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How Is the Germination of Daikon Radish Seeds Affected by the Salt Added to Water that the Seeds Have Been Exposed to?
Nr. | Название главы | Стр. |
Background | 2 | |
Variables | 4 | |
Controlling variables | 5 | |
Apparatus and materials | 6 | |
Method/Procedure | 7 | |
Observations | 8 | |
Limitations | 9 | |
Qualitative data | 10 | |
Bibliography | 16 |
Conclusion:
The aim of this experiment was to investigate whether or not salinity of the water solution will affect the speed of germination and the quantity of seeds germinated during a period of 7 days. The experiment was designed so that the seeds were exposed to appropriate amount of water and set in an environment that was the most appropriate to the Daikon Radish seeds (the seeds used in the experiment). The only factor that was purposely changed during the experiment was the salinity of the water the seeds were exposed to. The hypothesis of the experiment was “Seeds exposed to 1.0 g of salt will take longer to germinate. Seeds exposed to 0.5 g of salt will germinate faster, however seeds exposed to no additional salt will germinate at the greatest speed”.
As I have mentioned in the report, in the observation section, there were limitations to the accuracy of the data collected. During the experiment I have followed certain safety restriction, as not to cut myself when preparing the cups for the experiment. I have also been careful not to adjust the data in a way that would accept the hypothesis in a false way.
The data collected shows that seeds that were exposed to higher levels of salinity showed less productivity and the speed of germination was reduced to minimum. Seeds that were exposed to little salt (0.5 g) showed higher productivity that the ones exposed to 1.0 g of salt, however the data was still lower than the data on the seeds that were held in regular tap water. This information collected showed that seeds exposed to 1.0 g of salt would take longer to germinate, seeds exposed to 0.5 g of salt will germinate faster, however seeds exposed to no additional salt will germinate at the greatest speed, therefore supporting my hypothesis completely.
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IB Biology HL IA - “How is the germination of Daikon Radish seeds affected by the salt added (0.0 g, 0.5 g, 1.0 g) to 50 ml of water that the seeds have been exposed to?” Seed germination takes place when a dry seed is exposed to water and a process called imbibition (taking up water) is taking place. As seeds imbibe water, the enzymes and food supplies are hydrated and their physical appearance change. Due to hydration of the enzymes, the seed is capable of speeding up its metabolic activities, therefore producing energy for the growth of the cells. An Important factor when germinating seeds is to know its dormancy. For non-dormant seeds, the germination will take place once the seed is exposed to water, appropriate amounts of light, and temperature, however dormant seeds are incapable of germinating even under ideal circumstances. Dormancy can be broken in several ways, for example the exposure to dry environment for several weeks.