PJB-2022-150
The effect of Priming Period,Methyl Jasmonate, salt stress and their Interaction on Phytohormone Homeostasis of Cucumis sativus L. seeds.
WASSAN MUDHER HUSSEIN ABO AL TIMMEN
Abstract
Abstract: A factorial experiment was conducted to investigate the effect of priming period of methyl jasmonate (MeJA) on seed germination and seedling growth of Cucumis sativus L. seeds exposed to salt stress. Two priming period (24 and 72) hours, four MeJA concentrations (0, 10-4, 10-5, 10-6) M and four sodium chloride (NaCl) concentrations (0, 100, 150, 200 ) mM were used. Studying the single effect, dual and triple interaction among them was approached to explaine the results. The results showed a significant decrease in in germination percentage, shoot length , root length, wet weight, auxin(IAA), gibberellin ( GA), cytokinin (CK) and abscisic acid (ABA) concentration during salt stress. While priming seeds with for 72 hours caused a significant increase in all growth parameters due to the effect of MeJA on IAA, GA, CK, ABA concentration in comparision to the seeds primed for 24 hours. The dual and triple interaction illustrate that MeJA has an impact role on relieving the deleterious effect of salt stress through increasing growth parameters to a levels exceeded the seeds in the control, especially priming for 72 hours via controlling endogenous hormones during salt stress. As well as, it has been noticed that MeJA stand out its effect during salt stress rather than unstressed plants.
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