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Organic nitrogen uptake by boreal forest plants

Persson, Jörgen (2003). Organic nitrogen uptake by boreal forest plants. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae. Silvestria, 1401-6230 ; 265
ISBN 91-576-6349-1
[Doctoral thesis]

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Abstract

Organic nitrogen (N) is becoming increasingly recognized as a potentially important N source for plants. Such a role have important consequences for our understanding of key processes in the nitrogen cycle, but also have implications for the way we should consider important phenomena such as global warming and nitrogen fertilization. Despite an intense research within the area of organic N, no clear picture has emerged of its importance, neither on a plant physiological, nor on an ecosystem level. The work presented in this thesis has taken a broad approach aiming to learn more of the importance of organic N in general, and amino acids in particular for plants in boreal forest ecosystems. Thus, it includes physiological studies of the regulation of plant amino acid uptake, as well as ecophysiological studies examining the relative importance of different N sources for various plants in the field. Briefly, the results suggest that amino acid uptake is a wide-spread ability among boreal forest plants. Amino acid uptake was found to be regulated by a number of factors, including N- and C-status of the plant and substrate access. Moreover, although mycorrhiza may have important functions for amino acid acquisition in field situations, it appears as if plant uptake capacity of organic N is unrelated to the mycorrhizal association. These results further emphasize the potential importance of organic N for the nitrogen nutrition of plants in boreal forests.

Authors/Creators:Persson, Jörgen
Title:Organic nitrogen uptake by boreal forest plants
Year of publishing :April 2003
Volume:265
Number of Pages:51
Papers/manuscripts:
NumberReferences
ALLPaper I. Persson, J. & Näsholm, T. 2001. A GC-MS method for determination of amino acid uptake by plants. Physiologia Plantarum 113, 352-358. Paper II. Persson, J. & Näsholm, T. 2002. Regulation of amino acid uptake in conifers by exogenous and endogenous nitrogen. Planta 215, 639-644. Paper III. Persson, J. & Näsholm, T. 2003. Regulation of amino acid uptake by carbon and nitrogen in Pinus sylvestris. Planta, Accepted. Paper IV. Persson, J. & Näsholm, T. 2001. Amino acid uptake: a widespread ability among boreal forest plants. Ecology letters 4, 434-438. Paper V. Persson, J., Högberg, P., Ekblad, A., Högberg, M.N., Nordgren, A. & Näsholm, T. XXXX. Nitrogen acquisition from inorganic and organic sources by boreal forest plants in the field. Submitted.
Place of Publication:Umeå
ISBN for printed version:91-576-6349-1
ISSN:1401-6230
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F61 Plant physiology - Nutrition
Subjects:Not in use, please see Agris categories
Agrovoc terms:boreal forests, organic nitrogen compounds, nutrient uptake, amino acids, mycorrhizae, pinus, nitrogen cycle, plant physiology
Keywords:Organic N, amino acid, uptake, nitrogen, boreal forest, regulation, plant, Pinus
URN:NBN:urn:nbn:se:slu:epsilon-170
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-170
ID Code:220
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: Staff Epsilon
Deposited On:04 Apr 2003 00:00
Metadata Last Modified:02 Dec 2014 10:02

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