Effects of water stress and soil type on photosynthesis, leaf water potential and yield of olive trees (Olea europaea L. cv. Chemlali Sfax)
B. Ben Rouina A D , A. Trigui A , R. d’Andria B , M. Boukhris C and M. Chaïeb CA Institut de l’Olivier, BP. 1087, 3000 Sfax, Tunisia.
B Istituto per i Sistemi Agricoli e Forestali del Mediterraneo, 80056 Ercolano (Naples), Italy.
C Faculté des Sciences de Sfax, BP 802, 3018 Sfax, Tunisia.
D Corresponding author. Email: rouina.bechir@iresa.agrinet.tn
Australian Journal of Experimental Agriculture 47(12) 1484-1490 https://doi.org/10.1071/EA05206
Submitted: 3 August 2005 Accepted: 1 June 2007 Published: 16 November 2007
Abstract
In Tunisia, olives are grown under severe rain-fed, arid conditions. To determine the behaviour of olive trees (cv. Chemlali Sfax) during the severe drought affecting Tunisian arid areas in 2002, a range of physiological parameters were investigated in three adjacent orchards. Two olive orchards were rain-fed, one located on a sandy soil, and the other on a sandy-loam clay soil. A third orchard was also located on sandy soil, but received remedial irrigation (415 mm of water per year; ~40% of olive evapotranspiration). Predawn leaf water potential (Ψpd) did not fall below –1.52 MPa for irrigated olive trees. However, a large decrease in Ψpd was observed for rain-fed olive trees in the same period with Ψpd measured at about –3.2 MPa on sandy soil and –3.6 MPa on sandy-loam clay soil. At the same time, the minimal leaf water potential recorded at midday (Ψmin) decreased to –4.15 MPa and –4.71 MPa in the rain-fed trees for sandy and sandy-loam clay soil, respectively. For irrigated trees, the Ψmin was –1.95 MPa. These results were associated with relative water content, which varied from 80% for irrigated trees to 54 and 43.6%, respectively, for rain-fed trees and trees subjected to severe drought. In August, when the relative water content values were less than 50%, a progressive desiccation in the outer layer of canopy and death of terminal shoots were observed in trees, which grew on the sandy-loam clay soil. Furthermore, low soil water availability also affected (negatively) the net photosynthetic rate in rain-fed orchards (10.3 µmol/m2.s for irrigated trees v. 5.3 µmol/m2.s in rain-fed trees on sandy soil) and stomatal conductance (98.5 mmol/m2.s v. 69.3 mmol/m2.s). However, it improved water use efficiency (7.6 v. 4.7 µmol CO2/mmol H2O), which increased by more than 50% in both groups of rain-fed trees compared with the irrigated ones. We can conclude that olive trees respond to drought by showing significant changes in their physiological and biological mechanisms. These results also help our understanding of how olive trees cope with water stress in the field and how marginal soils can restrict growth and lower yields.
Acknowledgements
The authors would like to thank Mr A. Hajji from the Engineering School of Sfax for his help with the English in this paper.
Abdel Rahman AA,
Shalaby AF, Balegh MS
(1966) Water economy of olive under desert conditions. Flora 156, 202–219.
Ayton J,
Mailer RJ,
Robards K,
Orchard B, Vonarx M
(2001) Oil concentration and composition of olives during fruit maturation in south-western New South Wales. Australian Journal of Experimental Agriculture 41, 815–821.
| Crossref | GoogleScholarGoogle Scholar |
Ben Rouina B,
Taamallah H, Trigui A
(1999) L’enracinement de l’olivier et ses variations en fonction de la nature du sol en milieu aride. Revue des Régions Arides Numéro spécial, 182–190.
Ben Rouina B,
Boukhris M, Trigui A
(2002) Effect of the climate and the soil conditions on crops performance of the Chemlali Sfax olive trees. Acta Horticulturae 586, 285–289.
Ben Rouina B,
Trigui A,
Boukhris M,
Jilani S,
Omri A, Jribi A
(2004) Impacts de la nature du sol sur la vigueur et la production de l’olivier au Sud tunisien. Revue des Régions Arides. Numéro spécial. Tome 2, 512–522.
