Comparative impacts of water stress on the leaf anatomy of a drought-resistant and a drought-sensitive olive cultivar
type: Dataset
contact point: Organization
  fn: CCSD
keyword: drought-resistant
keyword: journal-articles
keyword: infoeu-reposemanticsarticle
keyword: olivier
keyword: olea-europea
keyword: sdvsahortlife-sciences-q-bioagricultural-scienceshorticulture
keyword: drought-sensitive
landing page: 1462-0316
description: The effects of drought on several major morphological and anatomical features of leaves were investigated in an attempt to explain the origin of the difference in drought resistance between two olive (Olea europaea L.) cultivars, ('Chemlali' and 'Meski') previously demonstrated to be drought-resistant and drought-sensitive, respectively. Under water deficit conditions, 'Chemlali' maintained higher rates of photosynthetic assimilation and lower rates of transpiration compared to 'Meski'. In the present study, we found cultivar-dependent differences in leaf morpho-anatomical adaptations to drought stress. When subjected to water stress, the leaves of 'Chemlali' increased the thickness of their upper palisade and spongy parenchyma by 17% and 22%, respectively, compared with only 9% and 13% in the case of 'Meski'. A thicker palisade parenchyma could contain larger numbers of CO(2)-fixation sites, while a thicker spongy parenchyma could result in easier diffusion of CO(2) to these sites. Furthermore, stomatal density (SD) in 'Chemlali' leaves increased by 25% (vs. 7% for 'Meski' leaves) during drought treatment, which could also enhance the external supply of CO(2). Other morpho-structural traits implicated in the control of water loss were enhanced more in 'Chemlali' than in 'Meski' leaves. Under conditions of lower water availability, leaf size decreased by 24% in 'Chemlali' (vs. 15% in 'Meski'), trichome density (TD) increased by 25% (while remaining unchanged in 'Meski'), and the thickness of the upper and lower epidermis increased by 32% and 25%, respectively (while remaining unchanged in 'Meski'). The above morpho-anatomical adaptations should improve the water-use efficiency of the tree. These differential changes in leaf morphology and anatomy can explain, at least in part, the difference in drought resistance between the two cultivars. In particular, the upper palisade parenchyma, the spongy parenchyma, SD, and TD could be considered key structural features of l…
issued: 2026-05-05T21:25:57.547600
language: en
modified: 2026-05-05T21:25:57.547604

Comparative impacts of water stress on the leaf anatomy of a drought-resistant and a drought-sensitive olive cultivar
type: Distribution
access URL: https://hal.science/hal-00964718
format: HTML
issued: 2026-05-05T21:25:57.549196
modified: 2026-05-05T21:25:57.536249

test_moissonnage_selune
type: Agent