Pretreatment with salicylic acid and ascorbic acid significantly mitigate oxidative stress induced by copper in cotton genotypes

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• 作者：Lei Mei ; M. K. Daud ; Najeeb Ullah…
• 关键词：Antioxidative metabolism ; Ascorbic acid ; Cu detoxification ; Growth inhibition ; Lipid peroxidation ; Salicylic acid ; Upland cotton
• 刊名：Environmental Science and Pollution Research
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：22
• 期：13
• 页码：9922-9931
• 全文大小：721 KB
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• 作者单位：Lei Mei (1)
  M. K. Daud (1) (2)
  Najeeb Ullah (1) (3)
  Shafaqat Ali (1) (4)
  Mumtaz Khan (1)
  Zaffar Malik (5)
  S. J. Zhu (1)
  
  1. Institute of Crop Science, Department of Agronomy, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou, People’s Republic of China
  2. Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology, Kohat, 26000, Pakistan
  3. Department of Plant Breeding and Genetics, Faculty of Agriculture and Environment, The University of Sydney, Sydney, NSW, 2015, Australia
  4. Department of Environmental Sciences, Government College University Faisalabad, Faisalabad, 38000, Pakistan
  5. Department of Soil Science, College of Environment and Resource Sciences, Zijingang Campus, Zhejiang University, Hangzhou, People’s Republic of China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

Higher uptake and translocation of copper (Cu) into plant tissues can cause serious physiological and biochemical alterations in root and leaf tissues of plants. The present study investigates the ameliorative role of salicylic acid (SA) and ascorbic acid (AsA) against Cu-induced toxicity changes in cotton genotypes (two parental lines (J208, Z905) and their hybrid line (ZD14)). To study the tolerance potential against Cu (100?μM) stress, 2-week-old cotton seedlings were pretreated with 100?μM either SA or AsA for three days. Elevated Cu concentration in nutrient media increased Cu accumulation in roots and shoots of all the three cotton genotypes studied. Roots were the main Cu storage site, followed by leaves and stems. Increased cellular Cu concentration significantly inhibited the root and shoot development, although leaf growth was more sensitive toward Cu toxicity. Cu-induced oxidative stress to cotton leaves was evident from significantly increased hydrogen peroxide (H2O2) contents and lipid membrane damage. Increasing Cu translocation toward cotton leaves strongly influenced the malondialdehyde (MDA) contents, which, in turn, inhibited biomass production. SA and AsA pretreated cotton seedlings showed better growth under Cu stress. Despite increase in overall Cu uptake, the SA-pretreated seedlings could defy Cu toxicity through inhibited Cu translocation and modification in the activities of antioxidative enzymes. Whereas, tolerance to Cu-induced toxicity in AsA pretreated plants was associated with Cu exclusion from tissues and reduction of the overall Cu uptake. The present study revealed that the alleviatory role of AsA was significantly higher than SA regarding Cu stress in our experimental cotton genotypes. Furthermore, the hybrid cotton genotype (ZD14) performed well followed by J208 and Z905 in the present experimental setup.