Bosabalidis AM, Kofidis G
(2002) Comparative effects of drought stress on leaf anatomy of two olive cultivars. Plant Science 163, 375–379.
| Crossref | GoogleScholarGoogle Scholar |
Centritto M,
Wahbi S,
Serraj R, Chaves MM
(2005) Effects of partial rootzone drying (RPD) on adult olive tree (Olea europaea L.) in field conditions under arid climate. II. Photosynthetic responses. Agriculture Ecosystems & Environment 106, 303–311.
| Crossref | GoogleScholarGoogle Scholar |
Chartzoulakis K,
Patakas A, Bosabadilis A
(1999) Comparative studies on gas exchange, water relations and leaf anatomy of two olive cultivars grown under well-irrigated and drought conditions. Zeitschrift für Naturforschung 54, 688–692.
Chaves MM,
Pereira JS,
Maroco J,
Rodrigues CP,
Osorio ML,
Carvalho I,
Faria T, Pinheiro C
(2002) How plants cope with water stress in the field. Photosynthesis and growth. Annals of Botany 89, 907–916.
| Crossref | GoogleScholarGoogle Scholar | PubMed |
Costantini A,
Doley D, So HB
(1996) Early Pinus caribaea var. hondurensis root development. 2. Influence of soil strength. Australian Journal of Experimental Agriculture 36, 847–859.
| Crossref | GoogleScholarGoogle Scholar |
Davis SD,
Ewers FW,
Sperry JS,
Portwood KA,
Crocker MC, Adams GC
(2002) Shoot dieback prolonged drought in Ceathus (Rhamnaceae) chaparral of California: a possible case of hydraulic failure. American Journal of Botany 89, 820–828.
Fernandez JE,
Moreno F,
Giron IF, Blazquez OM
(1997) Stomatal control of water use in olive tree leaves. Plant and Soil 190, 179–192.
| Crossref | GoogleScholarGoogle Scholar |
French RJ, Ewing MA
(1989) Soil type influences the relative yields of different cereals and crop legumes in the Western Australian wheat belt. Australian Journal of Experimental Agriculture 29, 829–835.
| Crossref | GoogleScholarGoogle Scholar |
Giorio P,
Sorrentino G, d’Andria R
(1999) Stomatal behaviour, leaf water status and photosynthetic response in field-grown olive trees under water deficit. Environmental and Experimental Botany 42, 95–104.
| Crossref | GoogleScholarGoogle Scholar |
Guswa AJ
(2005) Soil moisture limits on plant uptake: an upscaled relationship for water-limited ecosystems. Advances in Water Resources 28, 543–552.
| Crossref | GoogleScholarGoogle Scholar |
Lavee S, Wodner M
(2004) The effect of yield, harvest time and fruit size on the oil content in fruits of irrigated olive trees (Olea europaea L.), cvs. Barnea and Manzanillo. Scientia Horticulturae 99, 267–277.
| Crossref | GoogleScholarGoogle Scholar |
Mannina L,
Sobolev AP, Serge A
(2003) Olive oil as seen by NMR and chemometrics. Spectroscopy Europe 15(3), 6–14.
Masmoudi Ch,
Masmoudi MM, Ben Mechlia N
(2004) Irrigation de l’olivier: cas des jeunes plantations. Revue Ezzaitouna 10(1&2), 57–65.
Moriana A,
Villalobos FJ, Fereres E
(2002) Stomatal and photosynthetic responses of olive (Olea europaea L.) leaves to water deficits. Plant, Cell & Environment 25, 395–405.
| Crossref | GoogleScholarGoogle Scholar |
Rhizopoulou S,
Melethiou-Christou MS, Diamantoglou S
(1991) Water relations for sun and shade leaves of four mediterranean evergreen sclerophylls. Journal of Experimental Botany 42, 627–635.
| Crossref | GoogleScholarGoogle Scholar |
Scholander PF,
Hammel HT,
Bradstreet ED, Hommingsen EA
(1965) Sap pressure in vascular plants. Science 148, 339–346.
| Crossref | GoogleScholarGoogle Scholar | PubMed |
Tognetti R,
d’Andria R,
Morelli G,
Calandrelli D, Fragnito F
(2004) Irrigation effects on daily seasonal variations of trunk sap flow and leaf water relations in olive trees. Plant and Soil 263, 249–264.
| Crossref | GoogleScholarGoogle Scholar |
Wahbi S,
Wakrim R,
Aganchich B,
Tahi H, Serraj R
(2005) Effects of partial rootzone drying (RPD) on adult olive tree (Olea europaea L.) in field conditions under arid climate. I. Physiological and agronomic responses. Agriculture Ecosystems & Environment 106, 289–301.
| Crossref | GoogleScholarGoogle Scholar |