Paper Information

Journal:   IRANIAN JOURNAL OF SEED RESEARCH   2016 , Volume 3 , Number 1 #L0041; Page(s) 75 To 84.
 
Paper: 

THE EFFECT OF PRETREATMENT OF SALICYLIC ACID ON SEED GERMINATION OF MILK THISTLE (SILYBUM MARIANUM CV. BUDAKALASZI) UNDER SALINITY AND DROUGHT STRESS

 
 
Author(s):  FARHADI NASRIN, ESTAJI AHMAD, ALIZADEH SALTEH SAEIDEH*
 
* DEPARTMENT OF HORTICULTURAL SCIENCES, UNIVERSITY OF TABRIZ, TABRIZ, IRAN
 
Abstract: 

The seed pretreatment with salicylic acid has an important role in improving seed germination and increasing plant resistance to environmental stresses. This study was performed to investigate the effect of salicylic acid on seed germination of Milk thistle under salinity and drought stress. A factorial experiment was conducted in a completely randomized design with three replications. Treatments were consisted of 4 levels of salicylic acid (0, 100, 200 and 300 mg/l) and four levels of each drought and salinity stress (0, - 4, - 6, - 8 Bar). The results showed an interaction effect between pretreatment with salicylic acid and drought and salinity stresses was significant at the 1 % level. On high salinity level (-8 Bar), seed germination percentage and rate, root and shoot length, fresh and seedling dry weight reduced significantly. The short length, fresh weight and percent germination reduced in all three levels of drought stress. Pretreatment with salicylic acid (200 and 300 mg/L) significantly reduce the harmful effects of drought and salinity stress (-6 and -8 Bar) on germination and seedling growth parameters of Milk thistle. The results of this experiment showed that seed treatment with salicylic acid can lead to increase resistance of Milk thistle to salinity and drought stress in seed germination.

 
Keyword(s): ENVIRONMENTAL STRESS, MILK THISTLE, POLY ETHYLENE GLYCOL, SODIUM CHLORIDE
 
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