Rapid alteration of cellular redox homeostasis upon exposure to cadmium and mercury in alfalfa seedlings

Ortega-Villasante, Cristina; Hernández, Luís E.; Rellán‐Álvarez, Rubén; Campo, Francisca F. del; Carpena‐Ruiz, Ramón O.

doi:10.1111/j.1469-8137.2007.02162.x

Cited by 143 publications

(112 citation statements)

References 42 publications

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“…therein). Cd 2+ -induced H 2 O 2 might be produced by plasma membrane NADPH oxidase (Garnier et al, 2006;Ortega-Villasante et al, 2007) or originate in mitochondria and then diffuse to other parts of the cells and in the apoplastic space (Heyno et al, 2008). The plant response to Cd 2+ in terms of antioxidant activities varies greatly, depending on the enzyme, the plant species, the tissue analyzed, the plant age, the intensity of the Cd 2+ treatment, and its duration (Schutzendubel and Polle, 2002).…”

Section: Exposure To CDmentioning

confidence: 99%

Nitric Oxide Is Involved in Cadmium-Induced Programmed Cell Death in Arabidopsis Suspension Cultures

Michele

Vurro²,

Rigo³

et al. 2009

Plant Physiology

249

161

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Exposure to cadmium (Cd 2+ ) can result in cell death, but the molecular mechanisms of Cd 2+ cytotoxicity in plants are not fully understood. Here, we show that Arabidopsis (Arabidopsis thaliana) cell suspension cultures underwent a process of programmed cell death when exposed to 100 and 150 mM CdCl 2 and that this process resembled an accelerated senescence, as suggested by the expression of the marker senescence-associated gene12 (SAG12). CdCl 2 treatment was accompanied by a rapid increase in nitric oxide (NO) and phytochelatin synthesis, which continued to be high as long as cells remained viable. Hydrogen peroxide production was a later event and preceded the rise of cell death by about 24 h. Inhibition of NO synthesis by N G -monomethylarginine monoacetate resulted in partial prevention of hydrogen peroxide increase, SAG12 expression, and mortality, indicating that NO is actually required for Cd 2+ -induced cell death. NO also modulated the extent of phytochelatin content, and possibly their function, by S-nitrosylation. These results shed light on the signaling events controlling Cd 2+ cytotoxicity in plants.

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Section: Exposure To CDmentioning

confidence: 99%

Nitric Oxide Is Involved in Cadmium-Induced Programmed Cell Death in Arabidopsis Suspension Cultures

Michele

Vurro²,

Rigo³

et al. 2009

Plant Physiology

249

161

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“…In spite of that Cd is a non-redox-active metal; its toxicity is undoubtedly connected with increased levels of ROS. An enhanced level of lipid and protein peroxidation, increased level of ROS and activation of antioxidant apparatus indicated that in HM-stressed roots the presence of oxidative stress is a general syndrome in several plant species (Hegedüs et al 2001;Schützendübel et al 2001;Ranieri et al 2005;Garnier et al 2006;Rellán-Á lvarez et al 2006;Rodríguez-Serrano et al 2006;Ortega-Villasante et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Role of reactive oxygen species-generating enzymes and hydrogen peroxide during cadmium, mercury and osmotic stresses in barley root tip

Tamás

Mistrı́k

Huttová

et al. 2009

Planta

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The effect of cadmium (Cd) on the expression and activity of NADPH oxidase, peroxidase and oxalate oxidase as well as on the expression of aquaporins and dehydrins was studied in barley root tip. The root tip represented intact apical part of the barley root containing the root cap, meristems and elongation zone. Except stress induced by Cd, barley root tips were analysed after their exposure to phytotoxic concentration of mercury (Hg)-, hydrogen peroxide (H2O2)- or polyethylene glycol (PEG)-induced water stress in order to compare the Cd-induced changes with changes induced by these other stress factors. Cd, Hg, H2O2 and with some exceptions also PEG treatments caused similar alterations in the gene expression of reactive oxygen species (ROS)-generating and water deficiency-related genes, and in the activity of ROS-generating enzymes. These evidences support our opinion that ROS accumulation and water imbalance are the common symptoms of these stress factors and that the elevated production of H2O2 plays, probably as a signal molecule, a key role in the induction of plant responses to abiotic stresses in barley root tip. On the other hand, H2O2 at permanent high concentration is probably the main toxic factor during stress conditions.

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“…A number of reports exist on oxidative stress and defence mechanisms in plants under arsenic stress [99][100][101][102]. Arsenic generates reactive oxygen species (ROS) during the reduction of As V to As III , which is followed by methylation, a redox driven reaction that may give rise to ROS [103].…”

Section: Arsenic Induced Oxidative Stress and Response In Rice Plantmentioning

confidence: 99%

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

Mitra¹,

et al. 2017

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According to recent reports, millions of people across the globe are suffering from arsenic (As) toxicity. Arsenic is present in different oxidative states in the environment and enters in the food chain through soil and water. In the agricultural field, irrigation with arsenic contaminated water, that is, having a higher level of arsenic contamination on the top soil, which may affects the quality of crop production. The major crop like rice (Oryza sativa L.) requires a considerable amount of water to complete its lifecycle. Rice plants potentially accumulate arsenic, particularly inorganic arsenic (iAs) from the field, in different body parts including grains. Different transporters have been reported in assisting the accumulation of arsenic in plant cells; for example, arsenate (As V ) is absorbed with the help of phosphate transporters, and arsenite (As III ) through nodulin 26-like intrinsic protein (NIP) by the silicon transport pathway and plasma membrane intrinsic protein aquaporins. Researchers and practitioners are trying their level best to mitigate the problem of As contamination in rice. However, the solution strategies vary considerably with various factors, such as cultural practices, soil, water, and environmental/economic conditions, etc. The contemporary work on rice to explain arsenic uptake, transport, and metabolism processes at rhizosphere, may help to formulate better plans. Common agronomical practices like rain water harvesting for crop irrigation, use of natural components that help in arsenic methylation, and biotechnological approaches may explore how to reduce arsenic uptake by food crops. This review will encompass the research advances and practical agronomic strategies on arsenic contamination in rice crop.

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Rapid alteration of cellular redox homeostasis upon exposure to cadmium and mercury in alfalfa seedlings

Cited by 143 publications

References 42 publications

Nitric Oxide Is Involved in Cadmium-Induced Programmed Cell Death in Arabidopsis Suspension Cultures

Nitric Oxide Is Involved in Cadmium-Induced Programmed Cell Death in Arabidopsis Suspension Cultures

Role of reactive oxygen species-generating enzymes and hydrogen peroxide during cadmium, mercury and osmotic stresses in barley root tip

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

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