Table of Contents
- 1 Why do we irradiate seeds?
- 2 What happens when a seed is germinated?
- 3 What are the disadvantages to irradiating food?
- 4 How is irradiation done?
- 5 What are the 3 stages of germination?
- 6 Will microwaved seeds grow?
- 7 Why cant you sprout half of a seed?
- 8 What temp kills seeds?
- 9 Why are the seeds in the science fair project irradiated?
- 10 How does irradiation of food affect microorganisms?
Why do we irradiate seeds?
Irradiation can serve many purposes. Prevention of Foodborne Illness – to effectively eliminate organisms that cause foodborne illness, such as Salmonella and Escherichia coli (E. coli). Preservation – to destroy or inactivate organisms that cause spoilage and decomposition and extend the shelf life of foods.
What happens when a seed is germinated?
Seed germination starts with imbibition, when the seed takes in water from the soil. This triggers root growth to allow the seed to get more water. Then, the shoots develop and grow towards the sun above ground. After the shoots reach the ground, leaves form, allowing the plant to harvest energy from the sun.
Can damaged seeds germinate?
Any form of damage to the seed can cause a significant reduction in seed capacity of producing a healthy seedling. Germination of seeds decreased significantly with damage level (Koptur, 1998) .
What are the disadvantages to irradiating food?
List of the Disadvantages of Food Irradiation
- We cannot irradiate some food products.
- It can change the nutritional profile of some foods.
- Minimal labeling requirements exist for food irradiation.
- There can be resistant strains of bacteria to the irradiation process.
- The cost of food irradiation is an issue to consider.
How is irradiation done?
During irradiation, energy passes through food much like a ray of light passes through a window. This energy destroys most of the bacteria that can cause disease, yet allows food to retain its high quality. Irradiation pasteurizes food by using energy, just as milk is pasteurized using heat.
What to do after a seed germinates?
As your seedlings grow, use a fan on them for a few hours a day to stress them a little. Also, allow them to dry out a bit by missing a watering and a fertilizing once a week and put them in a cool spot at night. Your plants will be a lot stronger and more able to survive better on their own outside.
What are the 3 stages of germination?
In general, germination process can be distinguished into three phases: phase I, rapid water imbibition by seed; phase II, reactivation of metabolism; and phase III, radicle protrusion .
Will microwaved seeds grow?
Seeds only microwaved 15 seconds might actually show more sprouting early on. Seeds microwaved for longer periods won’t sprout at all. If all your seeds sprout, you need to redo your experiment with higher microwave times, if none of them sprout, you need to redo the experiment with lower microwave times.
What do microwaves do to plants?
Microwaves and Plant Soil When soil is exposed to a prolonged dose of microwaves, plant growth within that soil is impeded, and germination rates go down, due to a diminished amount of nutrients in the irradiated soil. This results in plants that mature too rapidly and die before they reach full size.
Why cant you sprout half of a seed?
Half Seed Turned into Organic Matter They won’t sprout, but they will add nutrients to the soil as they decay.
What temp kills seeds?
Seeds begin to die at temperatures above 108 degrees Fahrenheit, but require longer periods of exposure at lower temperatures. At temperatures below 140 degrees Fahrenheit some species are not affected by heat treatments.
How does radiation affect the quality of seeds?
Seeds are clearly more hearty than other animals, and likely even full grown plants. While research has shown clearly that radiation has a large impact on both the quantity and quality of seedlings, it has also been shown that radiation impacts various seed varieties differently.
Why are the seeds in the science fair project irradiated?
It is important to understand that the seeds in this science fair project have been “irradiated,” which means they were treated with gamma rays. The seeds are not radioactive. Because they are so energetic, gamma rays can penetrate deeply into tissue.
How does irradiation of food affect microorganisms?
When you irradiate food, you produce an effect on microorganisms due to their effects on DNA and cell membranes. Photons, electrons, or x-rays strike the cell membranes and the DNA, damaging both. In plant cells, DNA is not required for reproduction, so damage to DNA is irrelevant.
Is it safe to irradiate radishes with gamma rays?
The X-ray you get at the dentist or when you have a chest X-ray is safe because the dose is so low. In this plant biology science fair project, you will investigate how radish seeds are affected by gamma irradiation. Gamma rays are even more powerful than X-rays.