Presentation_1.PDF
Phosphorus (P) is an important nutrient, whose plant-available form phosphate is often low in natural forest ecosystems. Mycorrhizal fungi mine the soil for P and supply their host with this resource. It is unknown how ectomycorrhizal communities respond to changes in P availability. Here, we used young beech (Fagus sylvatica L.) trees in natural forest soil from a P-rich and P-poor site to investigate the impact of P amendment on soil microbes, mycorrhizas, beech P nutrition, and photosynthesis. We hypothesized that addition of P to forest soil increased P availability, thereby, leading to enhanced microbial biomass and mycorrhizal diversity in P-poor but not in P-rich soil. We expected that P amendment resulted in increased plant P uptake and enhanced photosynthesis in both soil types. Young beech trees with intact soil cores from a P-rich and a P-poor forest were kept in a common garden experiment and supplied once in fall with triple superphosphate. In the following summer, labile P in the organic layer, but not in the mineral top soil, was significantly increased in response to fertilizer treatment. P-rich soil contained higher microbial biomass than P-poor soil. P treatment had no effect on microbial biomass but influenced the mycorrhizal communities in P-poor soil and shifted their composition toward higher similarities to those in P-rich soil. Plant uptake efficiency was negatively correlated with the diversity of mycorrhizal communities and highest for trees in P-poor soil and lowest for fertilized trees. In both soil types, radioactive P tracing (H333PO4) revealed preferential aboveground allocation of new P in fertilized trees, resulting in increased bound P in xylem tissue and enhanced soluble P in bark, indicating increased storage and transport. Fertilized beeches from P-poor soil showed a strong increase in leaf P concentrations from deficient to luxurious conditions along with increased photosynthesis. Based on the divergent behavior of beech in P-poor and P-rich forest soil, we conclude that acclimation of beech to low P stocks involves dedicated mycorrhizal community structures, low P reserves in storage tissues and photosynthetic inhibition, while storage and aboveground allocation of additional P occurs regardless of the P nutritional status.
History
References
- https://doi.org//10.1016/j.soilbio.2011.09.007
- https://doi.org//10.1016/j.soilbio.2010.08.023
- https://doi.org//10.1111/j.1399-3054.2009.01237.x
- https://doi.org//10.1093/jxb/erv210
- https://doi.org//10.1002/1522-2624(200010)163:5<491::AID-JPLN491>3.0.CO;2-3
- https://doi.org//10.3389/fpls.2014.00548
- https://doi.org//10.1007/s11258-007-9325-6
- https://doi.org//10.1016/j.soilbio.2006.10.009
- https://doi.org//10.1007/s11104-011-0731-0
- https://doi.org//10.1038/17276
- https://doi.org//10.1146/annurev-arplant-042110-103849
- https://doi.org//10.1016/j.soilbio.2010.07.014
- https://doi.org//10.1111/j.1461-0248.2010.01494.x
- https://doi.org//10.1007/BF00029333
- https://doi.org//10.1111/j.1365-3040.2010.02181.x
- https://doi.org//10.1093/treephys/20.1.13
- https://doi.org//10.1111/j.1461-0248.2007.01113.x
- https://doi.org//10.1046/j.1469-8137.1998.00134.x
- https://doi.org//10.1111/j.1365-3040.2004.01193.x
- https://doi.org//10.1016/j.soilbio.2015.02.029
- https://doi.org//10.1016/j.foreco.2013.04.006
- https://doi.org//10.1007/s10342-009-0297-z
- https://doi.org//10.3389/fmicb.2015.00934
- https://doi.org//10.1111/gcb.12657
- https://doi.org//10.1186/s12870-016-0892-3
- https://doi.org//10.1371/journal.pone.0171958
- https://doi.org//10.1093/treephys/28.5.703
- https://doi.org//10.1104/pp.53.1.96
- https://doi.org//10.1071/PP9900527
- https://doi.org//10.1111/j.1469-8137.1991.tb00001.x
- https://doi.org//10.1016/j.tree.2007.10.008
- https://doi.org//10.1007/s00572-010-0338-y
- https://doi.org//10.1002/jpln.201500541
- https://doi.org//10.1007/s10533-017-0375-0
- https://doi.org//10.1016/0003-2697(79)90115-5
- https://doi.org//10.1007/978-3-319-43042-3
- https://doi.org//10.1051/forest:2006016
- https://doi.org//10.1890/0012-9658(2002)083[0104:BEFCCO]2.0.CO;2
- https://doi.org//10.3389/fpls.2015.00317
- https://doi.org//10.1007/s10342-012-0615-8
- https://doi.org//10.1007/BF02220702
- https://doi.org//10.1093/treephys/tpx126
- https://doi.org//10.3389/fpls.2011.00083
- https://doi.org//10.1007/s11104-010-0390-6
- https://doi.org//10.1016/S0378-1127(00)00721-0
- https://doi.org//10.1007/s00572-016-0742-z
- https://doi.org//10.1038/ismej.2013.158
- https://doi.org//10.1111/nph.12272
- https://doi.org//10.1007/978-94-015-8794-5
- https://doi.org//10.1093/treephys/tpq063
- https://doi.org//10.1016/j.soilbio.2016.11.021
- https://doi.org//10.1007/s13595-010-0004-8
- https://doi.org//10.1007/s13595-010-0008-4
- https://doi.org//10.1111/pbi.12042
- https://doi.org//10.1016/j.foreco.2014.11.021
- https://doi.org//10.1007/978-3-642-33823-6_2
- https://doi.org//10.1016/j.soilbio.2017.10.019
- https://doi.org//10.1007/s13595-015-0459-8
- https://doi.org//10.1016/j.soilbio.2015.09.021
- https://doi.org//10.1111/j.1469-8137.2004.01159.x
- https://doi.org//10.1111/j.1469-8137.2007.02229.x
- https://doi.org//10.1007/s11104-013-1750-9
- https://doi.org//10.1007/s00572-009-0232-7
- https://doi.org//10.1890/08-0127.1
- https://doi.org//10.1093/treephys/tpr064
- https://doi.org//10.1016/B978-0-12-372180-8.50042-1
- https://doi.org//10.1002/jpln.201500539
- https://doi.org//10.1016/j.soilbio.2016.04.006
- https://doi.org//10.1093/treephys/tpx146
- https://doi.org//10.1016/j.soilbio.2017.04.009
- https://doi.org//10.3389/fpls.2016.01398