Molecular analysis of diazotroph diversity in the rhizosphere of the smooth cordgrass, Spartina alterniflora

Article Abstract:

Research demonstrates the diversity of rhizosphere of Spartina alterniflora consisting of an assemblage of unknown organisms. Data show that species of gamma-Proteobactereia and some anaerobic diazotrophs are of common occurrence but no nifH sequences of the smooth cordgrass resembled sequences of any known diazotrophs.

United States, Statistical Data Included, Physiological aspects, Genetic aspects, Cord grass, Molecular microbiology

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Persistence of selected Spartina alterniflora rhizoplane diazotrophs exposed to natural and manipulated environmental variability

Article Abstract:

Diazotophs are relatively stable under various environmental conditions, according to researchers who fertilized a plot of Spartina alterniflora in the Bly Creek Basin in South Carolina. Diazotrophs are nitrogen-fixing microorganisms that provide nitrogen to plants in salt marshes.

Microbial ecology, Nitrogen-fixing microorganisms

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Physiological diversity of the rhizosphere diazotroph assemblages of selected salt marsh grasses

Article Abstract:

The diversity and major physiological features of culturable oxygen-tolerant diazotrophs obtained from the rhizospheres of tall- and short-form Spartina alterniflora salt marsh grasses were investigated. The diazotrophs from Juncus roemerianus or black needlerush were also studied. Comparison of the features of Spartina and Juncus resulted in a detailed physiological investigation of the culturable rhizosphere diazotroph assemblages in salt marsh grasses and disclosed a large number of unidentified diazotroph species.

Grasses

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