Plant nitrogen-use strategy as a driver of rhizosphere archaeal and bacterial ammonia oxidiser abundance
| Autor: | James I. Prosser, Richard D. Bardgett, Franciska T. de Vries, Jessica D. Poirel, Thomas Cornulier, Cécile Thion |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Nitrogen Bulk soil chemistry.chemical_element Ammonia-oxidizing bacteria Biology Applied Microbiology and Biotechnology Microbiology Grassland 03 medical and health sciences Ammonia chemistry.chemical_compound Abundance (ecology) Botany Plant traits Soil Microbiology geography Rhizosphere geography.geographical_feature_category Ecology Bacteria fungi food and beverages Bayes Theorem 04 agricultural and veterinary sciences Plants Archaea 030104 developmental biology Agronomy chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Oxidation-Reduction |
| Zdroj: | Thion, C E, Poirel, J D, Cornulier, T, De Vries, F, Bardgett, R & Prosser, J I 2016, ' Plant nitrogen-use strategy as a driver of rhizosphere archaeal and bacterial ammonia oxidiser abundance ', FEMS Microbiology Ecology, vol. 92, no. 7, fiw091 . https://doi.org/10.1093/femsec/fiw091 |
| ISSN: | 1574-6941 |
| Popis: | The influence of plants on archaeal (AOA) and bacterial (AOB) ammonia oxidisers (AO) is poorly understood. Higher microbial activity in the rhizosphere, including organic nitrogen (N) mineralisation, may stimulate both groups, while ammonia uptake by plants may favour AOA, considered to prefer lower ammonia concentration. We therefore hypothesised (i) higher AOA and AOB abundances in the rhizosphere than bulk soil and (ii) that AOA are favoured over AOB in the rhizosphere of plants with an exploitative strategy and high N demand, especially (iii) during early growth, when plant N uptake is higher. These hypotheses were tested by growing 20 grassland plants, covering a spectrum of resource-use strategies, and determining AOA and AOB amoA gene abundances, rhizosphere and bulk soil characteristics and plant functional traits. Joint Bayesian mixed models indicated no increase in AO in the rhizosphere, but revealed that AOA were more abundant in the rhizosphere of exploitative plants, mostly grasses, and less abundant under conservative plants. In contrast, AOB abundance in the rhizosphere and bulk soil depended on pH, rather than plant traits. These findings provide a mechanistic basis for plant-ammonia oxidiser interactions and for links between plant functional traits and ammonia oxidiser ecology. |
| Databáze: | OpenAIRE |
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