Effects of drought and salinity stresses on some morphological and physiological ‎characteristics of Narcissus tazetta L. flower

Document Type : Full Paper

Authors

1 M. Sc. Student, Faculty of Agriculture, University of Birjand, Birjand, Iran

2 Assistant Professor, Faculty of Agriculture, University of Birjand, Birjand, Iran

3 Associated Professor, Faculty of Agriculture, University of Birjand, Birjand, Iran

Abstract

Drought and salinity are among the most important factors limiting plant growth in many parts of the world. The purpose of this study was to investigate the interaction effects of drought and salinity stresses on some morphological and physiological factors of Narcissus tazetta L. This pot experiment was conducted as a factorial based on completely randomized design with three replications at the Faculty of Agriculture, University of Birjand in 2017.The treatments included sodium chloride (NaCl) in four levels 0 (control), 20, 40 and 60 mM and drought stress in four levels 30, 50, 70 and 90% of field capacity.The results showed that salinity and drought stresses decreased length and width of leaf, dry weight of shoot and bulb, relative water content and chlorophyll content. However, the effects of salinity and drought stress and their interaction on reducing the number of flowers in flowering stem were not significant. In contrast, electrolyte leakage and proline content were increased under these two stresses. In general, the results showed that in the range of applied treatments, the destructive effects of salinity stress on growth, ornamental and physiological traits of N. tazetta flower were more than drought stress.

Keywords


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