Oxidative stress and antioxidant defense responses in Acartia copepods in relation to environmental factors

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http://hdl.handle.net/10138/299199

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Glippa , O , Engström-Öst , J , Kanerva , M , Rein , A & Vuori , K 2018 , ' Oxidative stress and antioxidant defense responses in Acartia copepods in relation to environmental factors ' , PLoS One , vol. 13 , no. 4 , 0195981 . https://doi.org/10.1371/journal.pone.0195981

Title: Oxidative stress and antioxidant defense responses in Acartia copepods in relation to environmental factors
Author: Glippa, Olivier; Engström-Öst, Jonna; Kanerva, Mirella; Rein, Anni; Vuori, Kristiina
Contributor: University of Helsinki, Tvärminne Zoological Station
Date: 2018-04-13
Language: eng
Number of pages: 15
Belongs to series: PLoS One
ISSN: 1932-6203
URI: http://hdl.handle.net/10138/299199
Abstract: On a daily basis, planktonic organisms migrate vertically and thus experience widely varying conditions in their physico-chemical environment. In the Gulf of Finland, these changes are larger than values predicted by climate change scenarios predicted for the next century (up to 0.5 units in pH and 5 degrees C in temperature). In this work, we are interested in how temporal variations in physico-chemical characteristics of the water column on a daily and weekly scale influence oxidative stress level and antioxidant responses in the planktonic copepod of the genus Acartia. Responses were determined from samples collected during a two-week field survey in the western Gulf of Finland, Baltic Sea. Our results showed that GST (Glutathione-S-transferase) enzyme activity increased in the surface waters between Weeks I and II, indicating antioxidant defense mechanism activation. This is most likely due to elevating temperature, pH, and dissolved oxygen observed between these two weeks. During Week II also GSSG (oxidized glutathione) was detected, indicating that copepods responded to stressor(s) in the environment. Our results suggest that Acartia copepods seem fairly tolerant to weekly fluctuations in environmental conditions in coastal and estuarine areas, in terms of antioxidant defense and oxidative stress. This could be directly connected to a very efficient glutathione cycling system acting as antioxidant defense system for neutralizing ROS and avoiding elevated levels of LPX.
Subject: XYLENOL ORANGE METHOD
HISTORY TRADE-OFFS
BALTIC SEA
OCEAN ACIDIFICATION
CLIMATE-CHANGE
ULTRAVIOLET-RADIATION
MARINE-PHYTOPLANKTON
ENZYME-ACTIVITIES
GULF
TEMPERATURE
1181 Ecology, evolutionary biology
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