Advances of seed hormonal priming

Hormonal priming is an important component of seed priming. It has great significance for seed germination, seedling growth, stress tolerance and yield increase. Based on the current research situation, we summarized the concept and application range of hormonal priming, illustrated the positive effects of hormonal priming on plant growth. Furthermore, biochemistry and molecular mechanism of seed hormonal priming were explained. In addition, we pointed out that hormonal concentration, priming time and drying conditions are the most important factors that constraint the priming effect. To improve the research in the future, priming mechanism should be intensively studied based on the genomics and proteome approach, and increase the use of hormonal priming in grass species.