The effects of Se phytotoxicity on the antioxidant systems of leaf tissues in barley (Hordeum vulgare L.) seedlings |
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| Authors: | Mikail Akbulut Selcen Çak?r |
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| Institution: | 1. Department of Botany, Government College University, Faisalabad 38000, Pakistan;2. Wheat Research Institute, Ayub Agricultural Research Institute (AARI), Faisalabad, Pakistan;1. Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China;2. Agricultural Technology Extension Center, Zhejiang University, Hangzhou 310058, China;3. Agricultural Experiment Station, Zhejiang University, Hangzhou 310058, China;4. College of Plant Science, Tarim University, Alar, Xinjiang 843300, China;1. Department of Soil Science, Federal University of Lavras, Postal Code 3037, 37200-000 Lavras, MG, Brazil;2. Federal Institute of Education, Science and Technology of Sertão of Pernambuco, Postal Code 56304-060, Petrolina, PE, Brazil;3. Department of Food Science, Federal University of Lavras, Postal Code 3037, 37200-000 Lavras, MG, Brazil;4. Department of Engineering, Federal University of Lavras, Postal Code 3037, 37200-000 Lavras, MG, Brazil;5. Department of Biology, Federal University of Lavras, Postal Code 3037, 37200-000 Lavras, MG, Brazil;6. School of Science and Engineering, São Paulo State University - UNESP, Postal Code 17602-496, Tupã, SP, Brazil;1. Department of Biology, Erciyes University, Melikgazi 38039, Kayseri, Turkey;2. Department of Horticulture, Erciyes University, Melikgazi 38039, Kayseri, Turkey;3. Department of Horticulture, Cukurova University, Balcali 01330, Adana, Turkey |
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| Abstract: | A hydroponic experiment was carried out in a growth chamber to investigate the impact of Selenium (Se) levels on physiological and biochemical characteristics of a barley cultivar. Membrane lipid peroxidation (LPO), proline accumulation and antioxidant activities of some enzymes of barley seedlings under Se toxicity were investigated. Significant increase in thiobarbituric acid reactive substance (TBARS) content, and a stimulation of catalase (CAT, 1.11.1.6), ascorbate peroxidase (APX, 1.11.1.11), glutathione reductase (GR, 1.6.4.2), and glutathione S-transferase (GST, 2.5.1.18) activities were recorded in barley seedlings subjected to 2, 4, 8, 16 ppm Se. Superoxide dismutase (SOD, EC 1.15.1.1) activity was not altered significantly. Plant height and chlorophyll content of the seedlings were also affected significantly in a dose dependent manner by Se treatment. Considerable amount of proline accumulation was also observed in response to Se treatment. The results indicated that increases in the activities of the antioxidant enzymes were not sufficient to protect cell membrane against Se toxicity. |
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