Effects of selenium deficiency on the morphology and ultrastructure of the coastal marine diatom Thalassiosira pseudonana (Bacillariophyceae)

Journal Article · Sun Mar 01 04:00:00 EST 1987 · J. Phycol.; (United States)

DOI:https://doi.org/10.1111/j.1529-8817.1987.tb04422.x· OSTI ID:6409973

Doucette, G J; Price, N M; Harrison, P J

The effects of selenium deficiency on the siliceous and nonsiliceous components of the planktonic marine diatom Thalassiosira pseudonana (Hust.) Hasle and Heimdal (clone 3H) are examined using light and electron microscopy. Selenium deficiency induces elongation along the pervalvar axis initially as a result of chain formation caused by the failure of sibling cells to separate and subsequently by cell elongation via the production of hyaline girdle bands. In Se-deficient cultures cell elongation involves the blockage of both mitotic and cytokinetic components of cell division. Selenium deficiency results in ultrastructural alterations in the reticular membrane system and in mitochondrial and chloroplast membranes. Various types of inclusions are seen in vacuolar areas and the accumulation of lipid reserves is evident in Se-deficient cells. These results provide indirect evidence for a metabolic Se requirement in this algal species.

• Research Organization: Univ. of British Columbia, Vancouver
• OSTI ID: 6409973
• Journal Information: J. Phycol.; (United States), Journal Name: J. Phycol.; (United States) Vol. 23:1; ISSN JPYLA
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALGAE
BIOLOGICAL EFFECTS
CELL CONSTITUENTS
CELL MEMBRANES
CELL PROLIFERATION
CHLOROPLASTS
DIATOMS
ELEMENTS
INHIBITION
INJURIES
MEMBRANES
METABOLISM
MORPHOLOGY
NUTRITION
NUTRITIONAL DEFICIENCY
PLANT CELLS
PLANTS
SELENIUM
SEMIMETALS