The effect of some micronutrients and heavy metals on phosphate absorption by maize root cortex segments

1984 ◽  
Vol 26 (3) ◽  
pp. 161-165 ◽  
Author(s):  
Ivana Macháčková ◽  
Z. Zmrhal
Keyword(s):  
Heavy Metals ◽  
Maize Root ◽  
Root Cortex ◽  
Phosphate Absorption

Characterization of phosphate absorption in maize root cortex segments

1983 ◽  
Vol 25 (5) ◽  
pp. 366-372 ◽  
Author(s):  
Ivana Macháčková ◽  
J. Král ◽  
Z. Zmrhal
Keyword(s):  
Maize Root ◽  
Root Cortex ◽  
Phosphate Absorption

Transport and dynamics of molecules dissolved in maize root cortex membranes

1995 ◽  
Vol 143 (1) ◽  
Author(s):  
J. Svetek ◽  
V. Furtula ◽  
M. Nemec ◽  
E.A. Nothnagel ◽  
M. Schara
Keyword(s):  
Maize Root ◽  
Root Cortex

scholarly journals Chloride Fluxes in Cells of the Isolated Root Cortex of Zea Mays

1973 ◽  
Vol 26 (4) ◽  
pp. 757 ◽  
Author(s):  
WJ Cram
Keyword(s):  
Zea Mays ◽  
Maize Root ◽  
Cortical Tissue ◽  
Cortical Cells ◽  
Root Cortex ◽  
Root Segments ◽  
Isolated Cortex ◽  
In Cells

Isolated maize root cortical tissue is used to eliminate stelar complications in measuring fluxes. Comparison of isolated cortex and whole root segments shows that the cortex is not damaged by separation from the stele, that the initial influx estimate of the plasmalemma influx in cortical cells of whole roots

Effects of Sewage Sludge Application on Contents of Heavy Metals in the Soil and Growth of Maize

2013 ◽  
Vol 838-841 ◽  
pp. 2694-2700
Author(s):  
Liang Dai ◽  
Ya Mei Gao ◽  
Jun Ping Zhang
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Root Length ◽  
Plant Root ◽  
Seedling Emergence ◽  
Land Application ◽  
Maize Root ◽  
Dose Effect ◽  
Good Growth ◽  
Sludge Application

Through pot experiments,the effects of various sludge loadings (0,40,80,120,200,280 t·ha-1) on growth of maize and sewage sludge application on contents of heavy metals in the soil were studied using sewage sludge from An-ning Plant of Wastewater Treatment of Lanzhou City. The results showed land application of sewage sludge increased significantly the contents of PbCuZn in the soil. The contents of PbCuZn in the soil did not exceed the standard of Environmental quality standards for soils for Grade II (GB-1518-1995) in china. Maize obtained good growth activities after land application of sewage sludge,maize height and biomass were increased significantly and were better than the control. Land application of sewage sludge inhibited maize seedling emergence and maize root length,showing the effects of dose-effect relationship with sludge application increasing. Maize root length was restrained significantly by heavy metals in the soil, the effects of heavy metals in the soil on plant root system should be considered with land application of sewage sludge. The optimal land application of sewage sludge is 80-120 t·ha-1.

A role for gibberellic acid in orienting microtubules and regulating cell growth polarity in the maize root cortex

Planta ◽  
1993 ◽  
Vol 191 (2) ◽  
pp. 149-157 ◽  
Author(s):  
F. Baluška ◽  
J. S. Parker ◽  
P. W. Barlow
Keyword(s):  
Cell Growth ◽  
Gibberellic Acid ◽  
Maize Root ◽  
Root Cortex ◽  
Growth Polarity

scholarly journals Short communication: Anatomical changes in the roots, rhizomes and leaves of seagrass (Cymodocea serrulata) in response to lead

