Aktivitas Antimikroba Ekstrak Bakau (Rhizophora mucronata) dalam Menghambat Pertumbuhan Ralstonia Solanacearum Penyebab Penyakit Layu

Abstract

R. mucronata has been widely used as a traditional medicinal plant because it is capable of producing secondary metabolites such as tannins, alkaloids, terpenoids, sapponins and flavonoids. This study discusses the potential of leaf and stem bark as inhibitors of R. solanacearum with the concentrations of 5000 ppm, 10000 ppm and 20000 ppm, positive control (Chlorampenicol), and negative control (Ethanol 40%). The method used for the inhibitory assay uses the agar diffusion method. The results showed the moisture factor of leaves of R. mucronata (0.33g) stem bark (0.58g). The yield of leaf extract (17.61%) stem bark (7.85%). The percentage of inhibition showed that R. mucronata leaf extract had inhibition on R. solanacearum at concentrations of 20000 ppm and 10,000 ppm, respectively 31% and 29%, but on the other hand on leaves of R. mucronata a concentration of 5000 ppm had no inhibitory activity. In different samples R. mucronata stem bark showed an inhibition at concentrations of 5000 ppm, 10000 ppm and 20000 ppm with a percentage value of 34%, 39%, and 44%, respectively.