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Pregled bibliografske jedinice broj: 947576

Evaluation of algae farming using Chlorella bioassay


Ivšić, Martina; Kovačević, Goran
Evaluation of algae farming using Chlorella bioassay // Croatian journal of fisheries. Ribarstvo (2018) (znanstveni, prihvaćen)


Naslov
Evaluation of algae farming using Chlorella bioassay

Autori
Ivšić, Martina ; Kovačević, Goran

Vrsta, podvrsta
Radovi u časopisima, -, znanstveni

Izvornik
Croatian journal of fisheries. Ribarstvo (2018)

Status rada
Prihvaćen

Ključne riječi
Endosymbiosis ; green hydra ; in vitro ; morphometry ; ecotoxicology ; iron

Sažetak
Algae are gaining attention for their application in aquaculture as a highly sustainable source of useful products. As microalgae have a significant role in primary production in aquatic ecosystems and are the basis of many food chains, it is important to understand the processes that provide them with better survival in a toxicant-polluted environment. In this study Chlorella bioassay was evaluated: (1) as a potential method for algae farming, (2) as a method for testing advantages or disadvantages of symbiotic association, including two species of aposymbiotic algae, i.e. endosymbiotic algae isolated from green hydra (Mychonastes homosphaera (Skuja) Kalina and Punčochářová and Desmodesmus subspicatus (Chodat) Hegewald and Schmidt) and two related free-living algal species (Chlorella kessleri Fott and Novak. [K&H, 1992] and C. vulgaris Beij. [K&H, 1992]), (3) through algal bioindicator’s response related to comparative toxicity and ecotoxicological pollution of iron, and (4) by using algal bioindicators for microscopical and morphometrical application in environmental stress. Increasing concentrations of iron led to cell changes (dry dotted clusters of dying cells, intensive green wet bubbles representing a mucous structure, area, diameter and length), deformations (empty cells, aberrant divisions, irregular coenobia, tetrads and transitional forms) and ultrastructural changes (chloroplasts and nuclei). All modifications were more pronounced in aposymbiotic algae, suggesting lower degree of adaptation to iron toxicity than their free-living relatives. A free-living species C. kessleri showed the best ability to survive in given unfavorable environmental conditions. High statistical significance was noticed in the cell divisions parameter, underlining the hormetic effect of increasing the biomass in free-living algal species. This increasing of the cell divisions at the specific concentration of iron demonstrated that Chlorella bioassay may represent a useful tool for evaluating the growth of different microalgal species, and has a prospective application in a comparative study of algae farming.

Projekt / tema
119-1193080-1214 - Molekularna filogenija, evolucija i simbioza slatkovodnih beskralježnjaka (Mirjana Kalafatić)

Izvorni jezik
Engleski

Znanstvena područja
Biologija

Ustanove
Prirodoslovno-matematički fakultet, Zagreb

Indeksiranost časopisa:


  • Scopus