A greenhouse investigation of responses to different water stress regimes of Laurus nobilis trees from two climatic regions

Maatallah, Samira; Ghanem, Michel Edmond; Albouchi, Ali; Bizid, Essia; Lutts, Stanley

doi:10.1016/j.jaridenv.2009.09.008

Cited by 29 publications

(14 citation statements)

References 48 publications

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“…At the xeric site, the Mimizan population from the wetter climate had double the proline content compared to the other populations. This is in agreement with Maatallah et al (2010), who observed a higher accumulation of proline in the Laurus nobilis population from a humid origin but contradicts Huang et al (2009) and Xiao et al (2008, who observed a greater increase of free proline in the Populus cathayana population from the dry climate. The significant proline increase in Mimizan could be interpreted as a protective mechanism against water stress.…”

Section: Environmental Effect On Proline and Phytohormonessupporting

confidence: 91%

“…JA mediates local and systemic wound responses through distinct cell pathways in response to tissue injury (Koo and Howe 2009). The values of proline, ABA, IAA and SA were in the ranges of those formerly documented in other evergreen species (Duan et al 2009;Maatallah et al 2010;Mahouachi et al 2007;Munné-Bosch and Peñuelas 2003). Proline, ABA and IAA increased in response to water stress.…”

Section: Environmental Effect On Proline and Phytohormonesmentioning

confidence: 79%

“…This is in agreement with Li and Wang (2003) and Zhang et al (2004), who only obtained significant differences in ABA accumulation among Eucaliptus and Populus populations under severe water stress. Maatallah et al (2010) also found population differences in proline under the drought stress treatments and no differences between the controls. Therefore, physiological responses and drought adaptations are influenced by internal mechanisms and external environmental factors or by the interaction of both.…”

Section: Environmental Effect On Proline and Phytohormonesmentioning

confidence: 79%

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Aridity promotes differences in proline and phytohormone levels in Pinus pinaster populations from contrasting environments

Corcuera¹,

Gil‐Pelegrín²,

Notivol³

2011

Trees

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We analysed proline, abscisic acid, (ABA), jasmonic acid (JA), indole acetic acid (IAA) and salicylic acid (SA) accumulation after summer drought at two Pinus pinaster provenance-progeny trial sites. The aim of the study was to evaluate P. pinaster phenotypic plasticity and intraspecific variation in the endogenous concentrations of these metabolites and to determine the best stress indicators for family and population discrimination. The environmental effect was remarkable, as striking differences between the sites were obtained for all indicators except for SA, which was unaffected by the environmental conditions. The levels of proline, ABA and IAA were higher in the xeric than in the mesic site. In contrast, JA was higher in the mesic site. The higher variation displayed at the family level led to family differences for all parameters and sites. Differences in proline and ABA between populations were exclusively found in the xeric site, where the population from the wet climate showed higher accumulation. This study provides evidence for differentiation among P. pinaster populations and families in their plastic responses to drought and highlights the importance of considering intraspecific variability when evaluating biochemical stress indicators in environmental studies.

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Section: Environmental Effect On Proline and Phytohormonessupporting

confidence: 91%

Section: Environmental Effect On Proline and Phytohormonesmentioning

confidence: 79%

Section: Environmental Effect On Proline and Phytohormonesmentioning

confidence: 79%

See 1 more Smart Citation

Aridity promotes differences in proline and phytohormone levels in Pinus pinaster populations from contrasting environments

Corcuera¹,

Gil‐Pelegrín²,

Notivol³

2011

Trees

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“…According to Sanchez et al (1998) the pea cultivars which accumulated more proline had a lower water contents upon turgor loss. This seems to indicate that proline may play a protective role in minimizing the damage caused by dehydration by stabilizing cellular structures (Sanchez et al, 1998) or modification of cell wall proteome (Maatallah et al, 2010), a fact corroborated by the relative small decrease in CMS during severe water stress in two of the species tested in this study. According to Gomes et al (2010) high membrane stability in cells of drought-stressed coconut, as indicated by electrolyte leakage measurements and low drought-induced photoinhibition support the hypothesis of the protective role played by proline under severe water stress (Ψ PD = −1.2 MPa).…”

