Developing physical seed priming as a practical tool for stress-resilient crop production

Area of Science:

• Agricultural Science
• Plant Biology
• Biotechnology

Background:

• Seed priming is a standard method to boost germination and seedling resilience to stress.
• Conventional priming involves seed imbibition in solutions, followed by redrying, which can affect seed longevity.
• Physical priming methods, such as radiation or non-thermal plasma, offer an alternative with potential benefits.

Purpose of the Study:

• To explore the mechanisms behind physical seed priming.
• To discuss the potential applications and outcomes of physical priming in agriculture.
• To identify key steps for the commercialization of physical priming techniques.

Main Methods:

• Review of existing literature on physical seed priming.
• Discussion of proposed mechanisms including physiochemical seed coat modification, reactive oxygen species (ROS) generation, and DNA-damage responses.
• Consideration of biological responses in metabolically inactive dry seeds and downstream effects during germination.

Main Results:

• Physical priming may induce beneficial physiological and molecular changes in seeds without significant metabolic activity.
• Potential mechanisms include alterations to the seed coat, ROS signaling, and DNA repair responses.
• Physical priming avoids negative impacts on seed longevity associated with imbibition-based methods.

Conclusions:

• Physical seed priming presents a promising avenue for enhancing crop performance and stress tolerance.
• Further research into mechanisms and optimization is needed for widespread agricultural adoption.
• Commercial exploitation requires addressing key developmental and application-specific challenges.