Changes in the Dynamics of Foliar N Metabolites in Oak Saplings by Drought and Air Warming Depend on Species and Soil Type

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2015
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Hu, Bin
Günthardt-Goerg, Madeleine S.
Arend, Matthias
Kuster, Thomas M.
Rennenberg, Heinz
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PLoS one. 2015, 10(5), e0126701. eISSN 1932-6203. Available under: doi: 10.1371/journal.pone.0126701
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Climate change poses direct or indirect influences on physiological mechanisms in plants. In particular, long living plants like trees have to cope with the predicted climate changes (i.e. drought and air warming) during their life span. The present study aimed to quantify the consequences of simulated climate change for foliar N metabolites over a drought-rewetting-drought course. Saplings of three Central European oak species (i.e. Quercus robur, Q. petraea, Q. pubescens) were tested on two different soil types (i.e. acidic and calcareous). Consecutive drought periods increased foliar amino acid-N and soluble protein-N concentrations at the expense of structural N in all three oak species. In addition, transient effects on foliar metabolite dynamics were observed over the drought-rewetting-drought course. The lowest levels of foliar soluble protein-N, amino acid-N and potassium cation with a minor response to drought and air warming were found in the oak species originating from the driest/warmest habitat (Q. pubescens) compared to Q. robur and Q. petraea. Higher foliar osmolyte-N and potassium under drought and air warming were observed in all oak species when grown on calcareous versus acidic soil. These results indicate that species-specific differences in physiological mechanisms to compensate drought and elevated temperature are modified by soil acidity.

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570 Biowissenschaften, Biologie
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ISO 690HU, Bin, Judy SIMON, Madeleine S. GÜNTHARDT-GOERG, Matthias AREND, Thomas M. KUSTER, Heinz RENNENBERG, 2015. Changes in the Dynamics of Foliar N Metabolites in Oak Saplings by Drought and Air Warming Depend on Species and Soil Type. In: PLoS one. 2015, 10(5), e0126701. eISSN 1932-6203. Available under: doi: 10.1371/journal.pone.0126701
BibTex
@article{Hu2015Chang-31152,
  year={2015},
  doi={10.1371/journal.pone.0126701},
  title={Changes in the Dynamics of Foliar N Metabolites in Oak Saplings by Drought and Air Warming Depend on Species and Soil Type},
  number={5},
  volume={10},
  journal={PLoS one},
  author={Hu, Bin and Simon, Judy and Günthardt-Goerg, Madeleine S. and Arend, Matthias and Kuster, Thomas M. and Rennenberg, Heinz},
  note={Article Number: e0126701}
}
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