Section: Leaf Free Proline Contentsupporting

confidence: 73%

Antioxidant enzyme activity, proline accumulation, leaf area and cell membrane stability in water stressed Amaranthus leaves

Slabbert

Kruger

2014

South African Journal of Botany

100

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a b s t r a c tEdited by J van Staden Keywords: A. hybridus A. hypochondriacus Antioxidative enzymes A. tricolor Cell membrane stability Leaf area Leaf water status Metabolic response Osmoregulation Proline Relative water content Water stressTraditional crops are extremely important for food production in low income, food-deficit countries (LIFDCs) where they continue to be maintained by socio-cultural preferences and traditional uses. Significant potential exists to improve these crops, one of which is to select for improved productivity during moisture stress conditions. Germplasm of Amaranthus tricolor, Amaranthus hypochondriacus and Amaranthus hybridus were subjected to various screening methods to measure metabolic and physiological changes during water stress. The activities of enzymes involved in the oxygen-scavenging system during abiotic stress conditions (superoxide dismutase (SOD), ascorbate peroxidase (APX) and glutathione reductase (GR)), free proline production, leaf area (LA), cell membrane stability (CMS), leaf water potential (LWP) and relative water content (RWC) were measured in these three amaranth species during induced water stress. This study showed significant differences in metabolic responses during water deficit of the three species tested. Moisture stress and a decrease in RWC and LWP were first experienced in A. hybridus and A. hypochondriacus, followed by A. tricolor. There was an indirect correlation between leaf water status (RWC and LWP), enzyme activity, proline production and leaf area. The combined effect of GR, APX and SOD could ensure higher levels of regulation of the toxic effect of H 2 O 2 which could be associated with drought tolerance in Amaranthus. Distinct differences in onset of proline accumulation and the amount of accumulated in leaves upon induced water stress was noticed for the three amaranth species tested. Proline accumulation during water stress conditions in amaranth seems to be indirect and could possibly have a protective role apart from osmoregulation during stress conditions. This contention is supported by the decrease in leaf area and high cell membrane stability for two of the species tested. This study forms part of a project aimed at the development of improved traditional crops to contribute to food production and quality for subsistence farmers in areas with low precipitation or variable rainfall patterns.

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“…These studies have found that in leafy vegetables like spinach and lettuce, the relative amount of water (RWC) in the apoplast is in the range of 10%-40% [20]. Under conditions where the cell wall is less stretched as under drought stress conditions, the relative contribution of water retention by the apoplast becomes more significant [18,21]. Under conditions where the cell wall is less stretched as under drought stress conditions, the relative contribution of water retention by the apoplast becomes more significant [18,21].…”

Section: Introductionmentioning

confidence: 99%

Hyperelastic models for hydration of cellular tissue

Sman

2015

Soft Matter

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In this paper we present hyperelastic models for swelling elastic shells, due to pressurization of the internal cavity. These shells serve as model systems for cells having cell walls, as can be found in bacteria, plants and fungi. The pressurized internal cavity represents the cell vacuole with intact membrane at a certain turgor pressure, and the elastic shell represents the hydrated cell wall. At pressurization the elastic shell undergoes inhomogeneous deformation. Its deformation is governed by a strain energy function. Using the scaling law of Cloizeaux for the osmotic pressure, we obtain approximate analytical expressions of the cell volume versus turgor pressure - which are quite comparable to numerical solutions of the problem. Subsequently, we have simulated the swelling of shells - where the cell wall material is embedded with microfibrils, leading to strain hardening and anisotropic cell expansion. The purpose of our investigations is to elucidate the contribution of cell membrane integrity and turgor to the water holding capacity (hydration) of plant foods. We conclude with a discussion of the impact of this work on the hydration of food material, and other fields like plant science and the soft matter physics of responsive gels.

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A greenhouse investigation of responses to different water stress regimes of Laurus nobilis trees from two climatic regions

Cited by 29 publications

References 48 publications

Aridity promotes differences in proline and phytohormone levels in Pinus pinaster populations from contrasting environments

Aridity promotes differences in proline and phytohormone levels in Pinus pinaster populations from contrasting environments

Antioxidant enzyme activity, proline accumulation, leaf area and cell membrane stability in water stressed Amaranthus leaves

Hyperelastic models for hydration of cellular tissue

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