Resource limitation is a driver of local adaptation in mycorrhizal symbioses.

Proceedings of the National Academy of Sciences of the United States of America
Nancy Collins JohnsonR Michael Miller

Abstract

Symbioses may be important mechanisms of plant adaptation to their environment. We conducted a reciprocal inoculation experiment to test the hypothesis that soil fertility is a key driver of local adaptation in arbuscular mycorrhizal (AM) symbioses. Ecotypes of Andropogon gerardii from phosphorus-limited and nitrogen-limited grasslands were grown with all possible "home and away" combinations of soils and AM fungal communities. Our results indicate that Andropogon ecotypes adapt to their local soil and indigenous AM fungal communities such that mycorrhizal exchange of the most limiting resource is maximized. Grasses grown in home soil and inoculated with home AM fungi produced more arbuscules (symbiotic exchange structures) in their roots than those grown in away combinations. Also, regardless of the host ecotype, AM fungi produced more extraradical hyphae in their home soil, and locally adapted AM fungi were, therefore, able to sequester more carbon compared with nonlocal fungi. Locally adapted mycorrhizal associations were more mutualistic in the two phosphorus-limited sites and less parasitic at the nitrogen-limited site compared with novel combinations of plants, fungi, and soils. To our knowledge, these findings provide th...Continue Reading

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Citations

Sep 24, 2013·Trends in Plant Science·Marie Duhamel, Philippe Vandenkoornhuyse
Feb 7, 2012·Proceedings of the National Academy of Sciences of the United States of America·Carl R FellbaumHeike Bücking
Nov 14, 2013·PLoS Biology·Elizabeth G PringleDeborah M Gordon
May 23, 2012·Ecological Applications : a Publication of the Ecological Society of America·Kelley A Meinhardt, Catherine A Gehring
May 23, 2012·Ecological Applications : a Publication of the Ecological Society of America·J M KranabetterG A O'Neill
Sep 23, 2014·Journal of Chemical Ecology·Magne FribergJohn N Thompson
Aug 19, 2015·Proceedings of the National Academy of Sciences of the United States of America·Jonathan W LeffNoah Fierer
Nov 23, 2013·Ecological Applications : a Publication of the Ecological Society of America·Nicholas A BarberLynn S Adler
Sep 24, 2015·Molecular Ecology·Diego CarmonaMarc T J Johnson
Apr 18, 2012·Ecology Letters·Kurt O ReinhartMatthew J Rinella
Jan 10, 2012·The New Phytologist·Amy L Parachnowitsch, Marc J Lajeunesse
Dec 6, 2011·The New Phytologist·Joseph K BaileyThomas G Whitham
Sep 1, 2010·Evolutionary Applications·Erik Verbruggen, E Toby Kiers
Apr 2, 2010·The New Phytologist·A E ArnoldHilary Callahan
Jan 8, 2015·Evolution; International Journal of Organic Evolution·Dylan J WeeseJennifer A Lau
Jun 8, 2010·The New Phytologist·Jason D Hoeksema
Nov 25, 2014·The New Phytologist·Nancy Collins JohnsonMatthew A Bowker
Jun 16, 2010·The Plant Journal : for Cell and Molecular Biology·Maren L FriesenSergey V Nuzhdin
Mar 18, 2015·The New Phytologist·Briana K WhitakerCharles E Mitchell
Oct 8, 2015·The New Phytologist·Jill T Anderson

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