Effects of copper and cadmium ions on the physicochemical properties of lipids of the marine bacterium Pseudomonas putida IB28 at different growth temperatures

Popova, Olga; Sanina, N. M.; Likhatskaya, G. N.; Bezverbnaya, I. P.

doi:10.1134/s1063074008030073

Cited by 15 publications

(9 citation statements)

References 35 publications

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“…Outcomes of population microcosm bioassays revealed a general pattern in FA alterations: increase of SFAs and decrease of MUFAs, PUFAs and HUFAs. The same pattern was observed by other authors when communities of marine bacteria were exposed to copper(II) sulphate and copper(II) chloride (De Carvalho, 2012;Popova et al, 2008) and the marine macroalgae Gracilaria tenuistipitata to copper sulphate(II) pentahydrate (Pinto et al, 2011).…”

Section: Discussionsupporting

confidence: 67%

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Biochemical and toxicological effects of organic (herbicide Primextra® Gold TZ) and inorganic (copper) compounds on zooplankton and phytoplankton species

et al. 2016

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a b s t r a c tIn Europe, mainly in the Mediterranean region, an intensive usage of pesticides was recorded during the past 30 years. According to information from agricultural cooperatives of the Mondego valley (Figueira da Foz, Portugal), Primextra ® Gold TZ is the most used herbicide in corn crop fields and one of the 20 best-selling herbicides in Portugal. Copper is mainly used in pesticide formulations. This study aims to determine the ecotoxicological and biochemical (namely fatty acid profiles) effects of the herbicide Primextra ® Gold TZ and the metal copper on marine plankton. The organisms used in this study are three planktonic species: the marine diatom Thalassiosira weissflogii, the estuarine copepod Acartia tonsa and nauplii of the marine brine shrimp Artemia franciscana. Fatty acids (FAs) are one of the most important molecules transferred across the plant-animal interface in aquatic food webs and can be used as good indicators of stress. The conducted lab incubations show that T. weissflogii is the most sensitive species to the herbicide followed by A. tonsa (EC 50 = 0.0078 mg/L and EC 50 = 0.925 mg/L, respectively), whereas the copepod was the most sensitive species to the metal followed by T. weissflogii (EC 50 = 0.234 mg/L and EC 50 = 0.383 mg/L, respectively). A. franciscana was the most tolerant organism both to the herbicide and to the metal (EC 50 = 20.35 mg/L and EC 50 = 18.93 mg/L, respectively). Changes in the FA profiles of primary producer and primary consumers were observed, with the increase of saturated FA and decrease of unsaturated FA contents, especially of highly unsaturated FAs that can be obtained mainly from food and therefore are referred to as 'essential FA'. The study suggests that discharges of Primextra ® Gold TZ or other pesticides mainly composed by copper may be a threat to plankton populations causing changes in the FA contents and thus in their nutritive value, with severe repercussions for higher trophic levels and thus the entire food web.

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Section: Discussionsupporting

confidence: 67%

“…The increase in FA saturation could be a response of the organism's cells to promote the stability of the lipid membranes (Popova et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Biochemical and toxicological effects of organic (herbicide Primextra® Gold TZ) and inorganic (copper) compounds on zooplankton and phytoplankton species

et al. 2016

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“…Our results are in good agreement with the published data on the increase in the membrane perme ability to Na + and K + ions in the presence of Ag + [34], as well as on the induction of phase separation in the lipid bilayer in vivo by copper, another member of sub group IB [35].…”

Section: Resultssupporting

confidence: 95%

The effects of silver nitrate on the phase state of model multibilayer membranes

et al. 2015

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To investigate the effects of silver nitrate (AgNO 3 ) on model lipid membranes, we studied multi bilayer membranes based on L α dipalmitoylphosphatidylcholine (DPPC) and AgNO 3 aqueous solutions in a wide concentration range (up to 30 wt %) using differential scanning calorimetry. It was shown that the pres ence of AgNO 3 leads to both an increase in the main phase transition temperature (T m ) of DPPC multibilay ers and the appearance of an additional phase transition peak ( ), suggesting an increase in both the density and heterogeneity of the lipid bilayer. Since the effect of nitrate ions ( ) was of the opposite nature (bilayer fluidizing), the integral effect of AgNO 3 can be explained solely by the effect of silver ions (Ag + ). With increasing AgNO 3 concentration, the tendency to opposite changes in T m and peak intensity was observed, so that at approximately 26 wt % AgNO 3 the initial peak (T m ) disappeared. In the range of thera peutic Ag + concentrations (up to 2 wt %), no significant changes in the phase state of model membranes were observed. This can be one of the causes of the absence of a damaging effect of silver containing drugs on the host cells against the background of a pronounced bactericidal effect.

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“…Since synthesizing of PUFAs and HUFAs becomes too energetically costly, the organism may not complete the elongation processes presenting higher concentrations of SFAs and MUFAs in the FA composition. The increase in saturation level can also be explained by a cellular response toward the osmotic shock, an attempt to maintain the stability of lipid membranes [49] and as such maintain the osmotic pressure from cell damaging. A low concentration of HUFA in general may also occur due to the high sensitiveness of this FA group to environmental fluctuations and to cell stress.…”

Section: Resultsmentioning

confidence: 99%

Fatty Acids’ Profiles of Aquatic Organisms: Revealing the Impacts of Environmental and Anthropogenic Stressors

Gonçalves¹,

Marques²,

Gonçalves³

2017

Fatty Acids

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There is a great concern about the impacts of climate changes namely due to salinity seawater and temperature alterations in aquatic organisms with the estuarine and coastal environments being the major affected areas. The intensive usage of chemicals in an indiscriminate way in agriculture practices, achieving, in some cases, values above the limits of contamination authorized by the European legislation, also drastically affects the surrounded estuarine areas with profound consequences to the water quality and the aquatic communities. It is known that stressors affect organisms' physiological conditions with recent works concerning alterations in the fatty acid (FA) profiles associated with environmental and contamination events that become more frequent. FA plays a key role in immune and physiological functions and is associated with the prevention of some diseases, shown to be good bio-indicators to assess the organisms' impacts under stress conditions. Thus, this chapter proposes to address natural (salinity and temperature) and chemical (herbicide and metal) stressors' impacts in the FA profiles of Thalassiosira weissflogii and Cerastoderma edule and infers about the effects on organisms' physiological processes and along the food web. Consequences in food resources and to healthier and nutritious food consumption with benefits to human beings are also assessed.

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Effects of copper and cadmium ions on the physicochemical properties of lipids of the marine bacterium Pseudomonas putida IB28 at different growth temperatures

Cited by 15 publications

References 35 publications

Biochemical and toxicological effects of organic (herbicide Primextra® Gold TZ) and inorganic (copper) compounds on zooplankton and phytoplankton species

Biochemical and toxicological effects of organic (herbicide Primextra® Gold TZ) and inorganic (copper) compounds on zooplankton and phytoplankton species

The effects of silver nitrate on the phase state of model multibilayer membranes

Fatty Acids’ Profiles of Aquatic Organisms: Revealing the Impacts of Environmental and Anthropogenic Stressors

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