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Gibberellic acid and the fine structure of barley aleurone cells

III. Vacuolation of the Aleurone cell during the phase of ribonuclease release

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Summary

Ultrastructural changes in barley aleurone, cells treated with gibberellic acid (GA3) for 24–36 hr are described. Many large vacuoles are seen in the ground cytoplasm; the coalasce to form one large central vacuole. Evidence is presented indicating that the vacuoles are formed from the aleurone grains. The dictyosomes of aleurone cells treated with GA3 for 24 hr or longer proliferate many vesicles. This proliferation of dictyosome vesicles is associated with the phase of rapid ribonuclease release from the aleurone cell. Estimates indicate that microbodies are considerably reduced in number with GA3 treatment from 24–36, hr while the number of mitochondria is not substantially affected relative to controls. P-Protein-like material is seen in the cytoplasm of these cells often in close proximity to endoplasmic reticulum and spiny vesicles.

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Authors and Affiliations

  1. Department of Botany, University of California, Berkeley

    Russell, L. Jones & Janet M. Price

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  1. Russell
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  2. L. Jones
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  3. Janet M. Price
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Supported by National Science Foundation Grant No. GB8332.

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Russell, Jones, L. & Price, J.M. Gibberellic acid and the fine structure of barley aleurone cells. Planta 94, 191–202 (1970). https://doi.org/10.1007/BF00386129

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  • DOI: https://doi.org/10.1007/BF00386129

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