Effects of priming treatments (hidropriming, methylJasmonates and salicylic acid) on threshold salt tolerance in sugarbeet (Beta vulgaris L.) seed germination and seedlings growth periods

Reeisi, Leila (2017) Effects of priming treatments (hidropriming, methylJasmonates and salicylic acid) on threshold salt tolerance in sugarbeet (Beta vulgaris L.) seed germination and seedlings growth periods. Masters thesis, University of Mohaghegh Ardabili.

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Text (بررسی تاثیر تیمارهای پرایمینگ (هیدروپرایمینگ و پرایمینگ بذر درحضور متیل جاسمونات واسید سالیسیلیک) برآستانه¬ی تحمل به شوری در مراحل جوانه‏زنی و رشد گیاهچه¬ی چغندرقند) Leila Reeisi.pdf Download (460kB) | Preview

Abstract

Plants at different stages of life encounter various stresses and these tensions are caused by living or inactive factors which affects growth of plant. Seed priming is one of the ways to improve seedlings establishment, under stress conditions. This study aimed to evaluate the effect of sugar beet seed priming with salicylic acid, methyl jasmonat and hydro priming on early growth of sugar beet seedlings under salinity conditions at the Faculty of Agriculture and Natural Resources of University Mohaghegh Ardabili. This research was conducted as factorial in a completely randomized block design with four replications in 2016 under laboratory conditions. The test factors included priming with salicylic acid at four levels (no primer, 0.5, 1, 1.5 mM), methyl jasmonate (0, 0.5, 1, 1.5 and 2 mM / L) and hydroperiming (Hydroperiming in four times 0.5, 1.5, 4, 6 hours) and the second factor was salinity levels (at four levels of distilled water), 20, 16 and 24 dS / cm. Different levels of stress Salinity was created using sodium chloride. For applying different priming levels, sugar beet seed of ARIA (SBSI0031) was moistened in priming solution for 4 hours at 15 ° C. Results indicated that with increasing salinity stress, length of root, length of hypocotyl, root dry weight and hypocotyl decreased significantly, and the percentage of non-normal seedlings increased. Pre-treatment of seed significantly increased seedling length and dry weight, but the difference between different concentrations of salicylic acid was not significant. In this experiment, with increasing salicylic acid concentration to 1.5 mM in priming solution, the percentage of normal seedlings of sugar beet decreased significantly. According to the comparison - the average number of abnormal buds decreased with the increase of seed priming level with methyl jasmonate And the least unusual buds are related to a concentration of 1 micromole per liter of methyl jasmonate. The maximum percentage and rate of germination in seed hydroperimation were obtained for 6 hours.

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