Interactions between nitrogen nutrition and phytohormone levels in Festulolium plants

Abstract

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 NO 3 -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 NO 3 -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 NO 3 -and IAA for AS treatment R 2 = 0.77-0.94).

Nitrogen fertility and abiotic stresses management in cotton crop: a review

“…N is needed to establish leaf canopy growth for light interception and utilization and photosynthesis . Hence, crops depend on N supply for both physiological and morphological response and to manipulate their growth and development (Pavlíková et al 2012). Therefore, all cropping systems need N to complete their life cycle .…”

Effect of Different Combinations of Phosphorus and Nitrogen Fertilization on Arbuscular Mycorrhizal Fungi and Aphids in Wheat

“…Many studies have claimed that N is an essential element involved in the biosynthesis of chlorophyll [31], nucleic acids [32], amino acids [33], and enzymes [34], which are associated with the accumulation of plant nutrients [35,36]. In addition, N is the key factor for the metabolism of plant secondary chemicals, such as phytohormones (e.g., abscisic acid, ABA; indole-3-acetic acid, IAA; cytokinin, CK) [37,38], polyphenolics, tannins, and flavonoids [39][40][41][42]. For example, total phenolics and total flavonoids increased with an increase in nitrogen fertilizer application [43,44].…”

Transcriptome and metabolite analysis identifies nitrogen utilization genes in tea plant (Camellia sinensis)

“…AQP has been found to involve in water transportation by upregulating its gene expression in supplied N source in poplar 16 , rice 17 and barley 7 . N uptake is also associated with phytohormones such as cytokinins, abscisic acid and auxin 18 , or transcription factors osDOF18 in rice 19 .…”