In vitro remobilization of Cd immobilized by fungal biomass

Kurek, Ewa; Majewska, Małgorzata

doi:10.1016/j.geoderma.2004.01.010

Cited by 11 publications

(3 citation statements)

References 21 publications

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“…Cadmium mobilized by deionized water and 0.1 M NaNO 3 solution with an ionic strength equal to the strength of soil solution is considered to be the most labile. Cadmium extracted with EDTA is strongly bound and difficult to remove by soil solution (Kurek and Majewska, 2004). The increase in Cd concentration in the medium from 1 to 10 μg ml -1 resulted in elevated amounts of Cd extracted from roots with deionized water and 0.1 M NaNO 3 , and decreased amounts of Cd extracted with 0.02 M EDTA (Fig.…”

Section: Discussionmentioning

confidence: 96%

Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in Festuca ovina Hydroponic Culture

Majewska

Słomka

2016

Polish Journal of Microbiology

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.lublin.pl IntroductionCadmium is not essential for plant, animal and human metabolism ( Van der Perk, 2006). The only known biological function of Cd has been described in marine diatoms under zinc limitation. In those conditions, a low concentration of Cd acted as a cofactor in Cd-carbonic anhydrase (Xu and Morel, 2013). Cadmium tends to be less strongly adsorbed than other divalent metals and, therefore, it is more labile in soil and more available to plants Kacál-ková et al., 2014 . In such cases, it is very important to prevent the migration of these metals to surrounding uncontaminated soils. Apart from physico-chemical stabilization (compost application, liming etc.), phytostabilization can be taken into account as a method of remediation of HM-contaminated soils (Alvarenga et al., 2008). This method is an aesthetically pleasing strategy that uses the ability of metal-tolerant plants to grow in and cover contaminated ground. Phyto stabilization consists in sequestration of metals within roots and the rhizosphere without translocating them into the above-ground plant tissues (Mendez and Maier, 2008;Ganesan, 2012;Zhang et al., 2012). Plants are colonized by endophytic and rhizospheric micro organisms which increase the resistance of their hosts to environmental stresses (Jha et al., 2013). These microorganisms can play an important role in phyto remediation of soils polluted with heavy metals (Soleimani et al., 2010) and many other, especially organic, contaminants (Gerhardt et al., 2009).Organic components of root exudates are a good source of nutrients and energy for microorganisms, hence, a microbial community living in the rhizo sphere can be 10-100 times larger than the same type of community found in bulk soil (Huang and Germina, 2002). Understanding the microbiological, biochemical and physiological aspects of phytoremediation of soil and water environments polluted to different degrees with heavy metals has very important theoretical and practical implications. In this study, a comparison was made between total cadmium concentration in root and shoot tissues as well as concentrations of particular fractions of Cd immobilized by roots of Festuca ovina (Sheep's fescue) hydroponically cultivated in nutrient solutions supplemented with 1 μg Cd ml -1 and those cultivated at 10 μg Cd ml -1 Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in Festuca ovina. After three weeks of F. ovina cultivation, the number of bacterial CFU and the amounts of organic chelators, siderophores, proteins and reducing sugars in the growth medium and on the root surface were higher at 10 than at 1 μg Cd ml -1 . The grass also reacted to the high Cd concentration by a decrease in plant growth and dehydrogenase activity in root tissues. The concentration of Cd determined in fractions bound with different strength in roots was significantly dependent on Cd concentration in the growth medium. When the plants were grown at 1 μg Cd ml -1 , 9% of the immobilized cadmium was loosely bound to the root su...

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Section: Discussionmentioning

confidence: 96%

Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in Festuca ovina Hydroponic Culture

Majewska

Słomka

2016

Polish Journal of Microbiology

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“…Also, Huang et al (2002) reported that inoculation of rhizobia increased water-soluble Zn and DTPA exchangeable Zn in sediment. However, other researches; Berthelin et al, 1990 andKurek andMajewska (2004) Trichoderma koningii biomass after a 42-day incubation was connected with a transfer of this element from this operational fraction to the most stable residual fraction. However, the role of bacteria in phosphate remediation technology needs to be carefully evaluated;…”

Section: Effect Of Phosphate and Microbial Amendments On U Removalmentioning

confidence: 91%

“…Murray et al (1983) have demonstrated the use of synthetic apatite for the retention of uranium and its daughter products from uranium mine leachates. Gauglitz et al (1992) and later Jeanjean (1995) also demonstrated the removal of soluble U by crystalline apatite phase. Bostick et al (2000) demonstrated that ground fish bone (biological apatite) is highly effective for the removal of soluble uranium from synthetic groundwater matrix, and that autunite (calcium uranyl phosphate) crystalline phase is formed at high loadings of uranium.…”

Section: Effect Of Phosphate and Microbial Amendments On U Removalmentioning

confidence: 93%

Interactions among phosphate amendments, microbes and uranium mobility in contaminated sediments

Knox

Brigmon

Kaplan

et al. 2008

Science of The Total Environment

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The use of sequestering agents for the transformation of radionuclides in low concentrations in contaminated soils/sediments offers considerable potential for longterm environmental cleanup. This study evaluated the influence of four phosphate amendments and two microbial amendments on U availability. The synchrotron X-ray fluorescence mapping of the untreated U-contaminated sediment showed that U was closely associated with Mn. All tested phosphate amendments reduced aqueous U concentration more than 90%, likely due to formation of insoluble phosphate precipitates.The addition of A. piechaudii and P. putida alone were found to reduce U concentrations 63% and 31% respectively. Uranium sorption in phosphate treatments was significantly reduced in the presence of microbes. However, increased microbial activity in the treated sediment led to reduction of phosphate effectiveness. The average U concentration in 1 M MgCl 2 extract from U amended sediment was 437 µg/kg, but in the same sediment without microbes (autoclaved sediment), the extractable U concentration was only 103 µg/kg. When the autoclaved amended sediment was treated with autoclaved biological apatite, U concentration in the 1 M MgCl 2 extract was ~0 µg/kg. Together these tests suggest that microbes may enhance U leaching and reduce phosphate amendment remedial effectiveness.

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2006

The Fusarium Laboratory Manual

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In vitro remobilization of Cd immobilized by fungal biomass

Cited by 11 publications

References 21 publications

Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in Festuca ovina Hydroponic Culture

Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in Festuca ovina Hydroponic Culture

Interactions among phosphate amendments, microbes and uranium mobility in contaminated sediments

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