Plant and Soil

, Volume 70, Issue 3, pp 317–326

Manganese and iron interactions on their uptake and distribution in soybean (Glycine max (L.) Merr.)

  • D. P. Heenan
  • L. C. Campbell
Article

DOI: 10.1007/BF02374888

Cite this article as:
Heenan, D.P. & Campbell, L.C. Plant Soil (1983) 70: 317. doi:10.1007/BF02374888

Summary

The uptake and distribution of iron and manganese were studied in a manganese-sensitive soybean cultivar (‘Bragg’) grown over a range of supply levels of these nutrients in solution culture. At high (90 and 275 μM) manganese levels, increasing the iron concentration in solution from 2 to 100 μM partially overcame the effects of manganese toxicity. Interactions between manganese and iron occurred for dry matter yields, rate of Mn absorption by the roots, and the proportions of manganese and iron transported to the tops. No interaction was observed for the rate of root absorption of iron.

The percentage distribution of manganese in the plant top increased with increasing iron, despite a reduced rate of Mn uptake. On the other hand, iron uptake was independent of solution Mn concentration and increased with increasing solution Fe. Also more iron was retained in the roots at high Mn and/or Fe levels in solution.

Concentrations of manganese and iron in roots, stems and individual leaves were affected independently by the manganese and iron supplyi.e. without any interaction occurring between the two elements. In general, the concentration in a plant part was related directly to the solution concentration. Symptoms resembling iron deficiency correlated poorly with leaf Fe concentrations whereas high levels of manganese were found in leaves displaying Mn toxicity symptoms.

Key words

Glycine max (L.) Merr. Iron Manganese Soybean 

Copyright information

© Martinus Nijhoff/Dr W. Junk Publishers 1983

Authors and Affiliations

  • D. P. Heenan
    • 1
  • L. C. Campbell
    • 1
  1. 1.Department of Agronomy and Horticultural ScienceUniversity of SydneyAustralia
  2. 2.Agricultural Research CentreYancoAustralia

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