Burkholderia vietnamiensis Isolated from Root Tissues of Nipa Palm (Nypa fruticans) in Sarawak, Malaysia, Proved to Be Its Major Endophytic Nitrogen-Fixing Bacterium
2010
TANG, Sui-Yan | HARA, Shintaro | MELLING, Lulie | GOH, Kah-Joo | HASHIDOKO, Yasuyuki
Root-associating bacteria of the nipa palm (Nypa fruticans), preferring brackish-water affected mud in Sarawak, Malaysia, were investigated. In a comparison of rhizobacterial microbiota between the nipa and the sago (Metroxylon sagu) palm, it was found that the nipa palm possessed a group of Burkholderia vietnamiensis as its main active nitrogen-fixing endophytic bacterium. Acetylene reduction by the various isolates of B. vietnamiensis was constant (44 to 68 nmol h−1 in ethylene production rate) in soft gel medium containing 0.2% sucrose as sole carbon source, and the bacterium also showed motility and biofilm-forming capacity. This is the first report of endophytic nitrogen-fixing bacteria from nipa palm.
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