Evaluating Seed Enhancement Technology's Effects on Seed Viability during Multi-Year Storage: A Case Study Using...

Area of Science:

• Ecological restoration
• Seed science and technology
• Plant conservation

Background:

• Seed viability declines during long-term storage, impacting restoration success.
• Seed enhancement technologies (SETs) require evaluation for storage tolerance.
• Herbicide protection pellet (HPP) technology is a SET with unknown storage effects.

Purpose of the Study:

• To determine if HPP seed technology affects seed viability loss during multi-year storage.
• To assess the suitability of applying HPPs to native seeds before storage for restoration.

Main Methods:

• Germination trials were conducted on 10 seedlots of four native species.
• Compared viability of: original bare seed (stored 2-3 years), seed from old HPPs, and seed from new HPPs.
• HPPs were made pre-storage (old) or post-storage (new) using original bare seed.

Main Results:

• Three perennial bunchgrasses showed equal or higher germinability from old HPPs versus controls.
• Perennial shrub seeds showed higher germinability in original bare seed than old HPPs, but new HPPs had lowest germination.
• Results suggest HPP application prior to storage is suitable for tested species.

Conclusions:

• HPP seed technology is a viable option for native seeds intended for long-term storage in restoration.
• SETs, including HPPs, should be tested for storage effects before widespread adoption in ecological restoration.
• This research supports the use of HPPs for enhancing seed resilience during storage for restoration.