Mechanism of CATA3 induction by cadmium in sunflower leaves

Azpilicueta, Claudia E.; Benavides, María Patricia; Tomaro, Marı́a L.; Gallego, Susana M.

doi:10.1016/j.plaphy.2007.04.005

Cited by 50 publications

(22 citation statements)

References 39 publications

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“…However, in control plants, Ca produced a slight increase of O 2 ·2 accumulation in xylem vessels and epidermis, which can be explained by the NADPH oxidase activation by Ca. These results suggest that other sources different from NADPH oxidase can be involved in the Cd-dependent ROS production in mesophyll cells, such as peroxidases in the plasma membrane (Choi et al, 2007), the electron transport chain in mitochondria Garnier et al, 2006), glycolate oxidase in peroxisomes (Romero-Puertas et al, 1999, and chloroplasts (Azpilicueta et al, 2007). The protecting role of Ca can be also explained by the up-regulation of antioxidants such as CuZn-SOD.…”

Section: Induces Ros Accumulation and Reduction Of Nomentioning

confidence: 90%

Cellular Response of Pea Plants to Cadmium Toxicity: Cross Talk between Reactive Oxygen Species, Nitric Oxide, and Calcium

et al. 2009

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Cadmium (Cd) toxicity has been widely studied in different plant species; however, the mechanism involved in its toxicity as well as the cell response against the metal have not been well established. In this work, using pea (Pisum sativum) plants, we studied the effect of Cd on antioxidants, reactive oxygen species (ROS), and nitric oxide (NO) metabolism of leaves using different cellular, molecular, and biochemical approaches. The growth of pea plants with 50 mM CdCl 2 affected differentially the expression of superoxide dismutase (SOD) isozymes at both transcriptional and posttranscriptional levels, giving rise to a SOD activity reduction. The copper/zinc-SOD down-regulation was apparently due to the calcium (Ca) deficiency induced by the heavy metal. In these circumstances, the overproduction of the ROS hydrogen peroxide and superoxide could be observed in vivo by confocal laser microscopy, mainly associated with vascular tissue, epidermis, and mesophyll cells, and the production of superoxide radicals was prevented by exogenous Ca. On the other hand, the NO synthase-dependent NO production was strongly depressed by Cd, and treatment with Ca prevented this effect. Under these conditions, the pathogen-related proteins PrP4A and chitinase and the heat shock protein 71.2, were up-regulated, probably to protect cells against damages induced by Cd. The regulation of these proteins could be mediated by jasmonic acid and ethylene, whose contents increased by Cd treatment. A model is proposed for the cellular response to long-term Cd exposure consisting of cross talk between Ca, ROS, and NO.

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Section: Induces Ros Accumulation and Reduction Of Nomentioning

confidence: 90%

Cellular Response of Pea Plants to Cadmium Toxicity: Cross Talk between Reactive Oxygen Species, Nitric Oxide, and Calcium

et al. 2009

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“…OASTL catalyses the final step in cysteine biosynthesis and increases cysteine levels and cadmium tolerance in transformants (41). Cadmium was shown to regulate CAT at both transcriptional and posttranscriptional levels (48,46,1,49 activity was discarded because the incubation of commercial CAT with 100 μM cadmium did not produce any changes in enzyme activity (51). (55) report that peroxidase activities were increased in Spartina densiflora, Arachis hypogaea seedlings and Arabidopsis respectively even in low cadmium concentrations.…”

Section: Enzyme Analysismentioning

confidence: 99%

Effect of Cadmium onArabidopsis ThalianaMutants Tolerant to Oxidative Stress

Radeva

Petrov

Minkov

et al. 2010

Biotechnology & Biotechnological Equipment

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“…CAT isozymes have been studied comprehensively in higher plants (Polidoros and Scandalios, 1999) such as 2 for H. vulgare (Azevedo et al, 1998), 4 in Helianthus annuus cotyledons (Azpilicueta et al, 2007) and 12 in Brassica (Frugoli et al, 1996 ).…”

Section: -1-2-catalase (Cat)mentioning

confidence: 99%

Antioxidative responses to drought and salinity stress in plants, a comprehensive review

Saeidnejad¹,

Rajaei²

2015

Int J Life Sci

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Article InformationEnvironmental stresses are one of the most important reducing factor for plant's growth and productivity worldwide. Among them, salinity and drought are known as the most harmful. Reactive oxygen species (ROS) production is a frequent consequence of most stresses, including salinity and drought. These free radicals cause serious damages to plant's structure by oxidizing membrane lipids, proteins and nucleic acids. During the evolution process, plants acquire an antioxidative system consisting of nonenzymatic antioxidants, such as β-carotenes, ascorbic acid (AA), α-tocopherol (α-toc), and antioxidant enzymes, such as catalase (CAT), superoxide dismutase (SOD), and peroxidase (POX). Considering the fact that ROS production is an outcome of plant metabolism, controlling the ROS levels is highly vital for plant cells survive. There are considerable numbers of scientific researches regards to the antioxidative responses of plants grown under drought and salinity. These responses highly depend on plant species, other environmental conditions, growth stage and other factors. In this review, the biochemistry of enzymatic and non-enzymatic antioxidants and plant's antioxidative system changes in response to drought and salinity were expansively evaluated.

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Mechanism of CATA3 induction by cadmium in sunflower leaves

Cited by 50 publications

References 39 publications

Cellular Response of Pea Plants to Cadmium Toxicity: Cross Talk between Reactive Oxygen Species, Nitric Oxide, and Calcium

Cellular Response of Pea Plants to Cadmium Toxicity: Cross Talk between Reactive Oxygen Species, Nitric Oxide, and Calcium

Effect of Cadmium onArabidopsis ThalianaMutants Tolerant to Oxidative Stress

Antioxidative responses to drought and salinity stress in plants, a comprehensive review

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