Do growth substances regulate the phloem as well as the xylem transport of nutrients to the strawberry receptacle?

Fruits of first or second order of strawberry cv. Talisman were used for the experiments. Fourteen d after pollination they were deprived of achenes and the receptacles were treated for 3 d with a mixture of indoleacetic acid (IAA), gibberellic acid (GA₃) and kinetin at a concentration of 3·10^-4 M. Then ¹⁴C]sucrose and ³²PO ₄ ^3- were applied to the surface of the leaves or to the root medium. Only the transport from the leaves, not from roots, underwent hormonal stimulation; moreover, both markers were affected by the growth regulators to a similar degree.Abbreviations GA₃ gibberellicacid - IAA indole-3-aceticacid