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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Impacts of water stress on gas exchange, water relations, chlorophyll content and leaf structure in the two main Tunisian olive (Olea europaea L.) cultivars
Scientia Horticulturae, Volume 119, No. 3, Year 2009
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Description
Leaf structural adaptations for the reduction of water loss were examined in two olive (Olea europaea L.) cultivars (Chemlali and Chétoui) growing under water stress conditions. Leaf measurements included leaf tissue thickness, stomatal density, trichome density, specific leaf area, leaf density, water relations, and gas exchange. We found considerable genotypic differences between the two cultivars. Chemlali exhibited more tolerance to water stress, with a thicker palisade parenchyma, and a higher stomatal and trichome density. Chemlali leaves also revealed lower specific leaf area and had higher density of foliar tissue and lower reduction in net CO2 assimilation rate. The mechanisms employed by these two cultivars to cope with water deficit are discussed at the morpho-structural level. The morphological and structural characteristics of the leaves are in accordance with physiological observations and contribute to the interpretation of why the olive cv. Chemlali is more drought-tolerant than cv. Chetoui. Furthermore, from the behaviour of Chemlali plants we consider this cultivar very promising for cultivation in semi-arid areas. © 2008 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Guerfel, Mokhtar
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Baccouri, Olfa
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Boujnah, Dalenda Mahjoub
Tunisia, Sfax
Institut de L'olivier Sfax
Chaïbi, Wided
Tunisia, Tunis
Unité de Recherche
Zarrouk, Mokhtar
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Statistics
Citations: 334
Authors: 5
Affiliations: 3
Identifiers
Doi:
10.1016/j.scienta.2008.08.006
ISSN:
03044238
Research Areas
Environmental