Naphthalene Stress Responses of the Aquatic fern Azolla Filiculoides Lam. and Evaluation of Phytoremediation Potential


POLYCYCLIC AROMATIC COMPOUNDS, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2022
  • Doi Number: 10.1080/10406638.2022.2126505
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, Food Science & Technology Abstracts, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Azolla, biodegradation, polycyclic aromatic hydrocarbons, photosynthetic pigments, secondary metabolites, POLYCYCLIC AROMATIC-HYDROCARBONS, PHENANTHRENE, WATER, FLUORANTHENE, PLANTS, L., SEEDLINGS, REMOVAL, PEROXIDASE, MACROPHYTE
  • Istanbul University Affiliated: Yes


The present study examined the naphthalene stress responses of the aquatic fern Azolla filiculoides Lam. and evaluated its phytoremediation potential. A. filiculoides were grown in nitrogen (N)-free Hoagland containing 25, 50, and 75 mg L-1 naphthalene in the greenhouse. At 75 mgL(-1) naphthalene concentration, the percentage of plant growth and relative growth rates were 118% and 0,09 gg(-1)d(-1) respectively. Photosynthetic pigment contents increased in parallel with the increasing naphthalene concentrations on the third day. In 75 mg L-1 naphthalene, the flavonoid and phenolic contents of the plant increased as secondary metabolites compared to the control. Gas Chromatography-Mass Spectrometry analysis showed that naphthalene is absorbed, accumulated and/or biodegraded by the A. filiculoides. Percentages of biodegradation from planted samples treated with all naphthalene concentrations on day 10 were >= 94% compared to unplanted controls. Data on growth parameters, photosynthetic pigments and secondary metabolite contents, and biodegradation percentages indicated that the effective phytoremediation potential of A. filiculoides for naphthalene was <= 75 mg L-1. In conclusion, the biodegradation values of over 90% obtained in a short time from the planted samples compared to the unplanted controls showed that A. filiculoides tolerates naphthalene stress highly, is effective in its phytoremediation and can be used efficiently.