scholarly journals Extreme Engineering: How Antarctic Algae Adapt to Hypersalinity

2020 ◽  
Vol 183 (2) ◽  
pp. 427-428
Author(s):  
Magdalena Julkowska
Keyword(s):  
Antarctic Algae

scholarly journals PHYSIOLOGICAL AND BIOCHEMICAL CHANGES IN ALGAL CULTURES OF CHLORELLA VULGARIS AND SYNECHOCYSTIS SALINA (MESOPHILIC AND ANTARCTIC ISOLATES) OCCURING AFTER TREATMENT WITH UV-B RADIATION

2017 ◽  
pp. 73-82
Author(s):  
Dilyana Doneva ◽  
Juliana Ivanova ◽  
Lyudmila Kabaivanova
Keyword(s):  
Oxidative Stress ◽  
Chlorophyll A ◽  
Chlorella Vulgaris ◽  
Markers Of Oxidative Stress ◽  
Protective Strategies ◽  
The Antarctic ◽  
Antarctic Algae ◽  
Β Carotene ◽  
Stimulation Of

Determination of biomass production and viability of algal cells of Chlorella vulgaris and Synechocystis salina exposed to UV-B radiation were carried out in this study together with comparison of the mesophilic and antarctic isolates of both investigated strains. Estimation of the content of the pigments: chlorophyll a, chlorophyll b, β-carotene, C-phycocyanin and allo-phycocyanin in algal cells exposed to UV-B radiation was also accomplished. The obtained results showed that the antarctic algae are more resistant to oxidative stress than their mesophilic counterparts. The antarctic isolates of Ch. vulgaris and S. salina compared with the mesophilic ones - up to 72 h showed tolerance to low exposures of radiation, expressed in a slight stimulation of growth and viability of the cells. Antarctic isolates also showed greater resistance to low doses of UV-B radiation manifested by stimulation of the synthesis of chlorophyll a and β-carotene. The registered increase in the amount of C- and allo-phycocyanin in antarctic isolates of S. salina showed that they had developed protective strategies against UV-B radiation by increasing the concentration of the phycobiliproteins. As a result of increased UV-B background, in antarctic isolates, stronger antioxidant defence mechanisms are triggered, which proved the possibility of using them as markers of oxidative stress.

Antarctic Algae

Taxon ◽  
1970 ◽  
Vol 19 (2) ◽  
pp. 284
Author(s):  
F. A. S. ◽  
Jacques S. Zaneveld
Keyword(s):  
Antarctic Algae

Filamentous algal endophytes in macrophytic Antarctic algae: prevalence in hosts and palatability to mesoherbivores

Phycologia ◽  
2009 ◽  
Vol 48 (5) ◽  
pp. 324-334 ◽  
Author(s):  
Charles D. Amsler ◽  
Margaret O. Amsler ◽  
James B. McClintock ◽  
Bill J. Baker
Keyword(s):  
Antarctic Algae

Taxonomic composition of planktonic and ice algae in Antarctic waters (2006–2007 studies)

2009 ◽  
Vol 43 ◽  
pp. 36-49
Author(s):  
R. M. Gogorev
Keyword(s):  
Taxonomic Composition ◽  
Ice Algae ◽  
Number Of Species ◽  
Diverse Species ◽  
Antarctic Waters ◽  
Antarctic Algae

Plankton and ice assemblages of antarctic algae were studied in 2006-2007. Diatoms prevailed in number of species and abundance in both ice and plankton samples. Three genera Chaetoceros, Thalassiosira and Fragilariopsis were the most diverse. Species of 10 genera (Chaetoceros, Thalassiosira, Coscinodiscus, Rhizosolenia, Proboscia, Eucampia, Corethron, Odontella, Fragilariopsis, Pseudo-nitzschia) dominated in plankton. Ice flora included mainly 6 diatom genera (Fragilariopsis, Berkeleya, Nitzschia, Entomoneis, Navicula, Cylindrotheca).

Cellulosic material obtained from Antarctic algae biomass

Cellulose ◽  
2019 ◽  
Vol 27 (1) ◽  
pp. 113-126 ◽  
Author(s):  
Oscar G. Paniz ◽  
Claudio M. P. Pereira ◽  
Bruna S. Pacheco ◽  
Silvana I. Wolke ◽  
Guilherme K. Maron ◽  
...  
Keyword(s):  
Cellulosic Material ◽  
Algae Biomass ◽  
Antarctic Algae

Fatty acid trophic transfer of Antarctic algae to a sympatric amphipod consumer

2019 ◽  
Vol 31 (6) ◽  
pp. 315-316
Author(s):  
Julie B. Schram ◽  
Margaret O. Amsler ◽  
Aaron W.E. Galloway ◽  
Charles D. Amsler ◽  
James B. McClintock
Keyword(s):  
Fatty Acid ◽  
Antarctic Peninsula ◽  
Brown Algae ◽  
Trophic Transfer ◽  
Western Antarctic Peninsula ◽  
Macroalgal Species ◽  
Palmaria Decipiens ◽  
Filamentous Macroalgae ◽  
Antarctic Algae

The shallow benthos along the western Antarctic Peninsula supports brown macroalgal forests with dense amphipod assemblages, commonly including Gondogeneia antarctica (Amsler et al. 2014). Gondogeneia antarctica and most other amphipods are chemically deterred from consuming the macroalgae (Amsler et al. 2014). They primarily consume diatoms, other microalgae, filamentous macroalgae and a few undefended macroalgal species, including Palmaria decipiens (Aumack et al. 2017). Although unpalatable when alive, G. antarctica and other amphipods will consume the chemically defended brown algae Himantothallus grandifolius and Desmarestia anceps within a few weeks of death (Amsler et al. 2014).

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