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All Journal BERITA BIOLOGI Jurnal Penelitian Pendidikan IPA (JPPIPA)
Ernin Hidayati
Universitas Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics

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AKTIVITAS ANTIBAKTERI AIR PERASAN DAN REBUSAN DAUN CALINCING (Oxalis corniculata L.) TERHADAP Streptococcus mutans Ni Luh Arisa Prahastuti Winastri; Handa Muliasari; Ernin Hidayati
BERITA BIOLOGI Vol 19, No 2 (2020)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v19i2.3786

Abstract

Inappropriate use of antibiotics can cause bacteria to become resistant and have side effects, therefore an alternative source of antibacterial is needed. One species of plant that has antibacterial properties is calincing (Oxalis corniculata L.). Antibacterial activities of the juice and decoction of calincing leaves against Streptococcus mutans have not reported yet. This study aims to determine the antibacterial activity of the juice and decoction of calincing leaves against Streptococcus mutans. This study uses a well diffusion method with eight treatment groups, namely juice and decoction at the concentrations of 20%, 40%, 60%; listerin 100% as a positive control, and distilled water as a negative control. The diameter of the inhibitory zone of the juice and decoction of calincing leaf at a concentration of 20% are 19 mm and 24.33 mm respectively, and classified as strong growth inhibition, while the concentrations of 40% and 60% are classified as very strong growth inhibition. Growth inhibition of the juice and decoction of calincing leaf at concentration of 20% was significantly higher than the positive control. The best antibacterial activity against Streptococcus mutans is produced by the juice and decoction of calincing leaf at concentration of 60%. Increasing in the concentration of the juice or decoction of calincing leaf also increases the diameter of the inhibitory zone.   
English Antibacterial Power of the Patikan Kebo Plant (Euphorbia hirta) Against Leaf Blight Bacteria (Xanthomonas oryzae) Meysya Putri; Ernin Hidayati; Suripto Suripto
Jurnal Penelitian Pendidikan IPA Vol 11 No 8 (2025): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i8.12244

Abstract

Bacterial leaf blight (BLB) is a significant disease of rice plants. It is caused by the Gram-negative bacterium Xanthomonas oryzae and often leads to yield losses. Excessive use of synthetic chemicals to control BLB has raised concerns over resistance and chemical residues. Therefore, natural alternatives are needed, such as Euphorbia hirta, which is traditionally used as a medicinal plant. This study aimed to determine the inhibitory power of E. hirta extracts against X. oryzae and to identify the presence of flavonoids, tannins, and saponins. Plant extracts were prepared by ethanol maceration, hot-water infusion (~90 °C), and fresh squeezing. Antibacterial activity was evaluated by the well diffusion method on Mueller-Hinton Agar with concentrations of 25–100% (v/v), using chloramphenicol as positive control. Inhibition zones were measured after 24–120 h. The results showed that all preparations inhibited X. oryzae, with ethanol extract producing the strongest activity (10.65–15.94 mm), followed by infusion (3.09–6.31 mm) and fresh-juice (1.50–4.85 mm), compared to chloramphenicol (21.40 mm). Phytochemical tests confirmed flavonoids, tannins, and saponins in all extracts. In conclusion, E. hirta demonstrates antibacterial potential against  , with ethanol extract being the most effective.
Co-Authors Handa Muliasari Meysya Putri Ni Luh Arisa Prahastuti Winastri Suripto Suripto