Osmopriming enhance the seeds emergence and seedling parameters of two rice cultivars (Oryza sativa) under tough condition

The weak germination and seedling establishment is the main limitation factor in adopting of rice seedlings in paddy fields by tough condition. Seed priming was define as the better crop stand technique, The main purpose of this study was to evaluation the effectiveness of different seed priming on seed and seedling parameters of rice cultivars. Seed priming consisted of osmopriming by PEG and KNO3 in different levels. The analysis of variance indicated that priming and media levels significantly affected germination attributes of rice cultivars. In addition, representative genotypes differently affected by priming media. The highest germination percentage compared to control in both cultivars (jolodar and Nemat) were related to priming by PEG -6 MPa (with 89.62%). Also, the results of chlorophyll content indicated that, different osmopriming showed significantly difference only in jolodar cultivar. Better responses of two mentioned cultivars and specially jolodar to osmopriming could be derived from it’s adaptively to environmental condition. Generally, the results indicated that osmopriming with studied substance mainly PEG could improve seed and seedlings parameters of rice genotypes.