scholarly journals Evaluating the Toxic Impacts of Cadmium Selenide Nanoparticles on the Aquatic Plant Lemna minor

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 410 ◽  
Author(s):  
Roshanak Tarrahi ◽  
Ali Movafeghi ◽  
Alireza Khataee ◽  
Farkhondeh Rezanejad ◽  
Gholamreza Gohari
Keyword(s):  
Reactive Oxygen Species ◽  
Cadmium Selenide ◽  
Aquatic Plant ◽  
Lemna Minor ◽  
Ionic Form ◽  
Morphological Parameters ◽  
Oxygen Species ◽  
Defense System ◽  
Simple Method ◽  
Cadmium Selenide Nanoparticles

Cadmium selenide nanoparticles (CdSe NPs) were synthesized by an easy and simple method and their properties were assessed by XRD, TEM and SEM techniques. The effects of CdSe NPs as well as Cd2+ ions on Lemna minor plants were investigated. The absorption of CdSe NPs by the plants had some adverse consequences that were assessed by a range of biological analyses. The results revealed that both CdSe NPs and the ionic form of cadmium noticeably caused toxicity in L. minor. Morphological parameters as well as peroxidase (POD) activity were deteriorated. In contrast, the activities of some other antioxidant enzymes (superoxide dismutase (SOD) and catalase (CAT)) as well as the contents of total phenol and flavonoids went up. Taken all together, it could be implied that CdSe NPs as well as Cd2+ were highly toxic to plants and stimulated the plant defense system in order to scavenge produced reactive oxygen species (ROS).

Iron oxide nanoparticle phytotoxicity to the aquatic plant Lemna minor: effect on reactive oxygen species (ROS) production and chlorophyll a/chlorophyll b ratio

2019 ◽  
Vol 26 (23) ◽  
pp. 24121-24131 ◽  
Author(s):  
Lilian Rodrigues Rosa Souza ◽  
Luís Eduardo Bernardes ◽  
Maike Felipe Santos Barbetta ◽  
Márcia Andreia Mesquita Silva da Veiga
Keyword(s):  
Reactive Oxygen Species ◽  
Iron Oxide ◽  
Aquatic Plant ◽  
Lemna Minor ◽  
Iron Oxide Nanoparticle ◽  
Minor Effect ◽  
Ros Production ◽  
Oxygen Species ◽  
Chlorophyll B ◽  
Oxide Nanoparticle

Oxidative Stress in Critically Ill Patients

2002 ◽  
Vol 11 (6) ◽  
pp. 543-551 ◽  
Author(s):  
Caryl Goodyear-Bruch ◽  
Janet D. Pierce
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Superoxide Dismutase ◽  
Free Radicals ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Oxygen Free Radicals ◽  
Oxygen Species ◽  
Defense System ◽  
Oxygen Derived Free Radicals

Oxygen-derived free radicals play an important role in the development of disease in critically ill patients. Normally, oxygen free radicals are neutralized by antioxidants such as vitamin E or enzymes such as superoxide dismutase. However, in patients who require intensive care, oxygen free radicals become a problem when either a decrease in the removal or an overproduction of the radicals occurs. This oxidative stress and the damage due to it have been implicated in many diseases in critically ill patients. Many drugs and treatments now being investigated are directed toward preventing the damage from oxidative stress. The formation of reactive oxygen species, the damage caused by them, and the body’s defense system against them are reviewed. New interventions are described that may be used in critically ill patients to prevent or treat oxidative damage.

scholarly journals Molecular Mechanism of Heavy Metal Toxicity and Tolerance in Plants: Central Role of Glutathione in Detoxification of Reactive Oxygen Species and Methylglyoxal and in Heavy Metal Chelation