2019 ◽  
Vol 20 (9) ◽  
Author(s):  
Dwi Rosalina ◽  
ENDANG YULI HERAWATI ◽  
MUHAMMAD MUSA ◽  
DINI SOFARINI ◽  
YENNY RISJANI
Keyword(s):  
Heavy Metals ◽  
Cell Walls ◽  
Industrial Development ◽  
Short Communication ◽  
Response To Treatment ◽  
Potential Threat ◽  
Root Cortex ◽  
Anatomical Features ◽  
Anatomical Changes ◽  
Cymodocea Serrulata

Abstract. Rosalina D, Herawati EY, Musa M, Sofarini D, Risjani Y. 2019. Short communication: Anatomical changes in the roots, rhizomes, and leaves of seagrass (Cymodocea serrulata) in response to lead. Biodiversitas 20: 2583-2588. Runoff of heavy metals as a result of urban and industrial development is a potential threat for seagrass populations in the coast. The objectives of this study were to study the anatomical changes in the tissues of roots, rhizomes, and leaves of seagrass Cymodocea serrulata in response to treatment with different concentrations of lead (Pb) for different time durations. This experiment used heavy metal Pb from a solution of Pb (NO3)2-with a concentration of 0 ppm, 5 ppm, 10 ppm, and 15 ppm and the treatment period extended up to 4 weeks with 3 replications. Analysis of changes in anatomical features showed that exodermis and endodermis cells in the roots thickened as lead concentration increased. The air spaces in the root cortex and rhizome also widened. Thickening of cell walls occurred in the epidermis and endodermis of rhizome. Likewise, in the leaves, thickening occurred in the upper and lower cuticle and also the upper and lower epidermis. In general, changes in anatomical features of root, rhizome, and leaves were observed in response to increasing lead concentrations. The results showed that C. serrulata developed some level of tolerance to heavy metals, especially lead.

Sampling and analysis of the air-water interface with SEM and EDS of microlayers

1989 ◽  
Vol 47 ◽  
pp. 1004-1005
Author(s):  
Randall W. Smith ◽  
John Dash
Keyword(s):  
Heavy Metals ◽  
Surface Microlayer ◽  
Surface Films ◽  
Water Interface ◽  
Physical Processes ◽  
Infrared Spectroscopic Analysis ◽  
Eds Analysis ◽  
Air Water Interface ◽  
Significant Area ◽  
Bulk Chemical

The structure of the air-water interface forms a boundary layer that involves biological ,chemical geological and physical processes in its formation. Freshwater and sea surface microlayers form at the air-water interface and include a diverse assemblage of organic matter, detritus, microorganisms, plankton and heavy metals. The sampling of microlayers and the examination of components is presently a significant area of study because of the input of anthropogenic materials and their accumulation at the air-water interface. The neustonic organisms present in this environment may be sensitive to the toxic components of these inputs. Hardy reports that over 20 different methods have been developed for sampling of microlayers, primarily for bulk chemical analysis. We report here the examination of microlayer films for the documentation of structure and composition.Baier and Gucinski reported the use of Langmuir-Blogett films obtained on germanium prisms for infrared spectroscopic analysis (IR-ATR) of components. The sampling of microlayers has been done by collecting fi1ms on glass plates and teflon drums, We found that microlayers could be collected on 11 mm glass cover slips by pulling a Langmuir-Blogett film from a surface microlayer. Comparative collections were made on methylcel1ulose filter pads. The films could be air-dried or preserved in Lugol's Iodine Several slicks or surface films were sampled in September, 1987 in Chesapeake Bay, Maryland and in August, 1988 in Sequim Bay, Washington, For glass coverslips the films were air-dried, mounted on SEM pegs, ringed with colloidal silver, and sputter coated with Au-Pd, The Langmuir-Blogett film technique maintained the structure of the microlayer intact for examination, SEM observation and EDS analysis were then used to determine organisms and relative concentrations of heavy metals, using a Link AN 10000 EDS system with an ISI SS40 SEM unit. Typical heavy microlayer films are shown in Figure 3.

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