Naslov
How Phytoplankton Membranes Cope With Steep Ionic Strength (Salinity) Gradient?

Autori
Gašparović, Blaženka ; Novak, Tihana ; Čanković, Milan ; Ljubešić, Zrinka ; Hrustić, Enis ; Zhu, Zhuoyi ; Zhang, Ruifeng ; Du, Jinzhou

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

Izvornik
Ocean Sciences Meeting 2016 : On-line book of abstracts / - , 2016

Skup
Ocean Sciences Meeting 2016

Mjesto i datum
New Orleans (LA), Sjedinjene Američke Države, 21.02.2016. - 26.02.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
phytoplankton ; lipid ; salinity stress

Sažetak
We report on phytoplankton accommodation on stressful conditions being steep ionic strength, i.e. salinity, changes, the conditions regularly found in the estuaries. We aimed defining how lipid composition of phytoplankton membrane structure is accommodated to prevent spontaneous osmosis. Salinity-dependent lipid profiles for particulate lipid extracts from blooming periods of the two opposing estuaries: eutrophic and polluted Wenchang River Estuary and pristine oligotrophic/mesotrophic Krka River Estuary were characterized by thin layer chromatography (TLC). The composition of phytoplankton pigments which was analyzed by high performance liquid chromatography. Domination of pigment Fucoxanthin in both estuaries indicates diatoms were major blooming group. While total particulate lipid concentration was almost an order of magnitude higher in the Wenchang River estuary (on average 238 µg/L) than in the Krka River Estuary (on average 36 µg/L), the lipid composition was similar. This implies that salinity stress is the main influential factor on phytoplankton lipid composition rather than availability of nutrients. Details on the lipid composition that follow salinity changes will be discussed.

Izvorni jezik
Engleski

Znanstvena područja
Interdisciplinarne prirodne znanosti

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