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

BioMed Research International
Anisur RahmanMasayuki Fujita

Abstract

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 sativa L. cv. BRRI dhan29) seedlings were exposed to 0.5 and 1 mM Na2HAsO4 alone 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 seedli...Continue Reading

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Citations

Oct 13, 2016·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Anisur RahmanMasayuki Fujita
Sep 30, 2016·Frontiers in Plant Science·Tahsina S HoqueLam-Son P Tran
Jan 25, 2017·International Journal of Molecular Sciences·Mirza HasanuzzamanMasayuki Fujita
Aug 12, 2020·Environmental Science and Pollution Research International·Palin Sil, Asok K Biswas
Jun 6, 2020·Frontiers in Plant Science·Jacob R MacWilliamsIsgouhi Kaloshian
May 26, 2017·Environmental Science and Pollution Research International·Muhammad ShahidIrshad Bibi
Mar 12, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Arti GautamRama Shanker Dubey
Feb 19, 2021·Frontiers in Plant Science·Petr DvořákTomáš Takáč
Mar 13, 2021·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Tayebehalsadat MirmoeiniNaser Karimi
Jun 30, 2019·Ecotoxicology and Environmental Safety·Guotao DingWeihao Li
Jul 7, 2021·Physiologia Plantarum·Ravneet KaurHasthi Ram

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Methods Mentioned

BETA
environmental stress
AsA
MDA

Software Mentioned

XLSTAT

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