Influence of Algae Age and Population on the Response to TiO2 Nanoparticles

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Metzler D. M., Erdem A., Huang C. P.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH, cilt.15, sa.4, 2018 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 4
  • Basım Tarihi: 2018
  • Doi Numarası: 10.3390/ijerph15040585
  • Dergi Adı: INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Social Sciences Citation Index (SSCI), Scopus
  • Anahtar Kelimeler: algae age, lipid peroxidation, chlorophyll, TiO2 nanoparticles, TITANIUM-DIOXIDE NANOPARTICLES, DAPHNIA-MAGNA, ENGINEERED NANOMATERIALS, OXIDATIVE STRESS, FRESH-WATER, RISK-ASSESSMENT, ACUTE TOXICITY, PHOTOTOXICITY, AGGREGATION, MICROALGAE
  • Akdeniz Üniversitesi Adresli: Evet

Özet

This work shows the influence of algae age (at the time of the exposure) and the initial algae population on the response of green algae Raphidocelis subcapitata to titanium dioxide nanoparticles (TiO2 NPs). The different algae age was obtained by changes in flow rate of continually stirred tank reactors prior to NP exposure. Increased algae age led to a decreased growth, variations in chlorophyll content, and an increased lipid peroxidation. Increased initial algae population (0.3-4.2 x 106 cells/mL) at a constant NP concentration (100 mg/L) caused a decline in the growth of algae. With increased initial algae population, the lipid peroxidation and chlorophyll both initially decreased and then increased. Lipid peroxidation had 4 x the amount of the control at high and low initial population but, at mid -ranged initial population, had approximately half the control value. Chlorophyll a results also showed a similar trend. These results indicate that the physiological state of the algae is important for the toxicological effect of TiO2 NPs. The condition of algae and exposure regime must be considered in detail when assessing the toxicological response of NPs to algae.