Exposure of the cyanobacterium Nostoc muscorum from Portuguese rice fields to Molinate (Ordram®): Effects on the antioxidant system and fatty acid profile

Galhano, Victor; Gomes-Laranjo, José; Peixoto, Francisco

doi:10.1016/j.aquatox.2010.11.011

Cited by 34 publications

(22 citation statements)

References 54 publications

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“…Since many estuaries are surrounded by farmland, residential and industrial areas, they are subject to various anthropogenic pressures and behaviors that cause ecological stresses, affecting not only the water quality, but also the biological communities of these ecosystems (Cardoso et al, 2008;Gonç alves et al, 2010aGonç alves et al, , 2016Smalling et al, 2013). The intensive use of pollutants in agriculture areas near ecologically valuable coastal wetlands led to the implementation of the Pesticide-Monitoring programs to recover aquatic systems, such as in the Mondego estuary, Portugal, since 1998 (Galhano et al, 2011). Nowadays, and according to the information from agricultural cooperatives of Mondego valley, the herbicide Primextra ® Gold TZ is the most used herbicide in corn crop fields and is one of the 20 best-selling herbicides in Portugal, whereas copper is mainly used in the constitution of pesticides (Gonç alves et al, 2016;Neves et al, 2015).…”

Section: Introductionmentioning

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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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: Introductionmentioning

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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“…Exposure to pesticide atrazine also increased the fatty acid saturation in C. mexicana . Cell membranes, which are structurally made up of large amounts of polyunsaturated fatty acids, are highly susceptible to the pesticide-induced oxidative stress, leading to inevitable changes in membrane fluidity and permeability (Singh et al 2002;Galhano et al 2011a). Thus, lowering the degree of fatty acid unsaturation might be an adaptive mechanisms by the algal cells against the insecticide-induced oxidative stress.…”

Section: Fatty Acid Methyl Ester (Fame)mentioning

confidence: 99%

Insecticides induced biochemical changes in freshwater microalga Chlamydomonas mexicana

Kumar

Kabra

Min

et al. 2015

Environ Sci Pollut Res

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The effect of insecticides (acephate and imidacloprid) on a freshwater microalga Chlamydomonas mexicana was investigated with respect to photosynthetic pigments, carbohydrate and protein contents, fatty acids composition and induction of stress indicators including proline, superoxide dismutase (SOD) and catalase (CAT). C. mexicana was cultivated with 1, 5, 10, 15, 20 and 25 mg L(-1) of acephate and imidacloprid. The microalga growth increased with increasing concentrations of both insecticides up to 15 mg L(-1), beyond which the growth declined compared to control condition (without insecticides). C. mexicana cultivated with 15 mg L(-1) of both insecticides for 12 days was used for further analysis. The accumulation of photosynthetic pigments (chlorophyll and carotenoids), carbohydrates and protein was decreased in the presence of both insecticides. Acephate and imidacloprid induced the activities of superoxide dismutase (SOD) and catalase (CAT) and increased the concentration of proline in the microalga, which play a defensive role against various environmental stresses. Fatty acid analysis revealed that the fraction of polyunsaturated fatty acids decreased on exposure to both insecticides. C. mexicana also promoted 25 and 21% removal of acephate and imidacloprid, respectively. The biochemical changes in C. mexicana on exposure to acephate and imidacloprid indicate that the microalga undergoes an adaptive change in response to the insecticide-induced oxidative stress.

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“…The use of agrochemicals such as inorganic fertilizers and pesticides has expanded enormously over the past decades. Consequently, surface waters and groundwater have become increasingly contaminated by plant nutrients and protection products (Galhanoa et al 2011). Pesticides are chemicals to which it particular attention needs to be paid, as most of them are dangerous to our health and environment (Travisi and Nijkamp 2008).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Groundwater Risk of Agrochemicals Based on a Modified DRASTIC Method

Zhang

Maio

Sacco

2014

Engineering Geology for Society and Territory - Volume 3

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The area under consideration in our research is the Vercelli plain, an important zone for the cultivation of rice and maize. In addition, the groundwater has been seriously contaminated by agro-activities. The goal of this study was to use GIS technology to develop maps of potential groundwater risk from agricultural activity of the Vercelli plain. The temporal trends of agrochemical concentration in groundwater were plotted. The relationship between groundwater contaminant concentration of agrochemicals and the period amount of precipitation was analyzed. The results showed that most of the shallow aquifer in Vercelli plain is at high to very high risk in terms of potential pollution. Although, there was no obvious upward or downward trend of pesticide concentration in the shallow aquifers, the change of agrochemical concentration in groundwater seems according to the level of the groundwater table.

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Exposure of the cyanobacterium Nostoc muscorum from Portuguese rice fields to Molinate (Ordram®): Effects on the antioxidant system and fatty acid profile

Cited by 34 publications

References 54 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

Insecticides induced biochemical changes in freshwater microalga Chlamydomonas mexicana

Assessment of Groundwater Risk of Agrochemicals Based on a Modified DRASTIC Method

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