24-Epibrassinolide pre-treatment reduces alkaline-induced oxidative stress in red rice seedlings.

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ID: 62317
2019
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Abstract
Soil alkalinity caused by salts, such as sodium bicarbonate (NaHCO), and the frequently associated waterlogging problems are pervasive in agriculture and have a deleterious impact on crop production. However, various plant growth regulators, including brassinosteroids, are considered to be important against different abiotic stresses experienced by plants due to drought, salinity, and heavy metal stress. We investigated the putative role of 24-epibrassinolide (EBL), an active brassinosteroid, on red rice plants experiencing alkaline stress. Seedlings were pre-treated with 0.01 μM EBL for 30 min and later, exposed to NaHCO (25 mM) and were sampled, 5 days after treatments. Results showed that the pre-treatment of seedlings with EBL under non-stress conditions could promote rice plant growth. Growth parameters including dry weight (DW), root and coleoptile lengths were reduced under alkaline stress, whereas EBL application reduced the level of inhibition, as compared with NaHCO treatment. Enhanced levels of malondialdehyde content, hydrogen peroxide, and superoxide radicals were significantly diminished by EBL pre-treatment. Moreover, pre-treatment of EBL to alkaline-treated rice seedlings largely stimulated the enzymatic activities of ascorbate peroxidase, catalase, and superoxide dismutase. Thus, the results suggest that pre-application of EBL significantly ameliorates alkaline stress in rice.
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sharma201924epibrassinolideenvironmental Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Sharma, Mansi;Mahajan, Priyanka;Singh, Harminder Pal;Batish, Daizy Rani;Kohli, Ravinder Kumar;
Journal Environmental science and pollution research international
Year 2019
DOI
10.1007/s11356-019-05474-7
URL
Keywords
antioxidant enzymes lipid peroxidation sodium bicarbonate stress amelioration superoxide anion

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