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All Journal HAYATI Journal of Biosciences Protobiont: Jurnal Elektronik Biologi Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Microbiology Indonesia
LATIFFAH ZAKARIA
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Engineering Immunology & microbiology Medicine & Pharmacology Other

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DETEKSI Liberibacter spp. PADA JERUK SIAM BERGEJALA KLOROSIS DISERTAI BERCAK HITAM DENGAN Polymerase Chain Reaction Iliana, Iliana; Rahmawati, Rahmawati; Rachmat, Agus; Mukarlina, Mukarlina; Zakaria, Latiffah
Jurnal Protobiont Vol 9, No 1 (2020)
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/protobiont.v9i1.42703

Abstract

Liberibacter bacteria are one of the pathogenic bacteria in citrus plants. Siam Citrus Plant in Setapok Village, Singkawang City, suspected to be infected with Liberibacter spp. bacteria by showing patterns of symptoms of chlorosis accompanied by patches. This study aims to detect Liberibacter spp. on Siam Citrus leaves with symptomatic chlorosis with patches. Leaf sampling uses the roaming method in one of the citrus plantations in Setapok Village, Singkawang City. Detection of Liberibacter spp. done by PCR (Polymerase Chain Reaction) technique. Detection of bacterial DNA through several stages namely, isolation of bacterial plasmid DNA, 16S rDNA gene amplification with a thermocycler machine, and visualization using a set of electrophoresis devices. Electrophoresis results show the presence of DNA band lines, with a size of around 1100 bp for OI1 and OI2c primers, and DNA bands of 703 bp for A2 and J5 specifics. The results showed that there were Liberibacter spp. in the symptomatic chlorosis of Siam Citrus leaves accompanied by patches.
Morphological and RAPD Analysis of Fusarium Species Associated with Root and Stem Rot of Dendrobium Orchid in Northern Peninsula Malaysia LATIFFAH ZAKARIA; NUR HAYATI M.D. ZAIN; BAHARUDDIN SALLEH; MAZIAH ZAKARIA
HAYATI Journal of Biosciences Vol. 16 No. 2 (2009): June 2009
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (70.64 KB) | DOI: 10.4308/hjb.16.2.64

Abstract

A total of 29 Fusarium isolates were isolated from Dendrobium orchid showing symptoms of root and stem rots. Based on morphological characteristics, three species were identified namely, F. oxysporum, F. solani, and F. proliferatum which were recovered from root and stem rots of Dendrobium. Cluster analysis of RAPD bands clearly separated F. oxysporum, F. proliferatum, and F. solani into distinct clusters. The present studies showed that three Fusarium species were isolated from root and stem rot of Dendrobium and cluster analysis of RAPD bands was in agreement with morphological characterization of the Fusarium species from root and stem rot of Dendrobium. Key words: orchid, Fusarium, root rot, stem rot, RAPD
Antimicrobial activity of Phomopsis sp. ED2, an endophytic fungus isolated from Orthosiphon stamineus Benth Tong Woei Yenn; Darah Ibrahim; Latiffah Zakaria
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 1 (2012): Life Sciences
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (104.852 KB)

Abstract

This study aimed to investigate the antimicrobial activity of the endophytic fungus Phomopsis sp. ED2, which was previously isolated from the flower of the medicinal plant Orthosiphon stamineus Benth, in Penang, Malaysia. The 14 days-old fungal cultures were extracted with different organic solvents, include hexane, dichloromethane, ethyl acetate and butanol. The antimicrobial activities of the extracts were tested by disc diffusion assay. Based on the results, most antimicrobial compounds were present in the ethyl acetate fraction, and this extract could significantly inhibit the activity of bacteria, yeasts and fungi. The results also indicate that the antimicrobial compounds were mainly associated with the fungal biomass and all the Gram-positive test bacteria were inhibited by the ethyl acetate extract of the fungal biomass. Notably, methicillin-resistant Staphylococcus aereus exhibited a high sensitivity to the extract, with a low minimal inhibitory concentration and low minimal lethal concentration. The isolate also effectively inhibited the growth of the dermatophytes Microsporum gypseum and Trichophyton rubrum. Preliminary phytochemical screening also demonstrated that the extract contains phenols and steroids which possess antimicrobial activity. These results reveal that the endophytic fungus Phomopsis sp. is potential source of novel chemotherapeutic agents
Anti-MRSA activity of Penicillium minioluteum ED24, an endophytic fungus isolated from Orthosiphon stamineus Benth Tong Woei Yenn; Darah Ibrahim; Latiffah Zakaria
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 1 (2012): Life Sciences
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.089 KB)

