MILDEW OF THE BREAD

Objective of the experiment

We want to cultivate the mildew of the bread

Instructions

Put a wet piece of bread (with approximately 20 water drops) in a closed bag and hold the bag for a week in a warm dark place.

Observations

1th day: nothing happens
2nd day: nothing happens
3rd day: on the soft part there is a small grey-green-whitish spot (mildew)
4th day: the spot is larger; there are some green dots also on the crust
5th day: the mildew has expanded on the soft part and on the crust
6th day: all the soft part has assumed a grey-green colour
7th day: the mildew spots have filled up all the surface of the bread

 

 

Conclusions

The spores of the mildew are everywhere in the air and therefore they are also on the bread. With an adapted atmosphere (warm, dark, humid) they proliferate.

 

School site Aristotle Redi Spallanzani Metamorphosis Microorganisms "The tiny animals"