Effects of Exogenous Nitric Oxide on Germination and Physiological Properties of Basil under Salinity Stress

Authors

1 Department of Agronomy, Ferdowsi University of Mashhad, Mashhad, Iran

2 Department of Agronomy, Shahid Bahonar University of Kerman, Kerman, Iran

3 Faculty of Agriculture, Zabol University, Zabol, Iran

4 Horticulture Research Institute, Shahid Bahonar University of Kerman, Kerman, Iran

Abstract

Nitric oxide (NO) is a bioactive molecule, which was found to have several physiological roles, including antioxidant. To have a better understanding of the effects of NO concentrations (0, 0.1 and 0.2 mM) on germination, growth, photosynthetic pigments, lipid peroxidation and antioxidant activity of basil (Ocimum basilicum L.) under different salinity concentrations (0, 100 and 200 mM of NaCl), a factorial experiment based on completely randomized design was carried out. Results revealed that salinity caused a significant decrease in germination characteristics and growth of basil. Increasing salinity concentration led to significant increase in the activity of superoxide dismutase (SOD), catalase (CAT), Ascorbate peroxidase (APX), proline content, malondialdehyde (MDA) and electrolyte leakage while content of photosynthetic pigments and relative water content were reduced. Application of NO (0.1 and 0.2 mM) under salinity stress improved germination traits, increased dry weight, chlorophyll content, antioxidant activity and proline content, while MDA content and electrolyte leakage were decreased. These results suggest that NO might induce salt tolerance in basil by preventing oxidative damage.

Keywords

References

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Journal of Medicinal plants and By-Products
Volume 2, Issue 1
April 2013
Pages 103-113

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