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All Journal Hayyan Journal Mammiri: Jurnal Pengabdian Masyarakat
Sri Ayu Anggita
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Engineering Languange, Linguistic, Communication & Media Medicine & Pharmacology Social Sciences Other

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Journal : Hayyan Journal

 1 
Exploration of Endophytic Bacteria from Katuk Plants (Sauropus androgynus L.) Sri Ayu Anggita
Hayyan Journal Vol. 1 No. 3 (2024): October
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v1i3.2442

Abstract

This study aimed to explore and identify endophytic bacteria from katuk plants (Sauropus androgynus L.) and evaluate their potential as biological control agents. A total of 14 bacterial isolates were successfully obtained from the roots, stems, and leaves of katuk plants. Safety assessments were conducted through hypersensitivity response (HR) and hemolysis (HL) tests. The HR test on tobacco plants indicated that all isolates were non-pathogenic, as no necrotic symptoms were observed. However, the hemolysis test revealed two isolates capable of forming α-hemolysis zones on blood agar, suggesting potential risks to mammals. Antibacterial activity against the plant pathogen Ralstonia solanacearum was evaluated using spot inoculation methods. The results showed that none of the isolates were able to inhibit the growth of R. solanacearum. Although the isolates may produce antibacterial compounds, the amounts are likely insufficient or involve unidentified active compounds. Further studies are needed to fully characterize these isolates and explore their potential applications in sustainable agriculture.
Exploration of Endophytic Bacteria from Katuk Plants (Sauropus androgynus L.) Sri Ayu Anggita
Hayyan Journal Vol. 1 No. 3 (2024): October
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v1i3.2442

Abstract

This study aimed to explore and identify endophytic bacteria from katuk plants (Sauropus androgynus L.) and evaluate their potential as biological control agents. A total of 14 bacterial isolates were successfully obtained from the roots, stems, and leaves of katuk plants. Safety assessments were conducted through hypersensitivity response (HR) and hemolysis (HL) tests. The HR test on tobacco plants indicated that all isolates were non-pathogenic, as no necrotic symptoms were observed. However, the hemolysis test revealed two isolates capable of forming α-hemolysis zones on blood agar, suggesting potential risks to mammals. Antibacterial activity against the plant pathogen Ralstonia solanacearum was evaluated using spot inoculation methods. The results showed that none of the isolates were able to inhibit the growth of R. solanacearum. Although the isolates may produce antibacterial compounds, the amounts are likely insufficient or involve unidentified active compounds. Further studies are needed to fully characterize these isolates and explore their potential applications in sustainable agriculture.
Abundance of Endophytic Bacteria in Sauropus androgynus and Evaluation of Chitinolytic Activity Sri Ayu Anggita
Hayyan Journal Vol. 2 No. 2 (2025): June
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v2i2.3175

Abstract

This study aimed to isolate and evaluate the biological safety and potential of endophytic bacteria from Sauropus androgynus (katuk) and their Chitinolytic activity for use as biological agents. A total of 14 endophytic bacterial isolates were obtained from different plant parts: 5 from the roots (T1, T2, T3, T4, P14), 5 from the stems (T7, T8, T9, T10, T11), and 4 from the leaves (T5, P6, KB12, T13). The safety of these isolates was assessed through hypersensitivity (HR) and hemolysis (HL) tests. In the HR test, none of the isolates induced necrotic symptoms in tobacco leaves, indicating they are not pathogenic to plants. In the HL test, two bacterial which were T4 from roots and T5 from leaves, isolates were found to produce clear zones on blood agar, indicating α-hemolysin production. However, the other isolates did not form hemolysis zones, suggesting they are safe for mammals. Antibacterial activity against the plant pathogen Ralstonia solanacearum was evaluated using spot inoculation methods. The results showed that none of the isolates were able to inhibit the growth of R. solanacearum. Further testing revealed that one bacterial isolate which was T8 obtained from the stem produced chitinase, as evidenced by the formation of a clear zone around the bacterial colony on chitin-containing media.
Co-Authors Andi Jusriana Ihfa Indira Nurnaifah Muhamad Baidhowi Primadi Muhammad Baidhowi Primadi Nana Aulia Massakuta Nurnaifah, Ihfa Indira