Effect of carbon sources on bacterial production of metabolites against Fusarium oxysporum and Colletotrichum gloeosporioides
2011
Farana, M.S.N. (Universiti Putra Malaysia, Sarawak (Malaysia). Dept. of Crop Science) | Bivi, M.R. (Universiti Putra Malaysia, Sarawak (Malaysia). Dept. of Crop Science) | Khairulmazmi, A. (Universiti Putra Malaysia, Sarawak (Malaysia). Dept. of Crop Science)
This study was conducted to determine the effect of carbon sources on the production of bacteria metabolites against Fusarium oxysporum and Colletotrichum gloeosporioides. Antagonistic bacteria were identified by using Biology Identification System known as Malikia spinosa and Stenotrophomonas maltophilia, while the unidentified was named as UPMKB4. For optimizing antimicrobial substances, M. spinosa, UPMKB4 and S. maltophilia were cultured individually or combination in liquid media with addition of 2g carbon sources derived from glucose, fructose and glycerol. Results revealed that different types of carbon source amended in liquid media determined the efficacy on the antimicrobial substances. Specific or special types of carbon sources are required to suppress different types of plant pathogenic pathogens effectively. Malformed, shrunken and vacuolar hyphae were observed on the treated plant pathogenic fungi in the presence of antimicrobial substances.
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