Photons of electromagnetic radiation are oscillating pulses of energy, without electric charge, and therefore they continue along a straight line in their passage between atoms of a material.
The amount of damage in the cell is related to the dose of radiation it receives. This means that using ionizing energy with even low dosage in experiments will still ensure the formation of free radicals in the irradiated cells.
Ionizing radiation produces a wide range of damage to cells due to the production of free radicals of water. The plant average height in every set- ups was measured using a meter stick or ruler by the assigned person in each day. One of the most important targets is the water molecule, which is omnipresent in organisms.
At the cytological level ionizing radiation produces two readily discernible effects: Another type of chromosomal abnormality results from rejoining of two different broken chromosomes in such a manner that the newly formed structure has two centromeres.
Results and discussion Radiation sensitivity test The seed germination test after gamma irradiation 0.
One example of this is the mutagenic radiation which is a physical mutagen that includes non- ionizing radiation such as microwaves, light, radio waves and UV and ionizing radiation such as x-rays, gamma rays, beta and alpha particles and neutrons Campbell and Reece, When a photon collides with a charged atom particle, however, it induces the particle to oscillate and therefore yields up some or all of its energy.
Previous studies reveal that treatment of seeds with high doses of gamma rays disturbs the synthesis of proteinhormone balance, leaf gas exchange, water exchange and enzyme activity.
Furthermore, the concentration of chlorophyll a was higher than chlorophyll b in both irradiated and non-irradiated seedlings.
At the subsequent telophase an acentric fragment is unable to move to either of the newly constituted daughter nuclei. The study aimed to determine the effect of increasing strengths of radiation on plant growth in corn and to verify that the amount of damage in the cell is related to the dose of radiation it receives.
The exposure of a biological system to ionizing radiation activates a number of physical and chemical steps between the initial absorption of energy and the final biological injury. Previous studies [ 34 ] have revealed that seed exposure to high doses of gamma rays disturbs the protein synthesis, hormone balance, leaf gas exchange, and enzyme activity.
As illustrated in Fig. This explains the likelihood of mutation upon irradiating a cell or an organism with ionizing energy. Free radicals possess unpaired electrons that are chemically unstable and thus will interact with DNA, proteins, lipids in cell membranes, and other biomolecules.The specific objectives of the study were: 1.
the effect of mutation to the growth of Zea mays (corn) plant. it was inferred that plants stop or decrease in growing with increasing dosage of radiation.
D.9 The effect of gamma irradiation to induce mutation on the growth of corn (Z. Genetic mutation. Results showed that the corn treated with 10 krad of gamma radiation had significant increase in height than the control.
Full-Text Paper (PDF): UV Irradiation Effects on Seed Germination and Growth, Protein Content, Peroxidase and Protease Activity in Red Bean.
The effect of gamma radiation on the growth of corn plantlings was determined and it is expected that if the dosage of gamma radiation which the plants are exposed is increased, then there would be greater inhibition in the growth of the plant. The study aimed to determine the effect of increasing strengths of radiation on plant growth in corn and to verify that the amount of damage in the cell is related to the dose of radiation it receives.
THE EFFECTS OF ELECTRON BEAM AND GAMMA RAY IRRADIATION LEVELS IN SPRAY-DRIED ANIMAL PLASMA ON NURSERY PIG PERFORMANCE1 trasts were used to determine the effects of increasing irradiation dosage level.
Contrasts of irradiation dose or source on growth per-formance.
From d 14 to 28, pigs fed diets .Download