Effect of Salt Stress on Growth and on the Detoxifying Pathway of Pedunculate Oak Seedlings (Quercus robur L.)

Sehmer, Laurence; Alaoui-Sossé, Badr; Dizengremel, Pierre

doi:10.1016/s0176-1617(11)81427-6

Cited by 34 publications

(20 citation statements)

References 18 publications

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“…Indeed, Singha and Choudhuri (1990) reported that superoxide and H,O, could be important in the mechanism of salt injury. This notion was corroborated by subsequent reports indicating an increase in the activities of antioxidant enzymes in response to high salinity, and by correlations of salt tolerance with antioxidant enzyme levels (Gossett et al, 1994;Olmos et al, 1994;Hernandez et al, 1995;Sehmer et al, 1995). In our experiments the chloroplasts of salt-stressed transgenic plants exhibited elevated activities not only of SOD but also of APx in comparison with salt-stressed control plants (see above).…”

Section: Effect Of Trfesod On Lnduction Of Antioxidant Enzymes Duringsupporting

confidence: 92%

“…Plants respond to salt stress with increases in antioxidant enzyme activities, indicating that oxidative stress is involved in salt stress (Gossett et al, 1994;Hernandez et al, 1995;Sehmer et al, 1995). To study the effect of FeSOD overproduction on salt tolerance, we grew transgenic and control plants under salt stress (see "Materials and Meth- ods").…”

Section: Effect Of Trfesod On Lnduction Of Antioxidant Enzymes Duringmentioning

confidence: 99%

“…11 2, 1996 stress arises, for example, when high irradiance is combined with chilling temperatures, drought, or heat (Bowler et al, 1992). Salt stress is another condition that may give rise to oxidative stress, as suggested by the increase in activities of antioxidant enzymes in response to high salinity, and by the correlation of salt tolerance with antioxidant enzyme levels (Gossett et al, 1994;Olmos et al, 1994;Hernandez et al, 1995;Sehmer et al, 1995).…”

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confidence: 99%

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Enhancement of Oxidative Stress Tolerance in Transgenic Tobacco Plants Overproducing Fe-Superoxide Dismutase in Chloroplasts

et al. 1996

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A chimeric gene consisting of the coding sequence for chloroplastic Fe superoxide dismutase (FeSOD) from Arabidopsis thaliana, coupled to the chloroplast targeting sequence from the pea ribulose-1,5-bisphosphate carboxylase/oxygenase small subunit, was expressed in Nicotiana tabacum cv Petit Havana SR1. Expression of the transgenic FeSOD protected both the plasmalemma and photosystem II against superoxide generated during illumination of leaf discs impregnated with methyl viologen. By contrast, overproduction of a mitochondrial MnSOD from Nicotiana plumbaginifolia in the chloroplasts of cv SR1 protected only the plasmalemma, but not photosystem II, against methyl viologen (L. Slooten, K. Capiau, W. Van Camp, M. Van Montagu, C. Sybesma, D. Inze [1995] Plant Physiol 107: 737–750). The difference in effectiveness correlates with different membrane affinities of the transgenic FeSOD and MnSOD. Overproduction of FeSOD does not confer tolerance to H2O2, singlet oxygen, chilling-induced photoinhibition in leaf disc assays, or to salt stress at the whole plant level. In nontransgenic plants, salt stress led to a 2- to 3-fold increase in activity, on a protein basis, of FeSOD, cytosolic and chloroplastic Cu/ZnSOD, ascorbate peroxidase, dehydroascorbate reductase, and glutathione reductase. In FeSOD-overproducing plants under salt stress, the induction of cytosolic and chloroplastic Cu/ZnSOD was suppressed, whereas induction of a water-soluble chloroplastic ascorbate peroxidase isozyme was promoted.

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Section: Effect Of Trfesod On Lnduction Of Antioxidant Enzymes Duringsupporting

confidence: 92%

Section: Effect Of Trfesod On Lnduction Of Antioxidant Enzymes Duringmentioning

confidence: 99%

mentioning

confidence: 99%

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Enhancement of Oxidative Stress Tolerance in Transgenic Tobacco Plants Overproducing Fe-Superoxide Dismutase in Chloroplasts

et al. 1996

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“…The production of oxygen radicals could also play a significant role in the mechanism of salt injury (Singha and Choudhuri 1990). Changes in enzyme activities (superoxide dismutase, ascorbate peroxidase and glutathione reductase) due to salt stress have been previously mentioned (Hernandez et al 1993;Sehmer et al 1995). In this context, the role of NADP-ME needs to be clarified as well as that of NAD-ME, which could also participate in the removal of activated oxygen species in mitochondria.…”

