Growth, photosynthesis and antioxidant responses of two microalgal species, Chlorella vulgaris and Selenastrum capricornutum, to nonylphenol stress

Gao, Q.T.; Tam, N.F.Y.

doi:10.1016/j.chemosphere.2010.10.010

Cited by 103 publications

(23 citation statements)

References 46 publications

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“…The present study revealed that mixed PAHs alone did not have any significant effect on the growth of free S. capricornutum cells but induced the production of reduced GSH and POD activities. Similarly, these two antioxidant responses of S. capricornutum were stimulated by nonylphenol [41], while PYR enhanced the GSH content of four freshwater microalgae, C. vulgaris, Scenedesmus platydiscus, Scenedesmus quadricauda, and Selenastrum capricornutum, but had no effect on their SOD activities [11]. The combined effects of PAHs and heavy metals on free S. capricornutum cells in the present study were more significant than those of a single group of contaminants.…”

Section: Toxicity Of Cocontamination To Free Microalgae and Interactisupporting

confidence: 47%

Combined toxicity of polycyclic aromatic hydrocarbons and heavy metals to biochemical and antioxidant responses of free and immobilized Selenastrum capricornutum

Wang¹,

Luo²,

Lin³

et al. 2013

Enviro Toxic and Chemistry

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Abstract-The aquatic environment often contains different groups of contaminants, but their combined toxicity on microalgae has seldom been reported. The present study compared the toxic effects of combined mixed polycyclic aromatic hydrocarbons (PAHs) and heavy metals on growth and antioxidant responses of free and immobilized microalga, Selenastrum capricornutum. Five PAHsphenanthrene, fluorene, fluoranthene, pyrene, and benzo[a]pyrene-and four heavy metals at different concentrations-0.05 to 0.1 mg Cd 2þ ml À1 , 0.05 to 1 mg Cu 2þ ml À1 , 0.05 to 1 mg Zn 2þ ml À1 , and 0.5 to 2.5 mg Ni 2þ ml À1 -were examined. Results showed that the chlorophyll a content of free and immobilized S. capricornutum was not affected by PAHs but was significantly inhibited by heavy metals. Conversely, the antioxidant parameters, including the content of reduced glutathione (GSH) and the activities of superoxide dismutase and peroxidase, were significantly induced by both PAHs and metals. For the combined toxic effects of PAHs and heavy metals, cell growth and antioxidant responses varied with exposure time and contaminants and differed between free and immobilized cells. The effects of cocontaminants on the GSH content in free cells were mainly synergistic but changed to antagonistic in immobilized cells. The toxic effects of cocontamination on free cells were also more obvious than those on immobilized cells. These findings suggest that immobilization offers some protection to microalgal cells against toxic contaminants causing differences in the interaction and responses to combined toxicants between free and immobilized cells. Immobilized cells might be more suitable for treating wastewater containing toxic contaminants than free cells. Environ. Toxicol. Chem. 2013;32:673-683. # 2012 SETAC

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Section: Toxicity Of Cocontamination To Free Microalgae and Interactisupporting

confidence: 47%

Combined toxicity of polycyclic aromatic hydrocarbons and heavy metals to biochemical and antioxidant responses of free and immobilized Selenastrum capricornutum

Wang¹,

Luo²,

Lin³

et al. 2013

Enviro Toxic and Chemistry

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show abstract

“…It is known that like bacteria and fungi, algae are able to remove organic contaminants via adsorption, absorption and degradation processes (Hirooka et al, 2005;Nakajima et al, 2007;Li et al, 2009;Gao and Tam, 2011). The objectives of this study are to assess the biotransformation potential of two progestogens (progesterone and norgestrel) by two widely distributed freshwater green microalgae Scenedesmus obliquus and Chlorella pyrenoidosa, and to investigate their algal transformation mechanisms and transformation products.…”

Section: Introductionmentioning

confidence: 99%

“…Algae play an important role in the environmental fate of contaminants since they are widespread in the aquatic environment and can interact with organic and inorganic substances (Field et al, 1998;Munoz and Guieysse, 2006;Gao and Tam, 2011;Zhou et al, 2011). It is known that like bacteria and fungi, algae are able to remove organic contaminants via adsorption, absorption and degradation processes (Hirooka et al, 2005;Nakajima et al, 2007;Li et al, 2009;Gao and Tam, 2011).…”

Section: Introductionmentioning

confidence: 99%

Biotransformation of progesterone and norgestrel by two freshwater microalgae (Scenedesmus obliquus and Chlorella pyrenoidosa): Transformation kinetics and products identification

et al. 2014

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“…The functional state of photosynthetic apparatus is a useful physiological indicator to study the sensibility of plants to environmental abiotic stress, such as salinity (Liu and Shi, 2010;Mehta et al, 2010), oil contamination (Gao and Tam, 2011), nutritional deficiency (Han et al, 2009;Lin et al, 2009;Liu and Shi, 2010), high light exposure (Cascio et al, 2010) and drought (Shao et al, 2010;Strasser et al, 2010;Tsonev et al, 2014). Under drought conditions, in vivo chlorophyll a fluorescence analyses have provided extensive information about structure and function of the photosynthetic machinery (Papageorgiou and Govindjee, 2004).…”

Section: Introductionmentioning

confidence: 99%

Physiological and photosynthetic response of quinoa to drought stress

Fghire

Anaya

Ali

et al. 2015

Chilean J. Agric. Res.

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Water shortage is a critical problem touching plant growth and yield in semi-arid areas, for instance the Mediterranean region. For this reason was studied the physiological basis of drought tolerance of a new, drought tolerant crop quinoa (Chenopodium quinoa Willd.) tested in Morocco in two successive seasons, subject to four irrigation treatments (100, 50, and 33%ETc, and rainfed). The chlorophyll a fluorescence transients were analyzed by the JIP-test to translate stressinduced damage in these transients to changes in biophysical parameter's allowing quantification of the energy flow through the photosynthetic apparatus. Drought stress induced a significant decrease in the maximum quantum yield of primary photochemistry (φP0 = Fv/Fm), and the quantum yield of electron transport (φE0). The amount of active Photosystem II (PSII) reaction centers (RC) per excited cross section (RC/CS) also decreased when exposed to the highest drought stress. The effective antenna size of active RCs (ABS/RC) increased and the effective dissipation per active reaction centers (DIo/RC) increased by increasing drought stress during the growth season in comparison to the control. However the performance index (PI), was a very sensitive indicator of the physiological status of plants. Leaf area index, leaf water potential and stomatal conductance decreased as the drought increased. These results indicate that, in quinoa leaf, JIP-test can be used as a sensitive method for measuring drought stress effects.

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Growth, photosynthesis and antioxidant responses of two microalgal species, Chlorella vulgaris and Selenastrum capricornutum, to nonylphenol stress

Cited by 103 publications

References 46 publications

Combined toxicity of polycyclic aromatic hydrocarbons and heavy metals to biochemical and antioxidant responses of free and immobilized Selenastrum capricornutum

Combined toxicity of polycyclic aromatic hydrocarbons and heavy metals to biochemical and antioxidant responses of free and immobilized Selenastrum capricornutum

Biotransformation of progesterone and norgestrel by two freshwater microalgae (Scenedesmus obliquus and Chlorella pyrenoidosa): Transformation kinetics and products identification

Physiological and photosynthetic response of quinoa to drought stress

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