جستجوی مقالات مرتبط با کلیدواژه "هورمون پرایمینگ" در نشریات گروه "زراعت"

In order to investigate the effect of priming techniques on germination parameters of black cumin (Nigella sativa L.), sixteen seed priming treatments, including control (no priming), three hydropriming levels with distilled water (24, 36, and 48h), three osmopriming levels with PEG (solutions with osmotic potential of -4, -8 and -12 bar), three hormonepriming levels with GA3 (50, 100 and 150 ppm) and three halopriming levels with KNO3 solution (2, 3, and 4%) and three zinc sulfate levels (0.1, 0.3 and 0.5%), was conducted through a completely randomized design with four replications. The results showed that the maximom germination rate was observed with KNO3 2% and ZnSO4 0.5%, respectively. Seed priming treatment nether improve germination percentage, radicle and shoot dry weight and radicle and shoot length than control, nor decrease significantly some of them. Polyethylene glycol, GA3 and hydropriming didn’t affect the germination improvement of black cumin, however KNO3 2% and ZnSO4 0.5% treatments were effective on germination rate and seed vigor. In conclusion, seeds treatment with ZnSO4 0.5% and/or KNO3 2% could be recommended to improve the black seed germination in field conditions.

In order to investigate the effect of priming techniques on germination parameters of ajowan (Carum copticum L.) seed, an experiment was conducted in completely randomized design with four replications. The experiment treatments included a control (no priming), three hydropriming levels with distilled water (24, 36, and 48 h), three osmopriming levels with PEG (solutions with osmotic potential of -4, -8 and -12 bar), three hormone priming levels with GA3 (50, 100 and 150 ppm), three halopriming levels with KNO3 solution (2, 3, and 4%) and three zinc sulfate levels (0.1, 0.2 and 0.3 %). The results showed that priming treatments had a significant effect on all traits. The rate and percentage of germination were declined in some priming treatments compared to control. Radicle length and root dry weight were decreased in polyethylene glycol -8 bar. Polyethylene glycol -4 bar and 24h hydropriming treatments significantly decreased shoot length and allometry coefficient. However, the treatment of 100 ppm hormone priming significantly increased these traits. Hydropriming 24 h treatment significantly increased germination rate, percentage and seed vigor, but hydropriming 48 h significantly increased radicle and shoot length in compared to control. In conclusion, according to priority of germination or radicle, shoot growth and seed priming cost as well, the hydropriming 24 or 48 h can be recommended as most appropriate priming type for ajowan seeds.