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This article in AJ

  1. Vol. 72 No. 5, p. 854-855
     
    Received: July 20, 1979


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doi:10.2134/agronj1980.00021962007200050037x

Absorption and Translocation of Chromium through the Surface of a Soybean Leaf1

  1. D. J. Pickrell and
  2. B. G. Ellis2

Abstract

Abstract

Although Cr is known to be important in animal metabolism, it does not readily translocate through the roots of most plants. The addition of Cr to plant leaves as a spray material is a possible method of increasing the Cr content of plants. The objective of this laboratory study was to determine if Cr would be absorbed by a plant leaf and translocated to other portions of the plant. A single drop containing radioactive 51Cr or 59Fe (for comparison) as ethylenediamine tetraacetic acid (EDTA) was placed over the mid-rib of one leaf on a soybean [Glycine max (L.) Merr.] plant. Absorption and translocation of the tagged Cr or Fe were followed by radioautographs while plants were growing and by counting separated plant parts at the end of the experiment. Both 51Cr and 59Fe were absorbed through the surface of the soybean leaves and translocated throughout the plant, but only small amounts were translocated (4% of absorbed Cr). The absorption and translocation of Cr closely paralleled that of Fe. The results show that soybean plants will absorb Cr through their leaves and translocate it to other portions of the plant but the rate for these processes is relatively slow.

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