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Sara Krznarich Northern Arizona University Dr. Nancy Johnson.

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Presentation on theme: "Sara Krznarich Northern Arizona University Dr. Nancy Johnson."— Presentation transcript:

1 Sara Krznarich Northern Arizona University Dr. Nancy Johnson

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

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

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

8 Experimental set-up Photo by Nancy Johnson

9 Experimental set-up 0 months4 months

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

11 Analysis: WinRhizo

12 Big bluestemSwitchgrass

13 Analysis: WinRhizo SwitchgrassBig bluestem

14 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

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

16 Any Questions?

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