Population of Prokaryotes Associated with Decomposing Oil Palm Trunk in Peat Soil of Teluk Intan, Perak (original) (raw)

2008

Abstract

ABSTRACT During replanting of oil palm, Elaeis guinensis at the Ganoderma boninense infected oil palm plantation in a peat soil at Teluk Intan, the oil palm trunks (OPT) and boles were shredded and buried to accelerate the decomposition of OPT. Time-course bacterial population in the decomposting OPT and the peat soil monitored via 16SrDNA PCR-DGGE indicated that the prokaryotes population in the peat soil was enriched and changes as the process of decomposition progressed. The initial prokaryotes population comprised mainly the Firmicutes. At 3 months during biodegradation (MDB) the degradating shredded OPT haboured 39% gamma-Proteobacteria, 26% beta-Proteobacteria, 21% Bacteroidetes and 14% Firmicutes while the surrounding soil still contain mainly Firmicutes. At 7 MDB, when biodegradation was very active, the bacterial population in the biodegrading OPT was most diversed and constituting of 51% Firmicutes, 26% beta-Proteobacteria, 9% Bacteroidetes, 5% Bacteria, 4% alpha-Proteobacteria, 3% Actinobacteria, 1% delta-Proteobacteria and 1% gamma-Proteobacteria. The abundance diversed bacterial population contributed to increase bacterial population in the surrounding peat soil, which then comprised of 65% Firmicutes, 11% gamma-Proteobacteria, 8% alpha-Proteobacteria, 8% Bacteroidetes and 5% Bacteria . Subsequently at 9 MDB, the bacterial population in the OPT still comprising mainly or 60% Firmicutes, 20% Bacteroidetes, 10% gamma-Proteobactetia and 10% beta-Proteobacteria. Whilst the soil alpha-Proteobacteria disappeared and comprised mainly of or 86% Firmicutes and 14% gamma-Proteobacteria. As the decomposition of OPT approached near completion at 12 MDB, the OPT was colonies by 36% of Bacteroidetes, 25% gamma-Proteobacteria, 14% Firmicutes, 7% alpha-Proteobacteria, 7% Bacteria, 7% beta-Proteobacteria and 4% Actinobacteria, while the peat soil was enriched with 22%

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