Naslov
Symbiotic and asymbiotic Chlorella in a toxic environment

Autori
Kovačević, Goran ; Kalafatić, Mirjana ; Ljubešić, Nikola ; Jelenčić, Biserka

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

Izvornik
Phycologia 44/4 Suppl. Abstracts of papers to be presented at the 8th International Phycological Congress / Hiroshi Kawai - Durban : International Phycological Society, 2005

Skup
8 IPC- 8th International Phycological Congress

Mjesto i datum
Durban, Južnoafrička Republika, 13.08.2005. - 19.08.2005

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Chlorella; symbiosis; chloroplasts; evolution; ecotoxicology; green hydra

Sažetak
The effect of norflurazon on endosymbiotic Chlorella vulgaris Beij. [K&H, 1992] from green hydra (Hydra viridissima Pallas, 1766) and asymbiotic Chlorella kessleri Fott et Novak. [K&H, 1992] was researched on evolutionary and ecotoxicological level. With this work we tried to obtain the information about difference between high-related algae in symbiosis and out of it and to observe the differences of the effect of toxicant upon them. Norflurazon causes the 'bleaching effect' upon the newly developed chloroplasts. Organisms were treated with aqueous solutions of norflurazon (2x10-5, 2x10-6, 2x10-7 mol/L) in glass dishes, and in tubes on deep stock agar for 21 days in the laboratory conditions. Cytological and ultrastructural changes were observed with binocular light microscope and TEM. Of special significance were the antichloroplastal effect and damages to the thylakoidal system, which were increased with the higher concentration of toxicant. Newly developed buds in symbiotic green hydra were not bleached, and therefore neither were endosymbiotic algae. The 'bleaching effect' was present only in algae out of symbiosis, with deleterious effect upon algal chloroplasts. This could suggest that endosymbiotic alga could have some level of resistance to toxicants or could even support the idea that Chlorella from green hydra could present the separate species of algae.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA