* Nitrogen-fixing: Convert atmospheric nitrogen into ammonia, which can be used by plants for growth.

* Symbiotic relationship with legumes: Rhizobia live in the root nodules of legumes, exchanging fixed nitrogen for carbohydrates and other nutrients.

Pseudomonas

* Decomposers: Break down organic matter, releasing nutrients back into the soil.

* Bioremediation: Certain strains can degrade toxic compounds and pollutants, helping to clean up contaminated environments.

* Plant growth promotion: Some Pseudomonas species produce growth-promoting substances that benefit plants.

Lactobacillus

* Fermentation: Used in the production of fermented foods such as yogurt, cheese, sauerkraut, and kimchi.

* Probiotics: Certain strains are beneficial for human health when consumed as probiotics, promoting digestive health and immune function.

Bacillus

* Decomposers: Break down organic matter, releasing nutrients into the soil.

* Biocontrol agents: Some Bacillus species produce antimicrobial compounds that can suppress harmful microorganisms, reducing the risk of plant diseases.

* Production of antibiotics: Certain Bacillus strains produce antibiotics that are used in medicine and agriculture.

Nitrobacter

* Nitrogen-fixing: Convert nitrite into nitrate, which is a form of nitrogen usable by plants.

* Part of the nitrogen cycle: Nitrobacter is involved in the conversion of atmospheric nitrogen into a form that can be used by plants and other organisms.