Claim · model-written summary
Low soil water availability decreased stomatal conductance of olive trees to 69.3 mmol/m2.s, versus 98.5 mmol/m2.s for irrigated trees.
- Taxon
- Olea europaea
Olea europaeat0 - Treatment
- low soil water availabilitye7
- Outcome
- stomatal conductancee7
- Direction
- decreaseinferrede7
- Value
- 69.3 mmol/m2.se7
- Comparator
- irrigated treese7
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“olive trees (Olea europaea L. cv. Chemlali Sfax)”
e7“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)”
Title
B. Ben Rouina; A. Trigui; R. d’Andria; et al. Australian Journal of Experimental Agriculture 2007. doi:10.1071/ea05206
Other claims from this paper (12)
- Observation Irrigated olive trees kept predawn leaf water potential above –1.52 MPa.
- Intervention effect Predawn leaf water potential of rain-fed olive trees on sandy soil decreased to about –3.2 MPa.
- Intervention effect Predawn leaf water potential of rain-fed olive trees on sandy-loam clay soil decreased to about –3.6 MPa.
- Intervention effect Midday minimal leaf water potential of rain-fed olive trees on sandy soil decreased to –4.15 MPa.
- Intervention effect Midday minimal leaf water potential of rain-fed olive trees on sandy-loam clay soil decreased to –4.71 MPa.
- Observation Midday minimal leaf water potential of irrigated olive trees was –1.95 MPa.
- Intervention effect Relative water content was lower in rain-fed trees and trees under severe drought than in irrigated trees, at 54 and 43.6% versus 80%.
- Observation When relative water content fell below 50% in August, progressive canopy desiccation and death of terminal shoots were observed on the sandy-loam clay soil.
- Intervention effect Low soil water availability decreased the net photosynthetic rate of rain-fed olive trees on sandy soil to 5.3 µmol/m2.s, versus 10.3 µmol/m2.s for irrigated trees.
- Intervention effect Water use efficiency of rain-fed olive trees increased by more than 50% compared with irrigated trees (7.6 versus 4.7 µmol CO2/mmol H2O).
- Intervention effect The authors conclude that olive trees respond to drought with significant changes in their physiological and biological mechanisms.
- Association The authors suggest that marginal soils can restrict olive growth and lower yields.