Porphyridium purpureum microalga physiological and ultrastructural changes under copper intoxication

Markina Z., Orlova T. Y., Vasyanovich Y. A., Vardavas A., Stivaktakis P. D., Vardavas C., ...More

TOXICOLOGY REPORTS, vol.8, pp.988-993, 2021 (ESCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 8
  • Publication Date: 2021
  • Doi Number: 10.1016/j.toxrep.2021.04.015
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus, BIOSIS, EMBASE, Food Science & Technology Abstracts, Directory of Open Access Journals
  • Page Numbers: pp.988-993
  • Keywords: Copper, Porphyridium purpureum, Rhodophyta, Fluorescence, Photosynthetic pigments, Reactive oxygen species, Ultrastructure, Aquatic pollution, GREEN-ALGA, TOXICITY, GROWTH, PHOTOSYNTHESIS, NANOPARTICLES, CADMIUM, METALS, LEAD
  • Istanbul University Affiliated: Yes


The present work assessed the effect of copper (Cu) on cell dynamics and structure of the microalga Porphyridium purpureum (Rhodophyta, Bangiophycidae). Ultrastructure of the microalga was investigated and fluorescence of chlorophyll a and phycoerythrin, and content of reactive oxygen species (ROS) were estimated by flow cytometry. The number of cells did not show statistically significant differences at concentrations of 50 and 100 mu g/L of Cu compared to the control, whereas 150 mu g/L of Cu inhibited population growth. The fluorescence of chlorophyll a increased following exposure to Cu 100 mu g/L and fluorescence of phycoerythrin enhanced by Cu 150 mu g/ L. There was no alteration in the above indicators at other concentrations. The content of ROS increased with increasing Cu concentration in a dose-dependent manner. The population size structure was also changed by Cu as the number of cells sized 4-6 mu m was increased in the presence of Cu, especially with Cu 150 mu g/L. Changes in the topography of thylakoids grew larger with Cu concentration.