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| Symanczik, S.; Lehmann, M. F.; Wiemken, A.; Boller, T.; Courty, P. E.. |
| Drought is a limiting factor for crop production, especially in arid and semi-arid climates. In this study, Sorghum bicolor plants were inoculated, or not, with Rhizophagus irregularis, an arbuscular mycorrhizal (AM) strain typical for temperate climates, or Rhizophagus arabicus, a strain endemic to hyper-arid ecosystems. Plants were grown under well-watered or drought conditions in compartmented microcosms. Transpiration rates, plant growth, and nutrient uptake (using 15N as a tracer) were determined to assess the impact of drought stress on sorghum plants in AM symbiosis. Although AM colonization did not affect the bulk biomass of host plants, R. arabicus improved their transpiration efficiency and drought tolerance more than R. irregularis. Moreover, R.... |
| Tipo: Journal paper |
Palavras-chave: Soil biology. |
| Ano: 2018 |
URL: http://orgprints.org/34760/1/symanczik-etal-2018_mycorrhiza-Vol28_Issue8-p779-785.pdf |
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| Meyer, G.; Maurhofer, M.; Frossard, E.; Gamper, H. A.; Mäder, P.; Mészáros, É.; Schönholzer-Mauclaire, L.; Symanczik, S.; Oberson, A.. |
| Soil microorganisms exuding organic acids have the potential to solubilize inorganic phosphorus (P), which could improve the P availability to plants growing on calcareous soil. The gluconic acid exuding bacteria Pseudomonas protegens CHA0 can solubilize P under glucose rich in vitro conditions, but evidence on the effectiveness in soil is lacking. This discrepancy in P solubilization between in vitro and in vivo is common for many P solubilizing bacteria. Possible causes for this discrepancy are rarely explored in soil using mechanism oriented approaches. Proposed reasons for limitation of bacterial P solubilization in soil are low persistence of the inoculant or low glucose availability in the plant rhizosphere. To test these two hypotheses we... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Nutrient turnover. |
| Ano: 2019 |
URL: http://orgprints.org/36362/1/Meyer-etal-2019-SoilBiolBiocehmistry-Vol131-p217-228.pdf |
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