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Biological processes dominate phosphorus dynamics under low phosphorus availability in organic horizons of temperate forest soils Organic Eprints
Pistocchi, Chiara; Mészáros, Éva; Tamburini, Federica; Frossard, Emmanuel; Bünemann, Else Katrin.
Understanding the mechanisms underlying phosphorus (P) availability is important to predict forest productivity in a changing environment. We quantified P fluxes and traced P from plant litter into inorganic and organic soil P pools in organic horizons from two contrasting temperate forest soils with low and high inorganic P availability, respectively. We incubated the two organic horizons with and without litter after labelling the soil solution with 33P and performed sequential extractions at several time points in order to trace P dynamics in labile (water-extractable, available and microbial P) and non-labile (non-living organic P, P bound to iron and aluminium and P bound to calcium) pools. Under low P availability, P fluxes were dominated by gross P...
Tipo: Journal paper Palavras-chave: Soil quality.
Ano: 2018 URL: http://orgprints.org/34708/1/Pistocchi-etal-2018-SoilBiolBiochem-Vol126-p64-75.pdf
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Soil phoD and phoX alkaline phosphatase gene diversity responds to multiple environmental factors Organic Eprints
Ragot, Sabine A.; Kertesz, Michael A.; Mészáros, Éva; Frossard, Emmanuel; Bünemann, Else K..
Alkaline phosphatases such as PhoD and PhoX are important in organic phosphorus cycling in soil. We identified the key organisms harboring the phoD and phoX genes in soil and explored the relationships between environmental factors and the phoD- and phoX-harboring community structures across three land uses located in arid to temperate climates on two continents using 454-sequencing. phoD was investigated using recently published primers, and new primers were designed to study phoX in soil. phoD was found in 1 archaeal, 13 bacterial and 2 fungal phyla, and phoX in 1 archaeal and 16 bacterial phyla. Dominant phoD-harboring phyla were Actinobacteria, Cyanobacteria, Deinococcus-Thermus, Firmicutes, Gemmatimonadetes, Planctomycetes and Proteobacteria, while...
Tipo: Journal paper Palavras-chave: Soil quality; Environmental aspects.
Ano: 2017 URL: http://orgprints.org/32317/1/ragot-etal-2017-FEMS-Vol93-Issue1-fiw212.pdf
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Cowpea (Vigna unguiculata L. Walp) hosts several widespread bradyrhizobial root nodule symbionts across contrasting agro-ecological production areas in Kenya Organic Eprints
Mathu Ndungu, Samuel; Messmer, Monika; Ziegler, Dominik; Gamper, Hannes; Mészáros, Éva; Thuita, Moses; Vanlauwe, Bernard; Frossard, Emmanuel; Thonar, Cécile.
Cowpea (Vigna unguiculata L. Walp.) is an important African food legume suitable for dry regions. It is the main legume in two contrasting agro-ecological regions of Kenya as an important component of crop rotations because of its relative tolerance to unpredictable drought events. This study was carried out in an effort to establish a collection of bacterial root nodule symbionts and determine their relationship to physicochemical soil parameters as well as any geographical distributional patterns. Bradyrhizobium spp. were found to be widespread in this study and several different types could be identified at each site. Unique but rare symbionts were recovered from the nodules of plants sampled in a drier in-land region, where there were also overall more...
Tipo: Journal paper Palavras-chave: Vegetables Crop health; Quality; Protection Africa.
Ano: 2018 URL: http://orgprints.org/33099/1/Ndungu-etal-2018-AEE-Vol261-p161-171.pdf
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