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
TLDR
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.Abstract:
The present study investigates the possible mediatory role of exogenously applied glycinebetaine (betaine) and proline on reactive oxygen species (ROS) and methylglyoxal (MG) detoxification systems in mung bean seedlings subjected to cadmium (Cd) stress (1 mM CdCl2, 48 h). Cadmium stress caused a significant increase in glutathione (GSH) and glutathione disulfide (GSSG) content, while the ascorbate (AsA) content decreased significantly with a sharp increase in hydrogen peroxide (H2O2) and lipid peroxidation level (MDA). Ascorbate peroxidase (APX), glutathione S-transferase (GST), glutathione peroxidase (GPX), and glyoxalase I (Gly I) activities were increased in response to Cd stress, while the activities of catalase (CAT), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), glutathione reductase (GR) and glyoxalase II (Gly II) were sharply decreased. Exogenous application of 5 mM betaine or 5 mM proline resulted in an increase in GSH and AsA content, maintenance of a high GSH/GSSG ratio and increased the activities of APX, DHAR, MDHAR, GR, GST, GPX, CAT, Gly I and Gly II involved in ROS and MG detoxification system as compared to the control and mostly also Cd-stressed plants, with a concomitant decrease in GSSG content, H2O2 and lipid peroxidation level. These findings together with our earlier findings suggest 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.read more
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Journal ArticleDOI
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
Mohammad Anwar Hossain,Mohammad Anwar Hossain,Pukclai Piyatida,Jaime A. Teixeira da Silva,Masayuki Fujita +4 more
TL;DR: 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.
Journal ArticleDOI
Hydrogen peroxide priming modulates abiotic oxidative stress tolerance: insights from ROS detoxification and scavenging.
Mohammad Anwar Hossain,Soumen Bhattacharjee,Saed-Moucheshi Armin,Pingping Qian,Wang Xin,Hongyu Li,David J. Burritt,Masayuki Fujita,Lam-Son Phan Tran +8 more
TL;DR: Current knowledge of the possible mechanisms associated with H2O2-induced abiotic oxidative stress tolerance in plants is reviewed, with special reference to antioxidant metabolism.
Book ChapterDOI
Plant Response and Tolerance to Abiotic Oxidative Stress: Antioxidant Defense Is a Key Factor
Mirza Hasanuzzaman,Mirza Hasanuzzaman,Mohammad Anwar Hossain,Jaime A. Teixeira da Silva,Masayuki Fujita +4 more
TL;DR: Recent researches on the mechanisms and possible regulatory roles of ROS in abiotic stress tolerance are summarized to discuss the progress made during the last few decades in improving the oxidative stress tolerance of plants through genetic engineering by different components of ROS detoxification systems in plants.
Journal ArticleDOI
Cadmium Toxicity in Plants and Role of Mineral Nutrients in Its Alleviation
TL;DR: The optimization of mineral nutrients under Cd stress could reduce Cd toxicity by greater availability at the transport site resulting in reduced accumulation of Cd, and could also alleviate Cd-induced toxic effects by enhancing biochemical reactions and physiological processes in plants.
Journal ArticleDOI
Heavy metal stress and responses in plants
Noor-Ul-Huda Ghori,T. Ghori,Muhammad Qasim Hayat,Sameen Ruqia Imadi,Alvina Gul,Volkan Altay,Munir Ozturk +6 more
TL;DR: The first line of defense provided by a plant is to reduce the uptake of metals when stimulated with toxicity of heavy metals and includes the help offered by cellular and root exudates that restricts metals from entering the cell as discussed by the authors.
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