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Volumetric components of seed imbibition
1Boyce Thompson Institute, Ithaca, New York 14853.
Plant Physiology
|November 1, 1983
Summary
Seed swelling varies significantly across species, impacting specific gravity and volume. Factors like moisture, temperature, and solution solutes influence this crucial hydration process.
Area of Science:
- Agricultural Science
- Plant Physiology
- Seed Technology
Background:
- Seed hydration is a critical initial step in germination.
- Understanding seed swelling is vital for optimizing storage and germination protocols.
- Variability in seed swelling impacts seed performance and ecological success.
Purpose of the Study:
- To quantify swelling parameters for various seed species.
- To investigate the influence of environmental factors and solution chemistry on seed swelling.
- To explore the relationship between swelling and seed properties like specific gravity.
Main Methods:
- Determined swelling quotients and coefficients for 15 different seed species.
- Analyzed the effect of moisture content, temperature, and imbibing solution solutes on swelling.
- Investigated volume changes after redrying (air and oven drying).
Main Results:
- Swelling quotients ranged from 1.1 (castorbean) to 2.8 (mungbean); coefficients from 0.09 (castorbean) to 0.42 (cowpea).
- Swelling altered seed specific gravity, linearly correlated with moisture content.
- Temperature and solutes (osmotic, salt, valence, pH, lyotropic effects) significantly affected swelling rate and extent.
Conclusions:
- Seed swelling is a complex process influenced by multiple factors.
- Imbibitional swelling may induce stress within seed tissues.
- Results provide insights into seed hydration dynamics for agricultural applications.
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