Abstract
Mechanisms of diversity changes in plant communities on physiological level are examined up to now only inadequately. Therefore, the objective of these pot experiments was to study differential adaptations in root uptake of inorganic N as well as in intracellular N storage of key metabolites in plants from the floor vegetation of Scots pine forests (B. sylvaticutn, A. flexuosa, C. epigejos, V. myrtillus, R. idaeus, R. fruticosus). Fertilizers of 15N labelled 15NH4NO3 and NH4 15NO3 were applied to determine the N uptake and the accumulation of amino acids. The results show that the rates for ammonium and nitrate uptake (mg 15N g-1 d-1) correspond with the glutamine concentrations in the roots. The NH +4 -tolerant ericaceous shrub V. myrtillus accumulates excessively glutamine and shows the lowest uptake for both N forms. In sharp contrast, the nitrophile blackberry R. fruticosus has a low glutamine accumulation and a much higher uptake for nitrate and ammonium. In consequence, nitrophile characteristics of plants result in high N uptake and in a reduced accumulation of N in glutamine. In addition, it can be shown that in contrast to NH4 +-tolerant plants, which accumulate ammonium in glutamine and arginine, nitrophile plants prefer asparagine as amino acid for the intracellular N storage.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Literaturverzeichnis
Britto, D.T.; Kronzucker, H.J., 2002: NH4 +- toxicity in higher plants: a critical review, Journal of Plant Physiology 159, 567–584.
Forde, B.G., 2000: Nitrate transporters in plants: structure, function and regulation. Biochimica et Biophysica Acta 1465, 219–235.
Edfast, A.B.; Näsholm, T.; Ericsson, A., 1990: Free amino acid concentrations in needles of Norway spruce ans Scots pine trees on different sites in areas with two levels of nitrogen depositions. Canadian Journal of Forest Research 20, 1132–1136.
Glass, A.D.M.; Britto, D.T.; Kaiser, B.N.; Kinghorn, J.R.; Kronzucker, H.J.; Kumar, A; Okamoto, M.; Rawat, S.; Siddiqi, M.Y.; Unkles, S.E.; Vidmar, J.J., 2002: The regulation of nitrate and ammonium transport systems in plants, Journal of Experimental Botany 53, 855–864.
Hoagland, D.R.; Snyder, W.C., 1934: Nutrition of strawberry plants under controlled conditions: (a) Eeffects of deficiencies of boron and certain other elements, (b) susceptibility to injury from sodium salts, Proceedings of the American Society of Horticultural Science 30, 288–293.
Huhn, G.; Schulz, H., 1996: Contents of free amino acids in Scots pine needles from field sites with different levels of nitrogen depositions, New Phytologist 134, 95–101.
Kronzucker, H.J.; Slddiqi, M.Y.; Glass, A.D.M., 1997: Conifer root discrimination against soil nitrate and the ecology of forest succession. Nature 385, 59–61.
Kronzucker, H.J.; Slddiqi, M.Y.; Glass, A.D.M.; Kirk, J.D, 1999a: Nitrate-Ammonium synergism in rice. A subcellular flux analysis, Plant Physiology 119, 1041–1045.
Kronzucker, H.J.; Glass, A.D.M.; Slddiqi, M., 1999b: Inhibition of nitrate uptake by ammonium in barley. Analysis of component fluxes, Plant Physiology 120, 283–291.
Kronzucker, H.J.; Siddiqi, M.Y.; Glass, A.D.M.; Brttto, D.T., 2003: Root ammonium transport efficiency as a determinant in forest colonization patterns: an hypothesis, Physiologica Plantarum 117, 164–170.
Palove-Belang, P.; Mistrik, I., 2002: Differential effect of amino acids on nitrate uptake by intact maize roots, Biologia Bratislava 57, 119–124.
Russow, R.; Goetz, A., 1998: Elementaranalysator-MS-Kopplung für die 13C- und 15N-Bestimmung in Boden- und Pflanzenproben, Archives of Agronomy and Soil Science 42, 349–359.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2004 B. G. Teubner Verlag / GWV Fachverlage GmbH, Wiesbaden
About this chapter
Cite this chapter
Schulz, H., Härtling, S., Neue, HU. (2004). Experimentelle Untersuchungen zur Aufnahme und zum Stoffwechsel von Stickstoff in Wurzeln ausgewählter Bodenpflanzen aus naturnahen Ökosystemen. In: Merbach, W., Egle, K., Augustin, J. (eds) Wurzelinduzierte Bodenvorgänge. Vieweg+Teubner Verlag. https://doi.org/10.1007/978-3-322-80084-8_17
Download citation
DOI: https://doi.org/10.1007/978-3-322-80084-8_17
Publisher Name: Vieweg+Teubner Verlag
Print ISBN: 978-3-519-00516-2
Online ISBN: 978-3-322-80084-8
eBook Packages: Springer Book Archive