International Journal of
Plant Physiology and Biochemistry

  • Abbreviation: Int. J. Plant Physiol. Biochem.
  • Language: English
  • ISSN: 2141-2162
  • DOI: 10.5897/IJPPB
  • Start Year: 2009
  • Published Articles: 99

Full Length Research Paper

Alteration in photosynthetic pigments, osmolytes and antioxidants in imparting copper stress tolerance by exogenous jasmonic acid treatment in Cajanus cajan

Geetika Sirhindi
  • Geetika Sirhindi
  • Department of Botany, Punjabi University, Patiala, 147-002, India.
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Poonam Sharma
  • Poonam Sharma
  • Department of Botany, Punjabi University, Patiala, 147-002, India.
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Anil Singh
  • Anil Singh
  • Council of Science and Industrial Research, Institute of Himalayan Bioresource Technology, Post Box No. 6 Palampur (H.P.) 176061 India.
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Harpreet Kaur
  • Harpreet Kaur
  • Department of Botany, Punjabi University, Patiala, 147-002, India.
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Mudaser Mir
  • Mudaser Mir
  • Department of Botany, Punjabi University, Patiala, 147-002, India.
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  •  Received: 25 March 2015
  •  Accepted: 20 April 2015
  •  Published: 15 May 2015

Abstract

Jasmonic acid regulates various abiotic stress responses but its role in regulation of copper (Cu) homeostasis has been poorly studied. This present study was conducted to explore the potential of jasmonic acid (JA) to enhance copper (Cu) tolerance in Cajanus cajan seedlings in terms of photosynthetic pigments, osmolytes and antioxidants. Seeds treated with different concentration (0, 1 µM, 1 nM and 1 pM) of JA raised in toxic concentration of Cu for 15 days were taken for investigation. Results indicate that Cu stress led to the decreased growth in terms of shoot length, fresh and dry weight. Cu stress also increased Cu accumulation, lipid peroxidation, deteriorated chlorophyll b as well as carotenoids. Cu stress also diminished total proteins, vitamins A, C and B2, and peroxidase activity which led to the deteriorated plant growth and metabolism. Seed priming treatment of JA on the other hand improved the protein content, sugar content and vitamins indicating the potential of JA for Cu stress tolerance. The JA supplementation to Cu stressed seedlings improved Cu tolerance of C. cajan to significant level.
 
Key words: Oxidative stress, lipid peroxidation, antioxidants, osmolyte, pigeon pea.