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: 113

Full Length Research Paper

Interaction of lycorine with UV-B and kinetin in cucumber (Cucumis sativus L.) Cotyledons

Karishma Jain, Sunita Kataria* and K. N. Guruprasad
School of Life Sciences, Devi Ahilya University, Vigyan Bhawan, Khandwa Road Campus, Indore 452001, India.
Email: [email protected]

  •  Accepted: 12 November 2010
  •  Published: 31 January 2011

Abstract

Interaction of lycorine, a strong inhibitor of ascorbic acid biosynthesis with kinetin and UV-B radiation has been studied in cucumber (Cucumis sativus L.) cotyledons. Lycorine inhibited hypocotyl growth of seedlings as well as kinetin induced expansion growth of cotyledons in darkness. Exposure to UV-B radiation has similar inhibitory effect on growth. Inhibition of growth by lycorine was accompanied by inhibition of ascorbic acid biosynthesis but UV-B radiation promoted ascorbic acid synthesis while inhibiting growth. The inhibitory effect of lycorine on ascorbic acid synthesis could be completely recovered by kinetin. The role of ascorbic acid as a growth promoter and as an antioxidant is discussed in the light of lycorine effect.

 

Key words: Ascorbic acid, growth, kinetin, lycorine, Ultraviolet –B radiation.

Abbreviation

APX, Ascorbic acid peroxidase; DCPIP, dichlorophenol indophenol; EDTA, ethylene diamine tetra acetic 
acid sodium salt; PVP, polyvinyl pyrrolidone; UV-B, Ultraviolet –B radiation. 
 

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This article is published under the terms of the Creative Commons Attribution License 4.0

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