Uptake of Heavy Metals by <i>Cladophora glomerata</i>

Vymazal, Jan

doi:10.1002/aheh.19900180605

Cited by 10 publications

(3 citation statements)

References 24 publications

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“…Intensity and kinetics of the bioaccumulation processes of heavy metals were also tested in laboratory conditions (SCHANZ & THOMAS, 1981;VYMAZAL 1987VYMAZAL , 1990aVYMAZAL , 1990bVYMAZAL , 1995SOBHAN & STENBERG 1999). The kinetics of accumulation of heavy metals consists of two phases; (i) the initial phase is very rapid, occurring immediately after exposure to heavy metal; usually lasting for less than 30 minutes (VYMAZAL, 1990;GENTER, 1996;WANG & DEI, 2001a).…”

Section: Table 1 Average Maximal and Minimal Values Of Measured Param...mentioning

confidence: 99%

Use of algae for monitoring of heavy metals in the River Vardar, Macedonia

Levkov¹,

Krstić²

2002

Medit. Mar. Sci.

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Aiming to resolve some of the problems regarding monitoring of heavy metals in rivers using Cladophora glomerata and epilithic algal communities, a year’s survey of Co, Cd, Cu, Fe, Mn, Pb and Zn has been conducted on the river Vardar, FY Republic of Macedonia. Obtained results and statistical analysis clearly point out the well documented possibility of using epilithon (basically diatom communities) as a monitoring tool, since correlation patterns for epilithon are either better or the same as those for Cladophora, while at the same time epilithon is much more reliable for monitoring, especially in cases when no other plant material can be obtained.

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Section: Table 1 Average Maximal and Minimal Values Of Measured Param...mentioning

confidence: 99%

Use of algae for monitoring of heavy metals in the River Vardar, Macedonia

Levkov¹,

Krstić²

2002

Medit. Mar. Sci.

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“… 9 Moreover, factors such as nutrient availability, ionization and heavy metal toxicity, which have large impacts on algal metabolism, are related to both the pH and redox potential of the environment. 10 Algae that can tolerate these conditions must have mechanisms that protect cell homeostasis and continue to produce antioxidants.…”

Section: Introductionmentioning

confidence: 99%

Role of pH on antioxidants production by Spirulina ( Arthrospira ) platensis

Ismaiel

El-Ayouty

Piercey‐Normore

2016

Brazilian Journal of Microbiology

111

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Algae can tolerate a broad range of growing conditions but extreme conditions may lead to the generation of highly dangerous reactive oxygen species (ROS), which may cause the deterioration of cell metabolism and damage cellular components. The antioxidants produced by algae alleviate the harmful effects of ROS. While the enhancement of antioxidant production in blue green algae under stress has been reported, the antioxidant response to changes in pH levels requires further investigation. This study presents the effect of pH changes on the antioxidant activity and productivity of the blue green alga Spirulina (Arthrospira) platensis. The algal dry weight (DW) was greatly enhanced at pH 9.0. The highest content of chlorophyll a and carotenoids (10.6 and 2.4 mg/g DW, respectively) was recorded at pH 8.5. The highest phenolic content (12.1 mg gallic acid equivalent (GAE)/g DW) was recorded at pH 9.5. The maximum production of total phycobiliprotein (159 mg/g DW) was obtained at pH 9.0. The antioxidant activities of radical scavenging activity, reducing power and chelating activity were highest at pH 9.0 with an increase of 567, 250 and 206% compared to the positive control, respectively. Variation in the activity of the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) was also reported. While the high alkaline pH may favor the overproduction of antioxidants, normal cell metabolism and membrane function is unaffected, as shown by growth and chlorophyll content, which suggests that these conditions are suitable for further studies on the harvest of antioxidants from S. platensis.

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“…Both pH and redox potential can exert considerable effects on metal availabilities and ionization and thus the toxicity of heavy metals (Müller and Payer, 1979;Michnowiez and Weaks, 1984;Peterson et al, 1984;Campbell and Stokes, 1985;Vymazal, 1990;Vymazal, 1995). Furthermore, metal accumulation by algae is influenced by a number of abiotic and biotic factors, one of these being pH (Vymazal, 1995).…”

Section: Introductionmentioning

confidence: 99%

Effects of Ph on Toxicity of Cadmium, Cobalt and Copper to the Green Alga Scenedesmus Bijuga

Fathi

2004

Egyptian Journal of Phycology

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This study was conducted to elucidate the effects of pH on the toxicity of cadmium, cobalt and copper to the green alga Scenedesmus bijuga. The sublethal concentrations of Cd 2+ , Co 2+ and Cu 2+ were obtained at 10-6 , 10-5 , 10-5 M, respectively. A standard initial inoculum of the tested alga was used to inoculate the culture flasks containing Kuhl's medium with different pH values (4, 6, 8, 10 and 12) supplied with the sublethal concentrations of each tested metal. The results revealed that the growth of Scenedesmus bijuga increased with increasing pH. However, the accumulation, the accumulation factor and the amount of free ionic forms of each metal decreased. Generally, it appears that the tested metals exert more toxic effect in acidic than in alkaline pH conditions.

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Uptake of Heavy Metals by Cladophora glomerata

Cited by 10 publications

References 24 publications

Use of algae for monitoring of heavy metals in the River Vardar, Macedonia

Use of algae for monitoring of heavy metals in the River Vardar, Macedonia

Role of pH on antioxidants production by Spirulina ( Arthrospira ) platensis

Effects of Ph on Toxicity of Cadmium, Cobalt and Copper to the Green Alga Scenedesmus Bijuga

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