Response of intact cyanobacterial cells and their photosynthetic apparatus to Cd2+ ion treatment

Title:

Response of intact cyanobacterial cells and their photosynthetic apparatus to Cd2+ ion treatment

Creator:

Tůmová, E. and Sofrová, D.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:cb611518-ef43-4dc3-ad3c-037eeb217530
uuid:cb611518-ef43-4dc3-ad3c-037eeb217530
issn:0300-3604
doi:10.1023/A:1020112403728

Subject:

chlorophyll, dodecylmaltoside, heavy metals, photochemical activities, photosynthetic pigment content, photosystems 1 and 2, Synechococcus, and toxic metals

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Intact cells of Synechococcus elongatus were treated with different concentrations (0.1 and 1.0 mM = Cd0.1, Cd1.0) of CdCl2 for 24 h. Cd0.1 treatment stimulated growth of the cell culture and chlorophyll (Chl) a concentration in the culture. Cd1.0 inhibited both the above mentioned parameters. The oxygen evolving activity of intact cells (H2O → BQ) as well as of isolated thylakoid membranes, TM (H2O → DCPIP; H2O → PBQ + FeCy) decreased after 24 h of Cd1.0 cultivation to 7 %. Photosystem 1 (PS1) activity was less sensitive to the effect of Cd2+ than PS2 activity. CdCl2 concentration in cultivation media after 24 h of cultivation proved that the cyanobacterium cells take up these ions to a large extent from the cultivation medium. After 24 h of the Cd1.0 treatment only 12 % of the amount of Cd2+ originally added to the cultivation medium was found. The ratio of external-antenna pigments, phycocyanin, and allophycocyanin to Chl increased approximately twofold with growing Cd2+ concentration in the cultivation medium. This ratio was found in both TM and dodecylmaltoside extracts. and E. Tůmová, D. Sofrová.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

103-108

Source:

Photosynthetica | 2002 Volume:40 | Number:1

Harvested from:

CDK

Metadata only:

false