Abstract

Nowadays, the medical concerns with Methicillin-resistant Staphylococcus aereus (MRSA) arised when in 2009, the proportion of S. aureus isolates that are resistant to methicilin has increased to 59.5%- 64.4% in South East Asia. Hence a new antibacterial agent from natural source is necessary to combat the infectious diseases. This study aimed to investigate the anti-MRSA activity of the endophytic fungus Penicillium minioluteum ED24, which was previously isolated from the leaf of the medicinal plant Orthosiphon stamineus Benth, in Penang, Malaysia. Methanol was used to extract the freeze-dried fungal biomass of the 14-days old fungal culture. The extract showed very significant anti-MRSA activity of disc diffusion assay with the minimal inhibitory concentration of 31.3 mg/mL and minimal lethality concentration of 250 mg/mL. Besides, 50% growth reduction of MRSA was observed at 33.2 h at the concentration of extract at MIC and 26.7 h at concentration of 2MIC. The structural degeneration of MRSA was observed by using scanning electron microscope (SEM). The SEM micrographs showed that the formation of cavities were observe on the extract treated cells and the cell wall structure of the MRSA was collapsed after treated with the fungal extract. The results suggesting that the bacterial cell wall is the target of the antibiotic compound(s) present in the extract. These results reveal that the endophytic fungus P. minioluteum ED24 a is potential source of anti-MRSA compounds
Detection of Liberibacter asiaticus causing Citrus Vein Phloem Degeneration from Siam Citrus leaves (Citrus nobilis var. microcarpa) in Singkawang City plantation, Pontianak, West Kalimantan RAHMAWATI RAHMAWATI; ILIANA ILIANA; AGUS RACHMAT; LATIFFAH ZAKARIA; MUKARLINA MUKARLINA
Microbiology Indonesia Vol. 14 No. 3 (2020): September 2020
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (962.672 KB) | DOI: 10.5454/mi.14.3.2

Abstract

The objective of the present study was to detect presence of pathogenic fastidious bacterium, Candidatus Liberibacter asiaticus using PCR from leaves of Siam citrus showing Citrus Vein Phloem Degeneration (CVPD) symptoms in Singkawang City plantation, Pontianak, West Kalimantan, Indonesia. Citrus leaf samples were collected based on visual observation of symptoms showing CVPD infection. Typical symptoms of CVPD include leaf yellowing (chlorosis), vein banding, leaves become stiff, thicker and smaller in size. The pathogenic bacterium, Candidatus Liberibacter asiaticus was detected using two specific primers, namely, OI1/ OI2c amplified 16S rRNA gene and A2/J5, amplified ribosomal protein gene of the rplKAJL-rpoBC operon (β-operon). PCR amplification detected the presence of 1100 bp band using OI1/ OI2c primers, and 703 bp band using A2/J5 primers from symptomatic Siam citrus leaves. PCR products were not detected from healthy plants serve as control. By using two sets of specific primers to amplify 16S rRNA gene and ribosomal protein gene, Candidatus Liberibacter asiaticus was detected in symptomatic Siam citrus leaves in Singkawang City, Pontianak, Indonesia. Detection of the bacterial pathogen causing CVPD is important to prevent spreading of the disease which could affect production of citrus fruits.
Co-Authors Agus Rachmat Agus Rachmat Ari Hepi Yanti BAHARUDDIN SALLEH Darah Ibrahim ILIANA ILIANA Iliana, Iliana MAZIAH ZAKARIA Mukarlina, Mukarlina NUR HAYATI M.D. ZAIN Rahmawati Rahmawati Rahmawati, Rahmawati Tong Woei Yenn Tong Woei Yenn