amplified in two stages through the semi-nested RT-PCR method. The detection target is the third segment of the RNA of the TiLV. The first and second amplified amplicons were then electrophorized using agarose gel and observed under UV light. The detection results showed no visible band at the first amplification. In the second amplification, each sample showed positive results with the appearance of bands in the detection target gene. The semi-nested RT-PCR method is proven to increase detection sensitivity. Based on these results, it can be concluded that the semi-nested RT-PCR method in this study is effectively used to detect TiLV. It is necessary to develop research on a field scale to test the effectiveness of this method. This research is expected to provide an alternative detection of aquaculture diseases that are more effective and efficient.