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- 저자 : Abu Seman Idris (검색결과 4 건)
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Shamala Sundram,Sariah Meon,Idris Abu Seman,Radziah Othman 한국미생물학회 2011 The journal of microbiology Vol.49 No.4
Endophytic bacteria (Pseudomonas aeruginosa UPMP3 and Burkholderia cepacia UPMB3), isolated from within roots of oil palm (Elaeis guineensis Jacq.), were tested for their presymbiotic effects on two arbuscular mycorrhizal fungi, (Glomus intraradices UT126 and Glomus clarum BR152B). These endophytic bacteria were also tested for antagonistic effects on Ganoderma boninense PER 71, a white wood rot fungal pathogen that causes a serious disease in oil palm. Spore germination and hyphal length of each arbuscular mycorrhizal fungal (AMF) pairing with endophytic bacteria was found to be significantly higher than spores plated in the absence of bacteria. Scanning electron microscopy (SEM) showed that the endophytic bacteria were scattered, resting or embedded on the surface hyaline layer or on the degraded walls of AMF spores, possibly feeding on the outer hyaline spore wall. The antagonistic effect of the endophytic bacteria was expressed as severe morphological abnormalities in the hyphal structures of G. boninense PER 71. The effects of the endophytic bacteria on G. boninense PER 71 hyphal structures were observed clearly under SEM. Severe inter-twisting, distortion, lysis and shrivelling of the hyphal structures were observed. This study found that the effect of endophytic bacteria on G. intraradices UT126 and G. clarum BR152B resembled that of a mycorrhiza helper bacteria (MHB) association because the association significantly promoted AMF spore germination and hyphal length. However, the endophytic bacteria were extremely damaging to G. boninense PER 71.
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Isshadiba Faikah Mustafa,Mohd Zobir Hussein,Abu Seman Idris,Nur Rashyeda Ramli,Muskhazli Mustafa,Sharida Fakurazi 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.4
The endophytic bacterium, Pseudomonas aeruginosa, was successfully encapsulated into calcium carbonate microshells and coated with sodium alginate in combination with two other materials: skim milk and empty fruit bunch (EFB). The presence of bacteria cells was confirmed by a strand-like structure, a biofilm through morphology and elemental analysis. The survivability of microencapsulated bacteria was found to last for 17 months when they were maintained in a storage condition of 4 °C. Different coating materials used exhibited significant differences in the P. aeruginosa survival during the storage time. Their bioactivity against Ganoderma boninense resulted in a percentage inhibition radial growth (PIRG) value of more than 70%, which is better than its counterparts, the free Pseudomonas cells. With promising viability results of × 106 CFU/mL after three-month storage, the results demonstrate that skim milk-coated alginate might be good protection for P. aeruginosa that could sustain the viable bacteria at the target site. This is toward a greener, biological control-based plant protection for Ganoderma diseases in the oil palm planting industry.
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M. Shahul Hamid Rahamah Bivi,Adamu Saidu Paiko,Ahmad Khairulmazmi,M. S. Akhtar,Abu Seman Idris 한국식물병리학회 2016 Plant Pathology Journal Vol.32 No.5
Continuous supplementation of mineral nutrients andsalicylic acid (SA) as foliar application could improveefficacy in controlling basal stem rot (BSR) disease inoil palm seedling. It is revealed from the results thatthe highest disease severity index (58.3%) was recordedin T8 treatments at 9 months after inoculation. The best disease control was achieved by T7 treatments(calcium/copper/SA [Ca/Cu/SA]) (5.0%) followedby T1 (5.5%), T5 (5.8%), T3 (8.3%), T6 (8.3%),T4 (13.3%), and T2 (15.8%) treatments. Continuoussupplementation of Ca/Cu/SA was found to be themost effective in controlling the disease and the highperformance liquid chromatography results showedthe detection of ergosterol at very low concentration inthe treated samples. Moreover, the transmission electronmicroscopy analysis results clearly indicated thatT7 treatment was also enhancing lignification, whichwas responsible for the thickness of the secondarycell walls and middle lamella compared to untreatedsamples. It was therefore, concluded that continuoussupplementation of minerals nutrients and SA couldeffectively suppress disease severity by reducing ergosterolactivity and also improve the process of lignificationin the treated plants. Furthermore, this treatmentalso managed to delay the onset of BSR symptoms andpromote the growth of the seedlings and eventuallysuppress the BSR disease.
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Bivi, M. Shahul Hamid Rahamah,Paiko, Adamu Saidu,Khairulmazmi, Ahmad,Akhtar, M.S.,Idris, Abu Seman The Korean Society of Plant Pathology 2016 Plant Pathology Journal Vol.32 No.5
Continuous supplementation of mineral nutrients and salicylic acid (SA) as foliar application could improve efficacy in controlling basal stem rot (BSR) disease in oil palm seedling. It is revealed from the results that the highest disease severity index (58.3%) was recorded in T8 treatments at 9 months after inoculation. The best disease control was achieved by T7 treatments (calcium/copper/SA [Ca/Cu/SA]) (5.0%) followed by T1 (5.5%), T5 (5.8%), T3 (8.3%), T6 (8.3%), T4 (13.3%), and T2 (15.8%) treatments. Continuous supplementation of Ca/Cu/SA was found to be the most effective in controlling the disease and the high performance liquid chromatography results showed the detection of ergosterol at very low concentration in the treated samples. Moreover, the transmission electron microscopy analysis results clearly indicated that T7 treatment was also enhancing lignification, which was responsible for the thickness of the secondary cell walls and middle lamella compared to untreated samples. It was therefore, concluded that continuous supplementation of minerals nutrients and SA could effectively suppress disease severity by reducing ergosterol activity and also improve the process of lignification in the treated plants. Furthermore, this treatment also managed to delay the onset of BSR symptoms and promote the growth of the seedlings and eventually suppress the BSR disease.
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