Plant Physiology Preview
Published on May 8, 2008; 10.1104/pp.108.118562
OPEN ACCESS ARTICLE
Received March 1, 2008
Accepted April 23, 2008
The Effect of Iron on the Primary Root Elongation of Arabidopsis during Phosphate Deficiency
James T. Ward , Brett Lahner , Elena Yakubova , David E. Salt , and Kashchandra G. Raghothama *
Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana 47907-1165
* Corresponding author; email: kraghoth{at}purdue.edu.
Root architectures differences have been linked to the survival of plants on phosphate-deficient soils, as well as to the improved yields of phosphate-efficient crop cultivars. To understand how these differences arise, we have studied the root architectures of phosphate-deficient Arabidopsis thaliana (Col-0) plants. A striking aspect of the root architecture of these plants is that their primary root elongation is inhibited when grown on phosphate-deficient media. Here we present evidence suggesting that this inhibition is a result of iron toxicity. When the iron concentration in phosphate-deficient medium is reduced, we observe elongation of the primary root without an increase in phosphate availability or a corresponding change in the expression of phosphate-deficiency regulated genes. Recovery of the primary root elongation is associated with larger plant weights, improved ability to take up phosphate from the media, and increased tissue phosphate content. This suggests that manipulating iron availability to a plant could be a valuable strategy for improving a plant's ability to tolerate phosphate deficiency.
This article has been cited by other articles:
|
|
|
|
 
W.-F. Li, P. J. Perry, N. N. Prafulla, and W. Schmidt
Ubiquitin-Specific Protease 14 (UBP14) Is Involved in Root Responses to Phosphate Deficiency in Arabidopsis
Mol Plant,
November 10, 2009;
(2009)
ssp086v1.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
L. Zheng, F. Huang, R. Narsai, J. Wu, E. Giraud, F. He, L. Cheng, F. Wang, P. Wu, J. Whelan, et al.
Physiological and Transcriptome Analysis of Iron and Phosphorus Interaction in Rice Seedlings
Plant Physiology,
September 1, 2009;
151(1):
262 - 274.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
C. A. Ticconi, R. D. Lucero, S. Sakhonwasee, A. W. Adamson, A. Creff, L. Nussaume, T. Desnos, and S. Abel
ER-resident proteins PDR2 and LPR1 mediate the developmental response of root meristems to phosphate availability
PNAS,
August 18, 2009;
106(33):
14174 - 14179.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A. Jain, M. D. Poling, A. P. Smith, V. K. Nagarajan, B. Lahner, R. B. Meagher, and K. G. Raghothama
Variations in the Composition of Gelling Agents Affect Morphophysiological and Molecular Responses to Deficiencies of Phosphate and Other Nutrients
Plant Physiology,
June 1, 2009;
150(2):
1033 - 1049.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
C.-A. Perez-Torres, J. Lopez-Bucio, A. Cruz-Ramirez, E. Ibarra-Laclette, S. Dharmasiri, M. Estelle, and L. Herrera-Estrella
Phosphate Availability Alters Lateral Root Development in Arabidopsis by Modulating Auxin Sensitivity via a Mechanism Involving the TIR1 Auxin Receptor
PLANT CELL,
December 1, 2008;
20(12):
3258 - 3272.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
I. R. Baxter, O. Vitek, B. Lahner, B. Muthukumar, M. Borghi, J. Morrissey, M. L. Guerinot, and D. E. Salt
The leaf ionome as a multivariable system to detect a plant's physiological status
PNAS,
August 19, 2008;
105(33):
12081 - 12086.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
