scholarly journals The uptake and transpiration of water and the accumulation of lead by plants growing on lead chloride solutions

2014 ◽  
Vol 56 (2) ◽  
pp. 271-280 ◽  
Author(s):  
Marek Burzyński
Keyword(s):  
Water Uptake ◽  
Lead Chloride ◽  
High Accumulation ◽  
Chloride Solutions ◽  
Length Of Treatment ◽  
Bean Plants ◽  
Lower Stem

The placement of approximately two week-old bean, cucumber and wheat plants in PbCl<sub>2</sub> solutions caused significant decreases in transpiration and uptake of water. The amount of transpiration and water uptake depended on the PbCl<sub>2</sub> concentration and length of treatment. Cucumber plants were the most sensitive to lead and accumu-lated the. greatest amounts of it. Beans were the least sensitive, although they accumulated more lead than wheat. The lead taken up by cucumbers and beans accumulated mainly in the roots while the distribution of lead in wheat was rather uniform in the roots and above-ground parts. The removal of roots from bean plants caused high accumulation of lead in the lower stem parts.

Water Uptake and Embryonic Development in Eggs of Chorthippus Brunneus Thunberg (Saltatoria: Acrididae)

1969 ◽  
Vol 50 (2) ◽  
pp. 327-333
Author(s):  
F. MORIARTY
Keyword(s):  
Sodium Chloride ◽  
Embryonic Development ◽  
Water Absorption ◽  
Osmotic Pressure ◽  
Water Uptake ◽  
Water Loss ◽  
Chloride Solutions ◽  
Sodium Chloride Solutions ◽  
Close Relationship ◽  
Further Development

1. The pattern of water absorption by eggs of Chorthippus brunneus varies greatly between individuals. 2. The time at which water is absorbed does not have a close relationship with the stage of embryonic development. 3. Water absorption is not essential for prediapause development. 4. Eggs can only undergo blastokinesis and further development, after diapause is broken, if some water has been absorbed. 5. The rate of water loss or gain varies with the osmotic pressure of sodium chloride solutions. 6. Eggs which have started to absorb water appear to become desiccated more rapidly than eggs which have not.

The solubility of aqueous lead chloride solutions

1987 ◽  
Vol 19 (2) ◽  
pp. 199-208 ◽  
Author(s):  
R.G. Holdich ◽  
G.J. Lawson
Keyword(s):  
Lead Chloride ◽  
Chloride Solutions

THE EFFECT OF SODIUM DIMETHYLDITHIOCARBAMATE ON WATER UPTAKE, TRANSPIRATION, AND STOMATAL OPENING

1964 ◽  
Vol 42 (10) ◽  
pp. 1405-1410 ◽  
Author(s):  
G. D. Thorn ◽  
W. H. Minshall
Keyword(s):  
Amino Acids ◽  
Root System ◽  
Water Uptake ◽  
Water Movement ◽  
Stomatal Opening ◽  
Large Reduction ◽  
Root Pressure ◽  
Bean Plants ◽  
Detached Leaves ◽  
Total Amino Acids

Sodium dimethyldithiocarbamate, applied to the roots of tomato and bean plants, markedly decreases the rate of transpiration and prevents stomatal opening. The chemical also causes a large reduction in water movement associated with metabolic root pressure. The concentration of total amino acids moving out of the root system is reduced by as much as 50% of normal. Transpiration and stomatal opening of detached leaves from untreated plants are not affected appreciably by solutions of sodium dimethyldithiocarbamate.

Ion association in lead chloride solutions

1955 ◽  
Vol 51 ◽  
pp. 802 ◽  
Author(s):  
A. I. Biggs ◽  
M. H. Panckhurst ◽  
H. N. Parton
Keyword(s):  
Ion Association ◽  
Lead Chloride ◽  
Chloride Solutions

The comparative effects of exchangeable calcium, magnesium, and sodium on some physical properties of red-brown earth subsoils. II. The spontaneous dispersion of aggregates in water

Soil Research ◽  
1973 ◽  
Vol 11 (2) ◽  
pp. 151 ◽  
Author(s):  
WW Emerson ◽  
AC Bakker
Keyword(s):  
Physical Properties ◽  
Water Uptake ◽  
Salt Concentration ◽  
The Other ◽  
Soluble Salt ◽  
Chloride Solutions ◽  
Actual Concentration ◽  
Exchangeable Calcium ◽  
Calcium Magnesium ◽  
Natural Aggregates

Aggregates from the subsoils of four red-brown earths were brought into equilibrium with chloride solutions of known SAR, 1 mM in calcium or magnesium. The solutions were replaced by water and the amount of clay which subsequently dispersed from the aggregates measured. For the three soils from the same area, the ESP required to induce dispersion was about 3 for magnesium-sodium aggregates compared with 5 for calcium-sodium aggregates. For the other soil the respective ESP values had to be increased by a factor of 2. The increased resistance to dispersion of the latter was maintained even after sodium saturation. The results are used to show that differences in the dispersion of the natural aggregates in water are due primarily to the composition of the cations on the exchange sites, including aluminium. Shepparton aggregates of known ESP were wetted with water at 12 cm suction. Compared with calcium or magnesium aggregates, there was a marked further water uptake by magnesium-sodium aggregates for ESP > 3 and for calcium-sodium aggregates for ESP >9. The subsequent dispersion in water of such aggregates was much less than that of aggregates treated in the standard way. It is suggested that the spontaneous dispersion of clay from a wet aggregate of low ESP immersed in water depends on the gradient of the soluble salt concentration at the boundary of the intact portion of the aggregate, as well as the actual concentration.

Equilibria in aqueous lead chloride solutions

1937 ◽  
Vol 33 ◽  
pp. 623 ◽  
Author(s):  
L. Wilkinson ◽  
N. O. Bathurst ◽  
H. N. Parton
Keyword(s):  
Lead Chloride ◽  
Chloride Solutions

Growth Retardant Response of Bean (Phaseolus vulgaris) and Woody Plants to Injections of MBR 18337

Weed Science ◽  
1983 ◽  
Vol 31 (4) ◽  
pp. 431-435
Author(s):  
John P. Sterrett ◽  
Richard H. Hodgson ◽  
Robert H. Snyder
Keyword(s):  
Phaseolus Vulgaris ◽  
Acer Rubrum ◽  
Growth Retardant ◽  
Red Maple ◽  
White Ash ◽  
Bean Plants ◽  
Chamber Studies ◽  
Growth Chamber Studies ◽  
Sprout Growth ◽  
Lower Stem

The growth retardant activity of MBR 18337 {N-[4-(ethylthio)-2-(trifluoromethyl)phenyl]-methanesulfonamide} was determined by injection into bean plants (Phaseolus vulgarisL. ‘Black Valentine’), California privet seedlings (Ligustrum ovalifoliumHassk.), and saplings of white ash (Fraxinus americanaL.) and red maple (Acer rubrumL.). Height and leaf expansion of bean were inhibited by 8 μg of MBR 18337 per plant in growth chamber studies. Sprout growth of California privet grown in the greenhouse was inhibited for 92 days by 80 μg of MBR 18337 per tree, and the growth in the field of ash and maple saplings was retarded by 3.2 mg of MBR 18337 per tree for an entire growing season with little injury. Radioassays for14C-MBR 18337 indicated rapid translocation of14C-activity in privet from the lower stem to the region of the apical shoot. More than 80% of the MBR 18337 in the xylem and phloem was oxidized within 14 days.

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