Aktivitas antioksidan dan antibakteri dari alkaloid bakteri endofit Pseudomonas hibiscicola WK asal daun waru (Hibiscus tiliaceus)

Purbowatiningrum Ria Sarjono, Diponegoro University, Indonesia

Abstract


Telah diperoleh isolat senyawa alkaloid dari bakteri endofit Pseudomonas hibiscicola Wk. Bakteri endofit Pseudomonas hibiscicola Wk adalah bakteri hasil isolasi dari daun waru. Hasil isolasi senyawa alkaloid dikarakterisasi menggunakan kromatografi lapis tipis. Senyawa alkaloid hasil isolasi dilakukan uji kadar total fenol, aktivitas antioksidan. Hasil fitokimia hasil isolasi bakteri endofit Pseudomonas hibiscicola Wk positif mengandung alkaloid, diperkuat dengan nilai Rf sebesar 0,8125 yang mirip dengan nilai Rf alkaloid dari tanaman tapak dara yaitu vindoline (Rf = 0,85). Senyawa alkaloid dari bakteri endofit Pseudomonas hibiscicola Wk memiliki kadar total fenol tertinggi sebesar 2,390 mgek asam galat/gram sampel pada konsentrasi 10.000 mg/L. Hasil tersebut menandakan bahwa pada senyawa alkaloid yang diperoleh terdapat gugus fenol. dNilai IC50 yang diperoleh dari senyawa alkaloid hasil isolasi sebesar 99,70 mg/L yang menunjukkan bahwa alkaloid hasil isolasi mempunyai kemampuan antioksidan yang kuat, serta mampu menghambat pertumbuhan bakteri E.coli dan S.aureus.


Keywords


Daun waru,bakteri endofit, alkaloid, antioksidan, antibakteri

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DOI: https://doi.org/10.21831/jps.v30i1.77501

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