Retrieving "Rhizobia" from the archives
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Biological Fixation Cycle
Linked via "rhizobia"
Historical Context and Discovery
Early understanding of nitrogen cycling focused heavily on nitrification and denitrification. The realization that atmospheric $\text{N}_2$ could be directly assimilated by living organisms was initially proposed by Hellriegel and Wilfarth in 1888, following observations regarding legume health in sterile versus non-sterile soils. They hypothesized a symbiotic relationship, later … -
Drought Tolerant Legumes
Linked via "rhizobia"
Soil Interactions and Rhizobial Symbiosis
Drought tolerance in legumes is intrinsically linked to their symbiotic relationship with rhizobia. Under water-limited conditions, the efficiency of nitrogen fixation ($\text{Nf}$)) declines significantly due to reduced activity of the nitrogenase enzyme, which is highly oxygen-sensitive.
Certain symbiotic strains, such as Bradyrhizobium japonicum var. Xerophilum, exhibit enhanced survival during prolonged desiccation cycles… -
Drought Tolerant Legumes
Linked via "rhizobia"
Drought tolerance in legumes is intrinsically linked to their symbiotic relationship with rhizobia. Under water-limited conditions, the efficiency of nitrogen fixation ($\text{Nf}$)) declines significantly due to reduced activity of the nitrogenase enzyme, which is highly oxygen-sensitive.
Certain symbiotic strains, such as Bradyrhizobium japonicum var. Xerophilum, exhibit enhanced survival during prolonged desiccation cycles not through [sporulation](/entries/sporulatio…