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This article in CS

  1. Vol. 34 No. 4, p. 1116-1120
    Received: June 21, 1993

    * Corresponding author(s): c040ag@tamvml.tamu.edu
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Internodal Compartmentation of Stem-Infused [14C]Sucrose in Sweet and Grain Sorghum

  1. Lee Tarpley,
  2. Donald M. Vietor  and
  3. Frederick R. Miller
  1. Dep. of Soil and Crop Sci., Texas A%M Univ., College Station, TX 77843-2474



Stem infusion was evaluated for quantifying downward movement, intracellular allocation, and interorgan partitioning of assimilate in sweet and grain sorghum [Sorghum bicolor (L.) Moench] stems during mid-grain fill and post-black layer. Sucrose concentration did not vary below the site of infusion with [14C]sucrose, although gradients of intracellular 80%-ethanol soluble and insoluble 14C-components were established in the stem. Variation in gradient steepness between cultivars resulted from aspects of parenchymal uptake or phloem uptake of sucrose and appears related to sucrose-concentrating ability. The introduced [14C]sucrose concentration gradient in stem tissue is useful for studying stem mechanisms that controls ink strength.

Manuscript no. TA 31292.

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Copyright © 1994. Crop Science Society of America, Inc.Copyright © 1994 by the Crop Science Society of America, Inc.