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Diana Putri
Institut Pertanian Bogor
Medicine & Pharmacology

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Eksplorasi Bakteri Endofit dari Akar Tanaman Adam Hawa dan Potensinya sebagai Agens Hayati dan Pemacu Pertumbuhan Tanaman Padi Ankardiansyah Pandu Pradana; Diana Putri; Abdul Munif
Jurnal Fitopatologi Indonesia Vol 11 No 3 (2015)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (286.157 KB) | DOI: 10.14692/jfi.11.3.73

Abstract

Rhoeo discolor has been known to have a good adaptation to various environmental conditions. This character might be due to mutualistic association with endophytic bacteria. The objective of this study was to isolate endophytic bacteria from roots of R. discolor and to evaluate their potency as biocontrol agents and plant growth promoters. The methods to isolate endophytic bacteria involved the following methods, sterilization of root surface, grinding of root tissues, dilution, and plating in the medium tryptone soya agar (TSA). A total of 21 isolates of endophytic bacteria were isolated from the roots of R. discolor. Based on hypersensitivity test on tobacco leaves, 19 isolates showed negative reaction (no necrosis symptom) and only 2 isolates showed positive reaction (necrosis was developed). The results on biocontrol and growth promoters assay showed that 7 isolates were able to inhibit the growth of Fusarium oxysporum under in vitro test and 12 isolates were able to increase the growth of rice seedlings.
Lama Penyimpanan, Karakterisasi Fisiologi, dan Viabilitas Bakteri Endofit Bacillus sp. dalam Formula Tepung Diana putri; Abdul Munif; Kikin Hamzah Mutaqin
Jurnal Fitopatologi Indonesia Vol 12 No 1 (2016)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (333.339 KB) | DOI: 10.14692/jfi.12.1.19

Abstract

Endophytic bacteria can be formulated to retain its ability as disease control agents. Three of endophytic bacteria which had the capability to suppress infection of Meloidogyne sp, and to enhance pepper growth were gained from the previous study. This research was aimed to evaluate the influence of storage time on the viability of endophytic bacteria, Bacillus sp. AA2, Bacillus sp. MER and MSJ, and to study its physiological charaterization during storage. The formulation evaluated in this study was : formulation 1 (50 g talc, 1 g pepton, 0.5 g CMC, and brown sugar 1.5 g), formulation 2 (50 g talc, 1 g pepton, 0.5 g CMC, and 1.5 g white sugar), formulation 3 (50 g talc, 1 g pepton, 0.5 g CMC, 1 g yeast extract, and 1.5 gwhite sugar) and formulation 4 (50 g talc, 1 g pepton, 0.5 g CMC, 1 g yeast extract, 3 mL molasses, 1 gbentonite, 0.75 g calcium carbonate, and 1 g dextrose). The results of the bacterial characterization showed that Bacillus sp AA2 and Bacillus sp MER belongs to Gram positive, produced lipase and protease enzyme, as well as  IAA hormone. N2 fixation is only existed in Bacillussp. AA2 and MSJ isolate. The highest viability was shown on MSJ isolate with 2.5×106 cfu mL-1. in the fourth formulation, whereas Bacillus sp. AA2 and Bacillus sp. MER viability was 1.9×106 cfu mL-1. and 1.2×106 cfu mL-1. , respectively. 
Co-Authors Abdul Munif Ankardiansyah Pandu Pradana Kikin H Mutaqin