Solute Loss from Deteriorated Cottonseed: Relationship Between Deterioration, Seed Moisture, and Solute Loss1
- John M. Halloin2,3
Loss of electrolytes from cottonseed (Gossypium hirsutum L.) soaked in water was influenced by factors in the processing history of the seeds, such as delinting procedure and post-delinting washing. Measurements of electrolyte loss were most reproducible if they determined a change during an interval (15 to 45 min) not inclusive of zero time. Cottonseed (G. hirsutum ‘Deltapine 16’) that deteriorated under controlled conditions of 100% relative humidity and 35 to 50 C was reduced in viability and exhibited increased rates of solute leakage and moisture contents. Seeds that deteriorated under conditions in which their moisture contents were held at 20% showed a slight increase in solute loss upon deterioration, but the rates of solute loss were not significantly correlated with viability losses. Experiments with both viable and heat-killed seeds revealed that the increases in solute loss were proportional to degrees of seed hydration. Solute loss from heat-killed seeds was greater than that from viable seeds at equivalent moisture contents, indicating that embryo tissue viability influenced solute leakage. However, increased solute losses due to differences in seed moisture were of greater magnitude than those due to changes in seed viability. Rate of electrolyte loss is therefore not a valid measure of cottonseed deterioration.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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