Comparative effects of ascobin and glutathione on copper homeostasis and oxidative stress metabolism in mitigation of copper toxicity in rice.

Autor: Tahjib-Ul-Arif M; Department of Biochemistry and Molecular Biology, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh.; Graduate School of Environmental and Life Science, Okayama University, Kita-ku, Okayama, 700-8530, Japan., Sohag AAM; Department of Biochemistry and Molecular Biology, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh., Mostofa MG; Department of Biochemistry and Molecular Biology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, 1706, Bangladesh., Polash MAS; Department of Crop Botany, Khulna Agricultural University, Khulna, 9202, Bangladesh., Mahamud AGMSU; School of Food Science and Engineering, South China University of Technology, Guangzhou, 510641, China., Afrin S; Graduate School of Environmental and Life Science, Okayama University, Kita-ku, Okayama, 700-8530, Japan., Hossain MA; Department of Crop Botany, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh., Hossain MA; Department of Biochemistry and Molecular Biology, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh., Murata Y; Graduate School of Environmental and Life Science, Okayama University, Kita-ku, Okayama, 700-8530, Japan., Tran LP; Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam.; Stress Adaptation Research Unit, RIKEN Center for Sustainable Resource Science, Yokohama, 230-0045, Japan.
Jazyk: angličtina
Zdroj: Plant biology (Stuttgart, Germany) [Plant Biol (Stuttg)] 2021 May; Vol. 23 Suppl 1, pp. 162-169. Date of Electronic Publication: 2021 Jan 07.
DOI: 10.1111/plb.13222
Abstrakt: Copper (Cu) pollution of agricultural land is a major threat to crop production. Exogenous chemical treatment is an easily accessible and rapid approach to remediate metal toxicity, including Cu toxicity in plants. We compared the effects of ascobin (ASC; ascorbic acid:citric acid at 2:1) and glutathione (GSH) in mitigation of Cu toxicity in rice. Plants subjected to Cu stress displayed growth inhibition and biomass reduction, which were connected to reduced levels of chlorophylls, RWC, total phenolic compounds, carotenoids and Mg 2+ . Increased accumulation of ROS and malondialdehyde indicated oxidative stress in Cu-stressed plants. However, application of ASC or GSH minimized the inhibitory effects of Cu stress on rice plants by restricting Cu 2+ uptake and improving mineral balance, chlorophyll content and RWC. Both ASC and GSH pretreatments reduced levels of ROS and malondialdehyde and improved activities of antioxidant enzymes, suggesting their roles in alleviating oxidative damage. A comparison on the effects of ASC and GSH under Cu stress revealed that ASC was more effective in restricting Cu 2+ accumulation (69.5% by ASC and 57.1% by GSH), Ca 2+ and Mg 2+ homeostasis, protection of photosynthetic pigments and activation of antioxidant defence mechanisms [catalase (110.4%), ascorbate peroxidase (76.5%) and guaiacol peroxidase (39.0%) by ASC, and catalase (58.9%) and ascorbate peroxidase (59.9%) by GSH] in rice than GSH, eventually resulting in better protection of ASC-pretreated plants against Cu stress. In conclusion, although ASC and GSH differed in induction of stress protective mechanisms, both were effective in improving rice performance in response to Cu phytotoxicity.
(© 2020 German Society for Plant Sciences and The Royal Botanical Society of the Netherlands.)
Databáze: MEDLINE
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