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Translocation of shoot-applied indolylacetic acid into the roots of Populus tremula

, : Translocation of shoot-applied indolylacetic acid into the roots of Populus tremula. Physiologia Plantarum 27(3): 412-416

The application of 10 to 100 mu g of IAA to the leaves of rooted cuttings of P. tremula, or to the cut stem surface above the mature leaves, caused an inhibition of root growth after three hours and swelling of the root-tips. Root growth was resumed within 24 hours after the treatment. Labelled IAA applied to a cut stem surface or to mature leaves could be isolated from the roots 3-24 hours later. The ethanol-soluble activity decreased rapidly, indicating a rapid metabolism or binding of IAA.


DOI: 10.1111/j.1399-3054.1972.tb03636.x

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