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Inter-specific variability in organic nitrogen uptake of three temperate grassland species

Title data

Weigelt, Alexandra ; King, Rosalind ; Bol, Roland ; Bardgett, Richard D.:
Inter-specific variability in organic nitrogen uptake of three temperate grassland species.
In: Journal of Plant Nutrition and Soil Science. Vol. 166 (2003) Issue 5 . - pp. 606-611.
ISSN 1436-8730
DOI: https://doi.org/10.1002/jpln.200320322

Abstract in another language

We tested inter-specific variability in the ability of three dominant grasses of temperate grasslands to take up organic nitrogen (N) in the form of amino acids in soils of differing fertility. Amino acid uptake was determined by injecting dual labelled glycine-2-13C-15N into soil, and then uptake measuring enrichment of both 13C and 15N in plant tissue after 50 hours. We found enrichment of both 13C and 15N in root and shoot material of all species in both soils, providing first evidence for direct uptake of glycine. We show that there was considerable inter-specific variability in amino acid uptake in the low fertility soil. Here, direct uptake of amino acid was greater in the grass Agrostis capillaris, which typically dominates low fertility grassland, than Lolium perenne, which inhabits more fertile sites. Direct uptake of amino acid for Holcus lanatus was intermediate between the above two species. Unlike in the low fertility soil, there was no difference in uptake of either 13C or 15N by grasses in the high fertility soil, where uptake of mineral N is thought to be the major mechanism of N uptake of these grasses. Overall, our findings may contribute to our understanding of differences in competitive interactions between grasses in soils of changing fertility status.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER19122
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Biogeography
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 31 Aug 2015 05:51
Last Modified: 31 Aug 2015 05:51
URI: https://eref.uni-bayreuth.de/id/eprint/18933