Harwanto, Yunimar, C.M. Wibisono
The strategy for improving the productivity of fruit and vegetables in Indonesia can be done through modification of the existing cultivation system by adding certain component of healthy practice farming. One of the approaches for achieving that aim is through the usage of endophytes in cultivation system. The identified mechanisms of endophytic microbes are that the stimulant produced by them is able to suppress diseases and pests that pose a significant threat for plants. Moreover, endophytic microbes are also capable of producing antimicrobial compounds and bio stimulating compounds such as phytohormones and proteins. The purpose of this study was to determine the ability of endophytic bacteria isolates that were taken from collection of Indonesian Citrus and Subtropic Fruits Research Institute in producing IAA hormone, phosphate solvent and nitrogen fixing. The research consisted of several stages; testing for Free Nitrogen Binding Bacteria; Phosphate Solubilizing Bacteria and in Producing IAA. The results showed the three endophytic bacterial isolates isolated from different citrus varieties had the ability to fix free nitrogen. G.28-isolates and G.35_isolates had identical ability to dissolve phosphate, while G.31-isolates could not dissolve phosphate. The most effective time to produce IAA is the fourth day of incubation. G.35-isolates was the bacterial isolate that had the highest IAA production. © Published under licence by IOP Publishing Ltd.
Indonesian Citrus and Subtropical Fruits Research Institute, Jl. Raya Tlekung No. 1, Junrejo, Batu City, East Java, 65327, Indonesia; Brawijaya University, Jl. Veteran, Ketawanggede, Lowokwaru, East Java, 65145, Indonesia
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