Microorganisms are present in almost all habitats around the world. Humans provide many suitable habitats for microorganisms: our skin, mouth, stomach, etc. When we think of microorganisms we imagine all the possible diseases that they can cause. However, little is known about the relationship between the host and the guest.
In a plant, relationships with microorganisms can be beneficial. For example, in the root of certain legumes bacteria helps fix nitrogen. In the leaf, bacteria, fungi and yeast help to reduce water loss. Thus, microorganisms in a plant can influence its growth, nutrition and health.
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