Naslov
Morphology, physiology and phylogeny of the newly isolated Picochlorum sp strain from Adriatic Sea

Autori
Mucko, Maja ; Novak, Tihana ; Medić, Nikola ; Gašparović, Blaženka ; Peharec Štefanić, Petra ; Orlić, Sandi ; Ljubešić, Zrinka

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

Izvornik
Abstract Book of Irish Algal Reseachers Conference / - , 2018, 11-12

Skup
Irish Algal Researchers Conference

Mjesto i datum
Gaillimh, Irska, 06.09.2018. - 07.09.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
photosynthetic picoeukaryotes ; morphology ; phylogeny ; physiology ; Picochlorum ; lipids

Sažetak
Photosynthetic picoeukaryotes are smallest eukaryotic phytoplankton fraction of the world’s seas and oceans, greatly contributing in carbon fluxes, biogeochemical cycles and overall primary production. During BIOTA (Bio-tracing Adriatic Water Masses) cruise in February 2015, strain of unknown photosynthetic pico-green algae PMFPPE4 was isolated in monoclonal culture and subsequent analyses were performed in order for correct identification and biotechnology potential characterization. Strain PMFPPE4 proved to belong to genus Picochlorum (W.J.Henley, J.L.Hironaka, L.Guillou, M.A.Buchheim, J.A.Buchheim, M.W.Fawley & K.P.Fawley ) through morphology (LM and TEM), phylogeny (plastid 16S rRNA and nuclear 18S rRNA genes) and physiology characterization. Pigment composition of the strain was congruent with class Trebouxiophyceae, having chlorophyll a and b, lutein, β-carotene, violaxanthin and neoxanthin. Strain PMFPPE4 showed usual growth rate regime through steady and exponential growth and then stationary phase in a period of three weeks. After that, it was kept in dark for one month after which cells were still viable. Specific lipid composition and survival in dark conditions imply possible switch of this resilient green algae to mixotrophic lifestyle in unfavourable growth conditions. This study represents a first step in resolving the complex taxonomy of this underappreciated and taxonomically unresolved marine genus Piochlorum, as well as valuable information about this strain that could serve for further biotechnological studies.

Izvorni jezik
Hrvatski

Znanstvena područja
Biologija

POVEZANOST RADA