Journal ArticleDOI
Acquired tolerance of tomato (Lycopersicon esculentum cv. Micro‐Tom) plants to cadmium‐induced stress
Priscila Lupino Gratão,Carolina C. Monteiro,A.M. Antunes,Lázaro Eustáquio Pereira Peres,Ricardo Antunes Azevedo +4 more
TLDR
The effects of varying concentrations of cadmium (Cd) on the development of Lycopersicon esculentum cv.Abstract:
The effects of varying concentrations of cadmium (Cd) on the development of Lycopersicon esculentum cv. Micro-Tom (MT) plants were investigated after 40 days (vegetative growth) and 95 days (fruit production), corresponding to 20 days and 75 days of exposure to CdCl 2 , respectively. Inhibition of growth was clearly observed in the leaves after 20 days and was greater after 75 days of growth in 1 mM CdCl 2 , whereas the fruits exhibited reduced growth following the exposure to a concentration as low as 0.1 mM CdCl 2 . Cd was shown to accumulate in the roots after 75 days of growth but was mainly translocated to the upper parts of the plants accumulating to high concentrations in the fruits. Lipid peroxidation was more pronounced in the roots even at 0.05 mM CdCl 2 after 75 days, whereas in leaves, there was a major increase after 20 days of exposure to 1 mM CdCl 2 , but the fruit only exhibited a slight significant increase in lipid peroxidation in plants subjected to 1 mM CdCl 2 when compared with the control. Oxidative stress was also investigated by the analysis of four key antioxidant enzymes, which exhibited changes in response to the increasing concentrations of Cd tested. Catalase (EC 1.11.1.6) activity was shown to increase after 75 days of Cd treatment, but the major increases were observed at 0.1 and 0.2 mM CdCl 2 , whereas guaiacol peroxidase (EC 1.11.1.7) did not vary significantly from the control in leaves and roots apart from specific changes at 0.5 and 1 mM CdCl 2 . The other two enzymes tested, glutathione reductase (EC 1.6.4.2) and superoxide dismutase (SOD, EC 1.15.1.1), did not exhibit any significant changes in activity, apart from a slight decrease in SOD activity at concentrations above 0.2 mM CdCl 2 . However, the most striking results were obtained when an extra treatment was used in which a set of plants was subjected to a stepwise increase in CdCl 2 from 0.05 to 1 mM, leading to tolerance of the Cd applied even at the final highest concentration of 1 mM. This apparent adaptation to the toxic effect of Cd was confirmed by biomass values being similar to the control, indicating a tolerance to Cd acquired by the MT plants.read more
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Journal ArticleDOI
Unravelling cadmium toxicity and tolerance in plants: Insight into regulatory mechanisms
Susana M. Gallego,Susana M. Gallego,Liliana B. Pena,Liliana B. Pena,Roberto A. Barcia,Claudia E. Azpilicueta,María Florencia Iannone,María Florencia Iannone,Eliana Paola Rosales,Eliana Paola Rosales,Myriam Sara Zawoznik,María Daniela Groppa,María Daniela Groppa,Maria Patricia Benavides,Maria Patricia Benavides +14 more
TL;DR: This article reviews current knowledge of uptake, transport and accumulation of Cd in plants and gives an overview of C d-detoxification mechanisms, Cd-induced oxidative damage and antioxidant defenses in plants, and presents a picture of the role of reactive oxygen and nitrogen species in Cd toxicity.
Journal ArticleDOI
Up-regulation of antioxidant and glyoxalase systems by exogenous glycinebetaine and proline in mung bean confer tolerance to cadmium stress
Mohammad Anwar Hossain,Mohammad Anwar Hossain,Mirza Hasanuzzaman,Mirza Hasanuzzaman,Masayuki Fujita +4 more
TL;DR: It is suggested that both betaine and proline provide a protective action against Cd-induced oxidative stress by reducing H2O2 and lipid peroxidation levels and by increasing the antioxidant defense and MG detoxification systems.
Journal ArticleDOI
A critical review on effects, tolerance mechanisms and management of cadmium in vegetables.
Muhammad Rizwan,Shafaqat Ali,Muhammad Adrees,Muhammad Ibrahim,Daniel C.W. Tsang,Muhammad Zia-ur-Rehman,Zahir Ahmad Zahir,Jörg Rinklebe,Filip Tack,Yong Sik Ok +9 more
TL;DR: The use of low Cd accumulating vegetable cultivars in conjunction with insolubilizing amendments and proper agricultural practices might be a useful technique for reducing Cd exposure in the food chain.
Journal ArticleDOI
Selenium improves the antioxidant ability against aluminium-induced oxidative stress in ryegrass roots
TL;DR: Evidence is provided that Se alleviated the Al-induced oxidative stress in ryegrass roots through the enhancement of the spontaneous dismutation of superoxide radicals and the subsequent activation of POD enzyme.
Journal ArticleDOI
Toxicity of heavy metals and metal-containing nanoparticles on plants.
Ghazala Mustafa,Setsuko Komatsu +1 more
TL;DR: The role of different metal chelators involved in the detoxification and sequestration of heavy metals is critically reviewed, and changes in protein profiles of plants exposed to metal-containing nanoparticles are discussed in detail.
References
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Journal ArticleDOI
A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding
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Journal ArticleDOI
Photoperoxidation in isolated chloroplasts. I. Kinetics and stoichiometry of fatty acid peroxidation.
Robert L. Heath,Lester Packer +1 more
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Oxidative Modifications to Cellular Components in Plants
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Journal ArticleDOI
Making the life of heavy metal-stressed plants a little easier
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Journal ArticleDOI
Cadmium toxicity in plants
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