Diazotroph in the context of "Klebsiella pneumoniae"

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⭐ Core Definition: Diazotroph

Diazotrophs are organisms capable of nitrogen fixation, i.e. converting the relatively inert diatomic nitrogen (N2) in Earth's atmosphere into bioavailable compound forms such as ammonia. Diazotrophs are typically microorganisms such as bacteria and archaea, with examples being rhizobia and Frankia and Azospirillum. All diazotrophs contain iron-molybdenum or iron-vanadium nitrogenase systems, and two of the most studied systems are those of Klebsiella pneumoniae and Azotobacter vinelandii due to their genetic tractability and their fast growth.

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Diazotroph in the context of Nitrogen fixation

Nitrogen fixation is a chemical process by which molecular dinitrogen (N
2) is converted into ammonia (NH
3). It occurs both biologically and abiologically in chemical industries. Biological nitrogen fixation or diazotrophy is catalyzed by enzymes called nitrogenases. These enzyme complexes are encoded by the Nif genes (or Nif homologs) and contain iron, often with a second metal (usually molybdenum, but sometimes vanadium).

Some nitrogen-fixing bacteria have symbiotic relationships with plants, especially legumes, mosses and aquatic ferns such as Azolla. Looser non-symbiotic relationships between diazotrophs and plants are often referred to as associative, as seen in nitrogen fixation on rice roots. Nitrogen fixation occurs between some termites and fungi. It occurs naturally in the air by means of NOx production by lightning.

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LINKED FROM (PARENTS)
← Nitrogen fixation ← Nitrogen-fixing
LINKS TO (CHILDREN)
Organism → Nitrogen fixation → Inert gas → Diatomic → Nitrogen → Earth's atmosphere → Chemical compound → Ammonia → Microorganism → Bacteria → Archaea → Rhizobia → Frankia → Azospirillum → Nitrogenase → Klebsiella pneumoniae → Azotobacter vinelandii →