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Title: A systems biology approach identifies new regulators of poplar root development under low nitrogen

Journal Article · · The Plant Journal
DOI:https://doi.org/10.1111/tpj.13002· OSTI ID:1401156
 [1];  [2];  [1];  [1];  [1];  [1]
  1. Forest Resources and Environmental Science Michigan Technological University Houghton MI 49931 USA
  2. Department of Biological Sciences Eastern Illinois University Charleston IL 61920 USA

Summary In Populus , low nitrogen ( LN ) elicits rapid and vigorous lateral root ( LR ) proliferation, which is closely mirrored by corresponding transcriptomic changes. Using transcriptomic data, we built a genetic network encompassing a large proportion of the differentially regulated transcriptome. The network is organized in a hierarchical fashion, centered on 11 genes. Transgenic manipulations of only three of the 11 genes had a strong impact on root development under LN . These three genes encoded an F‐box protein similar to Hawaiian Skirt ( Pta HWS ) and two transcription factors ( Pta RAP 2.11 and Pta NAC 1 ). Up‐ and downregulation of the three genes caused increased and decreased root proliferation under LN conditions, respectively. The transgenic manipulations had a strong positive effect on growth under greenhouse conditions including increased shoot and root biomass. The three genes appeared to encompass a putative yet‐unknown mechanism that underlies root development under LN . Specifically, the genes are predominantly expressed in roots and have a similar temporal response to LN . More importantly, transgenic manipulation for each of the three genes had a highly significant impact on the expression of the other two. The transgenic manipulations appear to also affect the expression of the regulatory mi RNA ( Ptami RNA 164e ) of one of the transcription factors ( Pta NAC 1 ), albeit in an opposite fashion. Consistent with a putative function of Pta HWS in proteasome degradation, treatment with proteasome inhibitor reversed the expression changes in the transgenic plants. The insights from this study will allow genetic modifications of root architecture for more efficient and dynamic nitrogen foraging in biofuel crops like poplar.

Sponsoring Organization:
USDOE
OSTI ID:
1401156
Journal Information:
The Plant Journal, Journal Name: The Plant Journal Vol. 84 Journal Issue: 2; ISSN 0960-7412
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

References (58)

