Evaluation Of Salicylic Acid Pretreatment On Germination And Seedling Growth Characteristics On Medicinal Plant Of Black Cumin (Nigella Sativa L.) under salt stress
Subject Areas : crop production
1 - گروه کشاورزی، واحد میاندوآب، دانشگاه آزاد اسلامی، میاندوآب، ایران.
Keywords: black cumin, germination, priming, salicylic acid, salt.,
Abstract :
Black cumin is used medicinally as a decongestant, regularizer, laxative, anti -constipation and sexual enhancer in men. It is also used in the treatment of cancer, diabetes, and ulcers . Salinity stress could decrease seed germination and growth of plants. It has been found that salicylic acid as endogenous growth regulator of natural phenolic compounds that cause to reduce negative effects of the salt stress on different aspects of plant life. The current research was carried out to evaluate probable positive effects of salicylic acid on the germination and initial growth properties of Nigella Sativa when put with salinity stress. For this purpose, an experiment was conducted of factorial experiment in a randomized complete design in four replications. Treatments consisted of salicylic acid levels of 0, 0.2, 0.6 and 1 mm and salinity stress of 0, 100, 150, and 200 mm. The results indicated that salinity stress decreased germination percentage, rate of germination, radical and plumule length and seedling dry weight. The greatest effect of root/shoot ratio was obtained in concentration of 200mm salt stress. While salicylic acid increased the germination percentage, germination rate, root length, shoot length, seedling dry weight and root/shoot ratio under salt stress and non-stress. Most of these traits were observed at concentration of 1 mm salicylic acid. According to the results of seed priming by salicylic acid in regions with salt stree can increase the resistance of Nigella sativa seeds in the germination stage and initial seedling growth
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