alexa Aromatic Hydrocarbon Degrading Fungi Inhabiting the Phyllosphere of Ornamental Plants on Roadsides of Urban Areas in Sri Lanka
ISSN: 2155-6199

Journal of Bioremediation & Biodegradation
Open Access

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Research Article

Aromatic Hydrocarbon Degrading Fungi Inhabiting the Phyllosphere of Ornamental Plants on Roadsides of Urban Areas in Sri Lanka

Undugoda LJS, Kannangara S* and Sirisena DM
Department of Botany, Faculty of Science, University of Kelaniya, Kelaniya, Sri Lanka
*Corresponding Author : Kannangara S
Department of Botany, Faculty of science
University of Kelaniya, Kelaniya, Sri Lanka
E-mail: [email protected]
Received November 23, 2015; Accepted January 22, 2016; Published January 31, 2016
Citation: Undugoda LJS, Kannangara S, Sirisena DM (2016) Aromatic Hydrocarbon Degrading Fungi Inhabiting the Phyllosphere of Ornamental Plants on Roadsides of Urban Areas in Sri Lanka. J Bioremed Biodeg 7:328. doi: 10.4172/2155-6199.1000328
Copyright: © 2016 Undugoda LJS, et al. This is an open-a ccess article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

highly abundant on roadsides of five polluted areas in Sri Lanka (Colombo Fort, Maradana, Orugodawattha, Panchikawattha and Sapugaskanda) were rich in aromatic hydrocarbon (AH) degrading phyllosphere fungi compared to the plants from the less polluted site. HPLC results revealed significantly higher concentrations of phenanthrene, naphthalene, toluene and xylene concentrations in the phyllosphere of these plants collected from the five polluted sites, promoting the colonization of AH degrading fungal population. In fact, the phyllosphere of Ixora chinensis collected from Colombo Fort had the highest AH degrading fungal population. Also the phyllosphere of these plants had the highest phenanthrene (96.1 ng/g), naphthalene (160 ng/g), toluene (85.66 ng/g) and xylene (54.39 ng/g) concentrations. Thirty eight such fungal strains were isolated from the leaves of four ornamental plants collected from the above five polluted sites. Plate assay results showed, out of them twenty four phyllosphere fungal strains had at least one AH compound utilization ability. However, according to the HPLC and colorimetric assays, only nineteen fungal strains had the AH degradation ability. Then the best AH degrading phyllosphere fungi were identified into species levels (Penicilliumoxalicum, Aspergilllus aculeatus, Aspergillus oryzea and Colletrotrichum siamense) using molecular techniques followed by PCR amplification, amplicons sequencing and BLASTN search. Penicillium oxalicum was the best naphthalene and phenanthrene degrader with 80% and 96% degradation abilities respectively. Significantly higher toluene degradation was demonstrated by Aspergilllus aculeatus. Colletrotrichum siamense showed the significantly highest xylene degradation ability (68.9%). These fungi were the dominant species in the highly polluted sites, Maradana and Colombo Fort.

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