Karakteristik Bakteri Rhizobium japonicumBintil Akar Kedelai pada Cekaman Salinitas Bertingkat

Rohmani, Risma Wakhidatur and Erdiansyah, Iqbal (2020) Karakteristik Bakteri Rhizobium japonicumBintil Akar Kedelai pada Cekaman Salinitas Bertingkat. Agropross. pp. 101-107. ISSN 978-623-94036-6-9

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Abstract

The increase in the surface temperature of the earth has an impact on rising sea levels to the land, this is what causes the salts contained by seawater to experience sedimentation in the soil through which it passes. Salted soybean plants can reduce crop production because dissolved salts can reduce the potential of soil solution so that plants experience water shortages. Specific technology used to support the growth and yield of soybean plants in saline land is the use of biological fertilizers, one of which comes from Rhizobium japonicum. Rhizobium japonicum is a rhizosphere bacterium that is able to break down free nitrogen in the air into elements that are able to be absorbed by plants. Nitrogen is a very important nutrient in the process of plant photosynthesis to produce photosynthates that are useful for optimal growth and production. This study aims to isolate and characterize the Rhizobium japonicum bacteria at a certain level of salinity in the YEMA + Congo Red media, this research was conducted in June 2019 to September 2019 at the Jember PolytechnicBiosciences Laboratory. This research was conducted using a non-parametric design with various levels of salinity stress in the media, namely: 0 ppm, 1000 ppm, 2500 ppm, 4000 ppm, and 8000 ppm. The results showed that the colonies of Rhizobium japonicum were white to pink with a convex shape that was white to pink and had a cell size of 2μ-4μ

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