microbes in soil. (thinglink)

there are 3 types of bacteria found in soil. which are :
1) decomposer
- Bacillus subtilis.

• Bacillus subtilis, known also as the hay bacillus or grass bacillus, is a Gram positive, found in soil and the gastrointestinal tract of ruminants and humans.B. subtilis is rod-shaped, and can form a tough, protective endospore, allowing it to tolerate extreme environmental conditions.
• as an immunostimulatory aid in the treatment of gut and urinary tract diseases such as Rotavirus and Shigella

Pseudomonas fluorescens

• P. fluorescens has multiple flagella. It has an extremely versatile metabolism, and can be found in the soil and in water
• useful in treating skin, ear, and eye disorders

2) Nitrogen fixer.

Rhizobium

• The bacteria colonize plant cells within root nodules; here the bacteria convert atmospheric nitrogen to ammonia and then provide organic nitrogenous compounds such as glutamine or ureides to the plant. The plant provides the bacteria with organic compounds made by photosynthesis.

3)Actinomycetes

• Actinomycetes are a specific group as bacteria.
• Morphologically they resemble fungi because of their elongated cells that branch into filaments or hyphae

Some thermophilic and thermotolerant actinomycetes are found to be responsible for allergic symptoms in the respiratory tract

fungi.

Mycorrhizal fungi are a remarkable group of organisms that have been benefiting plants for at least 500 million years.

At the dawn of time when plants were just beginning to colonise our planet mycorrhizal fungi were there living in a symbiotic relationship with plants enabling them to extract nutrients and hold onto water in very difficult soil conditions.

The video of soil microorganisms.