Observations After conducting an experiment to find which plant, Tagetes erecta or Pelargonium graveolens inhibit bacterial growth. Results have shown that one plant, Pelargonium graveolens, prevented the growth of the bacteria, Staphylococcus, more efficiently and effectively than the Tagetes erecta. These results are evident as seen in the statistics provided above. The area around the Pelargonium graveolens sample just after day one was at 8 millimetres; day two increased to 9 millimetres and remained the same throughout the four day experiment. As shown in the graph, the area around the plant sample grows in a circular size showing the inability of the bacteria to invade the plant cells. The graph then plateaus and the area only increased to one more millimetre. The area around the Tagetes erecta remained at 0 millimetres throughout the experiment. In the images A and B, after the first day, a brown circle appeared around the plant sample. This brown colour was an act of the bacteria fighting against the plant cells. The Staphylococcus started invading the cells of the Tagetes erecta. In images C and D, a clear circular ring was produced after the first day of incubation. This was a mean of the plant fighting the bacterium, almost like the plant produced a barrier against the bacterium. The agar plates remained the same until the experiment was completed after 4 days. Therefore, one can concluded that the …show more content…
Tagetes erecta treats only a few bacterial diseases in comparison to the Pelargonium graveolens. After conducting the experiment, it is clear that the initial hypothesis question was incorrect as the Pelargonium graveolens prohibits the growth of bacteria more efficiently than the Tagetes