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Titolo:
The interaction between elevated carbon dioxide and nitrogen nutrition: the physiological and molecular background
Autore:
Stitt, M; Krapp, A;
Indirizzi:
Inst Bot, D-69120 Heidelberg, Germany Inst Bot Heidelberg Germany D-69120 nst Bot, D-69120 Heidelberg, Germany
Titolo Testata:
PLANT CELL AND ENVIRONMENT
fascicolo: 6, volume: 22, anno: 1999,
pagine: 583 - 621
SICI:
0140-7791(199906)22:6<583:TIBECD>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
NITRATE REDUCTASE-ACTIVITY; RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE-OXYGENASE; ATMOSPHERIC CO2 ENRICHMENT; CALVIN-CYCLE ENZYMES; ADP-GLUCOSE PYROPHOSPHORYLASE; DEPENDENT GLUTAMATE SYNTHASE; SUCROSE-PHOSPHATE SYNTHASE; TRANSGENIC TOBACCO PLANTS; ARABIDOPSIS-THALIANA L; PHASEOLUS-VULGARIS L;
Keywords:
elevated carbon dioxide; nitrate; nitrogen; nitrogen signalling; photosynthesis; Rubisco; starch; sugar signalling;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
370
Recensione:
Indirizzi per estratti:
Indirizzo: Stitt, M Inst Bot, Neuenheimer Feld 360, D-69120 Heidelberg, Germany Inst Bot Neuenheimer Feld 360 Heidelberg Germany D-69120 Germany
Citazione:
M. Stitt e A. Krapp, "The interaction between elevated carbon dioxide and nitrogen nutrition: the physiological and molecular background", PL CELL ENV, 22(6), 1999, pp. 583-621

Abstract

This review first summarizes the numerous studies that have described the interaction between the nitrogen supply and the response of photosynthesis,metabolism and growth to elevated [CO2]. The initial stimulation of photosynthesis in elevated [CO2] is often followed by a decline of photosynthesis, that is typically accompanied by a decrease of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), an accumulation of carbohydrate especiallystarch, and a decrease of the nitrogen concentration in the plant. These changes are particularly marked when the nitrogen supply is low, whereas when the nitrogen supply is adequate there is no acclimation of photosynthesis, no major decrease in the internal concentration of nitrogen or the levelsof nitrogen metabolites, and growth is stimulated markedly. Second, emerging evidence is discussed that signals derived from nitrate and nitrogen metabolites such as glutamine act to regulate the expression of genes involvedin nitrate and ammonium uptake and assimilation? organic acid synthesis and starch accumulation, to modulate the sugar-mediated repression of the expression of genes involved in photosynthesis, and to modulate whole plant events including shoot-root allocation, root architecture and flowering. Third, increased rates of growth in elevated [CO2] will require higher rates ofinorganic nitrogen uptake and assimilation. Recent evidence is discussed that an increased supply of sugars can increase the rates of nitrate and ammonium uptake and assimilation, the synthesis of organic acid accepters, andthe synthesis of amino acids. Fourth, interpretation of experiments in elevated [CO2] requires that the nitrogen status of the plants is monitored, The suitability of different criteria to assess the plant nitrogen status iscritically discussed. Finally the review returns to experiments with elevated [CO2] and discusses the following topics: is, and if so how, are nitrate and ammonium uptake and metabolism stimulated in elevated [CO2], and doesthe result depend on the nitrogen supply? Is acclimation of photosynthesisthe result of sugar-mediated repression of gene expression, end-product feedback of photosynthesis, nitrogen-induced senescence, or ontogenetic drift? Is the accumulation of starch a passive response to increased carbohydrate formation, or is it triggered by changes in the nutrient status? How do changes in sugar production and inorganic nitrogen assimilation interact in different conditions and at different stages of the life history to determine the response of whole plant growth and allocation to elevated [CO2]?

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 22:08:17