A DNA Transformation–Competent Arabidopsis Genomic Library in Agrobacterium journal October 1991
Manipulation of microRNA expression to improve nitrogen use efficiency journal September 2013
Mutants of Arabidopsis thaliana with pleiotropic effects on the expression of the gene for beta-amylase and on the accumulation of anthocyanin that are inducible by sugars journal April 1997
The nodule inception-like protein 7 modulates nitrate sensing and metabolism in Arabidopsis journal February 2009
Activation Tagging of a Dominant Gibberellin Catabolism Gene ( GA 2-oxidase ) from Poplar That Regulates Tree Stature journal June 2003
Nutritional regulation of ANR1 and other root-expressed MADS-box genes in Arabidopsis thaliana journal July 2005
Expression and Interaction Analysis of Arabidopsis Skp1-Related Genes journal January 2004
HAWAIIAN SKIRT : An F-Box Gene That Regulates Organ Fusion and Growth in Arabidopsis journal May 2007
MicroRNA regulation of the CUC genes is required for boundary size control in Arabidopsis meristems journal September 2004
Functions of microRNAs in plant stress responses journal April 2012
Flavonoids as antioxidants in plants: Location and functional significance journal November 2012
Systems approach identifies TGA1 and TGA4 transcription factors as important regulatory components of the nitrate response of Arabidopsis thaliana roots journal August 2014
Enhancer trapping in woody plants: Isolation of the ET304 gene encoding a putative AT-hook motif transcription factor and characterization of the expression patterns conferred by its promoter in transgenic Populus and Arabidopsis journal August 2006
GATEWAY™ vectors for Agrobacterium-mediated plant transformation journal May 2002
Involvement of miR169 in the nitrogen-starvation responses in Arabidopsis journal February 2011
Mechanisms and function of substrate recruitment by F-box proteins journal May 2013
Nitrate transporters and peptide transporters journal April 2007
Understanding plant response to nitrogen limitation for the improvement of crop nitrogen use efficiency journal October 2010
Adaptation of Arabidopsis to nitrogen limitation involves induction of anthocyanin synthesis which is controlled by the NLA gene journal June 2008
The SCF Ubiquitin Ligase journal May 2002
Gene expression, localization, and protein–protein interaction of Arabidopsis SKP1-like (ASK) 20A and 20B journal May 2008
F-Box Proteins Are Receptors that Recruit Phosphorylated Substrates to the SCF Ubiquitin-Ligase Complex journal October 1997
Members of the LBD Family of Transcription Factors Repress Anthocyanin Synthesis and Affect Additional Nitrogen Responses in Arabidopsis journal November 2009
The Arabidopsis NRT1.1 transporter participates in the signaling pathway triggering root colonization of nitrate-rich patches journal December 2006
NIH Image to ImageJ: 25 years of image analysis journal June 2012
Nitrate-responsive miR393/AFB3 regulatory module controls root system architecture in Arabidopsis thaliana journal February 2010
An Agrobacterium tumefaciens transformation protocol effective on a variety of cottonwood hybrids (genus Populus) journal January 2000
A new mathematical model for relative quantification in real-time RT-PCR journal May 2001
Genetic Regulation by NLA and MicroRNA827 for Maintaining Nitrate-Dependent Phosphate Homeostasis in Arabidopsis journal March 2011
Flavonoids Act as Negative Regulators of Auxin Transport in Vivo in Arabidopsis journal June 2001
Nitrogen-use efficiency in maize (Zea mays L.): from 'omics' studies to metabolic modelling journal May 2014
Systems approaches map regulatory networks downstream of the auxin receptor AFB3 in the nitrate response of Arabidopsis thaliana roots journal July 2013
Transcriptome response to nitrogen starvation in rice journal August 2012
NITROGEN LIMITATION ADAPTATION, a Target of MicroRNA827, Mediates Degradation of Plasma Membrane–Localized Phosphate Transporters to Maintain Phosphate Homeostasis in Arabidopsis journal October 2013
Learning Bayesian Networks with the bnlearn R Package journal January 2010
ARACNE: An Algorithm for the Reconstruction of Gene Regulatory Networks in a Mammalian Cellular Context journal March 2006
A mutation in NLA, which encodes a RING-type ubiquitin ligase, disrupts the adaptability of Arabidopsis to nitrogen limitation: NLA required for adaptability to nitrogen limitation journal March 2007
MicroRNA Regulation of NAC-Domain Targets Is Required for Proper Formation and Separation of Adjacent Embryonic, Vegetative, and Floral Organs journal June 2004
Uptake, allocation and signaling of nitrate journal August 2012
Cloning and Characterization of Maize miRNAs Involved in Responses to Nitrogen Deficiency journal January 2012
Lateral root development in Arabidopsis: fifty shades of auxin journal August 2013
Gene Expression Biomarkers Provide Sensitive Indicators of in Planta Nitrogen Status in Maize journal October 2011
Nitrogen deprivation promotes Populus root growth through global transcriptome reprogramming and activation of hierarchical genetic networks journal June 2013
Plant Nitrogen Assimilation and Use Efficiency journal June 2012
The Arabidopsis AP2/ERF Transcription Factor RAP2.11 Modulates Plant Response to Low-Potassium Conditions journal September 2012
Nitrogen use efficiency of rice reconsidered: What are the key constraints? journal October 1993
Flavonoids and auxin transport: modulators or regulators? journal December 2007
Members of the LATERAL ORGAN BOUNDARIES DOMAIN Transcription Factor Family Are Involved in the Regulation of Secondary Growth in Populus journal November 2010
Signalling mechanisms underlying the morphological responses of the root system to nitrogen in Arabidopsis thaliana journal March 2007
Estimation of total phenols and flavonoids in extracts of actaea spicata roots and antioxidant activity studies journal January 2011
Plant hormones and nutrient signaling journal August 2008
Genome-Wide Identification of MicroRNAs in Response to Low Nitrate Availability in Maize Leaves and Roots journal November 2011
An Arabidopsis MADS Box Gene That Controls Nutrient-Induced Changes in Root Architecture journal January 1998
Systems analysis of transcriptome data provides new hypotheses about Arabidopsis root response to nitrate treatments journal January 2014
MicroRNA Directs mRNA Cleavage of the Transcription Factor NAC1 to Downregulate Auxin Signals for Arabidopsis Lateral Root Development journal April 2005
Genome-wide characterization of new and drought stress responsive microRNAs in Populus euphratica journal April 2011
Regulation of Flower Development in Arabidopsis by SCF Complexes journal March 2004
Auxin biosynthetic gene TAR2 is involved in low nitrogen-mediated reprogramming of root architecture in Arabidopsis journal March 2014