Morteza Saberi; Alireza shahriari; Marziyeh bozorgmehr
Abstract
An experiment was performed aimed to investigate the effects of priming and salinity on germination and seedling growth of Stipagrostis plumose in factorial test and completely randomized design with four replications in laboratory condition. The first factor was priming consist of salicylic acid with ...
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An experiment was performed aimed to investigate the effects of priming and salinity on germination and seedling growth of Stipagrostis plumose in factorial test and completely randomized design with four replications in laboratory condition. The first factor was priming consist of salicylic acid with three levels (100, 200 and 300 mg/l), gibberellic acid with three levels (125, 250 and 500 ppm), ascorbic acid with three levels (100, 200 and 300 mg/l), and water as control, and the second factor was salinity treatment in six levels (0, 0.2, 0.4, 0.8, 1.2, 1.6 m/l). The measurement characteristics were speed of germination, percent of germination, root length, shoot length, seedling length and seed vigor. Results indicated that salt stress had inhibitive effect on germination and early seedling growth of S. plumosa. All chemical stimulators increased the germination characteristics of this plant. Also, the interaction of the tested treatments showed that gibberellic acid 250 ppm has the highest effect on improvement of germination characteristics under all levels of salinity stress. We conclude that priming seeds by gibberllic acid can increase resistance the germination of S. plumosa in areas prone to salinity.
Masoomeh Abbasi Khalaki; Ardavan Ghorbani; Sahar Samadi Khanghah
Abstract
Seed priming is a technique by which the seeds of the conditions before getting on their bed and ecological environment in terms of physiological and biochemical readiness to receive germination. Experiment was conducted using a completely randomized design in summer 2015 in rangeland laboratory– ...
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Seed priming is a technique by which the seeds of the conditions before getting on their bed and ecological environment in terms of physiological and biochemical readiness to receive germination. Experiment was conducted using a completely randomized design in summer 2015 in rangeland laboratory– University of Mohaghegh Ardebili. Treatments include: osmopriming (primed with KNO3 with the Concentration of 0.3 and 0.2 %), hormopriming (primed with GA3 with the concentration of 500 and 1000 ppm) and control (distilled water). Drought stress was applied by using solution of PEG-6000 with three levels of 0, -6 and -12 bar. Analysis of variance showed that the osmopriming and hormopriming treatments and levels of drought stress had significant difference (p<0.01) on germination and early seedling growth of F. ovina in germination percentage, germination rate, root and shoot length, vigor index, allometric coefficient and mean germination time. In general, osmopriming had more desirable performance compared with hormopriming and control. Except allometric coefficient in other Indicators, NO3 0.2 % in drought 0, has had the most impact on germination and early growth of these species.