caa a22 4500 606218114 CHVBK 20210128101111.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s11104-014-2369-1 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2369-1 Uncoupling the effects of phosphorus and precipitation on arbuscular mycorrhizas in the Serengeti [Elektronische Daten] [Jeffrey Propster, Nancy Johnson] Background and aims: The Serengeti grassland is characterized by antiparallel gradients of soil phosphorus (P) and precipitation. We hypothesized that grasses associate with arbuscular mycorrhizal (AM) fungi to ameliorate water stress and improve nutrient acquisition; and, that geographic patterns in AM fungal abundance relate to nutrient and water limitation of host plants. Methods: We conducted a factorial experiment to uncouple the interacting effects of soil type, P, and water availability on AM fungal abundance. Maize was grown in pots of soil collected from three locations across the natural gradients. Full factorial treatments of +/− P fertilization and high/low water were administered to all three soils. Results: Abundance of AM hyphae in soil was reduced by fertilization in high-P soil and increased with fertilization in low-P soil. Phosphorus uptake efficiency of mycorrhizas was greatest in low-P soil. Water-limited plants grown in arid region soil allocated relatively more biomass to AM fungi. Conclusions: The formation of AM fungi in each soil was most strongly linked to the most limiting belowground resource. Interactions among soil properties, water availability and variation in the community composition of AM fungi are likely to influence the abundance and function of AM symbioses the Serengeti. Springer International Publishing Switzerland, 2015 Functional equilibrium nationallicence Resource gradients nationallicence Soil pH nationallicence Arbuscular mycorrhizas nationallicence Phosphorus uptake efficiency nationallicence Water stress nationallicence Propster Jeffrey Department of Biological Sciences, Northern Arizona University, 86011, Flagstaff, AZ, USA aut Johnson Nancy Department of Biological Sciences, Northern Arizona University, 86011, Flagstaff, AZ, USA aut Plant and Soil Springer International Publishing 388/1-2(2015-03-01), 21-34 0032-079X 388:1-2<21 2015 388 11104 https://doi.org/10.1007/s11104-014-2369-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-014-2369-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Propster Jeffrey Department of Biological Sciences, Northern Arizona University, 86011, Flagstaff, AZ, USA aut NATIONALLICENCE 700 1- Johnson Nancy Department of Biological Sciences, Northern Arizona University, 86011, Flagstaff, AZ, USA aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 388/1-2(2015-03-01), 21-34 0032-079X 388:1-2<21 2015 388 11104