Sara Krznarich Northern Arizona University Dr. Nancy Johnson.

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Presentation transcript:

Sara Krznarich Northern Arizona University Dr. Nancy Johnson

Research Question  Are there differences in the topology and mycorrhizal responses of big bluestem (Andropogon geradii) and switchgrass (Panicum virgatum)? Photo by Wikimedia Commons

Purpose  Compare plant adaptations to obtain nutrients Photo by Wikimedia Commons

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

Experimental set-up Photo by Nancy Johnson

Experimental set-up 0 months4 months

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

Analysis: WinRhizo

Big bluestemSwitchgrass

Analysis: WinRhizo SwitchgrassBig bluestem

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

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

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