Priming of soybean seeds produced under water deficit stress and different planting date using by kinetin

This experiment was carried out to study the effect of kinetin on seed germination characteristics of soybean [Glycine max (L.) Merr.] Produced under different water deficit stress and planting dates. A factorial experiment was conducted within a completely randomized design in seed & plant certification and registration research institute¡ Karaj. M7 cv. Seeds were produced under three levels of water deficit stress after 50 (no stress)¡ 100 (middle stress) and 150 mm (severe stress) evaporation from pan class A¡ in two planting dates of 22 may and 22 June. Treatments including kinetin or without it were applied in 6 different concentrations (0.1¡ 0.2¡ 0.3¡ 0.4 mM kinetin¡ distilled water¡ no distilled water and no kinetin). Our results showed that by increasing water deficit on mother plants seed quality characteristics were significantly reduced in planting date of 22 may. Those results were supported by Accelerated Ageing Test as well as standard germination test recommended by ISTA. Where¡ in planting date of 22 June¡ by severe deficit the seed quality was not affected significantly.The results of experiment showed that using concentrations 0.2 and 0.1 mM kinetin improved the important seed quality characteristics like Mean time to germination¡ Coefficient of velocity of germination¡ Mean daily germination¡ seedling vigor length index and seedling vigor weight index.