2012 ◽  
Vol 2012 ◽  
pp. 1-37 ◽  
Author(s):  
Mohammad Anwar Hossain ◽  
Pukclai Piyatida ◽  
Jaime A. Teixeira da Silva ◽  
Masayuki Fujita
Keyword(s):  
Reactive Oxygen Species ◽  
Heavy Metal ◽  
Antioxidant Defense ◽  
Plant Cells ◽  
Reactive Oxygen ◽  
Antioxidant Defense System ◽  
Peroxidation Of Lipids ◽  
Oxygen Species ◽  
Defense System ◽  
Glyoxalase System

Heavy metal (HM) toxicity is one of the major abiotic stresses leading to hazardous effects in plants. A common consequence of HM toxicity is the excessive accumulation of reactive oxygen species (ROS) and methylglyoxal (MG), both of which can cause peroxidation of lipids, oxidation of protein, inactivation of enzymes, DNA damage and/or interact with other vital constituents of plant cells. Higher plants have evolved a sophisticated antioxidant defense system and a glyoxalase system to scavenge ROS and MG. In addition, HMs that enter the cell may be sequestered by amino acids, organic acids, glutathione (GSH), or by specific metal-binding ligands. Being a central molecule of both the antioxidant defense system and the glyoxalase system, GSH is involved in both direct and indirect control of ROS and MG and their reaction products in plant cells, thus protecting the plant from HM-induced oxidative damage. Recent plant molecular studies have shown that GSH by itself and its metabolizing enzymes—notably glutathione S-transferase, glutathione peroxidase, dehydroascorbate reductase, glutathione reductase, glyoxalase I and glyoxalase II—act additively and coordinately for efficient protection against ROS- and MG-induced damage in addition to detoxification, complexation, chelation and compartmentation of HMs. The aim of this review is to integrate a recent understanding of physiological and biochemical mechanisms of HM-induced plant stress response and tolerance based on the findings of current plant molecular biology research.

scholarly journals Similar Stress Responses are Elicited by Copper and Ultraviolet Radiation in the Aquatic Plant Lemna gibba: Implication of Reactive Oxygen Species as Common Signals

2003 ◽  
Vol 44 (12) ◽  
pp. 1320-1329 ◽  
Author(s):  
T. Sudhakar Babu ◽  
Tariq A. Akhtar ◽  
Mark A. Lampi ◽  
Sridevi Tripuranthakam ◽  
D. George Dixon ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Ultraviolet Radiation ◽  
Stress Responses ◽  
Aquatic Plant ◽  
Reactive Oxygen ◽  
Lemna Gibba ◽  
Oxygen Species

scholarly journals Regulation of Reactive Oxygen Species and Antioxidant Defense in Plants under Salinity

2021 ◽  
Vol 22 (17) ◽  
pp. 9326
Author(s):  
Mirza Hasanuzzaman ◽  
Md. Rakib Hossain Raihan ◽  
Abdul Awal Chowdhury Masud ◽  
Khussboo Rahman ◽  
Farzana Nowroz ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Salt Stress ◽  
Oxidative Damage ◽  
Antioxidant Defense ◽  
Reactive Oxygen ◽  
Antioxidant Defense System ◽  
Ros Generation ◽  
Oxygen Species ◽  
Defense System

The generation of oxygen radicals and their derivatives, known as reactive oxygen species, (ROS) is a part of the signaling process in higher plants at lower concentrations, but at higher concentrations, those ROS cause oxidative stress. Salinity-induced osmotic stress and ionic stress trigger the overproduction of ROS and, ultimately, result in oxidative damage to cell organelles and membrane components, and at severe levels, they cause cell and plant death. The antioxidant defense system protects the plant from salt-induced oxidative damage by detoxifying the ROS and also by maintaining the balance of ROS generation under salt stress. Different plant hormones and genes are also associated with the signaling and antioxidant defense system to protect plants when they are exposed to salt stress. Salt-induced ROS overgeneration is one of the major reasons for hampering the morpho-physiological and biochemical activities of plants which can be largely restored through enhancing the antioxidant defense system that detoxifies ROS. In this review, we discuss the salt-induced generation of ROS, oxidative stress and antioxidant defense of plants under salinity.

Sign in / Sign up

Export Citation Format

Share Document