Skip to main content
NCBI home page
Plant Physiology logoLink to Plant Physiology
. 1971 Mar;47(3):357–360. doi: 10.1104/pp.47.3.357

Absorption of Magnesium and Chloride by Excised Corn Root

E V Maas 1, Gen Ogata 1
PMCID: PMC365869  PMID: 16657622

Abstract

Absorption characteristics of Mg2+ and Cl− were investigated with 5-day-old excised corn (Zea mays) roots. Uptake from both 0.5 and 10 milliequivalents per liter MgCl2 solutions occurred at steady state rates for the first 6 hours. Inhibition by dinitrophenol and low temperatures established that absorption during this period was metabolically mediated in the absence and presence of Ca2+. Absorption isotherms indicated dual mechanisms of Mg2+ and Cl− absorption from solutions above 1 milliequivalent per liter. The effect of H+ on absorption of Mg2+ and Cl− was typical of that generally reported for other plant roots and other ions. In the physiological pH range, Ca2+ greatly suppressed the rate of Mg2+ absorption but had little effect on Cl−. The influence of Ca2+ on Mg2+ appeared to be noncompetitive and independent of its effect on membrane permeability.

Full text

PDF
357

Selected References

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

  1. COTLOVE E., TRANTHAM H. V., BOWMAN R. L. An instrument and method for automatic, rapid, accurate, and sensitive titration of chloride in biologic samples. J Lab Clin Med. 1958 Mar;51(3):461–468. [PubMed] [Google Scholar]
  2. Elzam O. E., Epstein E. Absorption of Chloride by Barley Roots: Kinetics and Selectivity. Plant Physiol. 1965 Jul;40(4):620–624. doi: 10.1104/pp.40.4.620. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Handley R., Overstreet R. Uptake of calcium & chlorine in roots of Zea mays. Plant Physiol. 1961 Nov;36(6):766–769. doi: 10.1104/pp.36.6.766. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Jacobson L., Moore D. P., Hannapel R. J. Role of Calcium in Absorption of Monovalent Cations. Plant Physiol. 1960 May;35(3):352–358. doi: 10.1104/pp.35.3.352. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Leggett J. E., Gilbert W. A. Localization of the ca-mediated apparent ion selectivity in the cross sectional volume of soybean roots. Plant Physiol. 1967 Dec;42(12):1658–1664. doi: 10.1104/pp.42.12.1658. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Leggett J. E., Gilbert W. A. Magnesium uptake by soybeans. Plant Physiol. 1969 Aug;44(8):1182–1186. doi: 10.1104/pp.44.8.1182. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Läuchli A., Epstein E. Transport of potassium and rubidium in plant roots: the significance of calcium. Plant Physiol. 1970 May;45(5):639–641. doi: 10.1104/pp.45.5.639. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Maas E. V. Calcium uptake by excised maize roots and interactions with alkali cations. Plant Physiol. 1969 Jul;44(7):985–989. doi: 10.1104/pp.44.7.985. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Maas E. V., Leggett J. E. Uptake of rb and k by excised maize roots. Plant Physiol. 1968 Dec;43(12):2054–2056. doi: 10.1104/pp.43.12.2054. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Maas E. V., Moore D. P., Mason B. J. Influence of calcium and magnesium on manganese absorption. Plant Physiol. 1969 Jun;44(6):796–800. doi: 10.1104/pp.44.6.796. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Maas E. V., Moore D. P., Mason B. J. Manganese absorption by excised barley roots. Plant Physiol. 1968 Apr;43(4):527–530. doi: 10.1104/pp.43.4.527. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Moore D. P., Jacobson L., Overstreet R. Uptake of calcium by excised barley roots. Plant Physiol. 1961 Jan;36(1):53–57. doi: 10.1104/pp.36.1.53. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Moore D. P., Overstreet R., Jacobson L. Uptake of magnesium & its interaction with calcium in excised barley roots. Plant Physiol. 1961 May;36(3):290–295. doi: 10.1104/pp.36.3.290. [DOI] [PMC free article] [PubMed] [Google Scholar]

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

RESOURCES