The effects of rootstock vigour on scion xylem hydraulic conductivity were studied on potted trees of cv. ‘Armking’ nectarine grafted onto GF677 (vigorous) and MrS 2/5 (low-vigour) rootstocks. Water potential gradients of non-transpiring leaves were measured at three levels of the stem starting at 10 cm above the graft-point. Transpiration rates were estimated by weighing. Two sets of measurements were taken on the same trees, at two different transpiration-rate levels obtained by imposing a different level of evaporative demand. Measurements were taken after allowing transpiration to reach a steady-state (20 minutes after any environmental perturbation). Trees grafted onto the low-vigour rootstock (MrS 2/5) showed the lowest water potential at all levels along the stem and the lowest hydraulic conductivity along the stem, about half the values observed on GF677-grafted and self-rooted trees.

MOTISI A, PERNICE F, SOTTILE F, CARUSO T (2004). Rootstock Effect on Stem Water Potential Gradients in cv. 'Armking' Nectarine Trees. In ROOTSTOCK EFFECT ON STEM WATER POTENTIAL GRADIENTS IN CV. 'ARMKING' NECTARINE TREES (pp.75-79). International Society for Horticultural Science [10.17660/ActaHortic.2004.658.7].

Rootstock Effect on Stem Water Potential Gradients in cv. 'Armking' Nectarine Trees

MOTISI, Antonio;PERNICE, Fulvio;SOTTILE, Francesco;CARUSO, Tiziano
2004-01-01

Abstract

The effects of rootstock vigour on scion xylem hydraulic conductivity were studied on potted trees of cv. ‘Armking’ nectarine grafted onto GF677 (vigorous) and MrS 2/5 (low-vigour) rootstocks. Water potential gradients of non-transpiring leaves were measured at three levels of the stem starting at 10 cm above the graft-point. Transpiration rates were estimated by weighing. Two sets of measurements were taken on the same trees, at two different transpiration-rate levels obtained by imposing a different level of evaporative demand. Measurements were taken after allowing transpiration to reach a steady-state (20 minutes after any environmental perturbation). Trees grafted onto the low-vigour rootstock (MrS 2/5) showed the lowest water potential at all levels along the stem and the lowest hydraulic conductivity along the stem, about half the values observed on GF677-grafted and self-rooted trees.
Settore AGR/03 - Arboricoltura Generale E Coltivazioni Arboree
International Symposium on Rootstocks for Deciduous Fruit Tree Species
Zaragoza, Spain
31 October 2004
I
2004
5
MOTISI A, PERNICE F, SOTTILE F, CARUSO T (2004). Rootstock Effect on Stem Water Potential Gradients in cv. 'Armking' Nectarine Trees. In ROOTSTOCK EFFECT ON STEM WATER POTENTIAL GRADIENTS IN CV. 'ARMKING' NECTARINE TREES (pp.75-79). International Society for Horticultural Science [10.17660/ActaHortic.2004.658.7].
Proceedings (atti dei congressi)
MOTISI A; PERNICE F; SOTTILE F; CARUSO T
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/20395
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