Skip to main content
PMC home page
Plant Physiology logoLink to Plant Physiology
. 1997 Feb;113(2):527–534. doi: 10.1104/pp.113.2.527

Al Partitioning Patterns and Root Growth as Related to Al Sensitivity and Al Tolerance in Wheat.

T D Samuels 1, K Kucukakyuz 1, M Rincon-Zachary 1
PMCID: PMC158169  PMID: 12223623

Abstract

Studies of Al partitioning and accumulation and of the effect of Al on the growth of intact wheat (Triticum aestivum L.) roots of cultivars that show differential Al sensitivity were conducted. The effects of various Al concentrations on root growth and Al accumulation in the tissue were followed for 24 h. At low external Al concentrations, Al accumulation in the root tips was low and root growth was either unaffected or stimulated. Calculations based on regression analysis of growth and Al accumulation in the root tips predicted that 50% root growth inhibition in the Al-tolerant cv Atlas 66 would be attained when the Al concentrations were 105 [mu]M in the nutrient solution and 376.7 [mu]g Al g-1 dry weight in the tissue. In contrast, in the Al-sensitive cv Tam 105, 50% root growth inhibition would be attained when the Al concentrations were 11 [mu]M in the nutrient solution and 546.2 [mu]g Al g-1 dry weight in the tissue. The data support the hypotheses that differential Al sensitivity correlates with differential Al accumulation in the growing root tissue, and that mechanisms of Al tolerance may be based on strategies to exclude Al from the root meristems.

Full Text

The Full Text of this article is available as a PDF (765.2 KB).

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Delhaize E., Craig S., Beaton C. D., Bennet R. J., Jagadish V. C., Randall P. J. Aluminum Tolerance in Wheat (Triticum aestivum L.) (I. Uptake and Distribution of Aluminum in Root Apices). Plant Physiol. 1993 Nov;103(3):685–693. doi: 10.1104/pp.103.3.685. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Delhaize E., Ryan P. R., Randall P. J. Aluminum Tolerance in Wheat (Triticum aestivum L.) (II. Aluminum-Stimulated Excretion of Malic Acid from Root Apices). Plant Physiol. 1993 Nov;103(3):695–702. doi: 10.1104/pp.103.3.695. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Huang Z. Z., Yan X., Jalil A., Norlyn J. D., Epstein E. Short-term experiments on ion transport by seedlings and excised roots : technique and validity. Plant Physiol. 1992 Dec;100(4):1914–1920. doi: 10.1104/pp.100.4.1914. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Lazof D. B., Goldsmith J. G., Rufty T. W., Linton R. W. Rapid Uptake of Aluminum into Cells of Intact Soybean Root Tips (A Microanalytical Study Using Secondary Ion Mass Spectrometry). Plant Physiol. 1994 Nov;106(3):1107–1114. doi: 10.1104/pp.106.3.1107. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Miyasaka S. C., Buta J. G., Howell R. K., Foy C. D. Mechanism of aluminum tolerance in snapbeans : root exudation of citric Acid. Plant Physiol. 1991 Jul;96(3):737–743. doi: 10.1104/pp.96.3.737. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Miyasaka S. C., Kochian L. V., Shaff J. E., Foy C. D. Mechanisms of Aluminum Tolerance in Wheat : An Investigation of Genotypic Differences in Rhizosphere pH, K, and H Transport, and Root-Cell Membrane Potentials. Plant Physiol. 1989 Nov;91(3):1188–1196. doi: 10.1104/pp.91.3.1188. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Nichol B. E., Oliveira L. A., Glass ADM., Siddiqi M. Y. The Effects of Aluminum on the Influx of Calcium, Potassium, Ammonium, Nitrate, and Phosphate in an Aluminum-Sensitive Cultivar of Barley (Hordeum vulgare L.). Plant Physiol. 1993 Apr;101(4):1263–1266. doi: 10.1104/pp.101.4.1263. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Pellet D. M., Papernik L. A., Kochian L. V. Multiple Aluminum-Resistance Mechanisms in Wheat (Roles of Root Apical Phosphate and Malate Exudation). Plant Physiol. 1996 Oct;112(2):591–597. doi: 10.1104/pp.112.2.591. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Rincón M., Gonzales R. A. Aluminum Partitioning in Intact Roots of Aluminum-Tolerant and Aluminum-Sensitive Wheat (Triticum aestivum L.) Cultivars. Plant Physiol. 1992 Jul;99(3):1021–1028. doi: 10.1104/pp.99.3.1021. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Tice K. R., Parker D. R., Demason D. A. Operationally defined apoplastic and symplastic aluminum fractions in root tips of aluminum-intoxicated wheat. Plant Physiol. 1992 Sep;100(1):309–318. doi: 10.1104/pp.100.1.309. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Zhang G., Taylor G. J. Kinetics of Aluminum Uptake by Excised Roots of Aluminum-Tolerant and Aluminum-Sensitive Cultivars of Triticum aestivum L. Plant Physiol. 1989 Nov;91(3):1094–1099. doi: 10.1104/pp.91.3.1094. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Zhang G., Taylor G. J. Kinetics of Aluminum Uptake in Triticum aestivum L: Identity of the Linear Phase of Aluminum Uptake by Excised Roots of Aluminum-Tolerant and Aluminum-Sensitive Cultivars. Plant Physiol. 1990 Oct;94(2):577–584. doi: 10.1104/pp.94.2.577. [DOI] [PMC free article] [PubMed] [Google Scholar]

Articles from Plant Physiology are provided here courtesy of Oxford University Press

RESOURCES