اثر پرایمینگ بذر بر بهبود شاخص‌های جوانه‌زنی بذرهای گندم در شرایط حضور مواد دگرآسیب علف‌هرز تاج‌ریزی (Solanum nigrum)

The main problem in sustainable agricultural systems especially organic agricultural systems is to growing the seeds in the presence of the weed residuals in the farm. In order to evaluating the effect of seed priming with salicylic acid on wheat seed germination improvement in presence of the allelochemicals in germination environment, an experiment was conducted with priming of wheat seeds by salicylic acid and putting them in germination conditions with the presence of different concentrations of water extracts of Black Nightshade. The results revealed that seed priming reduces negative inhibitory effects of allelopathic extracts on seed germination and increases germination rate and percentage and radicle and plumule length and dry weight. Priming independently increased length and weight of radicle and plumule and with increasing in extract concentrations, they were decreased. An interaction existed between priming and extract concentration treatments in germination percentage and rate and inhibitory percent validated appropriate effect of seed priming in reducing negative effects of allelochemicals extracts in this experiment. Generally, according to statistical analysis seed priming by 1000 µmolar salicylic acid solution is recommended for applying in wheat fields that confronts with Black Nightshade weed invasion, like organic agricultural systems.