Effect of nitrogen nutrition on photosynthesis and growth in C4 Panicum species

Autor:	W. D. Bowman Epo
Rok vydání:	1991
Předmět:	chemistry.chemical_classification Physiology fungi food and beverages chemistry.chemical_element Assimilation (biology) Plant Science Biology Photosynthesis biology.organism_classification Nitrogen Enzyme chemistry Shoot Botany C4 photosynthesis Panicum
Zdroj:	Plant, Cell and Environment. 14:295-301
ISSN:	1365-3040 0140-7791
DOI:	10.1111/j.1365-3040.1991.tb01504.x
Popis:	The growth and photosynthetic responses to high and low N nutrition were measured in 2 NADP-malic enzyme and 4 NAD-malic enzyme C4 subtype Panicum species to evaluate whether differences in C4 photosynthetic biochemistry result in differences in the N requirement for growth. All species had lower biomass production, photosynthesis rates, and shoot N concentrations at low N, and no consistent differences between the C4 subtypes were apparent. The assimilation rates (biomass accumulated over the period of growth) for the NADP-malic enzyme species were higher than the NAD-malic enzyme species at high N but not at low N. When assimilation rates were evaluated on a shoot N basis a higher N-use-efficiency was found for the NADP-malic enzyme species at high N. Thus the NADP-malic enzyme Panicum species had a greater amount of growth for a given shoot N concentration, but only above a certain level of shoot N concentrations.
Databáze:	OpenAIRE
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