Fig. 1

Expression of selected phosphate starvation induced genes in the root tips of grafted grapevine after 28 d of either high or low phosphate treatment (dark or light bars respectively). Gene expression was quantified by RT-qPCR and expressed as normalized relative quantities (NRQs) in reciprocal scion/rootstock combinations of Vitis vinifera cv. Pinot noir (PN) and V. rupestris x V. berlandieri cv. 1103 Paulsen (1103P). Means, standard deviations and results of a two-way analysis of variance (p < 0.05, with Tukey’s Honest Significant Difference test) are shown