Naslov
Algal cells under heavy metal stress: physiological and morphological response

Autori
Mišić Radić, Tea ; Čačković, Andrea

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Molecular Biophysics: ABC of the puzzle of Life, 3rd COST Action Plenary Meeting CA 15126 / - , 2019, 109-110

Skup
3rd COST Action Plenary Meeting CA 15126

Mjesto i datum
Zagreb, Hrvatska, 18.03.2019. - 20.03.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
algal cells ; heavy metal

Sažetak
Heavy metals can cause diverse negative impacts on marine ecosystems including impact on the major primary producer and the base of the food web – algae. The impact of cadmium on lightly silicified marine diatom Cylindrotheca closterium was studied. C. closterium cultures were exposed to 0-1000 µg L-1 Cd and growth dynamics was followed with optical microscope using haemocytometer. The increased cadmium concentrations form 1 to 1000 µg L-1 in C. closterium cultures induced decrease of specific growth rates in exponential growth phase. Morphological changes on the cell surface of C. closterium exposed to cadmium were characterized at the nanoscale using atomic force microscope (AFM). The morphological changes were observed as irregular patterns of silica spheres on more silicified parts of the cell, girdle band and around the raphe of the cells that grew at 1000 µg L-1. Cadmium uptake clearly affected the biosilica formation mechanism in C. closterium, most probably by interfering in biological and physicochemical processes involved in diatom biosilification.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Biologija, Interdisciplinarne prirodne znanosti

POVEZANOST RADA