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- Title
Exogenous proline enhances antioxidant enzyme activities but does not mitigate growth inhibition by selenate stress in tobacco BY-2 cells.
- Authors
Khatun, Mousumi; Matsushima, Daiki; Rhaman, Mohammad Saidur; Okuma, Eiji; Nakamura, Toshiyuki; Nakamura, Yoshimasa; Munemasa, Shintaro; Murata, Yoshiyuki
- Abstract
Selenium (Se) causes oxidative damage to plants. Proline is accumulated as a compatible solute in plants under stress conditions and mitigates stresses. Selenate at 250 µM increased cell death and inhibited the growth of tobacco BY-2 cells while exogenous proline at 10 mM did not mitigate the inhibition by selenate. Selenate increased accumulation of Se and ROS and activities of antioxidant enzymes but not lipid peroxidation in the BY-2 cells. Proline increased Se accumulation and antioxidant enzyme activities but not either ROS accumulation or lipid peroxidation in the selenate-stressed cells. Glutathione (GSH) rather than ascorbic acid (AsA) mitigated the growth inhibition although both reduced the accumulation of ROS induced by selenate. These results indicate that proline increases both antioxidant enzyme activities and Se accumulation, which overall fails to ameliorate the growth inhibition by selenate and that the growth inhibition is not accounted for only by ROS accumulation. Abbreviations: APX: ascorbate peroxidase; AsA: ascorbic acid; BY-2: Bright Yellow-2; CAT: catalase; DAI: days after inoculation; DW: dry weight; FW: fresh weight; GSH: glutathione; ROS: reactive oxygen species Exogenous application of proline does not mitigate the growth inhibition by selenate and the growth inhibition by selenate is not accounted for by ROS accumulation.
- Subjects
GLUTATHIONE peroxidase; REACTIVE oxygen species; PROLINE; ENZYMES; CELL death inhibition; CATALASE; VITAMIN C; GLUTATHIONE
- Publication
Bioscience, Biotechnology & Biochemistry, 2020, Vol 84, Issue 11, p2281
- ISSN
0916-8451
- Publication type
Article
- DOI
10.1080/09168451.2020.1799747