Effects of ocean acidification on the growth and biochemical composition of a green alga (Ulva fasciata) and its associated microbiota
| Autor: | Heba S. El-Sayed, Mohamed A. El-Sheikh, Mostafa E. Elshobary, Sarah Al-Rashed, Khouloud M. Barakat, Ibrahim A. Arif, Hanan M. Khairy |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
biology
QH301-705.5 Fish farming Microbiota Ocean acidification Metabolism Growth Protein profile Carbohydrate biology.organism_classification chemistry.chemical_compound Pigment chemistry Algae visual_art Carbon dioxide Ulva fasciata visual_art.visual_art_medium Marine ecosystem Food science Biology (General) General Agricultural and Biological Sciences pCO2 levels |
| Zdroj: | Saudi Journal of Biological Sciences, Vol 28, Iss 9, Pp 5106-5114 (2021) |
| Popis: | In marine ecosystems, fluctuations in surface-seawater carbon dioxide (CO2), significantly influence the whole metabolism of marine algae, especially during the early stages of macroalgal development. In this study, the response of the green alga Ulva fasciata for elevating ocean acidification was investigated using four levels of pCO2 ∼280, 550, 750 and 1050 µatm. Maximum growth rate (6.6 % day-1), protein (32.43 %DW) and pigment (2.9 mg/g) accumulation were observed at pCO2-550 with an increase of ∼2-fold compared to control. On the other hand, lipid and carbohydrate contents recorded their maximum production (4.23 and 46.96 %DW, respectively) at pCO2-750 while control showed 3.70 and 42.37 %DW, respectively. SDS-PAGE showed the presence of unique bands in response to pCO2, especially at 550 µatm. Dominant associated bacteria was shifted from Halomonas hydrothermalis of control to Vibrio toranzoniae at pCO2-1050. These findings suggest that ocean acidification at 550 µatm might impose noticeable effects on growth, protein, pigments, and protein profile of U. fasciata, which could be a good source for fish farming. While, pCO2-750 was recommended for energetic purpose, due to its high lipid and carbohydrate contents. |
| Databáze: | OpenAIRE |
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