Influence of salinity on root hydraulic properties of three olive varieties
2011 | journal article. A publication with affiliation to the University of Göttingen.
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Influence of salinity on root hydraulic properties of three olive varieties
Rewald, B.; Leuschner, C.; Wiesman, Z. & Ephrath, J. E. (2011)
Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology, 145(1) art. PII 931913788. DOI: https://doi.org/10.1080/11263504.2010.514130
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Details
- Authors
- Rewald, Boris; Leuschner, C.; Wiesman, Z.; Ephrath, Jhonathan E.
- Abstract
- Three varieties of olive, Barnea, Arbequina and Proline, varying in salt tolerance, were examined to check the sensitivity of their root system hydraulic properties to salinity. Up to three levels of saline water (EC=1.2, 4.2 and 7.5 dS m-1) were used for long-term irrigation of mature trees. Specific conductivities and embolism rates of roots and branches were estimated by low-pressure conductivity measurement; variability and plasticity of root and branch axial conductivities were calculated. Cross-sections of roots were analysed with respect to xylem anatomy. Barnea, and to a minor degree Arbequina, were found to be more salt-resistant than Proline. Axial root hydraulics under salt stress reacted in a more plastic fashion than branch conductivities. Increased specific conductivities of roots, different plasticities of root hydraulics and modifications in mean conduit diameters can be dismissed as foremost reasons of the observed differences in salt resistance. Instead, a high within-population variability in root conductivity, as found in the salt-tolerant Barnea and Arbequina varieties, coming to full effect in high conductivity roots of Barnea trees, and an increased bimodal distribution of conduit sizes may represent favourable traits to enhance water uptake in soils with heterogeneous salinity.
- Issue Date
- 2011
- Status
- published
- Publisher
- Taylor & Francis Ltd
- Journal
- Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology
- ISSN
- 1724-5575; 1126-3504
- Sponsor
- European Union