Plant Soil Environ., 2012, 58(8):367-372 | DOI: 10.17221/367/2012-PSE

Interactions between nitrogen nutrition and phytohormone levels in Festulolium plants

D. Pavlíková1, M. Neuberg1, E. Žižková2, V. Motyka2, M. Pavlík2
1 Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
2 Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Prague, Czech Republic

This study aims to reveal and to compare effect of two various systems of nitrogen nutrition, namely injection and sidedress application, on the levels of NO3- and phytohormones (cytokinins, abscisic acid (ABA), indole-3-acetic acid (IAA)) in Festulolium plants. Calcium nitrate (CN) or ammonium sulphate (AS) were used as N source in the pot experiment. The yield of Festulolium above and below ground biomass was more substantially enhanced after sidedress application of both AS or CN in comparison with injection application. The levels of endogenous cytokinins peaked 5 days after application regardless the form of N source and the method of application. The increased concentration of endogenous cytokinins as well as the enhanced content of selected free amino acid suggest that N applied sidedress can maintain better distribution patterns of nutrients and provide improved conditions for growth and nitrogen uptake. The nitrogen application affected ABA concentrations on all tested treatments. The correlation between NO3- and ABA concentrations ranged from 0.77 to 0.89. A significant IAA increase was recorded in plants after ammonium nitrogen sidedress application and it was confirmed that applications of nitrate reduced IAA concentration (correlation between NO3- and IAA for AS treatment R2 = 0.77-0.94).

Keywords: abscisic acid; amino acid; CULTAN; cytokinin; indole-3-acetic acid; Poaceae

Published: August 31, 2012  Show citation

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Pavlíková D, Neuberg M, Žižková E, Motyka V, Pavlík M. Interactions between nitrogen nutrition and phytohormone levels in Festulolium plants. Plant Soil Environ. 2012;58(8):367-372. doi: 10.17221/367/2012-PSE.
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