Abstract
Basal stem rot (BSR) caused by soil-borne pathogen, Ganoderma boninense, is one of the constraint factors in palm oil production in the world. The presence of rhizosphere microbes such as bacteria is an important factor whose presence can be beneficial to plants or become a pathogen. Unfortunately, information about the abundance and diversity of bacteria associated with healthy and infected oil palm rhizosphere of G. boninense is still limited. This research aims to compare the abundance and diversity of bacteria associated with healthy and infected oil palm rhizosphere of G. boninense. Soil samples were taken from a healthy and infected oil palm rhizosphere in the Bahilang, North Sumatra. The results showed that the abundance and diversity of bacteria from the healthy rhizosphere were higher than infected rhizosphere. In a healthy rhizosphere, the abundance and diversity of bacteria were higher at soil depths of 10-20 cm compared to soil depths of 0-10 cm. Otherwise, the abundance and diversity of bacteria in the infected rhizosphere were higher at depths of 0-10 cm.
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