Auxin-modulated root growth inhibition in Arabidopsis thaliana seedlings with ammonium as the sole nitrogen source

H. Yang, J. Von Der Fecht Bartenbach, J. Friml, J. Lohmann, B. Neuhäuser, U. Ludewig, Functional Plant Biology 42 (2014) 239–251.

Download
No fulltext has been uploaded. References only!

Journal Article | Published | English
Author
; ; ; ; ;
Department
Abstract
Ammonium is the major nitrogen source in some plant ecosystems but is toxic at high concentrations, especially when available as the exclusive nitrogen source. Ammonium stress rapidly leads to various metabolic and hormonal imbalances that ultimately inhibit root and shoot growth in many plant species, including Arabidopsis thaliana (L.) Heynh. To identify molecular and genetic factors involved in seedling survival with prolonged exclusive NH4+ nutrition, a transcriptomic analysis with microarrays was used. Substantial transcriptional differences were most pronounced in (NH4)2SO4-grown seedlings, compared with plants grown on KNO3 or NH4NO3. Consistent with previous physiological analyses, major differences in the expression modules of photosynthesis-related genes, an altered mitochondrial metabolism, differential expression of the primary NH4+ assimilation, alteration of transporter gene expression and crucial changes in cell wall biosynthesis were found. A major difference in plant hormone responses, particularly of auxin but not cytokinin, was striking. The activity of the DR5::GUS reporter revealed a dramatically decreased auxin response in (NH4)2SO4-grown primary roots. The impaired root growth on (NH4)2SO4 was partially rescued by exogenous auxin or in specific mutants in the auxin pathway. The data suggest that NH4+-induced nutritional and metabolic imbalances can be partially overcome by elevated auxin levels.
Publishing Year
Date Published
2014-10-24
Journal Title
Functional Plant Biology
Volume
42
Issue
3
Page
239 - 251
IST-REx-ID

Cite this

Yang H, Von Der Fecht Bartenbach J, Friml J, Lohmann J, Neuhäuser B, Ludewig U. Auxin-modulated root growth inhibition in Arabidopsis thaliana seedlings with ammonium as the sole nitrogen source. Functional Plant Biology. 2014;42(3):239-251. doi:10.1071/FP14171
Yang, H., Von Der Fecht Bartenbach, J., Friml, J., Lohmann, J., Neuhäuser, B., & Ludewig, U. (2014). Auxin-modulated root growth inhibition in Arabidopsis thaliana seedlings with ammonium as the sole nitrogen source. Functional Plant Biology, 42(3), 239–251. https://doi.org/10.1071/FP14171
Yang, Huaiyu, Jenny Von Der Fecht Bartenbach, Jirí Friml, Jan Lohmann, Benjamin Neuhäuser, and Uwe Ludewig. “Auxin-Modulated Root Growth Inhibition in Arabidopsis Thaliana Seedlings with Ammonium as the Sole Nitrogen Source.” Functional Plant Biology 42, no. 3 (2014): 239–51. https://doi.org/10.1071/FP14171.
H. Yang, J. Von Der Fecht Bartenbach, J. Friml, J. Lohmann, B. Neuhäuser, and U. Ludewig, “Auxin-modulated root growth inhibition in Arabidopsis thaliana seedlings with ammonium as the sole nitrogen source,” Functional Plant Biology, vol. 42, no. 3, pp. 239–251, 2014.
Yang H, Von Der Fecht Bartenbach J, Friml J, Lohmann J, Neuhäuser B, Ludewig U. 2014. Auxin-modulated root growth inhibition in Arabidopsis thaliana seedlings with ammonium as the sole nitrogen source. Functional Plant Biology. 42(3), 239–251.
Yang, Huaiyu, et al. “Auxin-Modulated Root Growth Inhibition in Arabidopsis Thaliana Seedlings with Ammonium as the Sole Nitrogen Source.” Functional Plant Biology, vol. 42, no. 3, CSIRO, 2014, pp. 239–51, doi:10.1071/FP14171.

Export

Marked Publications

Open Data IST Research Explorer

Search this title in

Google Scholar