scholarly journals Influence of Chelating Ligands on Arsenic Uptake by Hydroponically Grown Rice Seedlings (Oryza sativaL.): A Preliminary Study

2008 ◽  
Vol 36 (5-6) ◽  
pp. 521-527 ◽  
Author(s):  
Mohammad Azizur Rahman ◽  
Hiroshi Hasegawa ◽  
Kazumasa Ueda ◽  
Teruya Maki ◽  
M. Mahfuzur Rahman
Keyword(s):  
Chelating Ligands ◽  
Rice Seedlings ◽  
Arsenic Uptake ◽  
Preliminary Study ◽  
Hydroponically Grown

scholarly journals Calcium Mitigates Arsenic Toxicity in Rice Seedlings by Reducing Arsenic Uptake and Modulating the Antioxidant Defense and Glyoxalase Systems and Stress Markers

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Anisur Rahman ◽  
Mohammad Golam Mostofa ◽  
Md. Mahabub Alam ◽  
Kamrun Nahar ◽  
Mirza Hasanuzzaman ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Defense ◽  
Calcium Supplementation ◽  
Monodehydroascorbate Reductase ◽  
Rice Seedlings ◽  
Arsenic Uptake ◽  
Glyoxalase Ii ◽  
Stress Markers ◽  
As Stress ◽  
Hydroponically Grown

The effect of exogenous calcium (Ca) on hydroponically grown rice seedlings was studied under arsenic (As) stress by investigating the antioxidant and glyoxalase systems. Fourteen-day-old rice (Oryza sativaL. cv. BRRI dhan29) seedlings were exposed to 0.5 and 1 mM Na2HAsO4alone and in combination with 10 mM CaCl2(Ca) for 5 days. Both levels of As caused growth inhibition, chlorosis, reduced leaf RWC, and increased As accumulation in the rice seedlings. Both doses of As in growth medium induced oxidative stress through overproduction of reactive oxygen species (ROS) by disrupting the antioxidant defense and glyoxalase systems. Exogenous application of Ca along with both levels of As significantly decreased As accumulation and restored plant growth and water loss. Calcium supplementation in the As-exposed rice seedlings reduced ROS production, increased ascorbate (AsA) content, and increased the activities of monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), catalase (CAT), glutathione peroxidase (GPX), superoxide dismutase (SOD), and the glyoxalase I (Gly I) and glyoxalase II (Gly II) enzymes compared with seedlings exposed to As only. These results suggest that Ca supplementation improves rice seedlings tolerance to As-induced oxidative stress by reducing As uptake, enhancing their antioxidant defense and glyoxalase systems, and also improving growth and physiological condition.

Enhancing Grain Yield and Operational Feasibility by Transplanting Young Hydroponically Grown Long‐Mat Rice Seedlings

2019 ◽  
Vol 111 (5) ◽  
pp. 2303-2313
Author(s):  
Yuxiang Li ◽  
Honghai Luo ◽  
Yongan Yin ◽  
Shaohua Wang ◽  
Zhenghui Liu ◽  
...  
Keyword(s):  
Grain Yield ◽  
Rice Seedlings ◽  
Hydroponically Grown

Co-application of selenite and phosphate reduces arsenite uptake in hydroponically grown rice seedlings: Toxicity and defence mechanism

2013 ◽  
Vol 91 ◽  
pp. 171-179 ◽  
Author(s):  
Navin Kumar ◽  
Shekhar Mallick ◽  
Ram Nayan Yadava ◽  
Amit Pal Singh ◽  
Sarita Sinha
Keyword(s):  
Defence Mechanism ◽  
Rice Seedlings ◽  
Hydroponically Grown

scholarly journals A Comparative Study to Alleviate Arsenite Accumulation in Hydroponically Grown Oryza sativa Seedlings Through Combinations of Se, P and Fe

2019 ◽  
Vol 5 (04) ◽  
pp. 247-258
Author(s):  
Shekhar Mallick ◽  
Navin Kumar ◽  
Ruma Ranjan ◽  
Ambedkar Gautam ◽  
Sarita Sinha
Keyword(s):  
Oryza Sativa ◽  
Comparative Study ◽  
Growth Parameters ◽  
Rice Seedlings ◽  
Hydroponically Grown ◽  
H2o2 Level ◽  
Growth Of Seedlings

