Advances in the Concept and Methods of Seed Priming
2019
The critical stages during the growth of crops are the uniform
seedgermination, early seedling growth, and uniform plant stand. Low crop yield is attributed to uneven
seedgermination and seedling growth. Therefore, the quality of
seedcan be improved through priming in addition to the field management techniques for better
seedgermination. Priming is a physiological technique of
seedhydration and drying to enhance the pregerminative metabolic process for rapid germination, seedling growth, and final yield under normal as well as stressed conditions. The primed
seedsshow faster and uniform
seedgermination due to different enzyme activation, metabolic activities, biochemical process of cell repair, protein synthesis, and improvement of the antioxidant defense system as compared to unprimed
seeds. There are many techniques of
seedpriming which are broadly divided into conventional methods (hydro-priming, osmo-priming, nutrient priming, chemical priming, bio-priming, and priming with plant growth regulators) and advanced methods (nano-priming and priming with
physical agents). However, priming is strongly affected by various factors such as temperature, aeration, light, priming duration, and
seedcharacteristics. This chapter highlights the priming mechanism and the available technologies as a tool for superficial
seedgermination and crop stand. An experiment with reference to the importance of priming toward vigor
seedgermination and seedling growth was conducted, and its results have been added in this chapter.
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