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Monday, July 13, 2020 | History

2 edition of Accumulation of radioisotopes in corn leaves found in the catalog.

Accumulation of radioisotopes in corn leaves

Jasper Dean Sayre

Accumulation of radioisotopes in corn leaves

by Jasper Dean Sayre

  • 140 Want to read
  • 37 Currently reading

Published by Ohio Agricultural Experiment Station in Wooster, Ohio .
Written in English

    Subjects:
  • Corn -- Ohio -- Composition,
  • Radioactive tracers in agriculture

  • Edition Notes

    Cover title

    StatementJ.D. Sayre
    SeriesResearch bulletin / Ohio Agricultural Experiment Station -- 723, Research bulletin (Ohio Agricultural Experiment Station) -- 723
    The Physical Object
    Pagination30 p. :
    Number of Pages30
    ID Numbers
    Open LibraryOL15226093M

      To investigate the accumulation patterns of Cd and/or Pb in various body parts, organs and tissues of the Asian gypsy moth (Lymantria dispar) larvae u.   Radioactive isotopes 1. RADIOactive ISOTOPES Dr. DEEPA ARUN 2. DEFINITIONS •Isotopes are atoms with the same atomic number but different mass numbers. 3. DEFINITIONS • Radioactivity is the spontaneous degradation of nucleus & transmission of one element to another with consequent emission of rays (or) particles. 4.

      Not until four weeks after silking (R4 stage – kernel dough stage) did the corn show evidence of responding to the N applied at V15 in terms of increased aboveground biomass accumulation when compared to the starter-only control. Total number of ovules (pollinated or not) were counted at growth stage R2 (kernel blister stage). Northern Corn Leaf Blight Physoderma Brown Spot Pythium Stalk Rot Root Rots Seed Decay and Seedling Blight Southern Rust Stewart's Disease. Category: Plant Diseases. Crop(s): Corn. Tags: Corn diseases ISU Extension and Outreach Beardshear Hall Ames, IA () Iowa State University.

    leaves of bean, corn, and sugar beet plants, the results revealed no radioactivity in the first 8-hr period for the sugar beet, in the first hr for the bean, and in the first hr for the corn leaves. Even after such period, the radioactivity found was insignificant for the amount of amitroleC14 used (Tables 1, 2, 3). This observation. Color mutation is a common, easily identifiable phenomenon in higher plants. Color mutations usually affect the photosynthetic efficiency of plants, resulting in poor growth and economic losses. Therefore, leaf color mutants have been unwittingly eliminated in recent years. Recently, however, with the development of society, the application of leaf color mutants has become .


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Accumulation of radioisotopes in corn leaves by Jasper Dean Sayre Download PDF EPUB FB2

Leaves with visible collars. Although six or seven leaves may be visible on the corn plant when the collar of the fourth leaf is visible, the plant has only developed to stage V4. From stages V1 to V10, each new leaf will fully emerge for every 85 growing File Size: 2MB.

This method determines leaf stage in corn by counting the number of leaves on a plant with visible leaf collars, beginning with the lowermost, short, rounded-tip true leaf and ending with the uppermost leaf with a visible leaf collar (Abendroth et al., ).

The leaf collar is the light-colored collar-like “band” located at the base of an. Corn plant increase in weight slowly early in the growing season.

But as more leaves are exposed to sunlight, the rate of dry matter accumulation gradually increases. The leaves of the plant are produced first, followed by the leaf sheaths, stalk, husks, ear shank, cob and finally the grain.

Accumulation of radioisotopes in corn leaves  Sayre, Jasper Dean () Acre yields of beef from corn and meadow crops  Klosterman, Earle Wayne; Kunkle, L. () Actual and optimal adjustments on acre farms in west-central Ohio,  Tompkin, J.

Differences in soil fertility resulted in different rates of dry matter accumulation, but influenced all plant parts similarly. The yield of total dry matter and of grain in plants from different fertility levels was proportional to the weight of leaves even though the chemical composition of the leaves was extremely by: Radiation - Radiation - Accumulation in critical organs: Radionuclides can enter the body by ingestion, inhalation, or injection.

Once taken into the body, their radiation effects depend on their anatomic distribution, Accumulation of radioisotopes in corn leaves book of retention in the body, and rate of radioactive decay, as well as on the energies of their emitted radiations.

An internally deposited radioactive element may. The only InsP 5 observed in any of the leaves analyzed based on retention time was Ins(1,2,4,5,6)P 5 and/or its enantiomer Ins(2,3,4,5,6)P (Gossypium hirsutum) leaf extracts contained InsP 5 and InsP 6 peaks (Figure 3 A) that were not removed upon passage through the SPE cartridge (Figure 3 B).In the short isocratic high-performance ion.

corn farmers, in addition to identifying areas in need of more research. Through the growing season, 27 corn fields had been enrolled in the of several parts: the plumule (leaves) at one end, the radicle (roots) at the other end, and the sculletum which absorbs nutrients stored in the endosperm.