In the present study, the nine cultivars namely NDR-3112, Swarn Sub-2, Pusa-sugandha, IPB-1, Pant-4, Pant-10, Jalnidhi, Ushar-3 and Mashina Research-2 were screened to select the As tolerant cultivar. Based on accumulation and growth parameters, the tolerant cultivar (cv. Pant 10) of rice was selected for further experiments. Rice cv. Pant 10 was treated with i) As, ii) As+Fe, iii) As+Se, iv) As+Se+P and v) As+P under hydroponic condition for 8d. The application (μg ml-1) of Fe(100) to As(4) and Se(4)+P(6) to As(4), significantly (89% and 73%, respectively) reduced the uptake of As to the shoot without affecting the growth of seedlings. However, increasing the level of P (3 and 6 μg ml-1) alone in As(III) (4 μg ml-1) treatments significantly increased the As accumulation in the shoot, coincided with the decreased growth of rice seedlings. Treatment of As+Fe showed a non-significant reduction in growth relative to As alone, whereas, the seedlings exhibited the higher MDA and H2O2 level at 100 μg ml-1 concentration of Fe. In comparison to Se and P combinations, the Fe was found to be more efficient to significantly reduce the As accumulation. Among all the antioxidants, the activity of SOD and APX was significantly enhanced with the As+Fe(50) at both 4 and 8 days of treatments against As(4). Overall results demonstrate that the application of Fe was more efficient to reduce the uptake of As than Se and P in the rice seedlings.

Effects of root anatomy and Fe plaque on arsenic uptake by rice seedlings grown in solution culture

2010 ◽  
Vol 158 (8) ◽  
pp. 2589-2595 ◽  
Author(s):  
Dan Deng ◽  
Sheng-Chun Wu ◽  
Fu-Yong Wu ◽  
Hong Deng ◽  
Ming-Hung Wong
Keyword(s):  
Solution Culture ◽  
Root Anatomy ◽  
Rice Seedlings ◽  
Arsenic Uptake ◽  
Fe Plaque

scholarly journals Effect of Endogenous Selenium on Arsenic Uptake and Antioxidative Enzymes in As-Exposed Rice Seedlings

2019 ◽  
Vol 16 (18) ◽  
pp. 3350 ◽  
Author(s):  
Aboubacar Younoussa Camara ◽  
Yanan Wan ◽  
Yao Yu ◽  
Qi Wang ◽  
Kang Wang ◽  
...  
Keyword(s):  
Superoxide Dismutase ◽  
Human Health ◽  
Oryza Sativa L ◽  
Human Consumption ◽  
Rice Seedlings ◽  
Simultaneous Application ◽  
Arsenic Uptake ◽  
Rice Roots ◽  
Mda Content ◽  
As Toxicity

Arsenic (As) and selenium (Se) are two metalloids found in the environment. As it poses a significant threat to human health and plant growth due to its prevalence and toxicity, however Se is a required micronutrient for human health. In this study hydroponic experiments were performed to investigate whether endogenous Se can mitigate As toxicity in rice (Oryza sativa L.). We found that As uptake by rice roots increased by pretreatment with selenateSe(VI) or selenite Se(IV). However, co-application of arsenate As(V) or arsenite As(III) with selenate markedly reduced the uptake of As by roots. Co- or pretreatment with Se with five µM of As(V) or one µM of As(III) significantly decreased shoot As content. Conversely, Se pretreatment before the addition of five µM of As(III) or one µM of As(V) resulted in As accumulation in the shoot compared to As and Se co-application. As translocation to the shoot was lower whereas the transfer factor was higher upon the simultaneous application of Se and As compared to Se pretreatment. Se supplementation with As(III) or pretreatment increased antioxidant enzymes: Superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) increased in the root and shoot, but decreased glutathione (GSH) and malondialdehyde (MDA) contents in the shoot. Plants under As(V) treatment showed the same trend except that CAT content decreased in the root and shoot, while MDA content increased in the shoot. These results suggest that cultivating rice in the presence of Se can reduce the accumulation of toxic As in seedlings, thus ensuring the safety of this important crop for human consumption.

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