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What are the best conditions for the germination of seeds.

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Introduction

What are the best conditions for the germination of seeds Skill C4: Planning, carrying out and evaluation investigations Alasdair Ong 10S/ Group E Aim: I aim to investigate the ideal conditions needed for seeds to germinate. I need to vary certain conditions, while keeping all the other conditions the same, in order to maintain a fair test. Germination is the sprouting of either the radical (root), or the plumule (shoot). I intend to measure the length of either the radical or the plumule, and see which test specimen had sprouted the most over the same period of time in order to decide which temperature was the optimum for germination. Germination can also be affected by the pH of soil, and the amount of oxygen, therefore I need to keep these things the same, so I know that the results were not affected by anything apart from the temperature. Predictions: I will change the temperature and investigate which temperature is the best for the germination of the seed. Since temperature affects the rate of enzyme reaction, due to the kinetic theory, and how the molecules move and collide more while at higher temperatures, I predict the optimum ...read more.

Middle

I need to have my seeds all fresh and within 0.6g of the heaviest seed. For example, if the heaviest seed weighs 1g, the lightest seed I can have should be 0.4g. Equipment: I will require: Fresh Seeds*20 Thermometers*1 Measuring Cylinders*1 Test Tubes*12 Water Bath*3 Ruler*1 Cotton wool*30 (0.85g) Refrigerator*1 Scales*1 I need to use the thermometer to test if the temperatures are accurate and not too hot or cold. This keeps the experiment fair and accurate. I need the measuring cylinder to accurately measure the amount of water which I put into the test tube. The water baths will be used to maintain the temperatures in the test tubes for the seeds to germinate. The ruler will be to measure the growth of the sprouts and to determine which of the seed had germinated best. I need the scales to weight the seeds and the cotton wool. The cotton wool has to be the same, because it affects the amount of light available to the seed. Test Conditions: Room Temp(23�c), 30�c, 40�c, 50�c, 60�c Method: 1) ...read more.

Conclusion

Sprout and shoot starts to grow. Seed started to germinated. Radical longer than 23�c specimen Seed started to germinate. Radical and Plumule longer than all other specimens Tesla Broken. No Germination No Germination. 2nd Check Germinated, seed tesla opened, exposing cotyledon. Sprout and shoot starts to grow. Seed started to germinated. Radical grew more. Still longer than 23�c specimen Seed started to germinate. Radical and Plumule longer than all other specimens Tesla Broken. No Germination No Germination. Conclusion The seedlings in the 40�c germinated the best, with the longest sprout out of all the tests. This is quite close to my prediction. I predicted the best temperature would have been 30�c. The best temperature for germination was 40�c. I think the germination was not as good in the room temperature (23�c) test as the 30�c or the 40�c because the rate of enzyme reaction would be lower. In the 40�c test, the enzymes reaction would have been higher. This is because the molecules would collide and move around more often at higher temperatures because they would have more kinetic energy. Over 40�c and the enzyme would become denatured and could no longer react with other molecules. ...read more.

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