Metabolic profiles of functional microbes in Ganoderma and non-Ganoderma infected oil palm rhizospheres

Low Y. C., . and Zainal Abidin M. A., . and Sariah M., . and Radziah O., . (2009) Metabolic profiles of functional microbes in Ganoderma and non-Ganoderma infected oil palm rhizospheres. [Proceedings Paper]

Soil dwelling microbes constitutes the base of all living organisms on earth. Unique living conditions and requirements make the understanding of these microbes difficult. Limited techniques and tools available are constraints that often restrict our knowledge on their contributions in soils. Soil microbes have been known to be good indicators for soil health and cropping systems sustainability due to their fast turn over and their sensitivity towards environmental changes. The research undertaken was aimed to examine relationships between soil microbial diversity and oil palm health. Sampling sites located at Jengka Pahang were selected to include an adjacent virgin forest area as a reference point. Samplings at six months interval were done on soils cultivated with 20 year-old palms infected or non-infected by Ganoderma basal stem rot disease. The estimated percentage of disease incidence was 30. Screening of functional microbes in the Ganoderma and non-Ganoderma infected areas were carried out using Community Level Physiological Profiles BIOLOG EcoPlate method. In a separate experiment functional microbes were enumerated using plate count method. General media NA -Nutrient Agar and PDA -Potato Dextrose Agar as well as specific media for nitrogen fixers phosphate solubilisers lignin cellulose and chitin degraders were used for functional microbes enumeration. Analysis of microbial profiles showed that microbial communities in non-Ganoderma infected soils were more similar to virgin forest soils. A more dispersed profile was observed in Ganoderma infested soils. Data obtained from microbial enumeration on the general media TSA and PDA showed no significant difference between Ganoderma and non-Ganoderma infected soils. Similar observations were made on specific media. Results obtained suggested that microbial communities found in Ganoderma and non-Ganoderma infected soils exhibited different profiles. Although the microbial enumeration indicated no significant difference the difference the different species of microbes found need to be further identified and characterized to explain their presence and roles in these soils.

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Abstract

Soil dwelling microbes constitutes the base of all living organisms on earth. Unique living conditions and requirements make the understanding of these microbes difficult. Limited techniques and tools available are constraints that often restrict our knowledge on their contributions in soils. Soil microbes have been known to be good indicators for soil health and cropping systems sustainability due to their fast turn over and their sensitivity towards environmental changes. The research undertaken was aimed to examine relationships between soil microbial diversity and oil palm health. Sampling sites located at Jengka Pahang were selected to include an adjacent virgin forest area as a reference point. Samplings at six months interval were done on soils cultivated with 20 year-old palms infected or non-infected by Ganoderma basal stem rot disease. The estimated percentage of disease incidence was 30. Screening of functional microbes in the Ganoderma and non-Ganoderma infected areas were carried out using Community Level Physiological Profiles BIOLOG EcoPlate method. In a separate experiment functional microbes were enumerated using plate count method. General media NA -Nutrient Agar and PDA -Potato Dextrose Agar as well as specific media for nitrogen fixers phosphate solubilisers lignin cellulose and chitin degraders were used for functional microbes enumeration. Analysis of microbial profiles showed that microbial communities in non-Ganoderma infected soils were more similar to virgin forest soils. A more dispersed profile was observed in Ganoderma infested soils. Data obtained from microbial enumeration on the general media TSA and PDA showed no significant difference between Ganoderma and non-Ganoderma infected soils. Similar observations were made on specific media. Results obtained suggested that microbial communities found in Ganoderma and non-Ganoderma infected soils exhibited different profiles. Although the microbial enumeration indicated no significant difference the difference the different species of microbes found need to be further identified and characterized to explain their presence and roles in these soils.

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. TP 684 P3 161 2009 vol. 2 Call Number.
AGROVOC Term:	Microbes
AGROVOC Term:	Oil palms
AGROVOC Term:	Ganoderma
AGROVOC Term:	Microorganisms
AGROVOC Term:	Biodiversity
AGROVOC Term:	Disease incidence
AGROVOC Term:	Soil sampling
AGROVOC Term:	Data analysis
AGROVOC Term:	Experiments
AGROVOC Term:	Rhizosphere
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:15
URI:	http://webagris.upm.edu.my/id/eprint/12566

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