Evidence for gibberellin-like substances in phloem exudate of higher plants
- 1 January 1968
- journal article
- Published by Springer Nature in Planta
- Vol. 82 (1) , 22-32
- https://doi.org/10.1007/bf00384695
Abstract
Samples of sieve-tube sap were obtained as honeydew from aphids feeding on three species of higher plants. The honeydew was extracted, chromatographed and tested in several bioassays for the presence of gibberellin-like substances. The bioassay results indicated that gibberellin-like substances were translocated in the phloem of dandelion (Taraxacum officinale), broad bean (Vicia faba) and willow (Salix viminalis). Results obtained with willow showed that the concentration of gibberellin-like substances in the sieve-tube sap is daylength dependent, high levels being present in plants maintained under long days and low levels in short day plants.Keywords
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