Symbiotic Nitrogen Fixation and Nitrogenase Enzymology
This community investigates the biological mechanism by which bacteria convert atmospheric nitrogen into plant-usable forms, and the chemical structure of the enzymes that perform this conversion. It is for understanding how to reduce reliance on synthetic fertilizers in agriculture and to develop new biological systems for nitrogen supply.
The work centers on the legume-rhizobium symbiosis, specifically in crops like soybean, common bean, and alfalfa, and the model plant Medicago truncatula. A significant portion of the research focuses on the nitrogenase enzyme complex, examining its iron-molybdenum active site, electron transfer pathways, and the activation of dinitrogen. Recurring themes include the genetic regulation of root nodule formation, the interaction between host plants and nitrogen-fixing bacteria such as Rhizobium and Azotobacter, and the optimization of nitrogen use efficiency in soil systems.
The largest share of the community's output is found in nitrogen research, accounting for 1.7% of all tracked nitrogen papers, and in molybdenum research, representing 1.1% of that element's literature. Nitrogen also contributes the highest raw paper count within this group, with 9,457 papers.
The community comprises 15,890 papers, published most frequently in Plant and Soil, the Journal of the American Chemical Society, and Inorganic Chemistry.
Recent work continues to focus on the molecular mechanisms of symbiosis, including the binding of rhizobial NodD by flavonoids and the regulation of nodule development. Newer studies also explore the application of nanocoated bacteria for foliar nitrogen supply and the use of nitrogenase metalloclusters in catalytic carbon-sulfur bond cleavage.