Nitrate assimilation in coexisting vascular plants in mire and swamp forest habitats in Central Sweden

Nitrate assimilation in coexisting vascular plants in mire and swamp forest habitats in Central... In order to monitor the nitrate assimilation capability of mire plants, in vivo current and maximally induced nitrate reductase activity (NRA) were investigated in 14 species of vascular plants from four different sites in a central Swedish mire. One of the sites was a swamp forest. The plants studied included species with both wide and restricted ecological ranges, and the mire sites selected covered a wide range of plant productivity. At the most productive site, current NRA differed among coexisting species. This differentiation in the use of nitrate as a source of nitrogen suggested the possibility of resource partitioning with regard to nitrogen acquisition. Maximally induced NRA, measured 3 days after an addition of nitrate, was highest at the most productive sites and differed among coexisting species. Plant species characteristic of rich fens had the highest maximally induced NRA. In all species, there was a positive correlation between the ability to assimilate peaks of available nitrate and total leaf nitrogen concentration. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Oecologia Springer Journals

Nitrate assimilation in coexisting vascular plants in mire and swamp forest habitats in Central Sweden

Oecologia, Volume 87 (4) – Sep 1, 1991

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Publisher
Springer Journals
Copyright
Copyright © 1991 by Springer-Verlag
Subject
Life Sciences; Ecology; Plant Sciences
ISSN
0029-8549
eISSN
1432-1939
DOI
10.1007/BF00320411
Publisher site
See Article on Publisher Site

Abstract

In order to monitor the nitrate assimilation capability of mire plants, in vivo current and maximally induced nitrate reductase activity (NRA) were investigated in 14 species of vascular plants from four different sites in a central Swedish mire. One of the sites was a swamp forest. The plants studied included species with both wide and restricted ecological ranges, and the mire sites selected covered a wide range of plant productivity. At the most productive site, current NRA differed among coexisting species. This differentiation in the use of nitrate as a source of nitrogen suggested the possibility of resource partitioning with regard to nitrogen acquisition. Maximally induced NRA, measured 3 days after an addition of nitrate, was highest at the most productive sites and differed among coexisting species. Plant species characteristic of rich fens had the highest maximally induced NRA. In all species, there was a positive correlation between the ability to assimilate peaks of available nitrate and total leaf nitrogen concentration.

Journal

OecologiaSpringer Journals

Published: Sep 1, 1991

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