Search

Your search keyword '"Ong-Abdullah, Janna"' showing total 37 results
Start Over Author "Ong-Abdullah, Janna"
37 results on '"Ong-Abdullah, Janna"'

11. Bamboo for biomass energy production

Author

Ku Aizuddin, Ku Nur Azwa, primary, Lai, Kok-Song, additional, Baharum, Nadiya Akmal, additional, Thau Lym Yong, Wilson, additional, Ngi Hoon, Lau, additional, Abdul Hamid, Mohd Zahir, additional, Cheng, Wan Hee, additional, and Ong Abdullah, Janna, additional

Published
2022
Full Text
View/download PDF

18. Vandachostylis‘Sri-Siam’: an intergeneric hybrid with superior qualities as evidenced by its biochemical fragrance and transcriptome profiles

Author

Mohd-Hairul, Ab Rahim, Ong-Abdullah, Janna, Song, Adelene Ai-Lian, Foo, Hooi Ling, Namasivayam, Parameswari, and Rahim, Raha Abdul

Abstract

Vandachostylis‘Sri-Siam’ is a fragrant orchid, suitable as a potted plant for the floriculture and perfumery industries due to its sweet citrus-like fragrance. Fragrance from the flowers was captured using SPME and subjected to GC–MS analysis. A transcriptome library was constructed from the tepals for sequencing using the Illumina MiSeq Desktop Sequencer and for de novo assembly using the CLC Genomic Workbench version 6.0. All de novo assembly sequences were subjected to bioinformatics analyses including BLASTx analysis, functional annotations and mapping of the annotated genes/gene products to the KEGG database using the Blast2go Pro software. GC–MS analysis reveals the fragrance are dominated by 68.73% monoterpenes, 11.26% esters, 4.20% sesquiterpenes and traces of alcohols (1.20%), dissimilar to both its parents. Analysis of the de novo assembly sequences generated 45,585 contigs which identified 14 fragrance-related transcripts. Information on the fragrance constituents and fragrance-related transcripts is deemed important as a reference for current and future work of using this hybrid in the breeding process of commercially valuable fragrant orchids.

Published
2022
Full Text
View/download PDF

21. Volatile constituents and floral transcriptome analyses provide new insights into fragrance biosynthesis of Vanda 'Tan Chay Yan'.

Author

Mohd-Hairul, Ab. Rahim, Ong Abdullah, Janna, Song, Adelene Ai Lian, Foo, Hooi Ling, Namasivayam, Parameswari, and Rahim, Raha Abdul

Subjects
*TRANSCRIPTOMES, *FLORICULTURE industry, *FOOD aroma, *BIOSYNTHESIS, *GENE mapping, *SESQUITERPENES
Abstract

Vanda 'Tan Chay Yan', a beautiful golden-orange orchid with mild fragrance, is valuable in the floral industry. In this study, the volatile compounds from the flowers were profiled and a transcriptome library was created to search for fragrance-related transcripts. Volatiles from the tepals were captured using a SPME device with PDMS-coated fibre for GC-MS analysis. A transcriptome library was constructed and sequenced using the Illumina MiSeq Desktop Sequencer, de novo assembled using CLC Genomic Workbench version 6.0. BLASTx analysis, functional annotations and gene mapping of the annotated genes to the KEGG database were carried out using the Blast2go Pro software. Twelve compounds were identified in the volatiles including monoterpenes (93.19%), sesquiterpenes (4.32%) and traces of other compounds (2.49%) whereby cis-β-ocimene topped the list as the major constituent (88.41%). De novo assembly of the transcriptome generated a total of 34,027 sequences from which 20 fragrance-related transcripts in the terpenoid and benzenoid/phenylpropanoid biosynthetic pathways were identified. Combined information garnered from the volatiles and fragrance-related transcripts highlights the basic information on the fragrance constituents and biosynthetic pathways of this orchid which are useful for orchid breeders in selection of parents for new hybrids with fragrance as their value-added characteristic for the floriculture industry. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

32. Ability of Ipomoea aquatica Forssk. to Remediate Phenol in Water and Effects of Phenol on the Plant's Growth.

Author

Siew-Yi Lee, Ahmad, Siti Aqlima, Mustapha, Siti Roslina, and Ong-Abdullah, Janna

Subjects
IPOMOEA aquatica, PHYTOREMEDIATION, EFFECT of pollution on plants, PHENOLS & the environment, PLANT growth
Abstract

Despite wide applications in industries, phenol pollution leads to many health effects, and one of the technologies used to clean up phenol pollution is phytoremediation. The aim of this research was to assess the remediation ability of Ipomoea aquatica Forssk., which is easy to handle and and has a fast growth rate. Plantlet was grown in water spiked with 0.05, 0.10, 0.20, 0.30 and 0.40 g/L phenol, followed by daily observation of the plantlets morphology and tracking of phenol concentration in the water and plantlet extracts via 4-aminoantipyrine (4-AAP) assay. Plantlet's roots in 0.10 g/L phenol (57.42 ± 1.41 mm) were significantly longer (p < 0.05) than those of the control plantlets (43.57 ± 3.87 mm) in contrast to other phenol concentrations which had stunted roots growth. I. aquatica Forssk. was able to survive with 0.30 g/L phenol despite exhibiting yellowing of leaves and increased sensitivity to scarring on the stems. The plantlets were able to completely remove the phenol from the water spiked with phenol at 0.05 g/L after 12 days of growth. However, the highest average rate of phenol removal was 0.021 g/L/day from water spiked with 0.30 g/L phenol. Phenol analysis on the plantlets' extracts revealed that I. aquatica Forssk. had degraded the absorbed phenol. This observation is of significant interest as it highlights the potential of I. aquatica Forssk. for use as a phytoremediator to clean up phenol contaminated water. [ABSTRACT FROM AUTHOR]

Published
2017

37. Effects of Flower and Fruit Extracts of Melastoma malabathricum Linn. on Growth of Pathogenic Bacteria: Listeria monocytogenes, Staphylococcus aureus, Escherichia coli, and Salmonella typhimurium.

Author

Che Omar SN, Ong Abdullah J, Khairoji KA, Chin Chin S, and Hamid M

Abstract

Melastoma malabathricum Linn. is a shrub that comes with beautiful pink or purple flowers and has berries-like fruits rich in anthocyanins. This study was carried out with the aim to evaluate the inhibitory activities of different concentrations of the M. malabathricum Linn. flower and fruit crude extracts against Listeria monocytogenes IMR L55, Staphylococcus aureus IMR S244, Escherichia coli IMR E30, and Salmonella typhimurium IMR S100 using the disc diffusion method. The lowest concentrations of the extracts producing inhibition zones against the test microorganisms were used to determine their minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs). In addition, the growth of Listeria monocytogenes IMR L55 and Staphylococcus aureus IMR S244 grown in medium supplemented with the respective extracts at different temperatures (4°C, 25°C, and 37°C) and pHs (4, 6, 7, and 8) was determined.

Published
2013
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results