Effects of cadmium on the co-ordination of nitrogen and carbon metabolism in bean seedlings

Gouia, Houda; Suzuki, Akira; Brulfert, J.; Ghorbal, Mohamed Habib

doi:10.1078/0176-1617-00785

Cited by 92 publications

(49 citation statements)

References 48 publications

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“…39 The effect of Cd on N and S assimilation pathway has been studied in several plants showing an inhibition of the nitrate uptake rate and the activity of the enzymes involved in the nitrate assimilation pathway. [31][32][33][34][35] It has been reported that metal exposure to plants also leads to a significant alteration in S metabolism. 80 It caused induction of enzymes of S assimilation pathway in plants.…”

Section: Cadmium Stress and Sulfur Metabolismmentioning

confidence: 99%

“…27,28 The effect of Cd on nitrate and S assimilation has been studied in several plants showing an inhibition of the nitrate uptake rate and the activity of the enzymes involved in the N assimilation pathway. 11,[29][30][31][32][33][34][35] Alternatively, Cd-caused induction of enzymes of S assimilation pathway has been reported in many plants. 19,36,37 Therefore, the regulation of S assimilation may be necessary to ensure an adequate supply of S compounds required for heavy metal tolerance.…”

Section: Cadmium Stress Tolerance In Crop Plantsmentioning

confidence: 99%

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Cadmium stress tolerance in crop plants

Gill

Tuteja

2011

Plant Signaling & Behavior

340

137

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Section: Cadmium Stress and Sulfur Metabolismmentioning

confidence: 99%

Section: Cadmium Stress Tolerance In Crop Plantsmentioning

confidence: 99%

Cadmium stress tolerance in crop plants

Gill

Tuteja

2011

Plant Signaling & Behavior

340

137

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“…In many plants Cd enhances the level of lipid peroxidation and causes alterations in antioxidant systems (Somashekaraiah et al, 1992). The harmful effects of Cd 2+ might be explained by its ability to inactivate enzymes, possibly through reaction with the SH-groups of proteins (Gouia et al, 2004). Consequently, the alleviation of environment pollution by Cd is a growing concern in the research community.…”

Section: Introductionmentioning

confidence: 99%

Role of salicylic acid in regulation of cadmium toxicity in wheat ( Triticum aestivum L.)

Moussa

El-Gamal²

2009

Acta Agronomica Hungarica

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Treatment with CdCl 2 (0, 100, 400 and 1000 µM) resulted in the inhibition of root dry biomass and root elongation and to increased Cd accumulation in the roots. These treatments also decreased the relative water content, chlorophyll content, 14 CO fixation, phosphoenol pyruvate carboxylase and ribulose-1,5-bisphosphate carboxylase activity and abscisic acid (ABA) content, while increasing the malondialdehyde, hydrogen peroxide and free proline contents and causing changes in the chloroplast and root ultrastructure. Pretreatment of seeds with SA (500 µM) for 20 h resulted in the amelioration of these effects.

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“…Recent attention has focused on phosphoenol pyruvate carboxylase (PEPC), witch plays an anaplerotic role in the provision of C skeletons for amino-acid synthesis (Champigny & Foyer, 1992). Under stress condition, including that induced by Cd, PEPC activity increases (Ju et al, 1997;Foyer et al, 2003;Gouia et al, 2003). Previous studies have reported that the activities of PEPC and ICDH (NADP + -ICDH) co-ordinate C and N metabolism (Champigny & Foyer, 1992;Scheibl et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Physiological and biochemical effects of cadmium toxicity in enzymes involved in nitrogen and amino—acid metabolism in tomato plants

Chaffei-Haouari

Carrayol

Ghorbel

et al. 2009

Acta Botanica Gallica

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Abstract.-The activities of several enzymes related to amino-acid metabolism were investigated in tomato plants (Lycopersicon esculentum Mill. 63/5F1) in control and treated leaves and roots. Glutamine synthetase and glutamate synthase ferredoxine dependent activities rapidly declined in stress condition. In presence of cadmium, the decline of glutamine synthetase activity was retarded, while the activity of glutamate synthase significantly and more rapid declined. The activity of NADH-dependent glutamate dehydrogenase was markedly increased in presence of cadmium. Western blots analysis from cadmium treated plants, showed a decrease in chloroplastic GS (GS2) protein and an increase in cytosolic GS (GS1) and glutamate dehydrogenase (GDH) proteins. The activities of phosphoenol pyruvate carboxylase and NADP-dependent isocitrate dehydrogenase also increased in both organs of plantes treated. The activity of NAD and NADP-dependent malate dehydrogenase were decreased especially in leaves.Key words : cadmium -glutamine synthetase -glutamate synthase -glutamate dehydrogenase -tomato.Résumé.-Les activités de la majorité des enzymes impliquées dans le méta-bolisme d'amino-acides et de l'azote ont été examinées chez les plantules de tomate (Lycopersicon esculentum Mill. 63/5 F1) contrôles et traités dans les feuilles et les racines. Les activités de la glutamine synthétase et la glutamate synthase ferredoxine dépendante ont diminué rapidement en condition de stress. En présence du cadmium, la diminution de l'activité de la glutamine synthétase a été retardée, alors que l'activité de la glutamate synthase est significative. L'activité de la glutamate déshydrogénase NADH-dépendante a remarquablement augmenté. Les analyses de Western blot à partir des plantules traitées ont montré une baisse dans la protéine chloroplastique GS (GS2) et une augmentation des protéines GS cytosolique (GS1) et de la glutamate déshydrogénase (GDH). Les activités de la phosphoénol pyruvate carboxylase NADP-dépendante et isocitrate déshydrogénase ont augmenté dans les deux organes des plantes traitées. L'activité malate déshydrogénase NAD et NADPdépendant ont diminué spécialement dans les feuilles.Mots clés : cadmium -glutamine synthétase -glutamate synthase -glutamate déshydrogénase -tomate.received June 17, 2008, accepted December 12, 2008 Abbreviations -Cd = cadmium, GS = glutamine synthètase, Fd-GOGAT = ferredoxin dependent glutamate synthase, GDH = glutamate dehydrogenase, ICDH = isocitrate dehydrogenase, MDH = malate dehydrogenase, NAD-MDH = NAD-dependent MDH, NADP-MDH = NADP-dependent MDH, PEPC = phosphoenol pyruvate carboxylase.

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Effects of cadmium on the co-ordination of nitrogen and carbon metabolism in bean seedlings

Cited by 92 publications

References 48 publications

Cadmium stress tolerance in crop plants

Cadmium stress tolerance in crop plants

Role of salicylic acid in regulation of cadmium toxicity in wheat ( Triticum aestivum L.)

Physiological and biochemical effects of cadmium toxicity in enzymes involved in nitrogen and amino—acid metabolism in tomato plants

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