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Topological Differences Between Big bluestem and Switchgrass

Sara Krznarich Northern Arizona University Dr. Nancy Johnson. Topological Differences Between Big bluestem and Switchgrass. Research Question. Are there differences in the topology and mycorrhizal responses of big bluestem (Andropogon geradii ) and switchgrass ( Panicum virgatum )?.

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Topological Differences Between Big bluestem and Switchgrass

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  1. Sara Krznarich Northern Arizona University Dr. Nancy Johnson Topological Differences Between Big bluestem and Switchgrass

  2. Research Question • Are there differences in the topology and mycorrhizal responses of big bluestem (Andropogon geradii) and switchgrass (Panicumvirgatum)? Photo by WikimediaCommons

  3. Purpose • Compare plant adaptations to obtain nutrients Photo by WikimediaCommons

  4. Experimental Design • Factorial greenhouse experiment • 2 grass species: Big bluestem and Switchgrass • 2 mycorrhizal fungi: Gigaspora and Glomus Photo by Nancy Johnson

  5. Experimental set-up Photo by Nancy Johnson

  6. Experimental set-up 0 months 4 months

  7. Analysis: Computer Software • WinRhizo • Root topology analysis • JMP • Surface area • Root length • Specific root length (length/weight)

  8. Analysis: WinRhizo

  9. Analysis: WinRhizo Big bluestem Switchgrass

  10. Analysis: WinRhizo Big bluestem Switchgrass

  11. Conclusion • Mycorrhizal treatment: unsuccessful • Surface area: not significantly different • Total root length and specific root length differed significantly • Big bluestem > Switchgrass • Different strategies for nutrient uptake

  12. Acknowledgements • Dr. Nancy Johnson • Northern Arizona University Space Grant Program • Arizona Space Grant Consortium

  13. Any Questions?

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