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This article in AJ

  1. Vol. 78 No. 6, p. 954-958
    Received: July 30, 1985

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Mobilization of Nitrogen-15 from Vegetative to Reproductive Tissue of Peanut1

  1. C. S. Kvien,
  2. R. W. Weaver and
  3. J. E. Pallas2



A field experiment was conducted to gain a greater understanding of vegetative N mobilization in the peanut (Arachis hypogaea L.) during the pod filling period. Vegetative tissue was labeled with foliarly applied 15NH4SO4 prior to initial pod set and mobilization of the incorporated 15N into various plant parts was then followed from initial pod set until harvest. We concluded from our analysis of individual plant parts that a portion of the 15N label moved out of all vegetative plant parts. Nitrogen concentration (g N kg−1 plant tissue) and 15N enrichment in the vegetative portion of both ‘Florunner’ and ‘Tamnut 74’ declined continuously until the optimum harvest date. The decline of 15N enrichment in the foliage over time was matched by a continuous increase in 15N by the developing fruit.

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