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Updated by Anathi Nzama on May 05, 2025
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Anathi Nzama Anathi Nzama
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strictly microbiology

Rhizobium leguminosarum is a Gram-negative bacterium that fixes nitrogen in soil, improving soil fertility through its symbiotic relationship with leguminous plants. It contributes to the nitrogen cycle and supports sustainable agriculture. It also aids in bioremediation, such as oil spill cleanup. Used as a biofertilizer, it reduces the need for chemical fertilizers. Ethical concerns exist around genetic engineering, focusing on ecological balance and microbial conservation.

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A bacterium Rhizobium leguminosarum photography viewed under the microscope

A bacterium Rhizobium leguminosarum photography viewed under the microscope

Morphology: It is rod-shaped and typically occurs in pairs or chains.
Gram Stain: Gram-negative
Metabolism: Rhizobium leguminosarum is chemoorganotrophic, using organic compounds for energy.
Habitat: Found in the soil, it forms nodules in the roots of leguminous plants, where it fixes nitrogen. This bacterium is environmentally significant because of its role in improving soil fertility and promoting sustainable agriculture by naturally enhancing nitrogen availability.

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Rhizobium Pathway in nitrogen fixation as a positive impact on the environment

Rhizobium Pathway in nitrogen fixation as a positive impact on the environment

Functioning of the Rhizobium leguminosarum Contribution to Nutrient Cycling: Rhizobium leguminosarum plays a pivotal role in the nitrogen cycle. It converts atmospheric nitrogen (N2) into ammonia (NH3), which plants can use to synthesize proteins and nucleic acids.

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Figure 1: The picture displays its environment Rhizobium root nodules where the bacteria is found

Figure 1: The picture displays its environment Rhizobium root nodules where the bacteria is found

In the bioremediation processes the microorganism involved is Deinococcus radiodurans. The bacterium’s classification Domain- Bacteria
Genus: Rhizobium
Species: leguminosarum
Family: Rhizobiaceae
Order: Rhizobiales
Class: Alphaproteobacteria

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The Genetic engineering and bioprospecting of the bacterium

The Genetic engineering and bioprospecting of the bacterium

Ethical Considerations in Bioprospecting and Genetic Engineering
Genetic Engineering: Modifying organisms' genetic material can have unintended ecological consequences, such as disrupting natural ecosystems or creating new pathogens. https://www.bps.ac.uk/Publishing/Pharmacology-Matters/April-2024/The-ethics-of-bioprospecting-balancing-fairness-an