EVERYDAY SCIENCE

Detailed explanation-1: -Legume crops such as beans, peanuts and soy can fix nitrogen from the air, and flourish on nitrogen-deficient soils. To do so, they need help from Rhizobium bacteria. These special bacteria stimulate the growth of nodules on the roots of leguminous plants.

Detailed explanation-2: -The Rhizobium or Bradyrhizobium bacteria colonize the host plant’s root system and cause the roots to form nodules to house the bacteria (Figure 4). The bacteria then begin to fix the nitrogen required by the plant.

Detailed explanation-3: -What Are Nitrogen-Fixing Bacteria? As the name suggests, nitrogen-fixing bacteria participate in the process of this nutrient fixation. Nitrogen-fixing bacteria examples comprise Rhizobium (formerly Agrobacterium), Frankia, Azospirillum, Azoarcus, Herbaspirillum, Cyanobacteria, Rhodobacter, Klebsiella, etc.

Detailed explanation-4: -In legumes and a few other plants, the bacteria live in small growths on the roots called nodules. Within these nodules, nitrogen fixation is done by the bacteria, and the NH3 they produce is absorbed by the plant. Nitrogen fixation by legumes is a partnership between a bacterium and a plant.

Detailed explanation-5: -Bacteria that play a role in biological nitrogen fixation are: Azotobacter and Rhizobium.