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Sida 1 från 69 resultat
Post-translational modifications of Medicago truncatula glutathione peroxidase 1 induced by nitric oxide.
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Plant glutathione peroxidases (Gpx) catalyse the reduction of various peroxides, such as hydrogen peroxide (H2O2), phospholipid hydroperoxides and peroxynitrite, but at the expense of thioredoxins rather than glutathione. A main function of plant Gpxs is the protection of biological membranes by
Glutathione Deficiency in Sinorhizobium meliloti Does Not Impair Bacteroid Differentiation But Induces Early Senescence in the Interaction With Medicago truncatula.
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Under nitrogen-limiting conditions, legumes are able to interact symbiotically with bacteria of the Rhizobiaceae family. This interaction gives rise to a new organ, named a root nodule. Root nodules are characterized by an increased glutathione (GSH) and homoglutathione (hGSH) content compared to
A Medicago truncatula homoglutathione synthetase is derived from glutathione synthetase by gene duplication.
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Glutathione (GSH) and homo-GSH (hGSH) are the major low-molecular weight thiols synthesized in Medicago truncatula. Two M. truncatula cDNAs (gshs1 and gshs2) corresponding to a putative GSH synthetase (GSHS) and a putative hGSH synthetase (hGSHS) were characterized. Heterologous expression of gshs1
Genome-wide profiling of expression and biochemical functions of the Medicago glutathione S-transferase gene family.
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Glutathione S-transferases are ubiquitous enzyme in plants, playing vital roles in several physiological and developmental processes. In this study we identified 73 GST genes from the genome of Medicago truncatula. The Medicago GSTs were divided to eight classes with tau and phi being the most
Glutathione and homoglutathione play a critical role in the nodulation process of Medicago truncatula.
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Legumes form a symbiotic interaction with bacteria of the Rhizobiaceae family to produce nitrogen-fixing root nodules under nitrogen-limiting conditions. This process involves the recognition of the bacterial Nod factors by the plant which mediates the entry of the bacteria into the root and nodule
(Homo)glutathione depletion modulates host gene expression during the symbiotic interaction between Medicago truncatula and Sinorhizobium meliloti.
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Under nitrogen-limiting conditions, legumes interact with symbiotic rhizobia to produce nitrogen-fixing root nodules. We have previously shown that glutathione and homoglutathione [(h)GSH] deficiencies impaired Medicago truncatula symbiosis efficiency, showing the importance of the low M(r) thiols
Glutathione synthesis is regulated by nitric oxide in Medicago truncatula roots.
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Glutathione (GSH) is one of the main antioxidants in plants. Legumes have the specificity to produce a GSH homolog, homoglutathione (hGSH). We have investigated the regulation of GSH and hGSH synthesis by nitric oxide (NO) in Medicago truncatula roots. Analysis of the expression level of
Cadmium-induced heme oxygenase-1 gene expression is associated with the depletion of glutathione in the roots of Medicago sativa.
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Following previous findings that cadmium (Cd) induces heme oxygenase-1 (HO1) gene expression in alfalfa seedling roots, we now show that the decreased glutathione (GSH) and ascorbic acid (AsA) contents, induction of HO-1 gene expression and its protein level by Cd was mimicked by a GSH depletor
Stress Responses in Alfalfa (Medicago sativa L.): VI. Differential Responsiveness of Chalcone Synthase Induction to Fungal Elicitor or Glutathione in Electroporated Protoplasts.
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Protoplasts derived from cell suspensions of alfalfa (Medicago sativa L.) responded to treatment with fungal elicitor (FE) by an increase in endogenous chalcone synthase (CHS) activity but were unresponsive to reduced glutathione (GSH). Preexposure of protoplasts to polyethylene glycol and
Crucial role of (homo)glutathione in nitrogen fixation in Medicago truncatula nodules.
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Legumes form a symbiotic interaction with bacteria of the Rhizobiaceae family to produce nitrogen-fixing root nodules under nitrogen-limiting conditions. We examined the importance of glutathione (GSH) and homoglutathione (hGSH) during the nitrogen fixation process. Spatial patterns of the
(Homo)glutathione deficiency impairs root-knot nematode development in Medicago truncatula.
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Root-knot nematodes (RKN) are obligatory plant parasitic worms that establish and maintain an intimate relationship with their host plants. During a compatible interaction, RKN induce the redifferentiation of root cells into multinucleate and hypertrophied giant cells essential for nematode growth
The thiol compounds glutathione and homoglutathione differentially affect cell development in alfalfa (Medicago sativa L.).
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Glutathione (GSH) is an important scavenger of Reactive Oxygen Species (ROS), precursor of metal chelating phytochelatins, xenobiotic defence compound and regulator of cell proliferation. Homoglutathione (hGSH) is a GSH homologue that is present in several taxa in the family of Fabaceae. It is
Rhizobium inoculation enhances copper tolerance by affecting copper uptake and regulating the ascorbate-glutathione cycle and phytochelatin biosynthesis-related gene expression in Medicago sativa seedlings.
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Despite numerous reports that legume-rhizobium symbiosis alleviates Cu stress in plants, the possible roles of legume-rhizobium symbiosis and the regulatory mechanisms in counteracting Cu toxicity remain unclear. Here, Sinorhizobium meliloti CCNWSX0020 was used for analyzing the effects of rhizobium
Overexpression of MsSiR enhances alkali tolerance in alfalfa (Medicago sativa L.) by increasing the glutathione content
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The sulfite reductase gene in Medicago sativa L. (MsSiR) encodes sulfite reductase (SiR) and catalyses the conversion of sulfite to sulfate in the sulfite assimilation pathway. In this study, we investigated the role of MsSiR in alfalfa by generating transgenic alfalfa that ectopically expressed
Carbon monoxide alleviates cadmium-induced oxidative damage by modulating glutathione metabolism in the roots of Medicago sativa.
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Using pharmacological and biochemical approaches, the role of cadmium (Cd)-induced carbon monoxide (CO) release and the relationship between CO and oxidative stress conferred by Cd exposure in the root tissues of alfalfa (Medicago sativa) plants were investigated. Cd treatments showed a
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