ISHS Acta Horticulturae 449: II International Symposium on Irrigation of Horticultural Crops
TRANSPIRATION AND WATER RELATIONS IN THREE PEACH X ALMOND HYBRID ROOTSTOCKS |
| Authors: | R. Massai, R. Gucci |
| Keywords: | Prunus persica, root, sap flow, water stress |
| Abstract:
The effect of the rootstock on scion water relations was evaluated in container-grown Prunus plants. The leaf water potential (  w), stem sap flow (SF), and canopy transpiration (E) of peach grafted onto three peach x almond hybrid rootstocks (‘GF 677’, ‘I.S.5/23’ and ‘I.S.5/29’) were compared with those of the rootstock plants under irrigated and unirrigated conditions.
The three rootstocks were different in vigour and induced productivity.
The leaf w of cultivar/rootstock combinations were higher than those of the rootstock only but SF and E were lower in the cultivar/rootstock combinations than in the rootstock only for all three rootstocks.
The highest E was measured in the least vigorous rootstock (‘I.S.5/23’) regardless of the presence of the scion cultivar.
Differences in w, SF, and E were mainly attributable to the characteristics of the root system and the canopy/root relationships established after grafting.
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