Seed Priming with Selenium: Consequences for Emergence, Seedling Growth, and Biochemical Attributes of Rice

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• 作者：Abdul Khaliq ; Farhena Aslam ; Amar Matloob…
• 关键词：α ; Amylase ; Antioxidants ; Basmati rice ; Selenium priming ; Soluble sugars
• 刊名：Biological Trace Element Research
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：166
• 期：2
• 页码：236-244
• 全文大小：357 KB
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• 作者单位：Abdul Khaliq (1)
  Farhena Aslam (1)
  Amar Matloob (1) (2)
  Saddam Hussain (1) (3) (4)
  Mingjian Geng (4)
  Abdul Wahid (5)
  Hafeez ur Rehman (6)
  
  1. Department of Agronomy, University of Agriculture, Faisalabad, Pakistan
  2. Department of Agronomy, Muhammad Nawaz Shareef University of Agriculture, Multan, Pakistan
  3. College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
  4. College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
  5. Department of Botany, University of Agriculture, Faisalabad, Pakistan
  6. Department of Crop Physiology, University of Agriculture, Faisalabad, Pakistan
  
• 刊物主题：Biochemistry, general; Biotechnology; Nutrition; Oncology;
• 出版者：Springer US
• ISSN：1559-0720

文摘

The present study was undertaken to appraise the role of selenium priming for improving emergence and seedling growth of basmati rice. Seeds of two fine rice cultivars (Super and Shaheen Basmati) were primed with concentrations of 15, 30, 45, 60, 75, 90, and 105?μmol?L? selenium. Untreated dry- and hydro-primed seeds were maintained as the control and positive control, respectively. Selenium priming resulted in early commencement of emergence, triggered seedling growth irrespective of rice cultivar over untreated control, and was more effective than hydro-priming except at higher concentrations. Lower electrical conductivity of seed leachates, reduced lipid peroxidation, greater α-amylase activity, higher soluble sugars, and enhanced activities of enzymatic antioxidants (superoxide dismutase (SOD), peroxidase (POX), catalase (CAT), and glutathione peroxidase (GPX)) were observed in seeds primed with selenium. Rice seedlings derived from selenium-primed seeds exhibited more chlorophyll contents, while total phenolics were comparable with those of the control seedlings. The improved starch metabolism, greater membrane stability, and increased activity of antioxidants were considered as possible mechanisms responsible for such improvements in emergence and seedling vigor of rice mediated by selenium priming. Priming with selenium (15-0?μmol?L?) favored rice emergence and seedling growth. Nevertheless, soaking seeds in relatively concentrated (90 and 105?μmol?L?) selenium solution had overall detrimental effects.