African Journal of
Bacteriology Research

  • Abbreviation: J. Bacteriol. Res.
  • Language: English
  • ISSN: 2006-9871
  • DOI: 10.5897/JBR
  • Start Year: 2009
  • Published Articles: 120

Full Length Research Paper

Influence of seedling treatment of calcium on some enzyme activity in walnut under salinity

Mohammad Ali Sheikh Beig Goharrizi1*, Mohammad Ziaee1, Mohammad Reza Mohammadpoor2 and Jafar Abdollahi3
  1Department of Horticulture, Abouraihan Campus, University of Tehran, Tehran, P C. 3391653755, Iran. 2Department of Horticulture, University of Azad, Karaj, Tehran, Iran. 3Department of Agronomy and Plant Breeding Science, Abouraihan Campus, University of Tehran, Tehran, Iran.
Email: [email protected].

  •  Accepted: 21 December 2010
  •  Published: 28 February 2011



Levels of peroxidase (POD) and catalase (CAT) enzyme activity were determined in 2 years-old walnut plants which were grown in environmental conditions characterized by high temperatures. It’s also high photosynthetic photon flux density levels and subjected to a different salinity levels for 60 days period. The present study, through an experimental campaign, was carried out on both normally irrigated and salt-stressed plants with CaCl2 in order to comprehend the plant response to salt stress and its ability to recover. Leaf samples were collected and analyzed for POD and CAT enzymes activities before the experimental period. The levels of CAT and POD activity increased in parallel with the severity of salt levels in leaves of tolerant genotypes walnut especially the plants which treated by Ca+2. This increase extended, after 6 days of salt stress usage. However, in all the treatments, POD and CAT activity was reduced significantly from 6 to 10 days after beginning the salt stress. The increase of antioxidant enzymes activity indicates its potential role in salt tolerant salt in promising walnut genotypes. The amount of antioxidant compounds increases in plant during the salt stress.


Key words: Enzyme activity, peroxidase, catalase, salinity, walnut.