AFTER RIPENING AS RELATED TO GERMINATION AND SEEDLING GROWTH
K W Reisch
Seeds of many plant species do not germinate readily for various reasons or combinations of reasons and to introduce the subject. I will define some common terms relating to this.
Seed Dormancy is an all inclusive term indicating that seed will not germinate and produce seedlings due to unfavorable environmental or internal conditions (the inhibitory factors may be external, internal or a combination of both).
Quiescence relates to the fact that seed will not germinate and produce seedlings due to unfavorable external conditions. Contributing factors are moisture, temperature, oxygen, light, or others such as pH, nutrients, carbon dioxide, or toxic conditions. This can be overcome by simply supplying the contributing factors at optimum for germination.
Rest or Internal Dormancy describes the situation where seed will not germinate and produce seedlings due to unfavorable factors or conditions specific to the seed. These may be classified in the following eight areas. Seed coat,
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