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Root uptake coefficients for absorption of CaEDTA and Ca++ by tomato plants

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Summary

The rate of absorption of Ca++ and CaEDTA by tomatoes (Lycopersicon esculentum) from solutions containing these species was determined for a one-day absorption period. The Ca/Sr ratio of uptake of Ca and Sr was used to separate Ca uptake into that coming from Ca++ and CaEDTA. The root absorption coefficient of each species decreased as Ca concentration in solution was increased from 20 to 200 μm. The root absorption coefficient for Ca++ was approximately four times that for CaEDTA. At a Ca concentration of 100 μm the root uptake coefficients were approximately 2.0 × 10-5 and 8.0 × 10-5 cm sec-1 for CaEDTA and Ca++, respectively.

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References

  1. Elgawhary, S. M., Malzer, G. L., and Barber, S. A., Calcium and Strontium Transport to Plant Roots. Soil Sci. Soc. Am. Proc. 36, 794–799 (1972).

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  2. Elgawhary, S. M. and Barber, S. A., Measurement of uptake of chelated and unchelated Ca and Sr from solution culture. Plant and Soil 39, 581–590 (1973).

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Author notes

  1. S. M. Elgawhary

    Present address: Alabama A & M University, 35762, Huntsville, Alabama

Authors and Affiliations

  1. Agronomy Department, Purdue University, Lafayette, Indiana, U.S.A.

    S. M. Elgawhary & S. A. Barber

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  1. S. M. Elgawhary
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  2. S. A. Barber
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Additional information

Journal Paper No. 4968. Purdue University Agricultural Experiment Station, Lafayette, Indiana 47907. Contribution from the Department of Agronomy. This research was supported in part by the U.S. Atomic Energy Commission under Contract AT (11-1)-1495.

Journal Paper No. 4968. Purdue University Agricultural Experiment Station, Lafayette, Indiana 47907. Contribution from the Department of Agronomy. This research was supported in part by the U.S. Atomic Energy Commission under Contract AT (11-1)-1495.

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Elgawhary, S.M., Barber, S.A. Root uptake coefficients for absorption of CaEDTA and Ca++ by tomato plants. Plant Soil 40, 183–191 (1974). https://doi.org/10.1007/BF00011421

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  • DOI: https://doi.org/10.1007/BF00011421

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