Introductory Microbiology (1+1)

Interrelationship between microorganism: Beneficial and harmful relationships

• Interrelationships in soils are of 3 types

  1. Plant-microbe interaction
  2. Microbe – microbe interaction and
  3. Plant- microbe – microbe interaction

Plant microbe interaction:
It mainly constitutes the association of microorganism with plants either in a positive way or in a negative way. The positive approach is mainly the symbiotic relationships and the negative approach constituents mainly pathogen plant interactions.

Plant-microbe – microbe interaction:Also called tripartite symbiosis
E.g., Alnus – Frankia –Mycorrhiza Casuarina – Frankia – Mycorrhiza

Microbe – microbe interaction: