Teaching document Plant diseases : for Master 2 Applied Microbiology students
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Date
2024
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Faculty of Sciences
Abstract
Plants and microorganisms have shared the same environment for thousands or even millions of years, which has allowed them to develop communication mechanisms through the exchange of substances, which have been able to establish relationships between the two groups. Various microorganisms are therefore associated with different plant species whether they are cultivated or living in wild areas. Below, we give a perception on the diversity and activity of microbial populations associated with plants that will be gradually developed in this document.
Three types of relationships were defined:
- Negative relationships: in this case microorganisms infect the plant and are responsible
for the appearance of diseases that can be fatal,
- Positive relationships: in this case plants and microorganisms enter into a symbiotic relationship,
- Neutral relationships: in this case microorganisms living in plant tissues benefit from substances produced by host cells but do not cause any disease or exchange metabolite
with the plant.