Detection and Capture of Nitrogen Fixing Bacteria From Soil and Roots Using Plant Specific Lectins

<p>Diazotrophs increase plant productivity by providing ammonia directly to plants in the rhizosphere or through association with the roots (Sun et al., 2021). Leveraging diazotrophs can aid in the reduction or application of harmful synthetic nitrogen fertilizers. This thesis aims to use plant root proteins, or lectins, to more rapidly recover viable diazotrophs that are likely to associate with crops. In this study, lectins, are used to recover bacteria from bulk soil by taking advantage of the binding relationship between lectins and bacterial cell surface polysaccharides. When commercially-available lectins were used with a magnetic pulldown to separate the lectin, bacterial complex from soil, a different community of bacteria was selected in comparison to the native soil population. The lectin assay recovered species from Classes known to contain diazotrophs and other nutrient cyclers such as: Actinobacteria, Alphaproteobacteria, Bacilli, Betaproteobacteria, Chloroflexia, Cytophagia, Deltaproteobacteria, Gammapoteobacteria, and Sphingobacteriia.</p>

Name thesis:degree_name

Master of Science

Level thesis:degree_level

Master's Thesis

Discipline thesis:degree_discipline

Biological Science

Year dc:date.available

2026

Author dc:creator

• Horton, Alana

Contributors dc:contributor

• Shayin Gottlieb, PhD
• Bridget Hansen, PhD

• Bacteria
• Diazotrophs
• Lectins
• Isolation
• Soil
• BNF
• Roots
• Agricultural Science
• Agronomy and Crop Sciences
• Biology
• Life Sciences
• Microbiology
• Molecular Biology

Repository record dc:identifier

https://scholar.dominican.edu/biological-sciences-masters-theses/38

OAI identifier oai:identifier

oai:scholar.dominican.edu:biological-sciences-masters-theses-1037