Exogenous calcium alleviates cadmium-induced oxidative stress in rice (Oryza sativa L.) seedlings by regulating the antioxidant defense and glyoxalase systems

2015 ◽  
Vol 39 (2) ◽  
pp. 393-407 ◽  
Author(s):  
Anisur Rahman ◽  
Mohammad Golam Mostofa ◽  
Kamrun Nahar ◽  
Mirza Hasanuzzaman ◽  
Masayuki Fujita
Keyword(s):  
Oxidative Stress ◽  
Oryza Sativa ◽  
Antioxidant Defense ◽  
Oryza Sativa L ◽  
Exogenous Calcium

scholarly journals Reactive Oxygen Species (ROS) Metabolism and Nitric Oxide (NO) Content in Roots and Shoots of Rice (Oryza sativa L.) Plants under Arsenic-Induced Stress

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1014 ◽  
Author(s):  
Ernestina Solórzano ◽  
Francisco J. Corpas ◽  
Salvador González-Gordo ◽  
José M. Palma
Keyword(s):  
Oxidative Stress ◽  
Nitric Oxide ◽  
Reactive Oxygen Species ◽  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Antioxidative Systems ◽  
Ros Metabolism ◽  
As Stress

Arsenic (As) is a highly toxic metalloid for all forms of life including plants. Rice is the main food source for different countries worldwide, although it can take up high amounts of As in comparison with other crops, showing toxic profiles such as decreases in plant growth and yield. The induction of oxidative stress is the main process underlying arsenic toxicity in plants, including rice, due to an alteration of the reactive oxygen species (ROS) metabolism. The aim of this work was to gain better knowledge on how the ROS metabolism and its interaction with nitric oxide (NO) operate under As stress conditions in rice plants. Thus, physiological and ROS-related biochemical parameters in roots and shoots from rice (Oryza sativa L.) were studied under 50 μM arsenate (AsV) stress, and the involvement of the main antioxidative systems and NO in the response of plants to those conditions was investigated. A decrease of 51% in root length and 27% in plant biomass was observed with 50 μM AsV treatment, as compared to control plants. The results of the activity of superoxide dismutase (SOD) isozymes, catalase, peroxidase (POD: total and isoenzymatic), and the enzymes of the ascorbate–glutathione cycle, besides the ascorbate and glutathione contents, showed that As accumulation provoked an overall significant increase of most of them, but with different profiles depending on the plant organ, either root or shoot. Among the seven identified POD isozymes, the induction of the POD-3 in shoots under As stress could help to maintain the hydrogen peroxide (H2O2) redox homeostasis and compensate the loss of the ascorbate peroxidase (APX) activity in both roots and shoots. Lipid peroxidation was slightly increased in roots and shoots from As-treated plants. The H2O2 and NO contents were enhanced in roots and shoots against arsenic stress. In spite of the increase of most antioxidative systems, a mild oxidative stress situation appears to be consolidated overall, since the growth parameters and those from the oxidative damage could not be totally counteracted. In these conditions, the higher levels of H2O2 and NO suggest that signaling events are simultaneously occurring in the whole plant.

Silicon-induced antioxidant defense and methylglyoxal detoxification works coordinately in alleviating nickel toxicity in Oryza sativa L.

Ecotoxicology ◽  
2019 ◽  
Vol 28 (3) ◽  
pp. 261-276 ◽  
Author(s):  
Mirza Hasanuzzaman ◽  
Md. Mahabub Alam ◽  
Kamrun Nahar ◽  
Sayed Mohammad Mohsin ◽  
M. H. M. Borhannuddin Bhuyan ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Antioxidant Defense ◽  
Oryza Sativa L ◽  
Nickel Toxicity

Selenium ameliorates arsenic induced oxidative stress through modulation of antioxidant enzymes and thiols in rice (Oryza sativa L.)

Ecotoxicology ◽  
2014 ◽  
Vol 23 (7) ◽  
pp. 1153-1163 ◽  
Author(s):  
Amit Kumar ◽  
Rana Pratap Singh ◽  
Pradyumna Kumar Singh ◽  
Surabhi Awasthi ◽  
Debasis Chakrabarty ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Oryza Sativa ◽  
Antioxidant Enzymes ◽  
Oryza Sativa L

Effects of titanium oxide nanoparticles on tetracycline accumulation and toxicity in Oryza sativa (L.)

2017 ◽  
Vol 4 (9) ◽  
pp. 1827-1839 ◽  
Author(s):  
Chuanxin Ma ◽  
Hong Liu ◽  
Guangcai Chen ◽  
Qing Zhao ◽  
Brian Eitzer ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Titanium Oxide ◽  
Defense Mechanisms ◽  
Antioxidant Defense ◽  
Oryza Sativa L ◽  
Oxide Nanoparticles ◽  
Rice Seedlings ◽  
Titanium Oxide Nanoparticles

TiO2NPs antagonistically alleviated the toxicity of TC to rice seedlings and plant antioxidant defense mechanisms activated by both contaminants.

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