<strong>Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in <em>Festuca ovina</em> Hydroponic Culture</strong>
Journal Title: Polish Journal of Microbiology - Year 2016, Vol 65, Issue 2
Abstract
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 [i]Festuca ovina[/i] (Sheep’s fescue) hydroponically cultivated in nutrient solutions supplemented with 1 μg Cd ml[sup]–1[/sup] and those cultivated at 10 μg Cd ml[sup]–1[/sup]. After three weeks of [i]F. ovina[/i] 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[sup]–1[/sup]. 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[sup]–1[/sup], 9% of the immobilized cadmium was loosely bound to the root surface, 20% was exchangeable adsorbed, and 28% was bound by chelation; at 10 μg Cd ml[sup]–1[/sup], the respective values were 12%, 25%, and 20%. About 43% of the immobilized cadmium remained in roots after sequential extraction, and bioaccumulation factors in shoots had the same values independently of Cd concentration. At both Cd concentrations, the cadmium translocation index for [i]F. ovina[/i] was low (&amp;lt; 1), which is why this grass can be recommended for phytostabilization of the metal under study.
Authors and Affiliations
Małgorzata Majewska, Anna Słomka
Keywords
Related Articles
- EP ID EP81080
- DOI -
- Views 92
- Downloads 0
Bacterial Diversity In Çamaltı Saltern, Turkey
A combination of culture-dependent and culture-independent approaches were employed to identify bacterial diversity of Çamaltı solar saltern in Turkey. The bacterial populations of Çamaltı Saltern were analyzed by molecu...
Influence of Pseudomonas and Bacillus Strains Isolated from Lolium perenne Rhizospheric Soil in Vojvodina (Serbia) on the Planth Growth and Soil Microbial Communities
The aim of this study was the isolation of Pseudomonas sp. and Bacillus sp. strains from rhizospheric soil and monitoring the impact of two isolates denoted as P12 (Pseudomonas sp.) and B1 (Bacillus sp.) on the parameter...
Intracellular Siderophore Detection in an Egyptian, Cobalt-Treated F. solani Isolate Using SEM-EDX with Reference to its Tolerance
An Egyptian, plant pathogenic Fusarium solani isolate was grown on cobalt concentrations of 0, 50, 200, 500, 800, and 1000 ppm. The isolate survived concentrations up to 800 ppm, however failed to grow at 1000 ppm. Morph...
Biologically-Induced Precipitation of Minerals in a Medium with Zinc Under Sulfate-Reducing Conditions
[b][/b]Sulfate-reducing microbial communities were enriched from soils collected in areas with crude-oil exploitation. Cultures were grown in modified Postgate C medium and minimal medium, with ethanol or lactate as...
Evaluation of the Levels and Quality of Microbial Contamination in Medical Emergency Departments in Comparison to Other Workplaces
Work in Hospital Emergency Departments (HEDs) exposes both the emergency ward staff and patients to infectious and in other way harmful biological agents. The results of this study shows the presence of pathogenic bacter...