Section: Discussionmentioning

confidence: 99%

NaCl-induced changes of NAD(P) malic enzyme activities in Eucalyptus citriodora leaves

Aragão

Jolivet

Lima

et al. 1997

Trees

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AbstractmThree-month-old plants of Eucalyptus citriodora were grown in a greenhouse in a culture medium adjusted either to 50 or 100 mM NaCl. Sodium was rapidly absorbed by the plants and as early as 3 weeks after treatment, an increased Na + level was observed in shoots of 50 mM NaCl plants. At this stage of treatment, the growth of plants was not reduced but the malate metabolism was modified. The malate content decreased in leaves while the specific activities of NAD and NADP-malic enzymes increased. The stimulation in enzyme activity was more pronounced for NADP-malic enzyme but for both enzymes, enzyme activity diminished as early as 5 weeks after treatment. The immunological study showed that the higher activity of NAD-malic enzyme was linked to an increase in the protein amount. By contrast, a more active form of the NADPmalic enzyme mainly accounted for the higher activity of this enzyme without involving modification in the electrophoretic mobility of the protein. The 100 mM NaCl treatment also induced changes in the malic enzyme behaviour, the magnitude of the response however being less than for the 50 mM treatment. These results are discussed, mainly considering the role of these enzymes in the reducing power of the leaf cell.

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“…Damage to trees caused by the pollution of soil with salt is mostly observed in urban areas, usually along transportation routes characterized by heavy traffic (e.g., Sehmer et al 1995;Marosz and Nowak 2008;Lax and Peterson 2009;Fay and Shi 2012). Depending on the sensitivity of the particular species of tree and the degree of accumulation of Cl, the first visible signs of damage appear during the spring leaf bud burst and leaf growth.…”

Section: Introductionmentioning

confidence: 99%

Effect of salt stress on prenol lipids in the leaves of Tilia 'Euchlora'

et al. 2014

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Soil contamination caused by the NaCl used to de-ice slippery roads in winter is now recognized as one of the major causes of nutrient disorders and death in urban trees. It is believed that polyisoprenoids may have a specific role in the adaptation of plants to adverse conditions and habitats; it is further believed that in the cell, they may exhibit a protective effect in response to biotic and abiotic stress. The aim of this study was to evaluate the effect of salt stress on the content of prenol lipids in the leaves of Crimean linden (Tilia 'Euchlora'). The Cl content in the slightly damaged ("healthy") leaves averaged 0.96%, while that in the heavily damaged ("sick") leaves averaged 2.02%. The leaves of control trees contained on average 0.57% Cl. The Na contents in the healthy and damaged leaves were 208 mg/kg and 1038 mg/kg, respectively, and the Na content in the control areas was 63 mg/kg. A mixture of polyprenols consisting of four compounds, prenol-9, prenol-10, prenol-11 and prenol-12, was identified in the leaves of Crimean linden. This mixture was dominated by prenol-10 (2.16-6.90 mg/g). The polyprenol content was highest in the leaves of "healthy" trees (approximately 13.31 mg/g), was lower in the case of "sick" trees (approximately 9.18 mg/g), and was the lowest in the control trees (mean 4.71 mg/g). No changes were observed in the composition of the mixture of polyprenols under these conditions. The results suggest that polyprenols may affect the accumulation of Cl in leaves. This phenomenon is evidenced by the high content of prenols in the leaves of trees considered "healthy" but growing under conditions of increased soil salinity and the lower content of prenols in the leaves of the "sick" and control trees. It is advisable to further investigate the role of prenol lipids in the leaves of trees subjected to salt stress.

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Effect of Salt Stress on Growth and on the Detoxifying Pathway of Pedunculate Oak Seedlings (Quercus robur L.)

Cited by 34 publications

References 18 publications

Enhancement of Oxidative Stress Tolerance in Transgenic Tobacco Plants Overproducing Fe-Superoxide Dismutase in Chloroplasts

Enhancement of Oxidative Stress Tolerance in Transgenic Tobacco Plants Overproducing Fe-Superoxide Dismutase in Chloroplasts

NaCl-induced changes of NAD(P) malic enzyme activities in Eucalyptus citriodora leaves

Effect of salt stress on prenol lipids in the leaves of Tilia 'Euchlora'

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