Effect of Priming on Germination, Growth and Physiological Indices of Seed of Native Rapeseed (Brassica napus L.) Cultivars under Drought Stress

S Mosavi | Heshmat Omidi | s shekari | F Bazvand

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URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=137144
Date :  2019/12/07
Publish in :    تحقيقات بذر- علوم و تکنولوژي بذر سابق

Link :  http://seedresearch.gorganiau.ac.ir/article_670458.html
Keywords :Potassium nitrate, Giberellic acid, Radicle, Carotenoid, Chlorophyll

Abstract :

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To evaluate the effect of seed priming on germination, growth and physiological characteristic of rapeseed cultivar Neptune under drought stress, this experiment was conducted as a factorial in a completely randomized design (CRD) with three replications at Shahed university of Tehran in 2016. Experimental factors were included drought at four levels (control, -0.3, -0.6 and -1.2 mP PEG) and four levels of priming treatment (control, hydropriming, gibberellic acid (400 ppm) and potassium nitrate (0.3 mg.lit)). In this experiment was evaluated germination and growth indices and pigments. Interaction effect of priming and drought was significant on germination indices was significant. Maximum amount of germination rate obtained in treatment of potassium nitrate so that in this treatment at -0.6 mP level of drought, germination rate in compared to control treatment and at the same level of drought increased 24 percent. Between all the treatments, amounts of mean germination time up to -0.9 mP drought at potassium nitrate was lowest amount in compared to other treatments that show seeds germinated at minimum time. The effect of drought was significant on pigments. Pigments up to -0.9 mP level of drought didnt show change and with increasing of drought level, were reduced. Generally using of priming had positive effect on germination under drought stress. Between all the treatments, Potassium nitrate was most effective on germination. Also the results of this experiment showed that pigments in this plant can stay unchanged up to -0.9 mP and not affected.