When a seed is placed in moist soil, it. Two Leaf Stage (Two leaves fully open, collar visible)— Leaves have emerged, but the growing point is still below the soil surface. Early Whorl (4–6 leaves fully emerged)—Plants are in the 5 leaf stage and larger.

Mid Whorl (8–10 leaves fully emerged)—This is a period of rapid leaf formation and the beginning of rapid stalk elongation. period of dry matter accumulation during vegetative growth (Figure 1) for all observed nutrients (Figures 2 to 7).

Be-tween V10 and V14, greater than one-third of total B uptake occurred, compared to the other nutrients which ranged from 20 to 30%. During the V10 to V14 growth stages, corn required the availability of lb N/day, lb P 2 O 5. Effects of leaf removal on N remobilization in vegetative organs and its contribution to grain N.

In our experiments, excising the uppermost two leaves increased N remobilization from stem, leading to a higher accumulation of N in grain, while it was decreased markedly in excessive leaf removal treatments (S 4 and S 6).On average, the grain N of S 2 was %. the corn was shallowly planted.

V4 – Fourth-Leaf Nodal roots are dominant, occupying more soil volume than seminal roots. Leaves still developing on apical meristem (primary growth of the plant).

V6 – Sixth-Leaf Six leaves with collar visible. The first leaf with the rounded tip is senescent; consider this point when counting leaves. Corn was first domesticated by native peoples in Mexico ab years ago. Native Americans taught European colonists to grow the indigenous grains, and, since its introduction into Europe by Christopher Columbus and other explorers, corn has spread to all areas of the world suitable to its cultivation.

It is grown from 58° N latitude in Canada and Russia to 40° S. Allocation of photosynthate among leaves, stems, and roots is critical in seedling establishment. Corn (Zea mays L.) seedlings were grown in different spacing patterns in a.

Efficient use of nitrogen (N) fertilizer is essential to increase the economic return of corn (Zea mays L.) production and to minimize potentially negative effects on the en fertilizer applications that exceed crop requirements for economically optimum corn yield can result in an accumulation of soil NO 3-N, which is susceptible to leaching, run-off and/or.

Additions of methionine sulfoximine (MSX), an inhibitor of glutamine synthetase (GS), result in an increase in NH3 in seedling leaves of C3 (wheat [ Triticum aestivum cv. Kolibri ] and barley [ Hordeum vulgare var Perth]) and C4 (corn [ Zea mays W6A × WE] and sorghum [ Sorghum Vulgare var MK]) plants.

NH3 accumulation is higher in C3 (about micromoles per. Number of leaves at sampling day and number of leaves at start of experiment ratio of S. bicolor af 21 and 28 d of growth in solution withor (μM) cadmium concentration or with, or (μM) zinc concentration.

(n = 4). The resumption of normal plant growth from a heavy rainfall will reduce nitrate accumulation in corn plants, and harvest should be delayed for at.

Results are reported from studies of the genetic control of the accumulation of certain elements in corn leaves. Emphasis was placed on the accumulation of Ca and Sr.

The correlation of the level of Ca and Sr accumulation in leaf tissue with the accumulation by the whole plant appeared to be high enough that leaf tissue analysis is an adequate. The absorption and accumulation of Cd2+, Fe3+, Zn2+, Mn2+, Cu2+ and Mg2+ in the roots and leaves of 20 rice cultivars (Oryza sativa L.) with different.

The first leaf on a corn plant has a rounded end, known as the flag leaf. This is the only leaf on the plant that exhibits this trait. When determining the number of leaves on a corn plant, the flag leaf should be the first leaf counted.

This picture illustrates a corn plant with the seed exposed at V1. Located below the seed is the radicle.than average corn yields in •Final grain yield was bu/ac with a harvest index of 54%. •The highest rate of DM accumulation was during early grain fill (R2-R5) at lb/ac/day or bu/ac/day. •DM accumulation was greatest for leaves between V8-VT.

•The ear was separated into grain and cob plus husk at R5. Dry Matter.In contrast, the influence of lumbricidae on the uptake of isotopes by bean leaves is much stronger than the elateridae, while lumbricidae exhibits stronger depressive effects on Ca/sup 45/ and Sr/sup 90/ uptake by bean roots.

The lumbricidae exert a stronger influence on plants' assimilation of radioactive isotopes. (R.V.J.).