scholarly journals Emerging investigator series: entrapment of uranium–phosphorus nanocrystals inside root cells of Tamarix plants from a mine waste site

2021 ◽  
Author(s):  
Lucia Rodriguez-Freire ◽  
Cherie L. DeVore ◽  
Eliane El Hayek ◽  
Debora Berti ◽  
Abdul-Mehdi S. Ali ◽  
...  
Keyword(s):  
Mine Waste ◽  
Waste Site ◽  
Root Cells ◽  
Uranium Uptake

Uranium uptake and accumulation in the roots of Tamarix plants, leading to extracellular U precipitation, and the intracellular entrapment of U–P nanocrystals.

The effects of soil factors on the distribution of Agrostis gigantea on a mine waste site

1977 ◽  
Vol 55 (8) ◽  
pp. 1038-1042 ◽  
Author(s):  
Gary D. Hogan ◽  
Gerald M. Courtin ◽  
Wilfried E. Rauser
Keyword(s):  
Heavy Metals ◽  
Avena Sativa ◽  
Mine Waste ◽  
Selective Advantage ◽  
Copper Tolerance ◽  
Waste Site ◽  
Soil Factors ◽  
Extractable Metals ◽  
Water Extractable

A number of soils were examined from areas of a mine waste contaminated with heavy metals. Soils from areas vegetated with Agrostis gigantea Roth, which did not possess copper tolerance were compared with adjacent barren areas. Soils from sites which supported non-tolerant grasses had higher pHs and were lower in water-extractable metals than soils from non-vegetated areas. The soils did not differ with respect to any other factor examined. The non-vegetated soils were shown to be more toxic to the growth of Avena sativa than vegetated soils. The establishment and survival of grasses not having the selective advantage of copper tolerance were found to be restricted to the less toxic regions of the study site.

Spread and partitioning of arsenic in soils from a mine waste site in Madrid province (Spain)

2014 ◽  
Vol 500-501 ◽  
pp. 23-33 ◽  
Author(s):  
M.A. Gomez-Gonzalez ◽  
S. Serrano ◽  
F. Laborda ◽  
F. Garrido
Keyword(s):  
Mine Waste ◽  
Waste Site

Copper tolerance in clones of Agrostis gigantea from a mine waste site

1977 ◽  
Vol 55 (8) ◽  
pp. 1043-1050 ◽  
Author(s):  
Gary D. Hogan ◽  
Gerard M. Courtin ◽  
Wilfried E. Rauser
Keyword(s):  
Mine Waste ◽  
Copper Tolerance ◽  
Waste Site ◽  
Vegetative Cover ◽  
High Copper ◽  
Adjoining Area ◽  
High Copper Content ◽  
High Level ◽  
Copper Tolerant ◽  
Tolerant Clones

A mine waste site from Sudbury, Ontario, contaminated with heavy metals is described. The dominant vegetative cover was formed by two grasses: Agrostis gigantea Roth, and Agrostis scabra Willd. Testing of 10 clones of A. gigantea from the roast bed and an adjoining area for copper tolerance showed that two clones collected from the roast bed were tolerant to increased copper levels. Copper tolerance was found in clones growing on soils with high copper contents and low pHs. The combination of high copper content and low pH brought about a high level of extractable copper within the soil. Soils with equally high copper levels but higher pHs and therefore low extractable-copper levels did not support copper-tolerant clones.

Effect of Niacin on Mitochondria of Allium Cepa Root Cells

1967 ◽  
Vol 25 ◽  
pp. 78-79
Author(s):  
M. Arif Hayat
Keyword(s):  
Nicotinamide Adenine Dinucleotide ◽  
Hydrogen Transfer ◽  
Nicotinamide Adenine Dinucleotide Phosphate ◽  
Nicotinamide Adenine ◽  
Root Tips ◽  
Root Cells ◽  
Transfer Processes ◽  
Standard Procedures ◽  
A Cell ◽  
Critical Interest

Although it is recognized that niacin (pyridine-3-carboxylic acid), incorporated as the amide in nicotinamide adenine dinucleotide (NAD) or in nicotinamide adenine dinucleotide phosphate (NADP), is a cofactor in hydrogen transfer in numerous enzyme reactions in all organisms studied, virtually no information is available on the effect of this vitamin on a cell at the submicroscopic level. Since mitochondria act as sites for many hydrogen transfer processes, the possible response of mitochondria to niacin treatment is, therefore, of critical interest.Onion bulbs were placed on vials filled with double distilled water in the dark at 25°C. After two days the bulbs and newly developed root system were transferred to vials containing 0.1% niacin. Root tips were collected at ¼, ½, 1, 2, 4, and 8 hr. intervals after treatment. The tissues were fixed in glutaraldehyde-OsO4 as well as in 2% KMnO4 according to standard procedures. In both cases, the tissues were dehydrated in an acetone series and embedded in Reynolds' lead citrate for 3-10 minutes.

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