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This article in SSSAJ

  1. Vol. 32 No. 5, p. 698-704
     
    Received: Feb 20, 1968
    Published: Sept, 1968


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doi:10.2136/sssaj1968.03615995003200050033x

Nitrate-Stimulated Uptake and Transport of Strontium and Other Cations1

  1. W. A. Jackson and
  2. Doris Craig Williams2,3

Abstract

Abstract

Supplying nitrate to N-depleted wheat seedlings (Triticum vulgare, var. Atlas 66) stimulated the uptake of both divalent (Sr, Mn, and Mg) and monovalent (Cs, Na, K) cations. Rapid nitrate uptake, and the lower ambient acidity resulting from it, appeared to be partially responsible for the increase in cation uptake. Nevertheless, pretreatments with nitrate exerted some stimulation in Sr and Cs uptake, indicating an additional action of nitrate after it had entered the tissues. Pretreatment with nitrate, as well as its presence during the Sr uptake period, increased transport of Sr to the shoots more than total uptake. Transport to shoots of previously absorbed Sr was enhanced by subsequent nitrate treatments, the amount transported being significantly greater with nitrate salts of Ca, Mg, and Na than with K or NH4.

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