Growth, photosynthetic and respiratory responses to sub-lethal copper concentrations in Scenedesmus incrassatulus (Chlorophyceae)

Perales-Vela, Hugo Virgilio; González-Moreno, Sergio; Montes-Horcasitas, Carmen; Cañizares-Villanueva, Rosa Olivia

doi:10.1016/j.chemosphere.2006.11.036

Cited by 145 publications

(90 citation statements)

References 44 publications

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“…DANIEL GONZÁLEZ-MENDOZA et al with lipid peroxidation of thylakoid membranes or with the alteration of lipid protein interactions in the chloroplast membrane, affecting the light reaction processes, especially those associated with PSII (Perales-Vela et al 2007). In vivo, the fi rst contact between copper and the plant is not directly at the chloroplast level and therefore, the mechanism of photosynthesis inhibition probably differs from that observed in vitro.…”

mentioning

confidence: 99%

Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans)

Mendoza

Gil²,

Escoboza-Garcia

et al. 2013

An. Acad. Bras. Ciênc.

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The effects of copper toxicity on the photosynthetic activities of Avicennia germinans was investigated using two CuSO 4 concentrations (0.062 and 0.33 M) added in Hoagland's solution in an aerated hydroponic system. Photosynthesis and chlorophyll fl uorescence were measured after 30 h of copper stress. Results obtained in this study show that increasing levels of Cu +2 of 0.062 and 0.33 M Cu +2 resulted in a general reduction of the stomatal conductance (28 and 18%, respectively) and 100% of inhibition of net photosynthesis. Additionally, at these concentrations of Cu +2, reductions of chlorophyll fl uorescence parameters were also observed. These changes suggested that the photosynthetic apparatus of Avicennia germinans was the primary target of the Cu +2 action. It is concluded that Cu +2 ions causes a drastic decline in photosynthetic gas exchange and Chlorophyll fl uorescence parameters in A. germinans leaves.

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mentioning

confidence: 99%

Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans)

Mendoza

Gil²,

Escoboza-Garcia

et al. 2013

An. Acad. Bras. Ciênc.

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“…This led to the increase in number of cells to be blocked. If protein in S. platensis cells is damaged then nutrient transport into the cells was inhibited, so that most of the S. platensis cells die [42].…”

Section: Resultsmentioning

confidence: 99%

ADSORPTION OF Cd AND Pb USING BIOMASS OF MICROALGAE SPIRULINA PLATENSIS

Putri¹

2017

GEOMATE

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Microalgae is one of the most common sources of biomass for heavy metal removal from wastewater. Spirulina platensis is one of Indonesia's blue-green algae species found in Indonesian waters and has the ability to adsorb heavy metals, but very little is used for metal adsorption. As a cost-effectiveness approach, S. platensis was selected in this study which aimed to determine the effectiveness of Cd and Pb uptake by S. platensis for 10 days experiment, using Dutatonic solution as microalgae growth medium. The method used was complete random sampling with 3 concentration variations and 3 repetitions on each metal. The concentration variations for Cd were 0.1, 1, 5 mg/L, and 1, 2, 4 mg/L for Pb. The optimum adsorption concentration was tested by AAS. Biomass and cell size (length and width) were also measured to understand the physiological effects of Cd and Pb exposure on S. platensis. The results showed that Cd was more effectively adsorbed by S. platensis than Pb which reached 91.8% (day 5) at concentrations of 1 mg/L Cd and 84.3% (day 5) at concentrations of 1 mg/L Pb. The biomass and cell size of S. platensis were not influenced by the variation of Cd concentration (p>0.05), while Pb was significantly at the 5% significance level (p <0.05). It can be assumed that Pb was more toxic than Cd for S. platensis because the weight of biomass decreased in increasing Pb concentration.

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“…Toxic and excessive concentrations of essential metals were reported to bind and destabilize different proteins of both photosystem II (PS II) and I (PS I) [78] and to inhibit chlorophyll biosynthesis [79]. As a result, a reduction of photosynthetic yield [80][81][82] and chlorophyll bleaching [83][84][85] are commonly observed endpoint in metal toxicity tests with algae. Another major mode-of-action of metals in phytoplankton is the excessive cellular ROS generation.…”

Section: Mode-of-action and Multistressor Interactionsmentioning

confidence: 99%

Combined Effects of Trace Metals and Light on Photosynthetic Microorganisms in Aquatic Environment

Cheloni

2018

Environments

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Abstract:In the present review, we critically examine the state-of-the-art of the research on combined effects of trace metals and light on photosynthetic microorganisms in aquatic environment. Light of different intensity and spectral composition affects the interactions between trace metals and photosynthetic microorganisms directly, by affecting vital cellular functions and metal toxicokinetics and toxicodynamics, and indirectly, by changing ambient medium characteristics. Light radiation and in particular, the ultraviolet radiation component (UVR) alters the structure and reactivity of dissolved organic matter in natural water, which in most of the cases decreases its metal binding capacity and enhances metal bioavailability. The increase of cellular metal concentrations is generally associated with increasing light intensity, however further studies are necessary to better understand the underlying mechanisms. Studies on the combined exposures of photosynthetic microorganisms to metals and UVR reveal antagonistic, additive or synergistic interactions depending on light intensity, spectral composition or light pre-exposure history. Among the light spectrum components, most of the research was performed with UVR, while the knowledge on the role of high-intensity visible light and environmentally relevant solar light radiation is still limited. The extent of combined effects also depends on the exposure sequence and duration, as well as the species-specific sensitivity of the tested microorganisms and the activation of stress defense responses.

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Growth, photosynthetic and respiratory responses to sub-lethal copper concentrations in Scenedesmus incrassatulus (Chlorophyceae)

Cited by 145 publications

References 44 publications

Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans)

Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans)

ADSORPTION OF Cd AND Pb USING BIOMASS OF MICROALGAE SPIRULINA PLATENSIS

Combined Effects of Trace Metals and Light on Photosynthetic Microorganisms in Aquatic Environment

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