3/28 free write results of Soil microbe lab report

After week one while we let the potential antibiotic-producing bacteria grow in augers 2 and 3, the characteristics of the strains of bacteria became more relevant. JL had a deeper purple color and grew in a widespread filamentous colony. SA grew in a circular colony, typically small white dots scattered across the auger.
After creating plates 4 and 5 and allowing change to happen the results of the zone of inhibitions occurred. These results are shown in the boxes below.
Our results from the experimental plate concluded that neither species SA or JL created a zone of inhibition with the target bacteria, bacillus subtilis. It was also noted that the plugs we placed into plate 4 did not grow, neither did the target bacteria. There was no change in the colonies on the plug, however it is noted that that target bacteria grew but neither interfered with each other.
It is shown that the antibiotic Tetracycline created the largest zone of inhibition to the target bacteria although Gentamicin did create one too, Tetracycline did a better job of inhibiting the target bacteria. Penicillin unfortunately did not inhibit the target bacteria at all.
Plate 6 helps interpret plate 5 because plate 6 showed us an example of a zone of inhibition and how antibodies from a bacteria inhibit growth of other bacteria. We then could compare our results from plate 5 to plate 6 to see how whether or not JL and SA did what the Penicillin, Tetracycline, or Gentamicin did in inhibiting bacteria growth or not.


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