This paper describes changes in the fine structure of barley aleurone cells following treatment with gibberellic acid (GA3). Within 2 hr of GA3 treatment the aleurone grains lose the spherical appearance characteristic of aleurone cells incubated in water and buffer alone. This swelling increases with increased exposure of the cells to GA3 and reaches a maximum at about 10 hr. Accompanying this increase in volume of the aleurone grains is an increase in the amount of rough endoplasmic reticulum. The relevance of these GA3-stimulated changes in aleurone-cell fine-structure to GA3-regulated α-amylase production is discussed.
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Work supported by National Science Foundation grants GB-5863 and GB-8332. The skillful technical assistance of Mrs. Janet Price is gratefully acknowledged.
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Jones, R.L. Gibberellic acid and the fine structure of barley aleurone cells. Planta 87, 119–133 (1969). https://doi.org/10.1007/BF00386971
- Endoplasmic Reticulum
- Fine Structure
- Gibberellic Acid
- Rough Endoplasmic Reticulum
- Appearance Characteristic